[linux-2.6-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 "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,
				       GFP_KERNEL)) {
			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(int rw,
 *			struct kiocb *iocb,
 *			struct iov_iter *iter,
 *			loff_t offset)
 *{
 *	gossip_debug(GOSSIP_INODE_DEBUG,
 *		     "orangefs_direct_IO: %s\n",
 *		     iocb->ki_filp->f_path.dentry->d_name.name);
 *
 *	return -EINVAL;
 *}
 */

struct backing_dev_info orangefs_backing_dev_info = {
	.name = "orangefs",
	.ra_pages = 0,
	.capabilities = BDI_CAP_NO_ACCT_DIRTY | BDI_CAP_NO_WRITEBACK,
};

/** 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 %s\n",
		     dentry->d_name.name);

	ret = inode_change_ok(inode, 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(struct vfsmount *mnt,
		  struct dentry *dentry,
		  struct kstat *kstat)
{
	int ret = -ENOENT;
	struct inode *inode = dentry->d_inode;
	struct orangefs_inode_s *orangefs_inode = NULL;

	gossip_debug(GOSSIP_INODE_DEBUG,
		     "orangefs_getattr: called on %s\n",
		     dentry->d_name.name);

	ret = orangefs_inode_getattr(inode, 0, 1);
	if (ret == 0) {
		generic_fillattr(inode, kstat);

		/* override block size reported to stat */
		orangefs_inode = ORANGEFS_I(inode);
		kstat->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 */
struct inode_operations orangefs_file_inode_operations = {
	.get_acl = orangefs_get_acl,
	.set_acl = orangefs_set_acl,
	.setattr = orangefs_setattr,
	.getattr = orangefs_getattr,
	.setxattr = generic_setxattr,
	.getxattr = generic_getxattr,
	.listxattr = orangefs_listxattr,
	.removexattr = generic_removexattr,
	.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, 0);
	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, 0);
	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->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
	11	#include "protocol.h"
575e9461 MM	12	#include "orangefs-kernel.h"
575e9461 MM	13	#include "orangefs-bufmap.h"
5db11c21 MM	14
	15	static int read_one_page(struct page *page)
	16	{
5db11c21 MM	17	int ret;
	18	int max_block;
	19	ssize_t bytes_read = 0;
	20	struct inode *inode = page->mapping->host;
09cbfeaf KS	21	const __u32 blocksize = PAGE_SIZE; /* inode->i_blksize */
09cbfeaf KS	22	const __u32 blockbits = PAGE_SHIFT; /* inode->i_blkbits */
74f68fce AV	23	struct iov_iter to;
	24	struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE};
	25
	26	iov_iter_bvec(&to, ITER_BVEC \| READ, &bv, 1, PAGE_SIZE);
5db11c21 MM	27
5db11c21 MM	28	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	29	"orangefs_readpage called with page %p\n",
5db11c21	30	page);
5db11c21 MM	31
	32	max_block = ((inode->i_size / blocksize) + 1);
	33
	34	if (page->index < max_block) {
	35	loff_t blockptr_offset = (((loff_t) page->index) << blockbits);
	36
8bb8aefd YL	37	bytes_read = orangefs_inode_read(inode,
	38	&to,
	39	&blockptr_offset,
	40	inode->i_size);
5db11c21	41	}
74f68fce AV	42	/* this will only zero remaining unread portions of the page data */
74f68fce AV	43	iov_iter_zero(~0U, &to);
5db11c21 MM	44	/* takes care of potential aliasing */
	45	flush_dcache_page(page);
	46	if (bytes_read < 0) {
	47	ret = bytes_read;
	48	SetPageError(page);
	49	} else {
	50	SetPageUptodate(page);
	51	if (PageError(page))
	52	ClearPageError(page);
	53	ret = 0;
	54	}
5db11c21 MM	55	/* unlock the page after the ->readpage() routine completes */
	56	unlock_page(page);
	57	return ret;
	58	}
	59
8bb8aefd	60	static int orangefs_readpage(struct file file, struct page page)
5db11c21 MM	61	{
	62	return read_one_page(page);
	63	}
	64
8bb8aefd	65	static int orangefs_readpages(struct file *file,
5db11c21 MM	66	struct address_space *mapping,
	67	struct list_head *pages,
	68	unsigned nr_pages)
	69	{
	70	int page_idx;
	71	int ret;
	72
8bb8aefd	73	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_readpages called\n");
5db11c21 MM	74
	75	for (page_idx = 0; page_idx < nr_pages; page_idx++) {
	76	struct page *page;
	77
	78	page = list_entry(pages->prev, struct page, lru);
	79	list_del(&page->lru);
	80	if (!add_to_page_cache(page,
	81	mapping,
	82	page->index,
	83	GFP_KERNEL)) {
	84	ret = read_one_page(page);
	85	gossip_debug(GOSSIP_INODE_DEBUG,
	86	"failure adding page to cache, read_one_page returned: %d\n",
	87	ret);
	88	} else {
09cbfeaf	89	put_page(page);
5db11c21 MM	90	}
	91	}
	92	BUG_ON(!list_empty(pages));
	93	return 0;
	94	}
	95
8bb8aefd	96	static void orangefs_invalidatepage(struct page *page,
5db11c21 MM	97	unsigned int offset,
	98	unsigned int length)
	99	{
	100	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	101	"orangefs_invalidatepage called on page %p "
5db11c21 MM	102	"(offset is %u)\n",
	103	page,
	104	offset);
	105
	106	ClearPageUptodate(page);
	107	ClearPageMappedToDisk(page);
	108	return;
	109
	110	}
	111
8bb8aefd	112	static int orangefs_releasepage(struct page *page, gfp_t foo)
5db11c21 MM	113	{
5db11c21 MM	114	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	115	"orangefs_releasepage called on page %p\n",
5db11c21 MM	116	page);
	117	return 0;
	118	}
	119
	120	/*
	121	* Having a direct_IO entry point in the address_space_operations
	122	* struct causes the kernel to allows us to use O_DIRECT on
	123	* open. Nothing will ever call this thing, but in the future we
	124	* will need to be able to use O_DIRECT on open in order to support
	125	* AIO. Modeled after NFS, they do this too.
	126	*/
	127	/*
575e9461	128	* static ssize_t orangefs_direct_IO(int rw,
54804949 MM	129	* struct kiocb *iocb,
	130	* struct iov_iter *iter,
	131	* loff_t offset)
	132	*{
	133	* gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	134	* "orangefs_direct_IO: %s\n",
54804949 MM	135	* iocb->ki_filp->f_path.dentry->d_name.name);
	136	*
	137	* return -EINVAL;
	138	*}
	139	*/
5db11c21	140
8bb8aefd YL	141	struct backing_dev_info orangefs_backing_dev_info = {
8bb8aefd YL	142	.name = "orangefs",
5db11c21 MM	143	.ra_pages = 0,
	144	.capabilities = BDI_CAP_NO_ACCT_DIRTY \| BDI_CAP_NO_WRITEBACK,
	145	};
	146
8bb8aefd YL	147	/** ORANGEFS2 implementation of address space operations */
	148	const struct address_space_operations orangefs_address_operations = {
	149	.readpage = orangefs_readpage,
	150	.readpages = orangefs_readpages,
	151	.invalidatepage = orangefs_invalidatepage,
	152	.releasepage = orangefs_releasepage,
575e9461	153	/* .direct_IO = orangefs_direct_IO */
5db11c21 MM	154	};
5db11c21 MM	155
8bb8aefd	156	static int orangefs_setattr_size(struct inode inode, struct iattr iattr)
5db11c21	157	{
8bb8aefd YL	158	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
8bb8aefd YL	159	struct orangefs_kernel_op_s *new_op;
fecd86aa	160	loff_t orig_size;
5db11c21 MM	161	int ret = -EINVAL;
	162
	163	gossip_debug(GOSSIP_INODE_DEBUG,
	164	"%s: %pU: Handle is %pU \| fs_id %d \| size is %llu\n",
	165	__func__,
	166	get_khandle_from_ino(inode),
8bb8aefd YL	167	&orangefs_inode->refn.khandle,
8bb8aefd YL	168	orangefs_inode->refn.fs_id,
5db11c21 MM	169	iattr->ia_size);
5db11c21 MM	170
fecd86aa MB	171	/* Ensure that we have a up to date size, so we know if it changed. */
	172	ret = orangefs_inode_getattr(inode, 0, 1);
	173	if (ret == -ESTALE)
	174	ret = -EIO;
	175	if (ret) {
	176	gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
	177	__func__, ret);
	178	return ret;
	179	}
	180	orig_size = i_size_read(inode);
	181
5db11c21 MM	182	truncate_setsize(inode, iattr->ia_size);
5db11c21 MM	183
8bb8aefd	184	new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
5db11c21 MM	185	if (!new_op)
	186	return -ENOMEM;
	187
8bb8aefd	188	new_op->upcall.req.truncate.refn = orangefs_inode->refn;
5db11c21 MM	189	new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
	190
	191	ret = service_operation(new_op, __func__,
	192	get_interruptible_flag(inode));
	193
	194	/*
	195	* the truncate has no downcall members to retrieve, but
	196	* the status value tells us if it went through ok or not
	197	*/
	198	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	199	"orangefs: orangefs_truncate got return value of %d\n",
5db11c21 MM	200	ret);
	201
	202	op_release(new_op);
	203
	204	if (ret != 0)
	205	return ret;
	206
f83140c1	207	if (orig_size != i_size_read(inode))
5db11c21	208	iattr->ia_valid \|= ATTR_CTIME \| ATTR_MTIME;
5db11c21 MM	209
	210	return ret;
	211	}
	212
	213	/*
	214	* Change attributes of an object referenced by dentry.
	215	*/
8bb8aefd	216	int orangefs_setattr(struct dentry dentry, struct iattr iattr)
5db11c21 MM	217	{
	218	int ret = -EINVAL;
	219	struct inode *inode = dentry->d_inode;
	220
	221	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	222	"orangefs_setattr: called on %s\n",
5db11c21 MM	223	dentry->d_name.name);
	224
	225	ret = inode_change_ok(inode, iattr);
	226	if (ret)
	227	goto out;
	228
	229	if ((iattr->ia_valid & ATTR_SIZE) &&
	230	iattr->ia_size != i_size_read(inode)) {
8bb8aefd	231	ret = orangefs_setattr_size(inode, iattr);
5db11c21 MM	232	if (ret)
	233	goto out;
	234	}
	235
	236	setattr_copy(inode, iattr);
	237	mark_inode_dirty(inode);
	238
8bb8aefd	239	ret = orangefs_inode_setattr(inode, iattr);
5db11c21	240	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	241	"orangefs_setattr: inode_setattr returned %d\n",
5db11c21 MM	242	ret);
	243
	244	if (!ret && (iattr->ia_valid & ATTR_MODE))
	245	/* change mod on a file that has ACLs */
	246	ret = posix_acl_chmod(inode, inode->i_mode);
	247
	248	out:
8bb8aefd	249	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", ret);
5db11c21 MM	250	return ret;
	251	}
	252
	253	/*
	254	* Obtain attributes of an object given a dentry
	255	*/
8bb8aefd	256	int orangefs_getattr(struct vfsmount *mnt,
5db11c21 MM	257	struct dentry *dentry,
	258	struct kstat *kstat)
	259	{
	260	int ret = -ENOENT;
	261	struct inode *inode = dentry->d_inode;
8bb8aefd	262	struct orangefs_inode_s *orangefs_inode = NULL;
5db11c21 MM	263
5db11c21 MM	264	gossip_debug(GOSSIP_INODE_DEBUG,
8bb8aefd	265	"orangefs_getattr: called on %s\n",
5db11c21 MM	266	dentry->d_name.name);
5db11c21 MM	267
8f24928d	268	ret = orangefs_inode_getattr(inode, 0, 1);
5db11c21 MM	269	if (ret == 0) {
5db11c21 MM	270	generic_fillattr(inode, kstat);
a7d3e78a	271
5db11c21	272	/* override block size reported to stat */
8bb8aefd YL	273	orangefs_inode = ORANGEFS_I(inode);
8bb8aefd YL	274	kstat->blksize = orangefs_inode->blksize;
5db11c21 MM	275	}
	276	return ret;
	277	}
	278
933287da MB	279	int orangefs_permission(struct inode *inode, int mask)
	280	{
	281	int ret;
	282
	283	if (mask & MAY_NOT_BLOCK)
	284	return -ECHILD;
	285
	286	gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
	287
	288	/* Make sure the permission (and other common attrs) are up to date. */
8f24928d	289	ret = orangefs_inode_getattr(inode, 0, 0);
933287da MB	290	if (ret < 0)
	291	return ret;
	292
	293	return generic_permission(inode, mask);
	294	}
	295
8bb8aefd YL	296	/* ORANGEDS2 implementation of VFS inode operations for files */
	297	struct inode_operations orangefs_file_inode_operations = {
	298	.get_acl = orangefs_get_acl,
	299	.set_acl = orangefs_set_acl,
	300	.setattr = orangefs_setattr,
	301	.getattr = orangefs_getattr,
5db11c21 MM	302	.setxattr = generic_setxattr,
5db11c21 MM	303	.getxattr = generic_getxattr,
8bb8aefd	304	.listxattr = orangefs_listxattr,
5db11c21	305	.removexattr = generic_removexattr,
933287da	306	.permission = orangefs_permission,
5db11c21 MM	307	};
5db11c21 MM	308
8bb8aefd	309	static int orangefs_init_iops(struct inode *inode)
5db11c21	310	{
8bb8aefd	311	inode->i_mapping->a_ops = &orangefs_address_operations;
5db11c21 MM	312
	313	switch (inode->i_mode & S_IFMT) {
	314	case S_IFREG:
8bb8aefd YL	315	inode->i_op = &orangefs_file_inode_operations;
8bb8aefd YL	316	inode->i_fop = &orangefs_file_operations;
09cbfeaf	317	inode->i_blkbits = PAGE_SHIFT;
5db11c21 MM	318	break;
5db11c21 MM	319	case S_IFLNK:
8bb8aefd	320	inode->i_op = &orangefs_symlink_inode_operations;
5db11c21 MM	321	break;
5db11c21 MM	322	case S_IFDIR:
8bb8aefd YL	323	inode->i_op = &orangefs_dir_inode_operations;
8bb8aefd YL	324	inode->i_fop = &orangefs_dir_operations;
5db11c21 MM	325	break;
	326	default:
	327	gossip_debug(GOSSIP_INODE_DEBUG,
	328	"%s: unsupported mode\n",
	329	__func__);
	330	return -EINVAL;
	331	}
	332
	333	return 0;
	334	}
	335
	336	/*
8bb8aefd	337	* Given a ORANGEFS object identifier (fsid, handle), convert it into a ino_t type
5db11c21 MM	338	* that will be used as a hash-index from where the handle will
	339	* be searched for in the VFS hash table of inodes.
	340	*/
8bb8aefd	341	static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
5db11c21 MM	342	{
	343	if (!ref)
	344	return 0;
8bb8aefd	345	return orangefs_khandle_to_ino(&(ref->khandle));
5db11c21 MM	346	}
	347
	348	/*
	349	* Called to set up an inode from iget5_locked.
	350	*/
8bb8aefd	351	static int orangefs_set_inode(struct inode inode, void data)
5db11c21	352	{
8bb8aefd	353	struct orangefs_object_kref ref = (struct orangefs_object_kref ) data;
a4c680a0 MB	354	ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
a4c680a0 MB	355	ORANGEFS_I(inode)->refn.khandle = ref->khandle;
5db11c21 MM	356	return 0;
	357	}
	358
	359	/*
	360	* Called to determine if handles match.
	361	*/
8bb8aefd	362	static int orangefs_test_inode(struct inode inode, void data)
5db11c21	363	{
8bb8aefd YL	364	struct orangefs_object_kref ref = (struct orangefs_object_kref ) data;
8bb8aefd YL	365	struct orangefs_inode_s *orangefs_inode = NULL;
5db11c21	366
8bb8aefd YL	367	orangefs_inode = ORANGEFS_I(inode);
	368	return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), &(ref->khandle))
	369	&& orangefs_inode->refn.fs_id == ref->fs_id);
5db11c21 MM	370	}
	371
	372	/*
8bb8aefd	373	* Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
5db11c21 MM	374	* file handle.
	375	*
	376	* @sb: the file system super block instance.
8bb8aefd	377	* @ref: The ORANGEFS object for which we are trying to locate an inode structure.
5db11c21	378	*/
8bb8aefd	379	struct inode orangefs_iget(struct super_block sb, struct orangefs_object_kref *ref)
5db11c21 MM	380	{
	381	struct inode *inode = NULL;
	382	unsigned long hash;
	383	int error;
	384
8bb8aefd YL	385	hash = orangefs_handle_hash(ref);
8bb8aefd YL	386	inode = iget5_locked(sb, hash, orangefs_test_inode, orangefs_set_inode, ref);
5db11c21 MM	387	if (!inode \|\| !(inode->i_state & I_NEW))
	388	return inode;
	389
075cca50	390	error = orangefs_inode_getattr(inode, 1, 0);
5db11c21 MM	391	if (error) {
	392	iget_failed(inode);
	393	return ERR_PTR(error);
	394	}
	395
	396	inode->i_ino = hash; /* needed for stat etc */
8bb8aefd	397	orangefs_init_iops(inode);
5db11c21 MM	398	unlock_new_inode(inode);
	399
	400	gossip_debug(GOSSIP_INODE_DEBUG,
	401	"iget handle %pU, fsid %d hash %ld i_ino %lu\n",
	402	&ref->khandle,
	403	ref->fs_id,
	404	hash,
	405	inode->i_ino);
	406
	407	return inode;
	408	}
	409
	410	/*
	411	* Allocate an inode for a newly created file and insert it into the inode hash.
	412	*/
8bb8aefd YL	413	struct inode orangefs_new_inode(struct super_block sb, struct inode *dir,
8bb8aefd YL	414	int mode, dev_t dev, struct orangefs_object_kref *ref)
5db11c21	415	{
8bb8aefd	416	unsigned long hash = orangefs_handle_hash(ref);
5db11c21 MM	417	struct inode *inode;
	418	int error;
	419
	420	gossip_debug(GOSSIP_INODE_DEBUG,
5253487e MM	421	"%s:(sb is %p \| MAJOR(dev)=%u \| MINOR(dev)=%u mode=%o)\n",
5253487e MM	422	__func__,
5db11c21 MM	423	sb,
	424	MAJOR(dev),
	425	MINOR(dev),
	426	mode);
	427
	428	inode = new_inode(sb);
	429	if (!inode)
	430	return NULL;
	431
8bb8aefd	432	orangefs_set_inode(inode, ref);
5db11c21 MM	433	inode->i_ino = hash; /* needed for stat etc */
5db11c21 MM	434
075cca50	435	error = orangefs_inode_getattr(inode, 1, 0);
5db11c21 MM	436	if (error)
	437	goto out_iput;
	438
8bb8aefd	439	orangefs_init_iops(inode);
5db11c21 MM	440
	441	inode->i_mode = mode;
	442	inode->i_uid = current_fsuid();
	443	inode->i_gid = current_fsgid();
	444	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
09cbfeaf	445	inode->i_size = PAGE_SIZE;
5db11c21 MM	446	inode->i_rdev = dev;
5db11c21 MM	447
8bb8aefd	448	error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
5db11c21 MM	449	if (error < 0)
	450	goto out_iput;
	451
	452	gossip_debug(GOSSIP_INODE_DEBUG,
	453	"Initializing ACL's for inode %pU\n",
	454	get_khandle_from_ino(inode));
8bb8aefd	455	orangefs_init_acl(inode, dir);
5db11c21 MM	456	return inode;
	457
	458	out_iput:
	459	iput(inode);
	460	return ERR_PTR(error);
	461	}