[linux-block.git] / fs / orangefs / inode.c

// SPDX-License-Identifier: GPL-2.0
/*
 * (C) 2001 Clemson University and The University of Chicago
 * Copyright 2018 Omnibond Systems, L.L.C.
 *
 * See COPYING in top-level directory.
 */

/*
 *  Linux VFS inode operations.
 */

#include <linux/bvec.h>
#include "protocol.h"
#include "orangefs-kernel.h"
#include "orangefs-bufmap.h"

static int orangefs_readpage(struct file *file, struct page *page)
{
	struct inode *inode = page->mapping->host;
	struct iov_iter iter;
	struct bio_vec bv;
	ssize_t ret;
	loff_t off;

	off = page_offset(page);
	bv.bv_page = page;
	bv.bv_len = PAGE_SIZE;
	bv.bv_offset = 0;
	iov_iter_bvec(&iter, READ, &bv, 1, PAGE_SIZE);

	ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter,
	    PAGE_SIZE, inode->i_size);
	/* this will only zero remaining unread portions of the page data */
	iov_iter_zero(~0U, &iter);
	/* takes care of potential aliasing */
	flush_dcache_page(page);
	if (ret < 0) {
		SetPageError(page);
	} else {
		SetPageUptodate(page);
		if (PageError(page))
			ClearPageError(page);
		ret = 0;
	}
	/* unlock the page after the ->readpage() routine completes */
	unlock_page(page);
	return ret;
}

static void orangefs_invalidatepage(struct page *page,
				 unsigned int offset,
				 unsigned int length)
{
	gossip_debug(GOSSIP_INODE_DEBUG,
		     "orangefs_invalidatepage called on page %p "
		     "(offset is %u)\n",
		     page,
		     offset);

	ClearPageUptodate(page);
	ClearPageMappedToDisk(page);
	return;

}

static int orangefs_releasepage(struct page *page, gfp_t foo)
{
	gossip_debug(GOSSIP_INODE_DEBUG,
		     "orangefs_releasepage called on page %p\n",
		     page);
	return 0;
}

static ssize_t orangefs_direct_IO(struct kiocb *iocb,
				  struct iov_iter *iter)
{
	struct file *file = iocb->ki_filp;
	loff_t pos = *(&iocb->ki_pos);
	/*
	 * This cannot happen until write_iter becomes
	 * generic_file_write_iter.
	 */
	BUG_ON(iov_iter_rw(iter) != READ);
	return do_readv_writev(ORANGEFS_IO_READ, file, &pos, iter);
}

/** ORANGEFS2 implementation of address space operations */
static const struct address_space_operations orangefs_address_operations = {
	.readpage = orangefs_readpage,
	.invalidatepage = orangefs_invalidatepage,
	.releasepage = orangefs_releasepage,
	.direct_IO = orangefs_direct_IO,
};

static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
{
	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
	struct orangefs_kernel_op_s *new_op;
	loff_t orig_size;
	int ret = -EINVAL;

	gossip_debug(GOSSIP_INODE_DEBUG,
		     "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
		     __func__,
		     get_khandle_from_ino(inode),
		     &orangefs_inode->refn.khandle,
		     orangefs_inode->refn.fs_id,
		     iattr->ia_size);

	/* Ensure that we have a up to date size, so we know if it changed. */
	ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE);
	if (ret == -ESTALE)
		ret = -EIO;
	if (ret) {
		gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
		    __func__, ret);
		return ret;
	}
	orig_size = i_size_read(inode);

	truncate_setsize(inode, iattr->ia_size);

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

	new_op->upcall.req.truncate.refn = orangefs_inode->refn;
	new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;

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

	/*
	 * the truncate has no downcall members to retrieve, but
	 * the status value tells us if it went through ok or not
	 */
	gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);

	op_release(new_op);

	if (ret != 0)
		return ret;

	if (orig_size != i_size_read(inode))
		iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;

	return ret;
}

int __orangefs_setattr(struct inode *inode, struct iattr *iattr)
{
	int ret;

	if (iattr->ia_valid & ATTR_MODE) {
		if (iattr->ia_mode & (S_ISVTX)) {
			if (is_root_handle(inode)) {
				/*
				 * allow sticky bit to be set on root (since
				 * it shows up that way by default anyhow),
				 * but don't show it to the server
				 */
				iattr->ia_mode -= S_ISVTX;
			} else {
				gossip_debug(GOSSIP_UTILS_DEBUG,
					     "User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
				return -EINVAL;
			}
		}
		if (iattr->ia_mode & (S_ISUID)) {
			gossip_debug(GOSSIP_UTILS_DEBUG,
				     "Attempting to set setuid bit (not supported); returning EINVAL.\n");
			return -EINVAL;
		}
	}

	if (iattr->ia_valid & ATTR_SIZE) {
		ret = orangefs_setattr_size(inode, iattr);
		if (ret)
			goto out;
	}

again:
	spin_lock(&inode->i_lock);
	if (ORANGEFS_I(inode)->attr_valid) {
		if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) &&
		    gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) {
			ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
		} else {
			spin_unlock(&inode->i_lock);
			write_inode_now(inode, 1);
			goto again;
		}
	} else {
		ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
		ORANGEFS_I(inode)->attr_uid = current_fsuid();
		ORANGEFS_I(inode)->attr_gid = current_fsgid();
	}
	setattr_copy(inode, iattr);
	spin_unlock(&inode->i_lock);
	mark_inode_dirty(inode);

	if (iattr->ia_valid & ATTR_MODE)
		/* change mod on a file that has ACLs */
		ret = posix_acl_chmod(inode, inode->i_mode);

	ret = 0;
out:
	return ret;
}

/*
 * Change attributes of an object referenced by dentry.
 */
int orangefs_setattr(struct dentry *dentry, struct iattr *iattr)
{
	int ret;
	gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
	    dentry);
	ret = setattr_prepare(dentry, iattr);
	if (ret)
	        goto out;
	ret = __orangefs_setattr(d_inode(dentry), iattr);
	sync_inode_metadata(d_inode(dentry), 1);
out:
	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n",
	    ret);
	return ret;
}

/*
 * Obtain attributes of an object given a dentry
 */
int orangefs_getattr(const struct path *path, struct kstat *stat,
		     u32 request_mask, unsigned int flags)
{
	int ret = -ENOENT;
	struct inode *inode = path->dentry->d_inode;

	gossip_debug(GOSSIP_INODE_DEBUG,
		     "orangefs_getattr: called on %pd mask %u\n",
		     path->dentry, request_mask);

	ret = orangefs_inode_getattr(inode,
	    request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
	if (ret == 0) {
		generic_fillattr(inode, stat);

		/* override block size reported to stat */
		if (!(request_mask & STATX_SIZE))
			stat->result_mask &= ~STATX_SIZE;

		stat->attributes_mask = STATX_ATTR_IMMUTABLE |
		    STATX_ATTR_APPEND;
		if (inode->i_flags & S_IMMUTABLE)
			stat->attributes |= STATX_ATTR_IMMUTABLE;
		if (inode->i_flags & S_APPEND)
			stat->attributes |= STATX_ATTR_APPEND;
	}
	return ret;
}

int orangefs_permission(struct inode *inode, int mask)
{
	int ret;

	if (mask & MAY_NOT_BLOCK)
		return -ECHILD;

	gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);

	/* Make sure the permission (and other common attrs) are up to date. */
	ret = orangefs_inode_getattr(inode, 0);
	if (ret < 0)
		return ret;

	return generic_permission(inode, mask);
}

int orangefs_update_time(struct inode *inode, struct timespec64 *time, int flags)
{
	struct iattr iattr;
	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
	    get_khandle_from_ino(inode));
	generic_update_time(inode, time, flags);
	memset(&iattr, 0, sizeof iattr);
        if (flags & S_ATIME)
		iattr.ia_valid |= ATTR_ATIME;
	if (flags & S_CTIME)
		iattr.ia_valid |= ATTR_CTIME;
	if (flags & S_MTIME)
		iattr.ia_valid |= ATTR_MTIME;
	return __orangefs_setattr(inode, &iattr);
}

/* ORANGEFS2 implementation of VFS inode operations for files */
static const struct inode_operations orangefs_file_inode_operations = {
	.get_acl = orangefs_get_acl,
	.set_acl = orangefs_set_acl,
	.setattr = orangefs_setattr,
	.getattr = orangefs_getattr,
	.listxattr = orangefs_listxattr,
	.permission = orangefs_permission,
	.update_time = orangefs_update_time,
};

static int orangefs_init_iops(struct inode *inode)
{
	inode->i_mapping->a_ops = &orangefs_address_operations;

	switch (inode->i_mode & S_IFMT) {
	case S_IFREG:
		inode->i_op = &orangefs_file_inode_operations;
		inode->i_fop = &orangefs_file_operations;
		break;
	case S_IFLNK:
		inode->i_op = &orangefs_symlink_inode_operations;
		break;
	case S_IFDIR:
		inode->i_op = &orangefs_dir_inode_operations;
		inode->i_fop = &orangefs_dir_operations;
		break;
	default:
		gossip_debug(GOSSIP_INODE_DEBUG,
			     "%s: unsupported mode\n",
			     __func__);
		return -EINVAL;
	}

	return 0;
}

/*
 * Given an ORANGEFS object identifier (fsid, handle), convert it into
 * a ino_t type that will be used as a hash-index from where the handle will
 * be searched for in the VFS hash table of inodes.
 */
static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
{
	if (!ref)
		return 0;
	return orangefs_khandle_to_ino(&(ref->khandle));
}

/*
 * Called to set up an inode from iget5_locked.
 */
static int orangefs_set_inode(struct inode *inode, void *data)
{
	struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
	ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
	ORANGEFS_I(inode)->refn.khandle = ref->khandle;
	ORANGEFS_I(inode)->attr_valid = 0;
	hash_init(ORANGEFS_I(inode)->xattr_cache);
	return 0;
}

/*
 * Called to determine if handles match.
 */
static int orangefs_test_inode(struct inode *inode, void *data)
{
	struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
	struct orangefs_inode_s *orangefs_inode = NULL;

	orangefs_inode = ORANGEFS_I(inode);
	/* test handles and fs_ids... */
	return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle),
				&(ref->khandle)) &&
			orangefs_inode->refn.fs_id == ref->fs_id);
}

/*
 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
 * file handle.
 *
 * @sb: the file system super block instance.
 * @ref: The ORANGEFS object for which we are trying to locate an inode.
 */
struct inode *orangefs_iget(struct super_block *sb,
		struct orangefs_object_kref *ref)
{
	struct inode *inode = NULL;
	unsigned long hash;
	int error;

	hash = orangefs_handle_hash(ref);
	inode = iget5_locked(sb,
			hash,
			orangefs_test_inode,
			orangefs_set_inode,
			ref);

	if (!inode)
		return ERR_PTR(-ENOMEM);

	if (!(inode->i_state & I_NEW))
		return inode;

	error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
	if (error) {
		iget_failed(inode);
		return ERR_PTR(error);
	}

	inode->i_ino = hash;	/* needed for stat etc */
	orangefs_init_iops(inode);
	unlock_new_inode(inode);

	gossip_debug(GOSSIP_INODE_DEBUG,
		     "iget handle %pU, fsid %d hash %ld i_ino %lu\n",
		     &ref->khandle,
		     ref->fs_id,
		     hash,
		     inode->i_ino);

	return inode;
}

/*
 * Allocate an inode for a newly created file and insert it into the inode hash.
 */
struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
		int mode, dev_t dev, struct orangefs_object_kref *ref)
{
	unsigned long hash = orangefs_handle_hash(ref);
	struct inode *inode;
	int error;

	gossip_debug(GOSSIP_INODE_DEBUG,
		     "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
		     __func__,
		     sb,
		     MAJOR(dev),
		     MINOR(dev),
		     mode);

	inode = new_inode(sb);
	if (!inode)
		return ERR_PTR(-ENOMEM);

	orangefs_set_inode(inode, ref);
	inode->i_ino = hash;	/* needed for stat etc */

	error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
	if (error)
		goto out_iput;

	orangefs_init_iops(inode);
	inode->i_rdev = dev;

	error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
	if (error < 0)
		goto out_iput;

	gossip_debug(GOSSIP_INODE_DEBUG,
		     "Initializing ACL's for inode %pU\n",
		     get_khandle_from_ino(inode));
	orangefs_init_acl(inode, dir);
	return inode;

out_iput:
	iput(inode);
	return ERR_PTR(error);
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
5db11c21 MM	2	/*
5db11c21 MM	3	* (C) 2001 Clemson University and The University of Chicago
afd9fb2a	4	* Copyright 2018 Omnibond Systems, L.L.C.
5db11c21 MM	5	*
	6	* See COPYING in top-level directory.
	7	*/
	8
	9	/*
	10	* Linux VFS inode operations.
	11	*/
	12
2f8b5444	13	#include <linux/bvec.h>
5db11c21	14	#include "protocol.h"
575e9461 MM	15	#include "orangefs-kernel.h"
575e9461 MM	16	#include "orangefs-bufmap.h"
5db11c21	17
a68d9c60	18	static int orangefs_readpage(struct file file, struct page page)
5db11c21	19	{
5db11c21	20	struct inode *inode = page->mapping->host;
c453dcfc MB	21	struct iov_iter iter;
	22	struct bio_vec bv;
	23	ssize_t ret;
	24	loff_t off;
	25
	26	off = page_offset(page);
	27	bv.bv_page = page;
	28	bv.bv_len = PAGE_SIZE;
	29	bv.bv_offset = 0;
	30	iov_iter_bvec(&iter, READ, &bv, 1, PAGE_SIZE);
	31
	32	ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter,
	33	PAGE_SIZE, inode->i_size);
74f68fce	34	/* this will only zero remaining unread portions of the page data */
c453dcfc	35	iov_iter_zero(~0U, &iter);
5db11c21 MM	36	/* takes care of potential aliasing */
5db11c21 MM	37	flush_dcache_page(page);
c453dcfc	38	if (ret < 0) {
5db11c21 MM	39	SetPageError(page);
	40	} else {
	41	SetPageUptodate(page);
	42	if (PageError(page))
	43	ClearPageError(page);
	44	ret = 0;
	45	}
5db11c21 MM	46	/* unlock the page after the ->readpage() routine completes */
	47	unlock_page(page);
	48	return ret;
	49	}
	50
8bb8aefd	51	static void orangefs_invalidatepage(struct page *page,
5db11c21 MM	52	unsigned int offset,
	53	unsigned int length)
	54	{
	55	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	56	"orangefs_invalidatepage called on page %p "
5db11c21 MM	57	"(offset is %u)\n",
	58	page,
	59	offset);
	60
	61	ClearPageUptodate(page);
	62	ClearPageMappedToDisk(page);
	63	return;
	64
	65	}
	66
8bb8aefd	67	static int orangefs_releasepage(struct page *page, gfp_t foo)
5db11c21 MM	68	{
5db11c21 MM	69	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	70	"orangefs_releasepage called on page %p\n",
5db11c21 MM	71	page);
	72	return 0;
	73	}
	74
3903f150 MM	75	static ssize_t orangefs_direct_IO(struct kiocb *iocb,
	76	struct iov_iter *iter)
	77	{
c453dcfc MB	78	struct file *file = iocb->ki_filp;
	79	loff_t pos = *(&iocb->ki_pos);
	80	/*
	81	* This cannot happen until write_iter becomes
	82	* generic_file_write_iter.
	83	*/
	84	BUG_ON(iov_iter_rw(iter) != READ);
	85	return do_readv_writev(ORANGEFS_IO_READ, file, &pos, iter);
3903f150	86	}
5db11c21	87
8bb8aefd	88	/** ORANGEFS2 implementation of address space operations */
bdd6f083	89	static const struct address_space_operations orangefs_address_operations = {
8bb8aefd	90	.readpage = orangefs_readpage,
8bb8aefd YL	91	.invalidatepage = orangefs_invalidatepage,
8bb8aefd YL	92	.releasepage = orangefs_releasepage,
3903f150	93	.direct_IO = orangefs_direct_IO,
5db11c21 MM	94	};
5db11c21 MM	95
8bb8aefd	96	static int orangefs_setattr_size(struct inode inode, struct iattr iattr)
5db11c21	97	{
8bb8aefd YL	98	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
8bb8aefd YL	99	struct orangefs_kernel_op_s *new_op;
fecd86aa	100	loff_t orig_size;
5db11c21 MM	101	int ret = -EINVAL;
	102
	103	gossip_debug(GOSSIP_INODE_DEBUG,
	104	"%s: %pU: Handle is %pU \| fs_id %d \| size is %llu\n",
	105	__func__,
	106	get_khandle_from_ino(inode),
8bb8aefd YL	107	&orangefs_inode->refn.khandle,
8bb8aefd YL	108	orangefs_inode->refn.fs_id,
5db11c21 MM	109	iattr->ia_size);
5db11c21 MM	110
fecd86aa	111	/* Ensure that we have a up to date size, so we know if it changed. */
8b60785c	112	ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE);
fecd86aa MB	113	if (ret == -ESTALE)
	114	ret = -EIO;
	115	if (ret) {
	116	gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
	117	__func__, ret);
	118	return ret;
	119	}
	120	orig_size = i_size_read(inode);
	121
5db11c21 MM	122	truncate_setsize(inode, iattr->ia_size);
5db11c21 MM	123
8bb8aefd	124	new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
5db11c21 MM	125	if (!new_op)
	126	return -ENOMEM;
	127
8bb8aefd	128	new_op->upcall.req.truncate.refn = orangefs_inode->refn;
5db11c21 MM	129	new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
5db11c21 MM	130
95f5f88f MM	131	ret = service_operation(new_op,
	132	__func__,
	133	get_interruptible_flag(inode));
5db11c21 MM	134
	135	/*
	136	* the truncate has no downcall members to retrieve, but
	137	* the status value tells us if it went through ok or not
	138	*/
95f5f88f	139	gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
5db11c21 MM	140
	141	op_release(new_op);
	142
	143	if (ret != 0)
	144	return ret;
	145
f83140c1	146	if (orig_size != i_size_read(inode))
5db11c21	147	iattr->ia_valid \|= ATTR_CTIME \| ATTR_MTIME;
5db11c21 MM	148
	149	return ret;
	150	}
	151
afd9fb2a	152	int __orangefs_setattr(struct inode inode, struct iattr iattr)
5db11c21	153	{
df2d7337	154	int ret;
5db11c21	155
afd9fb2a MB	156	if (iattr->ia_valid & ATTR_MODE) {
	157	if (iattr->ia_mode & (S_ISVTX)) {
	158	if (is_root_handle(inode)) {
	159	/*
	160	* allow sticky bit to be set on root (since
	161	* it shows up that way by default anyhow),
	162	* but don't show it to the server
	163	*/
	164	iattr->ia_mode -= S_ISVTX;
	165	} else {
	166	gossip_debug(GOSSIP_UTILS_DEBUG,
	167	"User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
	168	return -EINVAL;
	169	}
	170	}
	171	if (iattr->ia_mode & (S_ISUID)) {
	172	gossip_debug(GOSSIP_UTILS_DEBUG,
	173	"Attempting to set setuid bit (not supported); returning EINVAL.\n");
	174	return -EINVAL;
	175	}
	176	}
5db11c21	177
53950ef5	178	if (iattr->ia_valid & ATTR_SIZE) {
8bb8aefd	179	ret = orangefs_setattr_size(inode, iattr);
5db11c21 MM	180	if (ret)
	181	goto out;
	182	}
	183
afd9fb2a MB	184	again:
	185	spin_lock(&inode->i_lock);
	186	if (ORANGEFS_I(inode)->attr_valid) {
	187	if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) &&
	188	gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) {
	189	ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
	190	} else {
	191	spin_unlock(&inode->i_lock);
	192	write_inode_now(inode, 1);
	193	goto again;
	194	}
	195	} else {
	196	ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
	197	ORANGEFS_I(inode)->attr_uid = current_fsuid();
	198	ORANGEFS_I(inode)->attr_gid = current_fsgid();
	199	}
5db11c21	200	setattr_copy(inode, iattr);
afd9fb2a	201	spin_unlock(&inode->i_lock);
5db11c21 MM	202	mark_inode_dirty(inode);
5db11c21 MM	203
df2d7337	204	if (iattr->ia_valid & ATTR_MODE)
5db11c21 MM	205	/* change mod on a file that has ACLs */
	206	ret = posix_acl_chmod(inode, inode->i_mode);
	207
df2d7337	208	ret = 0;
5db11c21	209	out:
afd9fb2a MB	210	return ret;
	211	}
	212
	213	/*
	214	* Change attributes of an object referenced by dentry.
	215	*/
	216	int orangefs_setattr(struct dentry dentry, struct iattr iattr)
	217	{
	218	int ret;
	219	gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
	220	dentry);
	221	ret = setattr_prepare(dentry, iattr);
	222	if (ret)
	223	goto out;
	224	ret = __orangefs_setattr(d_inode(dentry), iattr);
	225	sync_inode_metadata(d_inode(dentry), 1);
	226	out:
	227	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n",
	228	ret);
5db11c21 MM	229	return ret;
	230	}
	231
	232	/*
	233	* Obtain attributes of an object given a dentry
	234	*/
a528d35e DH	235	int orangefs_getattr(const struct path path, struct kstat stat,
a528d35e DH	236	u32 request_mask, unsigned int flags)
5db11c21 MM	237	{
5db11c21 MM	238	int ret = -ENOENT;
a528d35e	239	struct inode *inode = path->dentry->d_inode;
5db11c21 MM	240
5db11c21 MM	241	gossip_debug(GOSSIP_INODE_DEBUG,
5e4f606e MB	242	"orangefs_getattr: called on %pd mask %u\n",
5e4f606e MB	243	path->dentry, request_mask);
5db11c21	244
8b60785c MB	245	ret = orangefs_inode_getattr(inode,
8b60785c MB	246	request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
5db11c21	247	if (ret == 0) {
a528d35e	248	generic_fillattr(inode, stat);
a7d3e78a	249
5db11c21	250	/* override block size reported to stat */
5678b5d6 CH	251	if (!(request_mask & STATX_SIZE))
5678b5d6 CH	252	stat->result_mask &= ~STATX_SIZE;
7f54910f MB	253
	254	stat->attributes_mask = STATX_ATTR_IMMUTABLE \|
	255	STATX_ATTR_APPEND;
	256	if (inode->i_flags & S_IMMUTABLE)
	257	stat->attributes \|= STATX_ATTR_IMMUTABLE;
	258	if (inode->i_flags & S_APPEND)
	259	stat->attributes \|= STATX_ATTR_APPEND;
5db11c21 MM	260	}
	261	return ret;
	262	}
	263
933287da MB	264	int orangefs_permission(struct inode *inode, int mask)
	265	{
	266	int ret;
	267
	268	if (mask & MAY_NOT_BLOCK)
	269	return -ECHILD;
	270
	271	gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
	272
	273	/* Make sure the permission (and other common attrs) are up to date. */
8b60785c	274	ret = orangefs_inode_getattr(inode, 0);
933287da MB	275	if (ret < 0)
	276	return ret;
	277
	278	return generic_permission(inode, mask);
	279	}
	280
95582b00	281	int orangefs_update_time(struct inode inode, struct timespec64 time, int flags)
a55f2d86 MB	282	{
	283	struct iattr iattr;
	284	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
	285	get_khandle_from_ino(inode));
	286	generic_update_time(inode, time, flags);
	287	memset(&iattr, 0, sizeof iattr);
	288	if (flags & S_ATIME)
	289	iattr.ia_valid \|= ATTR_ATIME;
	290	if (flags & S_CTIME)
	291	iattr.ia_valid \|= ATTR_CTIME;
	292	if (flags & S_MTIME)
	293	iattr.ia_valid \|= ATTR_MTIME;
afd9fb2a	294	return __orangefs_setattr(inode, &iattr);
a55f2d86 MB	295	}
a55f2d86 MB	296
95f5f88f	297	/* ORANGEFS2 implementation of VFS inode operations for files */
bdd6f083	298	static const struct inode_operations orangefs_file_inode_operations = {
8bb8aefd YL	299	.get_acl = orangefs_get_acl,
	300	.set_acl = orangefs_set_acl,
	301	.setattr = orangefs_setattr,
	302	.getattr = orangefs_getattr,
8bb8aefd	303	.listxattr = orangefs_listxattr,
933287da	304	.permission = orangefs_permission,
a55f2d86	305	.update_time = orangefs_update_time,
5db11c21 MM	306	};
5db11c21 MM	307
8bb8aefd	308	static int orangefs_init_iops(struct inode *inode)
5db11c21	309	{
8bb8aefd	310	inode->i_mapping->a_ops = &orangefs_address_operations;
5db11c21 MM	311
	312	switch (inode->i_mode & S_IFMT) {
	313	case S_IFREG:
8bb8aefd YL	314	inode->i_op = &orangefs_file_inode_operations;
8bb8aefd YL	315	inode->i_fop = &orangefs_file_operations;
5db11c21 MM	316	break;
5db11c21 MM	317	case S_IFLNK:
8bb8aefd	318	inode->i_op = &orangefs_symlink_inode_operations;
5db11c21 MM	319	break;
5db11c21 MM	320	case S_IFDIR:
8bb8aefd YL	321	inode->i_op = &orangefs_dir_inode_operations;
8bb8aefd YL	322	inode->i_fop = &orangefs_dir_operations;
5db11c21 MM	323	break;
	324	default:
	325	gossip_debug(GOSSIP_INODE_DEBUG,
	326	"%s: unsupported mode\n",
	327	__func__);
	328	return -EINVAL;
	329	}
	330
	331	return 0;
	332	}
	333
	334	/*
95f5f88f MM	335	* Given an ORANGEFS object identifier (fsid, handle), convert it into
95f5f88f MM	336	* a ino_t type that will be used as a hash-index from where the handle will
5db11c21 MM	337	* be searched for in the VFS hash table of inodes.
5db11c21 MM	338	*/
8bb8aefd	339	static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
5db11c21 MM	340	{
	341	if (!ref)
	342	return 0;
8bb8aefd	343	return orangefs_khandle_to_ino(&(ref->khandle));
5db11c21 MM	344	}
	345
	346	/*
	347	* Called to set up an inode from iget5_locked.
	348	*/
8bb8aefd	349	static int orangefs_set_inode(struct inode inode, void data)
5db11c21	350	{
8bb8aefd	351	struct orangefs_object_kref ref = (struct orangefs_object_kref ) data;
a4c680a0 MB	352	ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
a4c680a0 MB	353	ORANGEFS_I(inode)->refn.khandle = ref->khandle;
afd9fb2a	354	ORANGEFS_I(inode)->attr_valid = 0;
fc2e2e9c	355	hash_init(ORANGEFS_I(inode)->xattr_cache);
5db11c21 MM	356	return 0;
	357	}
	358
	359	/*
	360	* Called to determine if handles match.
	361	*/
8bb8aefd	362	static int orangefs_test_inode(struct inode inode, void data)
5db11c21	363	{
8bb8aefd YL	364	struct orangefs_object_kref ref = (struct orangefs_object_kref ) data;
8bb8aefd YL	365	struct orangefs_inode_s *orangefs_inode = NULL;
5db11c21	366
8bb8aefd	367	orangefs_inode = ORANGEFS_I(inode);
95f5f88f MM	368	/* test handles and fs_ids... */
	369	return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle),
	370	&(ref->khandle)) &&
	371	orangefs_inode->refn.fs_id == ref->fs_id);
5db11c21 MM	372	}
	373
	374	/*
8bb8aefd	375	* Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
5db11c21 MM	376	* file handle.
	377	*
	378	* @sb: the file system super block instance.
95f5f88f	379	* @ref: The ORANGEFS object for which we are trying to locate an inode.
5db11c21	380	*/
95f5f88f MM	381	struct inode orangefs_iget(struct super_block sb,
95f5f88f MM	382	struct orangefs_object_kref *ref)
5db11c21 MM	383	{
	384	struct inode *inode = NULL;
	385	unsigned long hash;
	386	int error;
	387
8bb8aefd	388	hash = orangefs_handle_hash(ref);
95f5f88f MM	389	inode = iget5_locked(sb,
	390	hash,
	391	orangefs_test_inode,
	392	orangefs_set_inode,
	393	ref);
b5d72cdc MM	394
	395	if (!inode)
	396	return ERR_PTR(-ENOMEM);
	397
	398	if (!(inode->i_state & I_NEW))
5db11c21 MM	399	return inode;
5db11c21 MM	400
8b60785c	401	error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
5db11c21 MM	402	if (error) {
	403	iget_failed(inode);
	404	return ERR_PTR(error);
	405	}
	406
	407	inode->i_ino = hash; /* needed for stat etc */
8bb8aefd	408	orangefs_init_iops(inode);
5db11c21 MM	409	unlock_new_inode(inode);
	410
	411	gossip_debug(GOSSIP_INODE_DEBUG,
	412	"iget handle %pU, fsid %d hash %ld i_ino %lu\n",
	413	&ref->khandle,
	414	ref->fs_id,
	415	hash,
	416	inode->i_ino);
	417
	418	return inode;
	419	}
	420
	421	/*
	422	* Allocate an inode for a newly created file and insert it into the inode hash.
	423	*/
8bb8aefd YL	424	struct inode orangefs_new_inode(struct super_block sb, struct inode *dir,
8bb8aefd YL	425	int mode, dev_t dev, struct orangefs_object_kref *ref)
5db11c21	426	{
8bb8aefd	427	unsigned long hash = orangefs_handle_hash(ref);
5db11c21 MM	428	struct inode *inode;
	429	int error;
	430
	431	gossip_debug(GOSSIP_INODE_DEBUG,
5253487e MM	432	"%s:(sb is %p \| MAJOR(dev)=%u \| MINOR(dev)=%u mode=%o)\n",
5253487e MM	433	__func__,
5db11c21 MM	434	sb,
	435	MAJOR(dev),
	436	MINOR(dev),
	437	mode);
	438
	439	inode = new_inode(sb);
	440	if (!inode)
56249998	441	return ERR_PTR(-ENOMEM);
5db11c21	442
8bb8aefd	443	orangefs_set_inode(inode, ref);
5db11c21 MM	444	inode->i_ino = hash; /* needed for stat etc */
5db11c21 MM	445
8b60785c	446	error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
5db11c21 MM	447	if (error)
	448	goto out_iput;
	449
8bb8aefd	450	orangefs_init_iops(inode);
5db11c21 MM	451	inode->i_rdev = dev;
5db11c21 MM	452
8bb8aefd	453	error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
5db11c21 MM	454	if (error < 0)
	455	goto out_iput;
	456
	457	gossip_debug(GOSSIP_INODE_DEBUG,
	458	"Initializing ACL's for inode %pU\n",
	459	get_khandle_from_ino(inode));
8bb8aefd	460	orangefs_init_acl(inode, dir);
5db11c21 MM	461	return inode;
	462
	463	out_iput:
	464	iput(inode);
	465	return ERR_PTR(error);
	466	}