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

/*
 * (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 */
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);
	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) &&
	    iattr->ia_size != i_size_read(inode)) {
		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);
	if (ret == 0) {
		generic_fillattr(inode, stat);

		/* override block size reported to stat */
		orangefs_inode = ORANGEFS_I(inode);
		stat->blksize = orangefs_inode->blksize;
	}
	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);
	if (ret < 0)
		return ret;

	return generic_permission(inode, mask);
}

/* ORANGEDS2 implementation of VFS inode operations for files */
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,
};

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);
	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);
	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
5db11c21 MM	1	/*
	2	* (C) 2001 Clemson University and The University of Chicago
	3	*
	4	* See COPYING in top-level directory.
	5	*/
	6
	7	/*
	8	* Linux VFS inode operations.
	9	*/
	10
2f8b5444	11	#include <linux/bvec.h>
5db11c21	12	#include "protocol.h"
575e9461 MM	13	#include "orangefs-kernel.h"
575e9461 MM	14	#include "orangefs-bufmap.h"
5db11c21 MM	15
	16	static int read_one_page(struct page *page)
	17	{
5db11c21 MM	18	int ret;
	19	int max_block;
	20	ssize_t bytes_read = 0;
	21	struct inode *inode = page->mapping->host;
09cbfeaf KS	22	const __u32 blocksize = PAGE_SIZE; /* inode->i_blksize */
09cbfeaf KS	23	const __u32 blockbits = PAGE_SHIFT; /* inode->i_blkbits */
74f68fce AV	24	struct iov_iter to;
	25	struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE};
	26
	27	iov_iter_bvec(&to, ITER_BVEC \| READ, &bv, 1, PAGE_SIZE);
5db11c21 MM	28
5db11c21 MM	29	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	30	"orangefs_readpage called with page %p\n",
5db11c21	31	page);
5db11c21 MM	32
	33	max_block = ((inode->i_size / blocksize) + 1);
	34
	35	if (page->index < max_block) {
	36	loff_t blockptr_offset = (((loff_t) page->index) << blockbits);
	37
8bb8aefd YL	38	bytes_read = orangefs_inode_read(inode,
	39	&to,
	40	&blockptr_offset,
	41	inode->i_size);
5db11c21	42	}
74f68fce AV	43	/* this will only zero remaining unread portions of the page data */
74f68fce AV	44	iov_iter_zero(~0U, &to);
5db11c21 MM	45	/* takes care of potential aliasing */
	46	flush_dcache_page(page);
	47	if (bytes_read < 0) {
	48	ret = bytes_read;
	49	SetPageError(page);
	50	} else {
	51	SetPageUptodate(page);
	52	if (PageError(page))
	53	ClearPageError(page);
	54	ret = 0;
	55	}
5db11c21 MM	56	/* unlock the page after the ->readpage() routine completes */
	57	unlock_page(page);
	58	return ret;
	59	}
	60
8bb8aefd	61	static int orangefs_readpage(struct file file, struct page page)
5db11c21 MM	62	{
	63	return read_one_page(page);
	64	}
	65
8bb8aefd	66	static int orangefs_readpages(struct file *file,
5db11c21 MM	67	struct address_space *mapping,
	68	struct list_head *pages,
	69	unsigned nr_pages)
	70	{
	71	int page_idx;
	72	int ret;
	73
8bb8aefd	74	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_readpages called\n");
5db11c21 MM	75
	76	for (page_idx = 0; page_idx < nr_pages; page_idx++) {
	77	struct page *page;
	78
	79	page = list_entry(pages->prev, struct page, lru);
	80	list_del(&page->lru);
	81	if (!add_to_page_cache(page,
	82	mapping,
	83	page->index,
8a5c743e	84	readahead_gfp_mask(mapping))) {
5db11c21 MM	85	ret = read_one_page(page);
	86	gossip_debug(GOSSIP_INODE_DEBUG,
	87	"failure adding page to cache, read_one_page returned: %d\n",
	88	ret);
	89	} else {
09cbfeaf	90	put_page(page);
5db11c21 MM	91	}
	92	}
	93	BUG_ON(!list_empty(pages));
	94	return 0;
	95	}
	96
8bb8aefd	97	static void orangefs_invalidatepage(struct page *page,
5db11c21 MM	98	unsigned int offset,
	99	unsigned int length)
	100	{
	101	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	102	"orangefs_invalidatepage called on page %p "
5db11c21 MM	103	"(offset is %u)\n",
	104	page,
	105	offset);
	106
	107	ClearPageUptodate(page);
	108	ClearPageMappedToDisk(page);
	109	return;
	110
	111	}
	112
8bb8aefd	113	static int orangefs_releasepage(struct page *page, gfp_t foo)
5db11c21 MM	114	{
5db11c21 MM	115	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	116	"orangefs_releasepage called on page %p\n",
5db11c21 MM	117	page);
	118	return 0;
	119	}
	120
	121	/*
	122	* Having a direct_IO entry point in the address_space_operations
	123	* struct causes the kernel to allows us to use O_DIRECT on
	124	* open. Nothing will ever call this thing, but in the future we
	125	* will need to be able to use O_DIRECT on open in order to support
	126	* AIO. Modeled after NFS, they do this too.
	127	*/
3903f150 MM	128
	129	static ssize_t orangefs_direct_IO(struct kiocb *iocb,
	130	struct iov_iter *iter)
	131	{
	132	gossip_debug(GOSSIP_INODE_DEBUG,
f66debf1 AV	133	"orangefs_direct_IO: %pD\n",
f66debf1 AV	134	iocb->ki_filp);
3903f150 MM	135
	136	return -EINVAL;
	137	}
5db11c21	138
8bb8aefd YL	139	/** ORANGEFS2 implementation of address space operations */
	140	const struct address_space_operations orangefs_address_operations = {
	141	.readpage = orangefs_readpage,
	142	.readpages = orangefs_readpages,
	143	.invalidatepage = orangefs_invalidatepage,
	144	.releasepage = orangefs_releasepage,
3903f150	145	.direct_IO = orangefs_direct_IO,
5db11c21 MM	146	};
5db11c21 MM	147
8bb8aefd	148	static int orangefs_setattr_size(struct inode inode, struct iattr iattr)
5db11c21	149	{
8bb8aefd YL	150	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
8bb8aefd YL	151	struct orangefs_kernel_op_s *new_op;
fecd86aa	152	loff_t orig_size;
5db11c21 MM	153	int ret = -EINVAL;
	154
	155	gossip_debug(GOSSIP_INODE_DEBUG,
	156	"%s: %pU: Handle is %pU \| fs_id %d \| size is %llu\n",
	157	__func__,
	158	get_khandle_from_ino(inode),
8bb8aefd YL	159	&orangefs_inode->refn.khandle,
8bb8aefd YL	160	orangefs_inode->refn.fs_id,
5db11c21 MM	161	iattr->ia_size);
5db11c21 MM	162
fecd86aa MB	163	/* Ensure that we have a up to date size, so we know if it changed. */
	164	ret = orangefs_inode_getattr(inode, 0, 1);
	165	if (ret == -ESTALE)
	166	ret = -EIO;
	167	if (ret) {
	168	gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
	169	__func__, ret);
	170	return ret;
	171	}
	172	orig_size = i_size_read(inode);
	173
5db11c21 MM	174	truncate_setsize(inode, iattr->ia_size);
5db11c21 MM	175
8bb8aefd	176	new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
5db11c21 MM	177	if (!new_op)
	178	return -ENOMEM;
	179
8bb8aefd	180	new_op->upcall.req.truncate.refn = orangefs_inode->refn;
5db11c21 MM	181	new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
	182
	183	ret = service_operation(new_op, __func__,
	184	get_interruptible_flag(inode));
	185
	186	/*
	187	* the truncate has no downcall members to retrieve, but
	188	* the status value tells us if it went through ok or not
	189	*/
	190	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	191	"orangefs: orangefs_truncate got return value of %d\n",
5db11c21 MM	192	ret);
	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,
f66debf1 AV	214	"orangefs_setattr: called on %pd\n",
f66debf1 AV	215	dentry);
5db11c21	216
31051c85	217	ret = setattr_prepare(dentry, iattr);
5db11c21 MM	218	if (ret)
	219	goto out;
	220
	221	if ((iattr->ia_valid & ATTR_SIZE) &&
	222	iattr->ia_size != i_size_read(inode)) {
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
71680c18	259	ret = orangefs_inode_getattr(inode, 0, 0);
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;
5db11c21 MM	266	}
	267	return ret;
	268	}
	269
933287da MB	270	int orangefs_permission(struct inode *inode, int mask)
	271	{
	272	int ret;
	273
	274	if (mask & MAY_NOT_BLOCK)
	275	return -ECHILD;
	276
	277	gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
	278
	279	/* Make sure the permission (and other common attrs) are up to date. */
8f24928d	280	ret = orangefs_inode_getattr(inode, 0, 0);
933287da MB	281	if (ret < 0)
	282	return ret;
	283
	284	return generic_permission(inode, mask);
	285	}
	286
8bb8aefd	287	/* ORANGEDS2 implementation of VFS inode operations for files */
6f3fc107	288	const struct inode_operations orangefs_file_inode_operations = {
8bb8aefd YL	289	.get_acl = orangefs_get_acl,
	290	.set_acl = orangefs_set_acl,
	291	.setattr = orangefs_setattr,
	292	.getattr = orangefs_getattr,
8bb8aefd	293	.listxattr = orangefs_listxattr,
933287da	294	.permission = orangefs_permission,
5db11c21 MM	295	};
5db11c21 MM	296
8bb8aefd	297	static int orangefs_init_iops(struct inode *inode)
5db11c21	298	{
8bb8aefd	299	inode->i_mapping->a_ops = &orangefs_address_operations;
5db11c21 MM	300
	301	switch (inode->i_mode & S_IFMT) {
	302	case S_IFREG:
8bb8aefd YL	303	inode->i_op = &orangefs_file_inode_operations;
8bb8aefd YL	304	inode->i_fop = &orangefs_file_operations;
09cbfeaf	305	inode->i_blkbits = PAGE_SHIFT;
5db11c21 MM	306	break;
5db11c21 MM	307	case S_IFLNK:
8bb8aefd	308	inode->i_op = &orangefs_symlink_inode_operations;
5db11c21 MM	309	break;
5db11c21 MM	310	case S_IFDIR:
8bb8aefd YL	311	inode->i_op = &orangefs_dir_inode_operations;
8bb8aefd YL	312	inode->i_fop = &orangefs_dir_operations;
5db11c21 MM	313	break;
	314	default:
	315	gossip_debug(GOSSIP_INODE_DEBUG,
	316	"%s: unsupported mode\n",
	317	__func__);
	318	return -EINVAL;
	319	}
	320
	321	return 0;
	322	}
	323
	324	/*
8bb8aefd	325	* Given a ORANGEFS object identifier (fsid, handle), convert it into a ino_t type
5db11c21 MM	326	* that will be used as a hash-index from where the handle will
	327	* be searched for in the VFS hash table of inodes.
	328	*/
8bb8aefd	329	static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
5db11c21 MM	330	{
	331	if (!ref)
	332	return 0;
8bb8aefd	333	return orangefs_khandle_to_ino(&(ref->khandle));
5db11c21 MM	334	}
	335
	336	/*
	337	* Called to set up an inode from iget5_locked.
	338	*/
8bb8aefd	339	static int orangefs_set_inode(struct inode inode, void data)
5db11c21	340	{
8bb8aefd	341	struct orangefs_object_kref ref = (struct orangefs_object_kref ) data;
a4c680a0 MB	342	ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
a4c680a0 MB	343	ORANGEFS_I(inode)->refn.khandle = ref->khandle;
5db11c21 MM	344	return 0;
	345	}
	346
	347	/*
	348	* Called to determine if handles match.
	349	*/
8bb8aefd	350	static int orangefs_test_inode(struct inode inode, void data)
5db11c21	351	{
8bb8aefd YL	352	struct orangefs_object_kref ref = (struct orangefs_object_kref ) data;
8bb8aefd YL	353	struct orangefs_inode_s *orangefs_inode = NULL;
5db11c21	354
8bb8aefd YL	355	orangefs_inode = ORANGEFS_I(inode);
	356	return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), &(ref->khandle))
	357	&& orangefs_inode->refn.fs_id == ref->fs_id);
5db11c21 MM	358	}
	359
	360	/*
8bb8aefd	361	* Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
5db11c21 MM	362	* file handle.
	363	*
	364	* @sb: the file system super block instance.
8bb8aefd	365	* @ref: The ORANGEFS object for which we are trying to locate an inode structure.
5db11c21	366	*/
8bb8aefd	367	struct inode orangefs_iget(struct super_block sb, struct orangefs_object_kref *ref)
5db11c21 MM	368	{
	369	struct inode *inode = NULL;
	370	unsigned long hash;
	371	int error;
	372
8bb8aefd YL	373	hash = orangefs_handle_hash(ref);
8bb8aefd YL	374	inode = iget5_locked(sb, hash, orangefs_test_inode, orangefs_set_inode, ref);
5db11c21 MM	375	if (!inode \|\| !(inode->i_state & I_NEW))
	376	return inode;
	377
71680c18	378	error = orangefs_inode_getattr(inode, 1, 1);
5db11c21 MM	379	if (error) {
	380	iget_failed(inode);
	381	return ERR_PTR(error);
	382	}
	383
	384	inode->i_ino = hash; /* needed for stat etc */
8bb8aefd	385	orangefs_init_iops(inode);
5db11c21 MM	386	unlock_new_inode(inode);
	387
	388	gossip_debug(GOSSIP_INODE_DEBUG,
	389	"iget handle %pU, fsid %d hash %ld i_ino %lu\n",
	390	&ref->khandle,
	391	ref->fs_id,
	392	hash,
	393	inode->i_ino);
	394
	395	return inode;
	396	}
	397
	398	/*
	399	* Allocate an inode for a newly created file and insert it into the inode hash.
	400	*/
8bb8aefd YL	401	struct inode orangefs_new_inode(struct super_block sb, struct inode *dir,
8bb8aefd YL	402	int mode, dev_t dev, struct orangefs_object_kref *ref)
5db11c21	403	{
8bb8aefd	404	unsigned long hash = orangefs_handle_hash(ref);
5db11c21 MM	405	struct inode *inode;
	406	int error;
	407
	408	gossip_debug(GOSSIP_INODE_DEBUG,
5253487e MM	409	"%s:(sb is %p \| MAJOR(dev)=%u \| MINOR(dev)=%u mode=%o)\n",
5253487e MM	410	__func__,
5db11c21 MM	411	sb,
	412	MAJOR(dev),
	413	MINOR(dev),
	414	mode);
	415
	416	inode = new_inode(sb);
	417	if (!inode)
	418	return NULL;
	419
8bb8aefd	420	orangefs_set_inode(inode, ref);
5db11c21 MM	421	inode->i_ino = hash; /* needed for stat etc */
5db11c21 MM	422
71680c18	423	error = orangefs_inode_getattr(inode, 1, 1);
5db11c21 MM	424	if (error)
	425	goto out_iput;
	426
8bb8aefd	427	orangefs_init_iops(inode);
5db11c21 MM	428
	429	inode->i_mode = mode;
	430	inode->i_uid = current_fsuid();
	431	inode->i_gid = current_fsgid();
078cd827	432	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
09cbfeaf	433	inode->i_size = PAGE_SIZE;
5db11c21 MM	434	inode->i_rdev = dev;
5db11c21 MM	435
8bb8aefd	436	error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
5db11c21 MM	437	if (error < 0)
	438	goto out_iput;
	439
	440	gossip_debug(GOSSIP_INODE_DEBUG,
	441	"Initializing ACL's for inode %pU\n",
	442	get_khandle_from_ino(inode));
8bb8aefd	443	orangefs_init_acl(inode, dir);
5db11c21 MM	444	return inode;
	445
	446	out_iput:
	447	iput(inode);
	448	return ERR_PTR(error);
	449	}