[linux-block.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;	/* inode->i_blksize */
	const __u32 blockbits = PAGE_SHIFT;	/* inode->i_blkbits */
	struct iov_iter to;
	struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE};

	iov_iter_bvec(&to, ITER_BVEC | 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 = list_entry(pages->prev, struct page, lru);
		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,
		     "orangefs: orangefs_truncate got return value of %d\n",
		     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,
		     "orangefs_setattr: called on %pd\n",
		     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,
		     "orangefs_setattr: inode_setattr returned %d\n",
		     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, "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;
	struct orangefs_inode_s *orangefs_inode = NULL;

	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 */
		orangefs_inode = ORANGEFS_I(inode);
		stat->blksize = orangefs_inode->blksize;

		if (request_mask & STATX_SIZE)
			stat->result_mask = STATX_BASIC_STATS;
		else
			stat->result_mask = STATX_BASIC_STATS &
			    ~STATX_SIZE;
	}
	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 timespec *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);
}

/* ORANGEDS2 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;
		inode->i_blkbits = PAGE_SHIFT;
		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 a 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);
	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 structure.
 */
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 || !(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 NULL;

	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;
09cbfeaf KS	23	const __u32 blocksize = PAGE_SIZE; /* inode->i_blksize */
09cbfeaf KS	24	const __u32 blockbits = PAGE_SHIFT; /* inode->i_blkbits */
74f68fce AV	25	struct iov_iter to;
	26	struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE};
	27
	28	iov_iter_bvec(&to, ITER_BVEC \| 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
	80	page = list_entry(pages->prev, struct page, lru);
	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;
	183
	184	ret = service_operation(new_op, __func__,
	185	get_interruptible_flag(inode));
	186
	187	/*
	188	* the truncate has no downcall members to retrieve, but
	189	* the status value tells us if it went through ok or not
	190	*/
	191	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	192	"orangefs: orangefs_truncate got return value of %d\n",
5db11c21 MM	193	ret);
	194
	195	op_release(new_op);
	196
	197	if (ret != 0)
	198	return ret;
	199
f83140c1	200	if (orig_size != i_size_read(inode))
5db11c21	201	iattr->ia_valid \|= ATTR_CTIME \| ATTR_MTIME;
5db11c21 MM	202
	203	return ret;
	204	}
	205
	206	/*
	207	* Change attributes of an object referenced by dentry.
	208	*/
8bb8aefd	209	int orangefs_setattr(struct dentry dentry, struct iattr iattr)
5db11c21 MM	210	{
	211	int ret = -EINVAL;
	212	struct inode *inode = dentry->d_inode;
	213
	214	gossip_debug(GOSSIP_INODE_DEBUG,
f66debf1 AV	215	"orangefs_setattr: called on %pd\n",
f66debf1 AV	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,
8bb8aefd	233	"orangefs_setattr: inode_setattr returned %d\n",
5db11c21 MM	234	ret);
	235
	236	if (!ret && (iattr->ia_valid & ATTR_MODE))
	237	/* change mod on a file that has ACLs */
	238	ret = posix_acl_chmod(inode, inode->i_mode);
	239
	240	out:
8bb8aefd	241	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", ret);
5db11c21 MM	242	return ret;
	243	}
	244
	245	/*
	246	* Obtain attributes of an object given a dentry
	247	*/
a528d35e DH	248	int orangefs_getattr(const struct path path, struct kstat stat,
a528d35e DH	249	u32 request_mask, unsigned int flags)
5db11c21 MM	250	{
5db11c21 MM	251	int ret = -ENOENT;
a528d35e	252	struct inode *inode = path->dentry->d_inode;
8bb8aefd	253	struct orangefs_inode_s *orangefs_inode = NULL;
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 */
8bb8aefd	264	orangefs_inode = ORANGEFS_I(inode);
a528d35e	265	stat->blksize = orangefs_inode->blksize;
68a24a6c MB	266
	267	if (request_mask & STATX_SIZE)
	268	stat->result_mask = STATX_BASIC_STATS;
	269	else
	270	stat->result_mask = STATX_BASIC_STATS &
	271	~STATX_SIZE;
5db11c21 MM	272	}
	273	return ret;
	274	}
	275
933287da MB	276	int orangefs_permission(struct inode *inode, int mask)
	277	{
	278	int ret;
	279
	280	if (mask & MAY_NOT_BLOCK)
	281	return -ECHILD;
	282
	283	gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
	284
	285	/* Make sure the permission (and other common attrs) are up to date. */
68a24a6c	286	ret = orangefs_inode_getattr(inode, 0, 0, STATX_MODE);
933287da MB	287	if (ret < 0)
	288	return ret;
	289
	290	return generic_permission(inode, mask);
	291	}
	292
a55f2d86 MB	293	int orangefs_update_time(struct inode inode, struct timespec time, int flags)
	294	{
	295	struct iattr iattr;
	296	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
	297	get_khandle_from_ino(inode));
	298	generic_update_time(inode, time, flags);
	299	memset(&iattr, 0, sizeof iattr);
	300	if (flags & S_ATIME)
	301	iattr.ia_valid \|= ATTR_ATIME;
	302	if (flags & S_CTIME)
	303	iattr.ia_valid \|= ATTR_CTIME;
	304	if (flags & S_MTIME)
	305	iattr.ia_valid \|= ATTR_MTIME;
	306	return orangefs_inode_setattr(inode, &iattr);
	307	}
	308
8bb8aefd	309	/* ORANGEDS2 implementation of VFS inode operations for files */
bdd6f083	310	static const struct inode_operations orangefs_file_inode_operations = {
8bb8aefd YL	311	.get_acl = orangefs_get_acl,
	312	.set_acl = orangefs_set_acl,
	313	.setattr = orangefs_setattr,
	314	.getattr = orangefs_getattr,
8bb8aefd	315	.listxattr = orangefs_listxattr,
933287da	316	.permission = orangefs_permission,
a55f2d86	317	.update_time = orangefs_update_time,
5db11c21 MM	318	};
5db11c21 MM	319
8bb8aefd	320	static int orangefs_init_iops(struct inode *inode)
5db11c21	321	{
8bb8aefd	322	inode->i_mapping->a_ops = &orangefs_address_operations;
5db11c21 MM	323
	324	switch (inode->i_mode & S_IFMT) {
	325	case S_IFREG:
8bb8aefd YL	326	inode->i_op = &orangefs_file_inode_operations;
8bb8aefd YL	327	inode->i_fop = &orangefs_file_operations;
09cbfeaf	328	inode->i_blkbits = PAGE_SHIFT;
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	/*
8bb8aefd	348	* Given a ORANGEFS object identifier (fsid, handle), convert it into a ino_t type
5db11c21 MM	349	* that will be used as a hash-index from where the handle will
	350	* be searched for in the VFS hash table of inodes.
	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 YL	378	orangefs_inode = ORANGEFS_I(inode);
	379	return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), &(ref->khandle))
	380	&& orangefs_inode->refn.fs_id == ref->fs_id);
5db11c21 MM	381	}
	382
	383	/*
8bb8aefd	384	* Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
5db11c21 MM	385	* file handle.
	386	*
	387	* @sb: the file system super block instance.
8bb8aefd	388	* @ref: The ORANGEFS object for which we are trying to locate an inode structure.
5db11c21	389	*/
8bb8aefd	390	struct inode orangefs_iget(struct super_block sb, struct orangefs_object_kref *ref)
5db11c21 MM	391	{
	392	struct inode *inode = NULL;
	393	unsigned long hash;
	394	int error;
	395
8bb8aefd YL	396	hash = orangefs_handle_hash(ref);
8bb8aefd YL	397	inode = iget5_locked(sb, hash, orangefs_test_inode, orangefs_set_inode, ref);
5db11c21 MM	398	if (!inode \|\| !(inode->i_state & I_NEW))
	399	return inode;
	400
68a24a6c	401	error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL);
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)
	441	return NULL;
	442
8bb8aefd	443	orangefs_set_inode(inode, ref);
5db11c21 MM	444	inode->i_ino = hash; /* needed for stat etc */
5db11c21 MM	445
68a24a6c	446	error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL);
5db11c21 MM	447	if (error)
	448	goto out_iput;
	449
8bb8aefd	450	orangefs_init_iops(inode);
5db11c21 MM	451
	452	inode->i_mode = mode;
	453	inode->i_uid = current_fsuid();
	454	inode->i_gid = current_fsgid();
078cd827	455	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
09cbfeaf	456	inode->i_size = PAGE_SIZE;
5db11c21 MM	457	inode->i_rdev = dev;
5db11c21 MM	458
8bb8aefd	459	error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
5db11c21 MM	460	if (error < 0)
	461	goto out_iput;
	462
	463	gossip_debug(GOSSIP_INODE_DEBUG,
	464	"Initializing ACL's for inode %pU\n",
	465	get_khandle_from_ino(inode));
8bb8aefd	466	orangefs_init_acl(inode, dir);
5db11c21 MM	467	return inode;
	468
	469	out_iput:
	470	iput(inode);
	471	return ERR_PTR(error);
	472	}