[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_writepage(struct page *page, struct writeback_control *wbc)
{
	struct inode *inode = page->mapping->host;
	struct iov_iter iter;
	struct bio_vec bv;
	size_t len, wlen;
	ssize_t ret;
	loff_t off;

	set_page_writeback(page);

	off = page_offset(page);
	len = i_size_read(inode);
	if (off > len) {
		/* The file was truncated; there is nothing to write. */
		unlock_page(page);
		end_page_writeback(page);
		return 0;
	}
	if (off + PAGE_SIZE > len)
		wlen = len - off;
	else
		wlen = PAGE_SIZE;

	bv.bv_page = page;
	bv.bv_len = wlen;
	bv.bv_offset = off % PAGE_SIZE;
	if (wlen == 0)
		dump_stack();
	iov_iter_bvec(&iter, WRITE, &bv, 1, wlen);

	ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen,
	    len);
	if (ret < 0) {
		SetPageError(page);
		mapping_set_error(page->mapping, ret);
	} else {
		ret = 0;
	}
	unlock_page(page);
	end_page_writeback(page);
	return ret;
}

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 int orangefs_write_end(struct file *file, struct address_space *mapping,
    loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata)
{
	int r;
	r = simple_write_end(file, mapping, pos, len, copied, page, fsdata);
	mark_inode_dirty_sync(file_inode(file));
	return r;
}

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);
	return do_readv_writev(iov_iter_rw(iter) == WRITE ?
	    ORANGEFS_IO_WRITE : ORANGEFS_IO_READ, file, &pos, iter);
}

/** ORANGEFS2 implementation of address space operations */
static const struct address_space_operations orangefs_address_operations = {
	.writepage = orangefs_writepage,
	.readpage = orangefs_readpage,
	.set_page_dirty = __set_page_dirty_nobuffers,
	.write_begin = simple_write_begin,
	.write_end = orangefs_write_end,
	.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
85ac799c MB	18	static int orangefs_writepage(struct page page, struct writeback_control wbc)
	19	{
	20	struct inode *inode = page->mapping->host;
	21	struct iov_iter iter;
	22	struct bio_vec bv;
	23	size_t len, wlen;
	24	ssize_t ret;
	25	loff_t off;
	26
	27	set_page_writeback(page);
	28
	29	off = page_offset(page);
	30	len = i_size_read(inode);
	31	if (off > len) {
	32	/* The file was truncated; there is nothing to write. */
	33	unlock_page(page);
	34	end_page_writeback(page);
	35	return 0;
	36	}
	37	if (off + PAGE_SIZE > len)
	38	wlen = len - off;
	39	else
	40	wlen = PAGE_SIZE;
	41
	42	bv.bv_page = page;
	43	bv.bv_len = wlen;
	44	bv.bv_offset = off % PAGE_SIZE;
	45	if (wlen == 0)
	46	dump_stack();
	47	iov_iter_bvec(&iter, WRITE, &bv, 1, wlen);
	48
	49	ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen,
	50	len);
	51	if (ret < 0) {
	52	SetPageError(page);
	53	mapping_set_error(page->mapping, ret);
	54	} else {
	55	ret = 0;
	56	}
	57	unlock_page(page);
	58	end_page_writeback(page);
	59	return ret;
	60	}
	61
a68d9c60	62	static int orangefs_readpage(struct file file, struct page page)
5db11c21	63	{
5db11c21	64	struct inode *inode = page->mapping->host;
c453dcfc MB	65	struct iov_iter iter;
	66	struct bio_vec bv;
	67	ssize_t ret;
	68	loff_t off;
	69
	70	off = page_offset(page);
	71	bv.bv_page = page;
	72	bv.bv_len = PAGE_SIZE;
	73	bv.bv_offset = 0;
	74	iov_iter_bvec(&iter, READ, &bv, 1, PAGE_SIZE);
	75
	76	ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter,
	77	PAGE_SIZE, inode->i_size);
74f68fce	78	/* this will only zero remaining unread portions of the page data */
c453dcfc	79	iov_iter_zero(~0U, &iter);
5db11c21 MM	80	/* takes care of potential aliasing */
5db11c21 MM	81	flush_dcache_page(page);
c453dcfc	82	if (ret < 0) {
5db11c21 MM	83	SetPageError(page);
	84	} else {
	85	SetPageUptodate(page);
	86	if (PageError(page))
	87	ClearPageError(page);
	88	ret = 0;
	89	}
5db11c21 MM	90	/* unlock the page after the ->readpage() routine completes */
	91	unlock_page(page);
	92	return ret;
	93	}
	94
85ac799c MB	95	static int orangefs_write_end(struct file file, struct address_space mapping,
	96	loff_t pos, unsigned len, unsigned copied, struct page page, void fsdata)
	97	{
	98	int r;
	99	r = simple_write_end(file, mapping, pos, len, copied, page, fsdata);
	100	mark_inode_dirty_sync(file_inode(file));
	101	return r;
	102	}
	103
8bb8aefd	104	static void orangefs_invalidatepage(struct page *page,
5db11c21 MM	105	unsigned int offset,
	106	unsigned int length)
	107	{
	108	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	109	"orangefs_invalidatepage called on page %p "
5db11c21 MM	110	"(offset is %u)\n",
	111	page,
	112	offset);
	113
	114	ClearPageUptodate(page);
	115	ClearPageMappedToDisk(page);
	116	return;
	117
	118	}
	119
8bb8aefd	120	static int orangefs_releasepage(struct page *page, gfp_t foo)
5db11c21 MM	121	{
5db11c21 MM	122	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	123	"orangefs_releasepage called on page %p\n",
5db11c21 MM	124	page);
	125	return 0;
	126	}
	127
3903f150 MM	128	static ssize_t orangefs_direct_IO(struct kiocb *iocb,
	129	struct iov_iter *iter)
	130	{
c453dcfc MB	131	struct file *file = iocb->ki_filp;
c453dcfc MB	132	loff_t pos = *(&iocb->ki_pos);
85ac799c MB	133	return do_readv_writev(iov_iter_rw(iter) == WRITE ?
85ac799c MB	134	ORANGEFS_IO_WRITE : ORANGEFS_IO_READ, file, &pos, iter);
3903f150	135	}
5db11c21	136
8bb8aefd	137	/** ORANGEFS2 implementation of address space operations */
bdd6f083	138	static const struct address_space_operations orangefs_address_operations = {
85ac799c	139	.writepage = orangefs_writepage,
8bb8aefd	140	.readpage = orangefs_readpage,
85ac799c MB	141	.set_page_dirty = __set_page_dirty_nobuffers,
	142	.write_begin = simple_write_begin,
	143	.write_end = orangefs_write_end,
8bb8aefd YL	144	.invalidatepage = orangefs_invalidatepage,
8bb8aefd YL	145	.releasepage = orangefs_releasepage,
3903f150	146	.direct_IO = orangefs_direct_IO,
5db11c21 MM	147	};
5db11c21 MM	148
8bb8aefd	149	static int orangefs_setattr_size(struct inode inode, struct iattr iattr)
5db11c21	150	{
8bb8aefd YL	151	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
8bb8aefd YL	152	struct orangefs_kernel_op_s *new_op;
fecd86aa	153	loff_t orig_size;
5db11c21 MM	154	int ret = -EINVAL;
	155
	156	gossip_debug(GOSSIP_INODE_DEBUG,
	157	"%s: %pU: Handle is %pU \| fs_id %d \| size is %llu\n",
	158	__func__,
	159	get_khandle_from_ino(inode),
8bb8aefd YL	160	&orangefs_inode->refn.khandle,
8bb8aefd YL	161	orangefs_inode->refn.fs_id,
5db11c21 MM	162	iattr->ia_size);
5db11c21 MM	163
fecd86aa	164	/* Ensure that we have a up to date size, so we know if it changed. */
8b60785c	165	ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE);
fecd86aa MB	166	if (ret == -ESTALE)
	167	ret = -EIO;
	168	if (ret) {
	169	gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
	170	__func__, ret);
	171	return ret;
	172	}
	173	orig_size = i_size_read(inode);
	174
5db11c21 MM	175	truncate_setsize(inode, iattr->ia_size);
5db11c21 MM	176
8bb8aefd	177	new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
5db11c21 MM	178	if (!new_op)
	179	return -ENOMEM;
	180
8bb8aefd	181	new_op->upcall.req.truncate.refn = orangefs_inode->refn;
5db11c21 MM	182	new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
5db11c21 MM	183
95f5f88f MM	184	ret = service_operation(new_op,
	185	__func__,
	186	get_interruptible_flag(inode));
5db11c21 MM	187
	188	/*
	189	* the truncate has no downcall members to retrieve, but
	190	* the status value tells us if it went through ok or not
	191	*/
95f5f88f	192	gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
5db11c21 MM	193
	194	op_release(new_op);
	195
	196	if (ret != 0)
	197	return ret;
	198
f83140c1	199	if (orig_size != i_size_read(inode))
5db11c21	200	iattr->ia_valid \|= ATTR_CTIME \| ATTR_MTIME;
5db11c21 MM	201
	202	return ret;
	203	}
	204
afd9fb2a	205	int __orangefs_setattr(struct inode inode, struct iattr iattr)
5db11c21	206	{
df2d7337	207	int ret;
5db11c21	208
afd9fb2a MB	209	if (iattr->ia_valid & ATTR_MODE) {
	210	if (iattr->ia_mode & (S_ISVTX)) {
	211	if (is_root_handle(inode)) {
	212	/*
	213	* allow sticky bit to be set on root (since
	214	* it shows up that way by default anyhow),
	215	* but don't show it to the server
	216	*/
	217	iattr->ia_mode -= S_ISVTX;
	218	} else {
	219	gossip_debug(GOSSIP_UTILS_DEBUG,
	220	"User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
	221	return -EINVAL;
	222	}
	223	}
	224	if (iattr->ia_mode & (S_ISUID)) {
	225	gossip_debug(GOSSIP_UTILS_DEBUG,
	226	"Attempting to set setuid bit (not supported); returning EINVAL.\n");
	227	return -EINVAL;
	228	}
	229	}
5db11c21	230
53950ef5	231	if (iattr->ia_valid & ATTR_SIZE) {
8bb8aefd	232	ret = orangefs_setattr_size(inode, iattr);
5db11c21 MM	233	if (ret)
	234	goto out;
	235	}
	236
afd9fb2a MB	237	again:
	238	spin_lock(&inode->i_lock);
	239	if (ORANGEFS_I(inode)->attr_valid) {
	240	if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) &&
	241	gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) {
	242	ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
	243	} else {
	244	spin_unlock(&inode->i_lock);
	245	write_inode_now(inode, 1);
	246	goto again;
	247	}
	248	} else {
	249	ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
	250	ORANGEFS_I(inode)->attr_uid = current_fsuid();
	251	ORANGEFS_I(inode)->attr_gid = current_fsgid();
	252	}
5db11c21	253	setattr_copy(inode, iattr);
afd9fb2a	254	spin_unlock(&inode->i_lock);
5db11c21 MM	255	mark_inode_dirty(inode);
5db11c21 MM	256
df2d7337	257	if (iattr->ia_valid & ATTR_MODE)
5db11c21 MM	258	/* change mod on a file that has ACLs */
	259	ret = posix_acl_chmod(inode, inode->i_mode);
	260
df2d7337	261	ret = 0;
5db11c21	262	out:
afd9fb2a MB	263	return ret;
	264	}
	265
	266	/*
	267	* Change attributes of an object referenced by dentry.
	268	*/
	269	int orangefs_setattr(struct dentry dentry, struct iattr iattr)
	270	{
	271	int ret;
	272	gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
	273	dentry);
	274	ret = setattr_prepare(dentry, iattr);
	275	if (ret)
	276	goto out;
	277	ret = __orangefs_setattr(d_inode(dentry), iattr);
	278	sync_inode_metadata(d_inode(dentry), 1);
	279	out:
	280	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n",
	281	ret);
5db11c21 MM	282	return ret;
	283	}
	284
	285	/*
	286	* Obtain attributes of an object given a dentry
	287	*/
a528d35e DH	288	int orangefs_getattr(const struct path path, struct kstat stat,
a528d35e DH	289	u32 request_mask, unsigned int flags)
5db11c21 MM	290	{
5db11c21 MM	291	int ret = -ENOENT;
a528d35e	292	struct inode *inode = path->dentry->d_inode;
5db11c21 MM	293
5db11c21 MM	294	gossip_debug(GOSSIP_INODE_DEBUG,
5e4f606e MB	295	"orangefs_getattr: called on %pd mask %u\n",
5e4f606e MB	296	path->dentry, request_mask);
5db11c21	297
8b60785c MB	298	ret = orangefs_inode_getattr(inode,
8b60785c MB	299	request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
5db11c21	300	if (ret == 0) {
a528d35e	301	generic_fillattr(inode, stat);
a7d3e78a	302
5db11c21	303	/* override block size reported to stat */
5678b5d6 CH	304	if (!(request_mask & STATX_SIZE))
5678b5d6 CH	305	stat->result_mask &= ~STATX_SIZE;
7f54910f MB	306
	307	stat->attributes_mask = STATX_ATTR_IMMUTABLE \|
	308	STATX_ATTR_APPEND;
	309	if (inode->i_flags & S_IMMUTABLE)
	310	stat->attributes \|= STATX_ATTR_IMMUTABLE;
	311	if (inode->i_flags & S_APPEND)
	312	stat->attributes \|= STATX_ATTR_APPEND;
5db11c21 MM	313	}
	314	return ret;
	315	}
	316
933287da MB	317	int orangefs_permission(struct inode *inode, int mask)
	318	{
	319	int ret;
	320
	321	if (mask & MAY_NOT_BLOCK)
	322	return -ECHILD;
	323
	324	gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
	325
	326	/* Make sure the permission (and other common attrs) are up to date. */
8b60785c	327	ret = orangefs_inode_getattr(inode, 0);
933287da MB	328	if (ret < 0)
	329	return ret;
	330
	331	return generic_permission(inode, mask);
	332	}
	333
95582b00	334	int orangefs_update_time(struct inode inode, struct timespec64 time, int flags)
a55f2d86 MB	335	{
	336	struct iattr iattr;
	337	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
	338	get_khandle_from_ino(inode));
	339	generic_update_time(inode, time, flags);
	340	memset(&iattr, 0, sizeof iattr);
	341	if (flags & S_ATIME)
	342	iattr.ia_valid \|= ATTR_ATIME;
	343	if (flags & S_CTIME)
	344	iattr.ia_valid \|= ATTR_CTIME;
	345	if (flags & S_MTIME)
	346	iattr.ia_valid \|= ATTR_MTIME;
afd9fb2a	347	return __orangefs_setattr(inode, &iattr);
a55f2d86 MB	348	}
a55f2d86 MB	349
95f5f88f	350	/* ORANGEFS2 implementation of VFS inode operations for files */
bdd6f083	351	static const struct inode_operations orangefs_file_inode_operations = {
8bb8aefd YL	352	.get_acl = orangefs_get_acl,
	353	.set_acl = orangefs_set_acl,
	354	.setattr = orangefs_setattr,
	355	.getattr = orangefs_getattr,
8bb8aefd	356	.listxattr = orangefs_listxattr,
933287da	357	.permission = orangefs_permission,
a55f2d86	358	.update_time = orangefs_update_time,
5db11c21 MM	359	};
5db11c21 MM	360
8bb8aefd	361	static int orangefs_init_iops(struct inode *inode)
5db11c21	362	{
8bb8aefd	363	inode->i_mapping->a_ops = &orangefs_address_operations;
5db11c21 MM	364
	365	switch (inode->i_mode & S_IFMT) {
	366	case S_IFREG:
8bb8aefd YL	367	inode->i_op = &orangefs_file_inode_operations;
8bb8aefd YL	368	inode->i_fop = &orangefs_file_operations;
5db11c21 MM	369	break;
5db11c21 MM	370	case S_IFLNK:
8bb8aefd	371	inode->i_op = &orangefs_symlink_inode_operations;
5db11c21 MM	372	break;
5db11c21 MM	373	case S_IFDIR:
8bb8aefd YL	374	inode->i_op = &orangefs_dir_inode_operations;
8bb8aefd YL	375	inode->i_fop = &orangefs_dir_operations;
5db11c21 MM	376	break;
	377	default:
	378	gossip_debug(GOSSIP_INODE_DEBUG,
	379	"%s: unsupported mode\n",
	380	__func__);
	381	return -EINVAL;
	382	}
	383
	384	return 0;
	385	}
	386
	387	/*
95f5f88f MM	388	* Given an ORANGEFS object identifier (fsid, handle), convert it into
95f5f88f MM	389	* a ino_t type that will be used as a hash-index from where the handle will
5db11c21 MM	390	* be searched for in the VFS hash table of inodes.
5db11c21 MM	391	*/
8bb8aefd	392	static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
5db11c21 MM	393	{
	394	if (!ref)
	395	return 0;
8bb8aefd	396	return orangefs_khandle_to_ino(&(ref->khandle));
5db11c21 MM	397	}
	398
	399	/*
	400	* Called to set up an inode from iget5_locked.
	401	*/
8bb8aefd	402	static int orangefs_set_inode(struct inode inode, void data)
5db11c21	403	{
8bb8aefd	404	struct orangefs_object_kref ref = (struct orangefs_object_kref ) data;
a4c680a0 MB	405	ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
a4c680a0 MB	406	ORANGEFS_I(inode)->refn.khandle = ref->khandle;
afd9fb2a	407	ORANGEFS_I(inode)->attr_valid = 0;
fc2e2e9c	408	hash_init(ORANGEFS_I(inode)->xattr_cache);
5db11c21 MM	409	return 0;
	410	}
	411
	412	/*
	413	* Called to determine if handles match.
	414	*/
8bb8aefd	415	static int orangefs_test_inode(struct inode inode, void data)
5db11c21	416	{
8bb8aefd YL	417	struct orangefs_object_kref ref = (struct orangefs_object_kref ) data;
8bb8aefd YL	418	struct orangefs_inode_s *orangefs_inode = NULL;
5db11c21	419
8bb8aefd	420	orangefs_inode = ORANGEFS_I(inode);
95f5f88f MM	421	/* test handles and fs_ids... */
	422	return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle),
	423	&(ref->khandle)) &&
	424	orangefs_inode->refn.fs_id == ref->fs_id);
5db11c21 MM	425	}
	426
	427	/*
8bb8aefd	428	* Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
5db11c21 MM	429	* file handle.
	430	*
	431	* @sb: the file system super block instance.
95f5f88f	432	* @ref: The ORANGEFS object for which we are trying to locate an inode.
5db11c21	433	*/
95f5f88f MM	434	struct inode orangefs_iget(struct super_block sb,
95f5f88f MM	435	struct orangefs_object_kref *ref)
5db11c21 MM	436	{
	437	struct inode *inode = NULL;
	438	unsigned long hash;
	439	int error;
	440
8bb8aefd	441	hash = orangefs_handle_hash(ref);
95f5f88f MM	442	inode = iget5_locked(sb,
	443	hash,
	444	orangefs_test_inode,
	445	orangefs_set_inode,
	446	ref);
b5d72cdc MM	447
	448	if (!inode)
	449	return ERR_PTR(-ENOMEM);
	450
	451	if (!(inode->i_state & I_NEW))
5db11c21 MM	452	return inode;
5db11c21 MM	453
8b60785c	454	error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
5db11c21 MM	455	if (error) {
	456	iget_failed(inode);
	457	return ERR_PTR(error);
	458	}
	459
	460	inode->i_ino = hash; /* needed for stat etc */
8bb8aefd	461	orangefs_init_iops(inode);
5db11c21 MM	462	unlock_new_inode(inode);
	463
	464	gossip_debug(GOSSIP_INODE_DEBUG,
	465	"iget handle %pU, fsid %d hash %ld i_ino %lu\n",
	466	&ref->khandle,
	467	ref->fs_id,
	468	hash,
	469	inode->i_ino);
	470
	471	return inode;
	472	}
	473
	474	/*
	475	* Allocate an inode for a newly created file and insert it into the inode hash.
	476	*/
8bb8aefd YL	477	struct inode orangefs_new_inode(struct super_block sb, struct inode *dir,
8bb8aefd YL	478	int mode, dev_t dev, struct orangefs_object_kref *ref)
5db11c21	479	{
8bb8aefd	480	unsigned long hash = orangefs_handle_hash(ref);
5db11c21 MM	481	struct inode *inode;
	482	int error;
	483
	484	gossip_debug(GOSSIP_INODE_DEBUG,
5253487e MM	485	"%s:(sb is %p \| MAJOR(dev)=%u \| MINOR(dev)=%u mode=%o)\n",
5253487e MM	486	__func__,
5db11c21 MM	487	sb,
	488	MAJOR(dev),
	489	MINOR(dev),
	490	mode);
	491
	492	inode = new_inode(sb);
	493	if (!inode)
56249998	494	return ERR_PTR(-ENOMEM);
5db11c21	495
8bb8aefd	496	orangefs_set_inode(inode, ref);
5db11c21 MM	497	inode->i_ino = hash; /* needed for stat etc */
5db11c21 MM	498
8b60785c	499	error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
5db11c21 MM	500	if (error)
	501	goto out_iput;
	502
8bb8aefd	503	orangefs_init_iops(inode);
5db11c21 MM	504	inode->i_rdev = dev;
5db11c21 MM	505
8bb8aefd	506	error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
5db11c21 MM	507	if (error < 0)
	508	goto out_iput;
	509
	510	gossip_debug(GOSSIP_INODE_DEBUG,
	511	"Initializing ACL's for inode %pU\n",
	512	get_khandle_from_ino(inode));
8bb8aefd	513	orangefs_init_acl(inode, dir);
5db11c21 MM	514	return inode;
	515
	516	out_iput:
	517	iput(inode);
	518	return ERR_PTR(error);
	519	}