1 /* 2 * linux/fs/ext2/file.c 3 * 4 * Copyright (C) 1992, 1993, 1994, 1995 5 * Remy Card (card@masi.ibp.fr) 6 * Laboratoire MASI - Institut Blaise Pascal 7 * Universite Pierre et Marie Curie (Paris VI) 8 * 9 * from 10 * 11 * linux/fs/minix/file.c 12 * 13 * Copyright (C) 1991, 1992 Linus Torvalds 14 * 15 * ext2 fs regular file handling primitives 16 * 17 * 64-bit file support on 64-bit platforms by Jakub Jelinek 18 * (jj@sunsite.ms.mff.cuni.cz) 19 */ 20 21 #include <linux/time.h> 22 #include <linux/pagemap.h> 23 #include "ext2.h" 24 #include "xattr.h" 25 #include "acl.h" 26 27 /* 28 * Called when filp is released. This happens when all file descriptors 29 * for a single struct file are closed. Note that different open() calls 30 * for the same file yield different struct file structures. 31 */ 32 static int ext2_release_file (struct inode * inode, struct file * filp) 33 { 34 if (filp->f_mode & FMODE_WRITE) { 35 mutex_lock(&EXT2_I(inode)->truncate_mutex); 36 ext2_discard_reservation(inode); 37 mutex_unlock(&EXT2_I(inode)->truncate_mutex); 38 } 39 return 0; 40 } 41 42 int ext2_fsync(struct file *file, struct dentry *dentry, int datasync) 43 { 44 int ret; 45 struct super_block *sb = dentry->d_inode->i_sb; 46 struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping; 47 48 ret = simple_fsync(file, dentry, datasync); 49 if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) { 50 /* We don't really know where the IO error happened... */ 51 ext2_error(sb, __func__, 52 "detected IO error when writing metadata buffers"); 53 ret = -EIO; 54 } 55 return ret; 56 } 57 58 /* 59 * We have mostly NULL's here: the current defaults are ok for 60 * the ext2 filesystem. 61 */ 62 const struct file_operations ext2_file_operations = { 63 .llseek = generic_file_llseek, 64 .read = do_sync_read, 65 .write = do_sync_write, 66 .aio_read = generic_file_aio_read, 67 .aio_write = generic_file_aio_write, 68 .unlocked_ioctl = ext2_ioctl, 69 #ifdef CONFIG_COMPAT 70 .compat_ioctl = ext2_compat_ioctl, 71 #endif 72 .mmap = generic_file_mmap, 73 .open = generic_file_open, 74 .release = ext2_release_file, 75 .fsync = ext2_fsync, 76 .splice_read = generic_file_splice_read, 77 .splice_write = generic_file_splice_write, 78 }; 79 80 #ifdef CONFIG_EXT2_FS_XIP 81 const struct file_operations ext2_xip_file_operations = { 82 .llseek = generic_file_llseek, 83 .read = xip_file_read, 84 .write = xip_file_write, 85 .unlocked_ioctl = ext2_ioctl, 86 #ifdef CONFIG_COMPAT 87 .compat_ioctl = ext2_compat_ioctl, 88 #endif 89 .mmap = xip_file_mmap, 90 .open = generic_file_open, 91 .release = ext2_release_file, 92 .fsync = ext2_fsync, 93 }; 94 #endif 95 96 const struct inode_operations ext2_file_inode_operations = { 97 .truncate = ext2_truncate, 98 #ifdef CONFIG_EXT2_FS_XATTR 99 .setxattr = generic_setxattr, 100 .getxattr = generic_getxattr, 101 .listxattr = ext2_listxattr, 102 .removexattr = generic_removexattr, 103 #endif 104 .setattr = ext2_setattr, 105 .check_acl = ext2_check_acl, 106 .fiemap = ext2_fiemap, 107 }; 108