60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/fs/sysv/file.c
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*
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* minix/file.c
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* coh/file.c
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* Copyright (C) 1993 Pascal Haible, Bruno Haible
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*
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* sysv/file.c
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* Copyright (C) 1993 Bruno Haible
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*
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* SystemV/Coherent regular file handling primitives
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*/
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#include "sysv.h"
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/*
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* We have mostly NULLs here: the current defaults are OK for
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* the coh filesystem.
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*/
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const struct file_operations sysv_file_operations = {
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.llseek = generic_file_llseek,
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.read_iter = generic_file_read_iter,
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.write_iter = generic_file_write_iter,
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.mmap = generic_file_mmap,
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.fsync = generic_file_fsync,
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.splice_read = generic_file_splice_read,
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};
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static int sysv_setattr(struct user_namespace *mnt_userns,
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struct dentry *dentry, struct iattr *attr)
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{
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struct inode *inode = d_inode(dentry);
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int error;
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error = setattr_prepare(&init_user_ns, dentry, attr);
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if (error)
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return error;
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if ((attr->ia_valid & ATTR_SIZE) &&
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attr->ia_size != i_size_read(inode)) {
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error = inode_newsize_ok(inode, attr->ia_size);
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if (error)
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return error;
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truncate_setsize(inode, attr->ia_size);
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sysv_truncate(inode);
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}
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setattr_copy(&init_user_ns, inode, attr);
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mark_inode_dirty(inode);
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return 0;
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}
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const struct inode_operations sysv_file_inode_operations = {
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.setattr = sysv_setattr,
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.getattr = sysv_getattr,
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};
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