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Linux/fs/minix/file.c

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  1 // SPDX-License-Identifier: GPL-2.0
  2 /*
  3  *  linux/fs/minix/file.c
  4  *
  5  *  Copyright (C) 1991, 1992 Linus Torvalds
  6  *
  7  *  minix regular file handling primitives
  8  */
  9 
 10 #include "minix.h"
 11 
 12 /*
 13  * We have mostly NULLs here: the current defaults are OK for
 14  * the minix filesystem.
 15  */
 16 const struct file_operations minix_file_operations = {
 17         .llseek         = generic_file_llseek,
 18         .read_iter      = generic_file_read_iter,
 19         .write_iter     = generic_file_write_iter,
 20         .mmap           = generic_file_mmap,
 21         .fsync          = generic_file_fsync,
 22         .splice_read    = generic_file_splice_read,
 23 };
 24 
 25 static int minix_setattr(struct dentry *dentry, struct iattr *attr)
 26 {
 27         struct inode *inode = d_inode(dentry);
 28         int error;
 29 
 30         error = setattr_prepare(dentry, attr);
 31         if (error)
 32                 return error;
 33 
 34         if ((attr->ia_valid & ATTR_SIZE) &&
 35             attr->ia_size != i_size_read(inode)) {
 36                 error = inode_newsize_ok(inode, attr->ia_size);
 37                 if (error)
 38                         return error;
 39 
 40                 truncate_setsize(inode, attr->ia_size);
 41                 minix_truncate(inode);
 42         }
 43 
 44         setattr_copy(inode, attr);
 45         mark_inode_dirty(inode);
 46         return 0;
 47 }
 48 
 49 const struct inode_operations minix_file_inode_operations = {
 50         .setattr        = minix_setattr,
 51         .getattr        = minix_getattr,
 52 };
 53 

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