109 строки
2.8 KiB
C
109 строки
2.8 KiB
C
/*
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* linux/fs/ext2/file.c
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*
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* Copyright (C) 1992, 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*
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* from
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*
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* linux/fs/minix/file.c
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* ext2 fs regular file handling primitives
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*
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* 64-bit file support on 64-bit platforms by Jakub Jelinek
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* (jj@sunsite.ms.mff.cuni.cz)
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*/
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#include <linux/time.h>
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#include <linux/pagemap.h>
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#include <linux/quotaops.h>
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#include "ext2.h"
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#include "xattr.h"
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#include "acl.h"
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/*
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* Called when filp is released. This happens when all file descriptors
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* for a single struct file are closed. Note that different open() calls
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* for the same file yield different struct file structures.
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*/
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static int ext2_release_file (struct inode * inode, struct file * filp)
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{
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if (filp->f_mode & FMODE_WRITE) {
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mutex_lock(&EXT2_I(inode)->truncate_mutex);
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ext2_discard_reservation(inode);
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mutex_unlock(&EXT2_I(inode)->truncate_mutex);
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}
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return 0;
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}
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int ext2_fsync(struct file *file, struct dentry *dentry, int datasync)
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{
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int ret;
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struct super_block *sb = dentry->d_inode->i_sb;
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struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
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ret = simple_fsync(file, dentry, datasync);
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if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) {
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/* We don't really know where the IO error happened... */
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ext2_error(sb, __func__,
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"detected IO error when writing metadata buffers");
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ret = -EIO;
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}
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return ret;
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}
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/*
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* We have mostly NULL's here: the current defaults are ok for
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* the ext2 filesystem.
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*/
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const struct file_operations ext2_file_operations = {
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.llseek = generic_file_llseek,
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.read = do_sync_read,
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.write = do_sync_write,
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.aio_read = generic_file_aio_read,
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.aio_write = generic_file_aio_write,
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.unlocked_ioctl = ext2_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = ext2_compat_ioctl,
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#endif
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.mmap = generic_file_mmap,
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.open = dquot_file_open,
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.release = ext2_release_file,
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.fsync = ext2_fsync,
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.splice_read = generic_file_splice_read,
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.splice_write = generic_file_splice_write,
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};
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#ifdef CONFIG_EXT2_FS_XIP
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const struct file_operations ext2_xip_file_operations = {
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.llseek = generic_file_llseek,
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.read = xip_file_read,
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.write = xip_file_write,
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.unlocked_ioctl = ext2_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = ext2_compat_ioctl,
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#endif
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.mmap = xip_file_mmap,
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.open = dquot_file_open,
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.release = ext2_release_file,
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.fsync = ext2_fsync,
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};
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#endif
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const struct inode_operations ext2_file_inode_operations = {
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.truncate = ext2_truncate,
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#ifdef CONFIG_EXT2_FS_XATTR
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.setxattr = generic_setxattr,
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.getxattr = generic_getxattr,
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.listxattr = ext2_listxattr,
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.removexattr = generic_removexattr,
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#endif
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.setattr = ext2_setattr,
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.check_acl = ext2_check_acl,
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.fiemap = ext2_fiemap,
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};
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