[linux-block.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(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,
};
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 MM	77
	78	d_instantiate(dentry, inode);
	79	unlock_new_inode(inode);
804b1737	80	orangefs_set_timeout(dentry);
8bbb20a8	81	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
68a24a6c	82	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;
274dcf55 MM	83
274dcf55 MM	84	gossip_debug(GOSSIP_NAME_DEBUG,
f66debf1	85	"%s: dentry instantiated for %pd\n",
5253487e	86	__func__,
f66debf1	87	dentry);
274dcf55	88
c2050a45	89	dir->i_mtime = dir->i_ctime = current_time(dir);
a55f2d86 MB	90	memset(&iattr, 0, sizeof iattr);
	91	iattr.ia_valid \|= ATTR_MTIME;
	92	orangefs_inode_setattr(dir, &iattr);
274dcf55 MM	93	mark_inode_dirty_sync(dir);
	94	ret = 0;
	95	out:
5253487e	96	gossip_debug(GOSSIP_NAME_DEBUG,
f66debf1	97	"%s: %pd: returning %d\n",
5253487e	98	__func__,
f66debf1	99	dentry,
5253487e	100	ret);
274dcf55 MM	101	return ret;
	102	}
	103
	104	/*
	105	* Attempt to resolve an object name (dentry->d_name), parent handle, and
	106	* fsid into a handle for the object.
	107	*/
8bb8aefd	108	static struct dentry orangefs_lookup(struct inode dir, struct dentry *dentry,
274dcf55 MM	109	unsigned int flags)
274dcf55 MM	110	{
8bb8aefd YL	111	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
8bb8aefd YL	112	struct orangefs_kernel_op_s *new_op;
274dcf55 MM	113	struct inode *inode;
	114	struct dentry *res;
	115	int ret = -EINVAL;
	116
	117	/*
	118	* in theory we could skip a lookup here (if the intent is to
	119	* create) in order to avoid a potentially failed lookup, but
	120	* leaving it in can skip a valid lookup and try to create a file
	121	* that already exists (e.g. the vfs already handles checking for
	122	* -EEXIST on O_EXCL opens, which is broken if we skip this lookup
	123	* in the create path)
	124	*/
f66debf1 AV	125	gossip_debug(GOSSIP_NAME_DEBUG, "%s called on %pd\n",
f66debf1 AV	126	__func__, dentry);
274dcf55	127
47b4948f	128	if (dentry->d_name.len > (ORANGEFS_NAME_MAX - 1))
274dcf55 MM	129	return ERR_PTR(-ENAMETOOLONG);
274dcf55 MM	130
8bb8aefd	131	new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP);
274dcf55 MM	132	if (!new_op)
	133	return ERR_PTR(-ENOMEM);
	134
7cec28e9	135	new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW;
274dcf55 MM	136
	137	gossip_debug(GOSSIP_NAME_DEBUG, "%s:%s:%d using parent %pU\n",
	138	__FILE__,
	139	__func__,
	140	__LINE__,
	141	&parent->refn.khandle);
	142	new_op->upcall.req.lookup.parent_refn = parent->refn;
	143
	144	strncpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name,
47b4948f	145	ORANGEFS_NAME_MAX);
274dcf55 MM	146
274dcf55 MM	147	gossip_debug(GOSSIP_NAME_DEBUG,
6ceaf781	148	"%s: doing lookup on %s under %pU,%d\n",
274dcf55 MM	149	__func__,
	150	new_op->upcall.req.lookup.d_name,
	151	&new_op->upcall.req.lookup.parent_refn.khandle,
6ceaf781	152	new_op->upcall.req.lookup.parent_refn.fs_id);
274dcf55 MM	153
	154	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
	155
	156	gossip_debug(GOSSIP_NAME_DEBUG,
	157	"Lookup Got %pU, fsid %d (ret=%d)\n",
	158	&new_op->downcall.resp.lookup.refn.khandle,
	159	new_op->downcall.resp.lookup.refn.fs_id,
	160	ret);
	161
	162	if (ret < 0) {
	163	if (ret == -ENOENT) {
	164	/*
	165	* if no inode was found, add a negative dentry to
	166	* dcache anyway; if we don't, we don't hold expected
	167	* lookup semantics and we most noticeably break
	168	* during directory renames.
	169	*
	170	* however, if the operation failed or exited, do not
	171	* add the dentry (e.g. in the case that a touch is
	172	* issued on a file that already exists that was
	173	* interrupted during this lookup -- no need to add
	174	* another negative dentry for an existing file)
	175	*/
	176
	177	gossip_debug(GOSSIP_NAME_DEBUG,
8bb8aefd	178	"orangefs_lookup: Adding negative dentry "
f66debf1	179	"%p for %pd\n",
274dcf55	180	dentry,
f66debf1	181	dentry);
274dcf55 MM	182
	183	d_add(dentry, NULL);
	184	res = NULL;
	185	goto out;
	186	}
	187
	188	/* must be a non-recoverable error */
	189	res = ERR_PTR(ret);
	190	goto out;
	191	}
	192
804b1737	193	orangefs_set_timeout(dentry);
31b7c1ab	194
8bb8aefd	195	inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn);
274dcf55 MM	196	if (IS_ERR(inode)) {
	197	gossip_debug(GOSSIP_NAME_DEBUG,
	198	"error %ld from iget\n", PTR_ERR(inode));
	199	res = ERR_CAST(inode);
	200	goto out;
	201	}
	202
	203	gossip_debug(GOSSIP_NAME_DEBUG,
	204	"%s:%s:%d "
	205	"Found good inode [%lu] with count [%d]\n",
	206	__FILE__,
	207	__func__,
	208	__LINE__,
	209	inode->i_ino,
	210	(int)atomic_read(&inode->i_count));
	211
	212	/* update dentry/inode pair into dcache */
	213	res = d_splice_alias(inode, dentry);
	214
	215	gossip_debug(GOSSIP_NAME_DEBUG,
	216	"Lookup success (inode ct = %d)\n",
	217	(int)atomic_read(&inode->i_count));
	218	out:
	219	op_release(new_op);
	220	return res;
	221	}
	222
	223	/* return 0 on success; non-zero otherwise */
8bb8aefd	224	static int orangefs_unlink(struct inode dir, struct dentry dentry)
274dcf55 MM	225	{
274dcf55 MM	226	struct inode *inode = dentry->d_inode;
8bb8aefd YL	227	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
8bb8aefd YL	228	struct orangefs_kernel_op_s *new_op;
a55f2d86	229	struct iattr iattr;
274dcf55 MM	230	int ret;
	231
	232	gossip_debug(GOSSIP_NAME_DEBUG,
f66debf1	233	"%s: called on %pd\n"
274dcf55 MM	234	" (inode %pU): Parent is %pU \| fs_id %d\n",
274dcf55 MM	235	__func__,
f66debf1	236	dentry,
274dcf55 MM	237	get_khandle_from_ino(inode),
	238	&parent->refn.khandle,
	239	parent->refn.fs_id);
	240
8bb8aefd	241	new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE);
274dcf55 MM	242	if (!new_op)
	243	return -ENOMEM;
	244
	245	new_op->upcall.req.remove.parent_refn = parent->refn;
	246	strncpy(new_op->upcall.req.remove.d_name, dentry->d_name.name,
47b4948f	247	ORANGEFS_NAME_MAX);
274dcf55	248
8bb8aefd	249	ret = service_operation(new_op, "orangefs_unlink",
274dcf55 MM	250	get_interruptible_flag(inode));
274dcf55 MM	251
5253487e MM	252	gossip_debug(GOSSIP_NAME_DEBUG,
	253	"%s: service_operation returned:%d:\n",
	254	__func__,
	255	ret);
	256
274dcf55 MM	257	op_release(new_op);
	258
	259	if (!ret) {
	260	drop_nlink(inode);
	261
c2050a45	262	dir->i_mtime = dir->i_ctime = current_time(dir);
a55f2d86 MB	263	memset(&iattr, 0, sizeof iattr);
	264	iattr.ia_valid \|= ATTR_MTIME;
	265	orangefs_inode_setattr(dir, &iattr);
274dcf55 MM	266	mark_inode_dirty_sync(dir);
	267	}
	268	return ret;
	269	}
	270
8bb8aefd	271	static int orangefs_symlink(struct inode *dir,
274dcf55 MM	272	struct dentry *dentry,
	273	const char *symname)
	274	{
8bb8aefd YL	275	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
8bb8aefd YL	276	struct orangefs_kernel_op_s *new_op;
db0267e7	277	struct orangefs_object_kref ref;
274dcf55	278	struct inode *inode;
a55f2d86	279	struct iattr iattr;
274dcf55 MM	280	int mode = 755;
	281	int ret;
	282
	283	gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__);
	284
	285	if (!symname)
	286	return -EINVAL;
	287
c62da585 MB	288	if (strlen(symname)+1 > ORANGEFS_NAME_MAX)
	289	return -ENAMETOOLONG;
	290
8bb8aefd	291	new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK);
274dcf55 MM	292	if (!new_op)
	293	return -ENOMEM;
	294
	295	new_op->upcall.req.sym.parent_refn = parent->refn;
	296
	297	fill_default_sys_attrs(new_op->upcall.req.sym.attributes,
8bb8aefd	298	ORANGEFS_TYPE_SYMLINK,
274dcf55 MM	299	mode);
	300
	301	strncpy(new_op->upcall.req.sym.entry_name,
	302	dentry->d_name.name,
47b4948f MB	303	ORANGEFS_NAME_MAX);
47b4948f MB	304	strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_MAX);
274dcf55 MM	305
	306	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
	307
	308	gossip_debug(GOSSIP_NAME_DEBUG,
8bb8aefd	309	"Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n",
274dcf55 MM	310	&new_op->downcall.resp.sym.refn.khandle,
	311	new_op->downcall.resp.sym.refn.fs_id, ret);
	312
	313	if (ret < 0) {
	314	gossip_debug(GOSSIP_NAME_DEBUG,
	315	"%s: failed with error code %d\n",
	316	__func__, ret);
	317	goto out;
	318	}
	319
db0267e7 MB	320	ref = new_op->downcall.resp.sym.refn;
	321	op_release(new_op);
	322
	323	inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK \| mode, 0, &ref);
274dcf55 MM	324	if (IS_ERR(inode)) {
274dcf55 MM	325	gossip_err
8bb8aefd	326	("*** Failed to allocate orangefs symlink inode\n");
274dcf55 MM	327	ret = PTR_ERR(inode);
	328	goto out;
	329	}
	330
	331	gossip_debug(GOSSIP_NAME_DEBUG,
	332	"Assigned symlink inode new number of %pU\n",
	333	get_khandle_from_ino(inode));
	334
	335	d_instantiate(dentry, inode);
	336	unlock_new_inode(inode);
804b1737	337	orangefs_set_timeout(dentry);
8bbb20a8	338	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
68a24a6c	339	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;
274dcf55 MM	340
274dcf55 MM	341	gossip_debug(GOSSIP_NAME_DEBUG,
f66debf1	342	"Inode (Symlink) %pU -> %pd\n",
274dcf55	343	get_khandle_from_ino(inode),
f66debf1	344	dentry);
274dcf55	345
c2050a45	346	dir->i_mtime = dir->i_ctime = current_time(dir);
a55f2d86 MB	347	memset(&iattr, 0, sizeof iattr);
	348	iattr.ia_valid \|= ATTR_MTIME;
	349	orangefs_inode_setattr(dir, &iattr);
274dcf55 MM	350	mark_inode_dirty_sync(dir);
	351	ret = 0;
	352	out:
274dcf55 MM	353	return ret;
	354	}
	355
8bb8aefd	356	static int orangefs_mkdir(struct inode dir, struct dentry dentry, umode_t mode)
274dcf55	357	{
8bb8aefd YL	358	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
8bb8aefd YL	359	struct orangefs_kernel_op_s *new_op;
db0267e7	360	struct orangefs_object_kref ref;
274dcf55	361	struct inode *inode;
a55f2d86	362	struct iattr iattr;
274dcf55 MM	363	int ret;
274dcf55 MM	364
8bb8aefd	365	new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR);
274dcf55 MM	366	if (!new_op)
	367	return -ENOMEM;
	368
	369	new_op->upcall.req.mkdir.parent_refn = parent->refn;
	370
	371	fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes,
8bb8aefd	372	ORANGEFS_TYPE_DIRECTORY, mode);
274dcf55 MM	373
274dcf55 MM	374	strncpy(new_op->upcall.req.mkdir.d_name,
47b4948f	375	dentry->d_name.name, ORANGEFS_NAME_MAX);
274dcf55 MM	376
	377	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
	378
	379	gossip_debug(GOSSIP_NAME_DEBUG,
8bb8aefd	380	"Mkdir Got ORANGEFS handle %pU on fsid %d\n",
274dcf55 MM	381	&new_op->downcall.resp.mkdir.refn.khandle,
	382	new_op->downcall.resp.mkdir.refn.fs_id);
	383
	384	if (ret < 0) {
	385	gossip_debug(GOSSIP_NAME_DEBUG,
	386	"%s: failed with error code %d\n",
	387	__func__, ret);
	388	goto out;
	389	}
	390
db0267e7 MB	391	ref = new_op->downcall.resp.mkdir.refn;
	392	op_release(new_op);
	393
	394	inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR \| mode, 0, &ref);
274dcf55	395	if (IS_ERR(inode)) {
8bb8aefd	396	gossip_err("*** Failed to allocate orangefs dir inode\n");
274dcf55 MM	397	ret = PTR_ERR(inode);
	398	goto out;
	399	}
	400
	401	gossip_debug(GOSSIP_NAME_DEBUG,
	402	"Assigned dir inode new number of %pU\n",
	403	get_khandle_from_ino(inode));
	404
	405	d_instantiate(dentry, inode);
	406	unlock_new_inode(inode);
804b1737	407	orangefs_set_timeout(dentry);
8bbb20a8	408	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
68a24a6c	409	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;
274dcf55 MM	410
274dcf55 MM	411	gossip_debug(GOSSIP_NAME_DEBUG,
f66debf1	412	"Inode (Directory) %pU -> %pd\n",
274dcf55	413	get_khandle_from_ino(inode),
f66debf1	414	dentry);
274dcf55 MM	415
	416	/*
	417	* NOTE: we have no good way to keep nlink consistent for directories
	418	* across clients; keep constant at 1.
	419	*/
c2050a45	420	dir->i_mtime = dir->i_ctime = current_time(dir);
a55f2d86 MB	421	memset(&iattr, 0, sizeof iattr);
	422	iattr.ia_valid \|= ATTR_MTIME;
	423	orangefs_inode_setattr(dir, &iattr);
274dcf55 MM	424	mark_inode_dirty_sync(dir);
274dcf55 MM	425	out:
274dcf55 MM	426	return ret;
	427	}
	428
8bb8aefd	429	static int orangefs_rename(struct inode *old_dir,
274dcf55 MM	430	struct dentry *old_dentry,
274dcf55 MM	431	struct inode *new_dir,
1cd66c93 MS	432	struct dentry *new_dentry,
1cd66c93 MS	433	unsigned int flags)
274dcf55	434	{
8bb8aefd	435	struct orangefs_kernel_op_s *new_op;
274dcf55 MM	436	int ret;
274dcf55 MM	437
1cd66c93 MS	438	if (flags)
	439	return -EINVAL;
	440
274dcf55	441	gossip_debug(GOSSIP_NAME_DEBUG,
96b0cffb AV	442	"orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
96b0cffb AV	443	old_dentry, new_dentry, d_count(new_dentry));
274dcf55	444
8bbb20a8	445	ORANGEFS_I(new_dentry->d_parent->d_inode)->getattr_time = jiffies - 1;
71680c18	446
8bb8aefd	447	new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
274dcf55 MM	448	if (!new_op)
	449	return -EINVAL;
	450
8bb8aefd YL	451	new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn;
8bb8aefd YL	452	new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn;
274dcf55 MM	453
	454	strncpy(new_op->upcall.req.rename.d_old_name,
	455	old_dentry->d_name.name,
47b4948f	456	ORANGEFS_NAME_MAX);
274dcf55 MM	457	strncpy(new_op->upcall.req.rename.d_new_name,
274dcf55 MM	458	new_dentry->d_name.name,
47b4948f	459	ORANGEFS_NAME_MAX);
274dcf55 MM	460
274dcf55 MM	461	ret = service_operation(new_op,
8bb8aefd	462	"orangefs_rename",
274dcf55 MM	463	get_interruptible_flag(old_dentry->d_inode));
	464
	465	gossip_debug(GOSSIP_NAME_DEBUG,
8bb8aefd	466	"orangefs_rename: got downcall status %d\n",
274dcf55 MM	467	ret);
	468
	469	if (new_dentry->d_inode)
c2050a45	470	new_dentry->d_inode->i_ctime = current_time(new_dentry->d_inode);
274dcf55 MM	471
	472	op_release(new_op);
	473	return ret;
	474	}
	475
8bb8aefd	476	/* ORANGEFS implementation of VFS inode operations for directories */
6f3fc107	477	const struct inode_operations orangefs_dir_inode_operations = {
8bb8aefd YL	478	.lookup = orangefs_lookup,
	479	.get_acl = orangefs_get_acl,
	480	.set_acl = orangefs_set_acl,
	481	.create = orangefs_create,
	482	.unlink = orangefs_unlink,
	483	.symlink = orangefs_symlink,
	484	.mkdir = orangefs_mkdir,
	485	.rmdir = orangefs_unlink,
	486	.rename = orangefs_rename,
	487	.setattr = orangefs_setattr,
	488	.getattr = orangefs_getattr,
8bb8aefd	489	.listxattr = orangefs_listxattr,
933287da	490	.permission = orangefs_permission,
a55f2d86	491	.update_time = orangefs_update_time,
274dcf55	492	};