[linux-2.6-block.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_MAX);

	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_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 %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_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);

		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;

	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;
	}

	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_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;
	}

	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_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;

	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,
47b4948f	41	dentry->d_name.name, ORANGEFS_NAME_MAX);
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
47b4948f	119	if (dentry->d_name.len > (ORANGEFS_NAME_MAX - 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,
47b4948f	136	ORANGEFS_NAME_MAX);
274dcf55 MM	137
274dcf55 MM	138	gossip_debug(GOSSIP_NAME_DEBUG,
6ceaf781	139	"%s: doing lookup on %s under %pU,%d\n",
274dcf55 MM	140	__func__,
	141	new_op->upcall.req.lookup.d_name,
	142	&new_op->upcall.req.lookup.parent_refn.khandle,
6ceaf781	143	new_op->upcall.req.lookup.parent_refn.fs_id);
274dcf55 MM	144
	145	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
	146
	147	gossip_debug(GOSSIP_NAME_DEBUG,
	148	"Lookup Got %pU, fsid %d (ret=%d)\n",
	149	&new_op->downcall.resp.lookup.refn.khandle,
	150	new_op->downcall.resp.lookup.refn.fs_id,
	151	ret);
	152
	153	if (ret < 0) {
	154	if (ret == -ENOENT) {
	155	/*
	156	* if no inode was found, add a negative dentry to
	157	* dcache anyway; if we don't, we don't hold expected
	158	* lookup semantics and we most noticeably break
	159	* during directory renames.
	160	*
	161	* however, if the operation failed or exited, do not
	162	* add the dentry (e.g. in the case that a touch is
	163	* issued on a file that already exists that was
	164	* interrupted during this lookup -- no need to add
	165	* another negative dentry for an existing file)
	166	*/
	167
	168	gossip_debug(GOSSIP_NAME_DEBUG,
8bb8aefd	169	"orangefs_lookup: Adding negative dentry "
274dcf55 MM	170	"%p for %s\n",
	171	dentry,
	172	dentry->d_name.name);
	173
	174	d_add(dentry, NULL);
	175	res = NULL;
	176	goto out;
	177	}
	178
	179	/* must be a non-recoverable error */
	180	res = ERR_PTR(ret);
	181	goto out;
	182	}
	183
8bb8aefd	184	inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn);
274dcf55 MM	185	if (IS_ERR(inode)) {
	186	gossip_debug(GOSSIP_NAME_DEBUG,
	187	"error %ld from iget\n", PTR_ERR(inode));
	188	res = ERR_CAST(inode);
	189	goto out;
	190	}
	191
	192	gossip_debug(GOSSIP_NAME_DEBUG,
	193	"%s:%s:%d "
	194	"Found good inode [%lu] with count [%d]\n",
	195	__FILE__,
	196	__func__,
	197	__LINE__,
	198	inode->i_ino,
	199	(int)atomic_read(&inode->i_count));
	200
	201	/* update dentry/inode pair into dcache */
	202	res = d_splice_alias(inode, dentry);
	203
	204	gossip_debug(GOSSIP_NAME_DEBUG,
	205	"Lookup success (inode ct = %d)\n",
	206	(int)atomic_read(&inode->i_count));
	207	out:
	208	op_release(new_op);
	209	return res;
	210	}
	211
	212	/* return 0 on success; non-zero otherwise */
8bb8aefd	213	static int orangefs_unlink(struct inode dir, struct dentry dentry)
274dcf55 MM	214	{
274dcf55 MM	215	struct inode *inode = dentry->d_inode;
8bb8aefd YL	216	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
8bb8aefd YL	217	struct orangefs_kernel_op_s *new_op;
274dcf55 MM	218	int ret;
	219
	220	gossip_debug(GOSSIP_NAME_DEBUG,
	221	"%s: called on %s\n"
	222	" (inode %pU): Parent is %pU \| fs_id %d\n",
	223	__func__,
	224	dentry->d_name.name,
	225	get_khandle_from_ino(inode),
	226	&parent->refn.khandle,
	227	parent->refn.fs_id);
	228
8bb8aefd	229	new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE);
274dcf55 MM	230	if (!new_op)
	231	return -ENOMEM;
	232
	233	new_op->upcall.req.remove.parent_refn = parent->refn;
	234	strncpy(new_op->upcall.req.remove.d_name, dentry->d_name.name,
47b4948f	235	ORANGEFS_NAME_MAX);
274dcf55	236
8bb8aefd	237	ret = service_operation(new_op, "orangefs_unlink",
274dcf55 MM	238	get_interruptible_flag(inode));
274dcf55 MM	239
5253487e MM	240	gossip_debug(GOSSIP_NAME_DEBUG,
	241	"%s: service_operation returned:%d:\n",
	242	__func__,
	243	ret);
	244
274dcf55 MM	245	op_release(new_op);
	246
	247	if (!ret) {
	248	drop_nlink(inode);
	249
	250	SetMtimeFlag(parent);
	251	dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
	252	mark_inode_dirty_sync(dir);
	253	}
	254	return ret;
	255	}
	256
8bb8aefd	257	static int orangefs_symlink(struct inode *dir,
274dcf55 MM	258	struct dentry *dentry,
	259	const char *symname)
	260	{
8bb8aefd YL	261	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
8bb8aefd YL	262	struct orangefs_kernel_op_s *new_op;
274dcf55 MM	263	struct inode *inode;
	264	int mode = 755;
	265	int ret;
	266
	267	gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__);
	268
	269	if (!symname)
	270	return -EINVAL;
	271
c62da585 MB	272	if (strlen(symname)+1 > ORANGEFS_NAME_MAX)
	273	return -ENAMETOOLONG;
	274
8bb8aefd	275	new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK);
274dcf55 MM	276	if (!new_op)
	277	return -ENOMEM;
	278
	279	new_op->upcall.req.sym.parent_refn = parent->refn;
	280
	281	fill_default_sys_attrs(new_op->upcall.req.sym.attributes,
8bb8aefd	282	ORANGEFS_TYPE_SYMLINK,
274dcf55 MM	283	mode);
	284
	285	strncpy(new_op->upcall.req.sym.entry_name,
	286	dentry->d_name.name,
47b4948f MB	287	ORANGEFS_NAME_MAX);
47b4948f MB	288	strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_MAX);
274dcf55 MM	289
	290	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
	291
	292	gossip_debug(GOSSIP_NAME_DEBUG,
8bb8aefd	293	"Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n",
274dcf55 MM	294	&new_op->downcall.resp.sym.refn.khandle,
	295	new_op->downcall.resp.sym.refn.fs_id, ret);
	296
	297	if (ret < 0) {
	298	gossip_debug(GOSSIP_NAME_DEBUG,
	299	"%s: failed with error code %d\n",
	300	__func__, ret);
	301	goto out;
	302	}
	303
8bb8aefd	304	inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK \| mode, 0,
274dcf55 MM	305	&new_op->downcall.resp.sym.refn);
	306	if (IS_ERR(inode)) {
	307	gossip_err
8bb8aefd	308	("*** Failed to allocate orangefs symlink inode\n");
274dcf55 MM	309	ret = PTR_ERR(inode);
	310	goto out;
	311	}
	312
	313	gossip_debug(GOSSIP_NAME_DEBUG,
	314	"Assigned symlink inode new number of %pU\n",
	315	get_khandle_from_ino(inode));
	316
	317	d_instantiate(dentry, inode);
	318	unlock_new_inode(inode);
	319
	320	gossip_debug(GOSSIP_NAME_DEBUG,
	321	"Inode (Symlink) %pU -> %s\n",
	322	get_khandle_from_ino(inode),
	323	dentry->d_name.name);
	324
	325	SetMtimeFlag(parent);
	326	dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
	327	mark_inode_dirty_sync(dir);
	328	ret = 0;
	329	out:
	330	op_release(new_op);
	331	return ret;
	332	}
	333
8bb8aefd	334	static int orangefs_mkdir(struct inode dir, struct dentry dentry, umode_t mode)
274dcf55	335	{
8bb8aefd YL	336	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
8bb8aefd YL	337	struct orangefs_kernel_op_s *new_op;
274dcf55 MM	338	struct inode *inode;
	339	int ret;
	340
8bb8aefd	341	new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR);
274dcf55 MM	342	if (!new_op)
	343	return -ENOMEM;
	344
	345	new_op->upcall.req.mkdir.parent_refn = parent->refn;
	346
	347	fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes,
8bb8aefd	348	ORANGEFS_TYPE_DIRECTORY, mode);
274dcf55 MM	349
274dcf55 MM	350	strncpy(new_op->upcall.req.mkdir.d_name,
47b4948f	351	dentry->d_name.name, ORANGEFS_NAME_MAX);
274dcf55 MM	352
	353	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
	354
	355	gossip_debug(GOSSIP_NAME_DEBUG,
8bb8aefd	356	"Mkdir Got ORANGEFS handle %pU on fsid %d\n",
274dcf55 MM	357	&new_op->downcall.resp.mkdir.refn.khandle,
	358	new_op->downcall.resp.mkdir.refn.fs_id);
	359
	360	if (ret < 0) {
	361	gossip_debug(GOSSIP_NAME_DEBUG,
	362	"%s: failed with error code %d\n",
	363	__func__, ret);
	364	goto out;
	365	}
	366
8bb8aefd	367	inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR \| mode, 0,
274dcf55 MM	368	&new_op->downcall.resp.mkdir.refn);
274dcf55 MM	369	if (IS_ERR(inode)) {
8bb8aefd	370	gossip_err("*** Failed to allocate orangefs dir inode\n");
274dcf55 MM	371	ret = PTR_ERR(inode);
	372	goto out;
	373	}
	374
	375	gossip_debug(GOSSIP_NAME_DEBUG,
	376	"Assigned dir inode new number of %pU\n",
	377	get_khandle_from_ino(inode));
	378
	379	d_instantiate(dentry, inode);
	380	unlock_new_inode(inode);
	381
	382	gossip_debug(GOSSIP_NAME_DEBUG,
	383	"Inode (Directory) %pU -> %s\n",
	384	get_khandle_from_ino(inode),
	385	dentry->d_name.name);
	386
	387	/*
	388	* NOTE: we have no good way to keep nlink consistent for directories
	389	* across clients; keep constant at 1.
	390	*/
	391	SetMtimeFlag(parent);
	392	dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
	393	mark_inode_dirty_sync(dir);
	394	out:
	395	op_release(new_op);
	396	return ret;
	397	}
	398
8bb8aefd	399	static int orangefs_rename(struct inode *old_dir,
274dcf55 MM	400	struct dentry *old_dentry,
	401	struct inode *new_dir,
	402	struct dentry *new_dentry)
	403	{
8bb8aefd	404	struct orangefs_kernel_op_s *new_op;
274dcf55 MM	405	int ret;
	406
	407	gossip_debug(GOSSIP_NAME_DEBUG,
8bb8aefd	408	"orangefs_rename: called (%s/%s => %s/%s) ct=%d\n",
274dcf55 MM	409	old_dentry->d_parent->d_name.name,
	410	old_dentry->d_name.name,
	411	new_dentry->d_parent->d_name.name,
	412	new_dentry->d_name.name,
	413	d_count(new_dentry));
	414
8bb8aefd	415	new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
274dcf55 MM	416	if (!new_op)
	417	return -EINVAL;
	418
8bb8aefd YL	419	new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn;
8bb8aefd YL	420	new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn;
274dcf55 MM	421
	422	strncpy(new_op->upcall.req.rename.d_old_name,
	423	old_dentry->d_name.name,
47b4948f	424	ORANGEFS_NAME_MAX);
274dcf55 MM	425	strncpy(new_op->upcall.req.rename.d_new_name,
274dcf55 MM	426	new_dentry->d_name.name,
47b4948f	427	ORANGEFS_NAME_MAX);
274dcf55 MM	428
274dcf55 MM	429	ret = service_operation(new_op,
8bb8aefd	430	"orangefs_rename",
274dcf55 MM	431	get_interruptible_flag(old_dentry->d_inode));
	432
	433	gossip_debug(GOSSIP_NAME_DEBUG,
8bb8aefd	434	"orangefs_rename: got downcall status %d\n",
274dcf55 MM	435	ret);
	436
	437	if (new_dentry->d_inode)
	438	new_dentry->d_inode->i_ctime = CURRENT_TIME;
	439
	440	op_release(new_op);
	441	return ret;
	442	}
	443
8bb8aefd YL	444	/* ORANGEFS implementation of VFS inode operations for directories */
	445	struct inode_operations orangefs_dir_inode_operations = {
	446	.lookup = orangefs_lookup,
	447	.get_acl = orangefs_get_acl,
	448	.set_acl = orangefs_set_acl,
	449	.create = orangefs_create,
	450	.unlink = orangefs_unlink,
	451	.symlink = orangefs_symlink,
	452	.mkdir = orangefs_mkdir,
	453	.rmdir = orangefs_unlink,
	454	.rename = orangefs_rename,
	455	.setattr = orangefs_setattr,
	456	.getattr = orangefs_getattr,
274dcf55 MM	457	.setxattr = generic_setxattr,
	458	.getxattr = generic_getxattr,
	459	.removexattr = generic_removexattr,
8bb8aefd	460	.listxattr = orangefs_listxattr,
933287da	461	.permission = orangefs_permission,
274dcf55	462	};