[mirror_ubuntu-kernels.git] / fs / orangefs / inode.c

// SPDX-License-Identifier: GPL-2.0
/*
 * (C) 2001 Clemson University and The University of Chicago
 *
 * 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 read_one_page(struct page *page)
{
	int ret;
	int max_block;
	ssize_t bytes_read = 0;
	struct inode *inode = page->mapping->host;
	const __u32 blocksize = PAGE_SIZE;
	const __u32 blockbits = PAGE_SHIFT;
	struct iov_iter to;
	struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE};

	iov_iter_bvec(&to, READ, &bv, 1, PAGE_SIZE);

	gossip_debug(GOSSIP_INODE_DEBUG,
		    "orangefs_readpage called with page %p\n",
		     page);

	max_block = ((inode->i_size / blocksize) + 1);

	if (page->index < max_block) {
		loff_t blockptr_offset = (((loff_t) page->index) << blockbits);

		bytes_read = orangefs_inode_read(inode,
						 &to,
						 &blockptr_offset,
						 inode->i_size);
	}
	/* this will only zero remaining unread portions of the page data */
	iov_iter_zero(~0U, &to);
	/* takes care of potential aliasing */
	flush_dcache_page(page);
	if (bytes_read < 0) {
		ret = bytes_read;
		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_readpage(struct file *file, struct page *page)
{
	return read_one_page(page);
}

static int orangefs_readpages(struct file *file,
			   struct address_space *mapping,
			   struct list_head *pages,
			   unsigned nr_pages)
{
	int page_idx;
	int ret;

	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_readpages called\n");

	for (page_idx = 0; page_idx < nr_pages; page_idx++) {
		struct page *page;

		page = lru_to_page(pages);
		list_del(&page->lru);
		if (!add_to_page_cache(page,
				       mapping,
				       page->index,
				       readahead_gfp_mask(mapping))) {
			ret = read_one_page(page);
			gossip_debug(GOSSIP_INODE_DEBUG,
				"failure adding page to cache, read_one_page returned: %d\n",
				ret);
	      } else {
			put_page(page);
	      }
	}
	BUG_ON(!list_empty(pages));
	return 0;
}

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;
}

/*
 * Having a direct_IO entry point in the address_space_operations
 * struct causes the kernel to allows us to use O_DIRECT on
 * open. Nothing will ever call this thing, but in the future we
 * will need to be able to use O_DIRECT on open in order to support
 * AIO. Modeled after NFS, they do this too.
 */

static ssize_t orangefs_direct_IO(struct kiocb *iocb,
				  struct iov_iter *iter)
{
	gossip_debug(GOSSIP_INODE_DEBUG,
		     "orangefs_direct_IO: %pD\n",
		     iocb->ki_filp);

	return -EINVAL;
}

/** ORANGEFS2 implementation of address space operations */
static const struct address_space_operations orangefs_address_operations = {
	.readpage = orangefs_readpage,
	.readpages = orangefs_readpages,
	.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, 0, 1, STATX_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;
}

/*
 * Change attributes of an object referenced by dentry.
 */
int orangefs_setattr(struct dentry *dentry, struct iattr *iattr)
{
	int ret = -EINVAL;
	struct inode *inode = dentry->d_inode;

	gossip_debug(GOSSIP_INODE_DEBUG,
		"%s: called on %pd\n",
		__func__,
		dentry);

	ret = setattr_prepare(dentry, iattr);
	if (ret)
		goto out;

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

	setattr_copy(inode, iattr);
	mark_inode_dirty(inode);

	ret = orangefs_inode_setattr(inode, iattr);
	gossip_debug(GOSSIP_INODE_DEBUG,
		"%s: orangefs_inode_setattr returned %d\n",
		__func__,
		ret);

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

out:
	gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, 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\n",
		     path->dentry);

	ret = orangefs_inode_getattr(inode, 0, 0, request_mask);
	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, 0, STATX_MODE);
	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_inode_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;
	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, 1, 1, STATX_ALL);
	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, 1, 1, STATX_ALL);
	if (error)
		goto out_iput;

	orangefs_init_iops(inode);

	inode->i_mode = mode;
	inode->i_uid = current_fsuid();
	inode->i_gid = current_fsgid();
	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
	inode->i_size = PAGE_SIZE;
	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	/*
	3	* (C) 2001 Clemson University and The University of Chicago
	4	*
	5	* See COPYING in top-level directory.
	6	*/
	7
	8	/*
	9	* Linux VFS inode operations.
	10	*/
	11
2f8b5444	12	#include <linux/bvec.h>
5db11c21	13	#include "protocol.h"
575e9461 MM	14	#include "orangefs-kernel.h"
575e9461 MM	15	#include "orangefs-bufmap.h"
5db11c21 MM	16
	17	static int read_one_page(struct page *page)
	18	{
5db11c21 MM	19	int ret;
	20	int max_block;
	21	ssize_t bytes_read = 0;
	22	struct inode *inode = page->mapping->host;
9f8fd53c MB	23	const __u32 blocksize = PAGE_SIZE;
9f8fd53c MB	24	const __u32 blockbits = PAGE_SHIFT;
74f68fce AV	25	struct iov_iter to;
	26	struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE};
	27
aa563d7b	28	iov_iter_bvec(&to, READ, &bv, 1, PAGE_SIZE);
5db11c21 MM	29
5db11c21 MM	30	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	31	"orangefs_readpage called with page %p\n",
5db11c21	32	page);
5db11c21 MM	33
	34	max_block = ((inode->i_size / blocksize) + 1);
	35
	36	if (page->index < max_block) {
	37	loff_t blockptr_offset = (((loff_t) page->index) << blockbits);
	38
8bb8aefd YL	39	bytes_read = orangefs_inode_read(inode,
	40	&to,
	41	&blockptr_offset,
	42	inode->i_size);
5db11c21	43	}
74f68fce AV	44	/* this will only zero remaining unread portions of the page data */
74f68fce AV	45	iov_iter_zero(~0U, &to);
5db11c21 MM	46	/* takes care of potential aliasing */
	47	flush_dcache_page(page);
	48	if (bytes_read < 0) {
	49	ret = bytes_read;
	50	SetPageError(page);
	51	} else {
	52	SetPageUptodate(page);
	53	if (PageError(page))
	54	ClearPageError(page);
	55	ret = 0;
	56	}
5db11c21 MM	57	/* unlock the page after the ->readpage() routine completes */
	58	unlock_page(page);
	59	return ret;
	60	}
	61
8bb8aefd	62	static int orangefs_readpage(struct file file, struct page page)
5db11c21 MM	63	{
	64	return read_one_page(page);
	65	}
	66
8bb8aefd	67	static int orangefs_readpages(struct file *file,
5db11c21 MM	68	struct address_space *mapping,
	69	struct list_head *pages,
	70	unsigned nr_pages)
	71	{
	72	int page_idx;
	73	int ret;
	74
8bb8aefd	75	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_readpages called\n");
5db11c21 MM	76
	77	for (page_idx = 0; page_idx < nr_pages; page_idx++) {
	78	struct page *page;
	79
f86196ea	80	page = lru_to_page(pages);
5db11c21 MM	81	list_del(&page->lru);
	82	if (!add_to_page_cache(page,
	83	mapping,
	84	page->index,
8a5c743e	85	readahead_gfp_mask(mapping))) {
5db11c21 MM	86	ret = read_one_page(page);
	87	gossip_debug(GOSSIP_INODE_DEBUG,
	88	"failure adding page to cache, read_one_page returned: %d\n",
	89	ret);
	90	} else {
09cbfeaf	91	put_page(page);
5db11c21 MM	92	}
	93	}
	94	BUG_ON(!list_empty(pages));
	95	return 0;
	96	}
	97
8bb8aefd	98	static void orangefs_invalidatepage(struct page *page,
5db11c21 MM	99	unsigned int offset,
	100	unsigned int length)
	101	{
	102	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	103	"orangefs_invalidatepage called on page %p "
5db11c21 MM	104	"(offset is %u)\n",
	105	page,
	106	offset);
	107
	108	ClearPageUptodate(page);
	109	ClearPageMappedToDisk(page);
	110	return;
	111
	112	}
	113
8bb8aefd	114	static int orangefs_releasepage(struct page *page, gfp_t foo)
5db11c21 MM	115	{
5db11c21 MM	116	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	117	"orangefs_releasepage called on page %p\n",
5db11c21 MM	118	page);
	119	return 0;
	120	}
	121
	122	/*
	123	* Having a direct_IO entry point in the address_space_operations
	124	* struct causes the kernel to allows us to use O_DIRECT on
	125	* open. Nothing will ever call this thing, but in the future we
	126	* will need to be able to use O_DIRECT on open in order to support
	127	* AIO. Modeled after NFS, they do this too.
	128	*/
3903f150 MM	129
	130	static ssize_t orangefs_direct_IO(struct kiocb *iocb,
	131	struct iov_iter *iter)
	132	{
	133	gossip_debug(GOSSIP_INODE_DEBUG,
f66debf1 AV	134	"orangefs_direct_IO: %pD\n",
f66debf1 AV	135	iocb->ki_filp);
3903f150 MM	136
	137	return -EINVAL;
	138	}
5db11c21	139
8bb8aefd	140	/** ORANGEFS2 implementation of address space operations */
bdd6f083	141	static const struct address_space_operations orangefs_address_operations = {
8bb8aefd YL	142	.readpage = orangefs_readpage,
	143	.readpages = orangefs_readpages,
	144	.invalidatepage = orangefs_invalidatepage,
	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. */
68a24a6c	165	ret = orangefs_inode_getattr(inode, 0, 1, STATX_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
	205	/*
	206	* Change attributes of an object referenced by dentry.
	207	*/
8bb8aefd	208	int orangefs_setattr(struct dentry dentry, struct iattr iattr)
5db11c21 MM	209	{
	210	int ret = -EINVAL;
	211	struct inode *inode = dentry->d_inode;
	212
	213	gossip_debug(GOSSIP_INODE_DEBUG,
95f5f88f MM	214	"%s: called on %pd\n",
	215	__func__,
	216	dentry);
5db11c21	217
31051c85	218	ret = setattr_prepare(dentry, iattr);
5db11c21 MM	219	if (ret)
	220	goto out;
	221
53950ef5	222	if (iattr->ia_valid & ATTR_SIZE) {
8bb8aefd	223	ret = orangefs_setattr_size(inode, iattr);
5db11c21 MM	224	if (ret)
	225	goto out;
	226	}
	227
	228	setattr_copy(inode, iattr);
	229	mark_inode_dirty(inode);
	230
8bb8aefd	231	ret = orangefs_inode_setattr(inode, iattr);
5db11c21	232	gossip_debug(GOSSIP_INODE_DEBUG,
95f5f88f MM	233	"%s: orangefs_inode_setattr returned %d\n",
	234	__func__,
	235	ret);
5db11c21 MM	236
	237	if (!ret && (iattr->ia_valid & ATTR_MODE))
	238	/* change mod on a file that has ACLs */
	239	ret = posix_acl_chmod(inode, inode->i_mode);
	240
	241	out:
95f5f88f	242	gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
5db11c21 MM	243	return ret;
	244	}
	245
	246	/*
	247	* Obtain attributes of an object given a dentry
	248	*/
a528d35e DH	249	int orangefs_getattr(const struct path path, struct kstat stat,
a528d35e DH	250	u32 request_mask, unsigned int flags)
5db11c21 MM	251	{
5db11c21 MM	252	int ret = -ENOENT;
a528d35e	253	struct inode *inode = path->dentry->d_inode;
5db11c21 MM	254
5db11c21 MM	255	gossip_debug(GOSSIP_INODE_DEBUG,
f66debf1	256	"orangefs_getattr: called on %pd\n",
a528d35e	257	path->dentry);
5db11c21	258
68a24a6c	259	ret = orangefs_inode_getattr(inode, 0, 0, request_mask);
5db11c21	260	if (ret == 0) {
a528d35e	261	generic_fillattr(inode, stat);
a7d3e78a	262
5db11c21	263	/* override block size reported to stat */
5678b5d6 CH	264	if (!(request_mask & STATX_SIZE))
5678b5d6 CH	265	stat->result_mask &= ~STATX_SIZE;
7f54910f MB	266
	267	stat->attributes_mask = STATX_ATTR_IMMUTABLE \|
	268	STATX_ATTR_APPEND;
	269	if (inode->i_flags & S_IMMUTABLE)
	270	stat->attributes \|= STATX_ATTR_IMMUTABLE;
	271	if (inode->i_flags & S_APPEND)
	272	stat->attributes \|= STATX_ATTR_APPEND;
5db11c21 MM	273	}
	274	return ret;
	275	}
	276
933287da MB	277	int orangefs_permission(struct inode *inode, int mask)
	278	{
	279	int ret;
	280
	281	if (mask & MAY_NOT_BLOCK)
	282	return -ECHILD;
	283
	284	gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
	285
	286	/* Make sure the permission (and other common attrs) are up to date. */
68a24a6c	287	ret = orangefs_inode_getattr(inode, 0, 0, STATX_MODE);
933287da MB	288	if (ret < 0)
	289	return ret;
	290
	291	return generic_permission(inode, mask);
	292	}
	293
95582b00	294	int orangefs_update_time(struct inode inode, struct timespec64 time, int flags)
a55f2d86 MB	295	{
	296	struct iattr iattr;
	297	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
	298	get_khandle_from_ino(inode));
	299	generic_update_time(inode, time, flags);
	300	memset(&iattr, 0, sizeof iattr);
	301	if (flags & S_ATIME)
	302	iattr.ia_valid \|= ATTR_ATIME;
	303	if (flags & S_CTIME)
	304	iattr.ia_valid \|= ATTR_CTIME;
	305	if (flags & S_MTIME)
	306	iattr.ia_valid \|= ATTR_MTIME;
	307	return orangefs_inode_setattr(inode, &iattr);
	308	}
	309
95f5f88f	310	/* ORANGEFS2 implementation of VFS inode operations for files */
bdd6f083	311	static const struct inode_operations orangefs_file_inode_operations = {
8bb8aefd YL	312	.get_acl = orangefs_get_acl,
	313	.set_acl = orangefs_set_acl,
	314	.setattr = orangefs_setattr,
	315	.getattr = orangefs_getattr,
8bb8aefd	316	.listxattr = orangefs_listxattr,
933287da	317	.permission = orangefs_permission,
a55f2d86	318	.update_time = orangefs_update_time,
5db11c21 MM	319	};
5db11c21 MM	320
8bb8aefd	321	static int orangefs_init_iops(struct inode *inode)
5db11c21	322	{
8bb8aefd	323	inode->i_mapping->a_ops = &orangefs_address_operations;
5db11c21 MM	324
	325	switch (inode->i_mode & S_IFMT) {
	326	case S_IFREG:
8bb8aefd YL	327	inode->i_op = &orangefs_file_inode_operations;
8bb8aefd YL	328	inode->i_fop = &orangefs_file_operations;
5db11c21 MM	329	break;
5db11c21 MM	330	case S_IFLNK:
8bb8aefd	331	inode->i_op = &orangefs_symlink_inode_operations;
5db11c21 MM	332	break;
5db11c21 MM	333	case S_IFDIR:
8bb8aefd YL	334	inode->i_op = &orangefs_dir_inode_operations;
8bb8aefd YL	335	inode->i_fop = &orangefs_dir_operations;
5db11c21 MM	336	break;
	337	default:
	338	gossip_debug(GOSSIP_INODE_DEBUG,
	339	"%s: unsupported mode\n",
	340	__func__);
	341	return -EINVAL;
	342	}
	343
	344	return 0;
	345	}
	346
	347	/*
95f5f88f MM	348	* Given an ORANGEFS object identifier (fsid, handle), convert it into
95f5f88f MM	349	* a ino_t type that will be used as a hash-index from where the handle will
5db11c21 MM	350	* be searched for in the VFS hash table of inodes.
5db11c21 MM	351	*/
8bb8aefd	352	static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
5db11c21 MM	353	{
	354	if (!ref)
	355	return 0;
8bb8aefd	356	return orangefs_khandle_to_ino(&(ref->khandle));
5db11c21 MM	357	}
	358
	359	/*
	360	* Called to set up an inode from iget5_locked.
	361	*/
8bb8aefd	362	static int orangefs_set_inode(struct inode inode, void data)
5db11c21	363	{
8bb8aefd	364	struct orangefs_object_kref ref = (struct orangefs_object_kref ) data;
a4c680a0 MB	365	ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
a4c680a0 MB	366	ORANGEFS_I(inode)->refn.khandle = ref->khandle;
5db11c21 MM	367	return 0;
	368	}
	369
	370	/*
	371	* Called to determine if handles match.
	372	*/
8bb8aefd	373	static int orangefs_test_inode(struct inode inode, void data)
5db11c21	374	{
8bb8aefd YL	375	struct orangefs_object_kref ref = (struct orangefs_object_kref ) data;
8bb8aefd YL	376	struct orangefs_inode_s *orangefs_inode = NULL;
5db11c21	377
8bb8aefd	378	orangefs_inode = ORANGEFS_I(inode);
95f5f88f MM	379	/* test handles and fs_ids... */
	380	return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle),
	381	&(ref->khandle)) &&
	382	orangefs_inode->refn.fs_id == ref->fs_id);
5db11c21 MM	383	}
	384
	385	/*
8bb8aefd	386	* Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
5db11c21 MM	387	* file handle.
	388	*
	389	* @sb: the file system super block instance.
95f5f88f	390	* @ref: The ORANGEFS object for which we are trying to locate an inode.
5db11c21	391	*/
95f5f88f MM	392	struct inode orangefs_iget(struct super_block sb,
95f5f88f MM	393	struct orangefs_object_kref *ref)
5db11c21 MM	394	{
	395	struct inode *inode = NULL;
	396	unsigned long hash;
	397	int error;
	398
8bb8aefd	399	hash = orangefs_handle_hash(ref);
95f5f88f MM	400	inode = iget5_locked(sb,
	401	hash,
	402	orangefs_test_inode,
	403	orangefs_set_inode,
	404	ref);
b5d72cdc MM	405
	406	if (!inode)
	407	return ERR_PTR(-ENOMEM);
	408
	409	if (!(inode->i_state & I_NEW))
5db11c21 MM	410	return inode;
5db11c21 MM	411
68a24a6c	412	error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL);
5db11c21 MM	413	if (error) {
	414	iget_failed(inode);
	415	return ERR_PTR(error);
	416	}
	417
	418	inode->i_ino = hash; /* needed for stat etc */
8bb8aefd	419	orangefs_init_iops(inode);
5db11c21 MM	420	unlock_new_inode(inode);
	421
	422	gossip_debug(GOSSIP_INODE_DEBUG,
	423	"iget handle %pU, fsid %d hash %ld i_ino %lu\n",
	424	&ref->khandle,
	425	ref->fs_id,
	426	hash,
	427	inode->i_ino);
	428
	429	return inode;
	430	}
	431
	432	/*
	433	* Allocate an inode for a newly created file and insert it into the inode hash.
	434	*/
8bb8aefd YL	435	struct inode orangefs_new_inode(struct super_block sb, struct inode *dir,
8bb8aefd YL	436	int mode, dev_t dev, struct orangefs_object_kref *ref)
5db11c21	437	{
8bb8aefd	438	unsigned long hash = orangefs_handle_hash(ref);
5db11c21 MM	439	struct inode *inode;
	440	int error;
	441
	442	gossip_debug(GOSSIP_INODE_DEBUG,
5253487e MM	443	"%s:(sb is %p \| MAJOR(dev)=%u \| MINOR(dev)=%u mode=%o)\n",
5253487e MM	444	__func__,
5db11c21 MM	445	sb,
	446	MAJOR(dev),
	447	MINOR(dev),
	448	mode);
	449
	450	inode = new_inode(sb);
	451	if (!inode)
56249998	452	return ERR_PTR(-ENOMEM);
5db11c21	453
8bb8aefd	454	orangefs_set_inode(inode, ref);
5db11c21 MM	455	inode->i_ino = hash; /* needed for stat etc */
5db11c21 MM	456
68a24a6c	457	error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL);
5db11c21 MM	458	if (error)
	459	goto out_iput;
	460
8bb8aefd	461	orangefs_init_iops(inode);
5db11c21 MM	462
	463	inode->i_mode = mode;
	464	inode->i_uid = current_fsuid();
	465	inode->i_gid = current_fsgid();
078cd827	466	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
09cbfeaf	467	inode->i_size = PAGE_SIZE;
5db11c21 MM	468	inode->i_rdev = dev;
5db11c21 MM	469
8bb8aefd	470	error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
5db11c21 MM	471	if (error < 0)
	472	goto out_iput;
	473
	474	gossip_debug(GOSSIP_INODE_DEBUG,
	475	"Initializing ACL's for inode %pU\n",
	476	get_khandle_from_ino(inode));
8bb8aefd	477	orangefs_init_acl(inode, dir);
5db11c21 MM	478	return inode;
	479
	480	out_iput:
	481	iput(inode);
	482	return ERR_PTR(error);
	483	}