[linux.git] / fs / sysv / file.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  linux/fs/sysv/file.c
 *
 *  minix/file.c
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *
 *  coh/file.c
 *  Copyright (C) 1993  Pascal Haible, Bruno Haible
 *
 *  sysv/file.c
 *  Copyright (C) 1993  Bruno Haible
 *
 *  SystemV/Coherent regular file handling primitives
 */

#include "sysv.h"

/*
 * We have mostly NULLs here: the current defaults are OK for
 * the coh filesystem.
 */
const struct file_operations sysv_file_operations = {
	.llseek		= generic_file_llseek,
	.read_iter	= generic_file_read_iter,
	.write_iter	= generic_file_write_iter,
	.mmap		= generic_file_mmap,
	.fsync		= generic_file_fsync,
	.splice_read	= generic_file_splice_read,
};

static int sysv_setattr(struct dentry *dentry, struct iattr *attr)
{
	struct inode *inode = d_inode(dentry);
	int error;

	error = setattr_prepare(dentry, attr);
	if (error)
		return error;

	if ((attr->ia_valid & ATTR_SIZE) &&
	    attr->ia_size != i_size_read(inode)) {
		error = inode_newsize_ok(inode, attr->ia_size);
		if (error)
			return error;
		truncate_setsize(inode, attr->ia_size);
		sysv_truncate(inode);
	}

	setattr_copy(inode, attr);
	mark_inode_dirty(inode);
	return 0;
}

const struct inode_operations sysv_file_inode_operations = {
	.setattr	= sysv_setattr,
	.getattr	= sysv_getattr,
};
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/*
	3	* linux/fs/sysv/file.c
	4	*
	5	* minix/file.c
	6	* Copyright (C) 1991, 1992 Linus Torvalds
	7	*
	8	* coh/file.c
	9	* Copyright (C) 1993 Pascal Haible, Bruno Haible
	10	*
	11	* sysv/file.c
	12	* Copyright (C) 1993 Bruno Haible
	13	*
	14	* SystemV/Coherent regular file handling primitives
	15	*/
	16
	17	#include "sysv.h"
	18
	19	/*
	20	* We have mostly NULLs here: the current defaults are OK for
	21	* the coh filesystem.
	22	*/
4b6f5d20	23	const struct file_operations sysv_file_operations = {
1da177e4	24	.llseek = generic_file_llseek,
aad4f8bb	25	.read_iter = generic_file_read_iter,
8174202b	26	.write_iter = generic_file_write_iter,
1da177e4	27	.mmap = generic_file_mmap,
1b061d92	28	.fsync = generic_file_fsync,
5ffc4ef4	29	.splice_read = generic_file_splice_read,
1da177e4 LT	30	};
1da177e4 LT	31
d39aae9e CH	32	static int sysv_setattr(struct dentry dentry, struct iattr attr)
d39aae9e CH	33	{
2b0143b5	34	struct inode *inode = d_inode(dentry);
d39aae9e CH	35	int error;
d39aae9e CH	36
31051c85	37	error = setattr_prepare(dentry, attr);
d39aae9e CH	38	if (error)
d39aae9e CH	39	return error;
1025774c CH	40
	41	if ((attr->ia_valid & ATTR_SIZE) &&
	42	attr->ia_size != i_size_read(inode)) {
fa4d62ae	43	error = inode_newsize_ok(inode, attr->ia_size);
1025774c CH	44	if (error)
1025774c CH	45	return error;
fa4d62ae MS	46	truncate_setsize(inode, attr->ia_size);
fa4d62ae MS	47	sysv_truncate(inode);
1025774c CH	48	}
	49
	50	setattr_copy(inode, attr);
	51	mark_inode_dirty(inode);
	52	return 0;
d39aae9e CH	53	}
d39aae9e CH	54
c5ef1c42	55	const struct inode_operations sysv_file_inode_operations = {
d39aae9e	56	.setattr = sysv_setattr,
1da177e4 LT	57	.getattr = sysv_getattr,
1da177e4 LT	58	};