[deliverable/linux.git] / fs / orangefs / namei.c

/*
 * (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 inode *inode;
	int ret;

	gossip_debug(GOSSIP_NAME_DEBUG, "%s: %s\n",
		     __func__,
		     dentry->d_name.name);

	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_LEN);

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

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

	if (ret < 0)
		goto out;

	inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0,
				&new_op->downcall.resp.create.refn);
	if (IS_ERR(inode)) {
		gossip_err("%s: Failed to allocate inode for file :%s:\n",
			   __func__,
			   dentry->d_name.name);
		ret = PTR_ERR(inode);
		goto out;
	}

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "%s: Assigned inode :%pU: for file :%s:\n",
		     __func__,
		     get_khandle_from_ino(inode),
		     dentry->d_name.name);

	d_instantiate(dentry, inode);
	unlock_new_inode(inode);

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "%s: dentry instantiated for %s\n",
		     __func__,
		     dentry->d_name.name);

	SetMtimeFlag(parent);
	dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
	mark_inode_dirty_sync(dir);
	ret = 0;
out:
	op_release(new_op);
	gossip_debug(GOSSIP_NAME_DEBUG,
		     "%s: %s: returning %d\n",
		     __func__,
		     dentry->d_name.name,
		     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 %s\n",
		     __func__, dentry->d_name.name);

	if (dentry->d_name.len > (ORANGEFS_NAME_LEN - 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_LEN);

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "%s: doing lookup on %s under %pU,%d (follow=%s)\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,
		     ((new_op->upcall.req.lookup.sym_follow ==
		       ORANGEFS_LOOKUP_LINK_FOLLOW) ? "yes" : "no"));

	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 %s\n",
				     dentry,
				     dentry->d_name.name);

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

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

	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;
	int ret;

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "%s: called on %s\n"
		     "  (inode %pU): Parent is %pU | fs_id %d\n",
		     __func__,
		     dentry->d_name.name,
		     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_LEN);

	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);

		SetMtimeFlag(parent);
		dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
		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 inode *inode;
	int mode = 755;
	int ret;

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

	if (!symname)
		return -EINVAL;

	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_LEN);
	strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_LEN);

	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;
	}

	inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0,
				&new_op->downcall.resp.sym.refn);
	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);

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "Inode (Symlink) %pU -> %s\n",
		     get_khandle_from_ino(inode),
		     dentry->d_name.name);

	SetMtimeFlag(parent);
	dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
	mark_inode_dirty_sync(dir);
	ret = 0;
out:
	op_release(new_op);
	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 inode *inode;
	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_LEN);

	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;
	}

	inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0,
				&new_op->downcall.resp.mkdir.refn);
	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);

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "Inode (Directory) %pU -> %s\n",
		     get_khandle_from_ino(inode),
		     dentry->d_name.name);

	/*
	 * NOTE: we have no good way to keep nlink consistent for directories
	 * across clients; keep constant at 1.
	 */
	SetMtimeFlag(parent);
	dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
	mark_inode_dirty_sync(dir);
out:
	op_release(new_op);
	return ret;
}

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

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "orangefs_rename: called (%s/%s => %s/%s) ct=%d\n",
		     old_dentry->d_parent->d_name.name,
		     old_dentry->d_name.name,
		     new_dentry->d_parent->d_name.name,
		     new_dentry->d_name.name,
		     d_count(new_dentry));

	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_LEN);
	strncpy(new_op->upcall.req.rename.d_new_name,
		new_dentry->d_name.name,
		ORANGEFS_NAME_LEN);

	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;

	op_release(new_op);
	return ret;
}

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