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 <linux/quotaops.h> 24 #include "ext2.h" 25 #include "xattr.h" 26 #include "acl.h" 27 28 /* 29 * Called when filp is released. This happens when all file descriptors 30 * for a single struct file are closed. Note that different open() calls 31 * for the same file yield different struct file structures. 32 */ 33 static int ext2_release_file (struct inode * inode, struct file * filp) 34 { 35 if (filp->f_mode & FMODE_WRITE) { 36 mutex_lock(&EXT2_I(inode)->truncate_mutex); 37 ext2_discard_reservation(inode); 38 mutex_unlock(&EXT2_I(inode)->truncate_mutex); 39 } 40 return 0; 41 } 42 43 int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync) 44 { 45 int ret; 46 struct super_block *sb = file->f_mapping->host->i_sb; 47 struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping; 48 49 ret = generic_file_fsync(file, start, end, datasync); 50 if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) { 51 /* We don't really know where the IO error happened... */ 52 ext2_error(sb, __func__, 53 "detected IO error when writing metadata buffers"); 54 ret = -EIO; 55 } 56 return ret; 57 } 58 59 /* 60 * We have mostly NULL's here: the current defaults are ok for 61 * the ext2 filesystem. 62 */ 63 const struct file_operations ext2_file_operations = { 64 .llseek = generic_file_llseek, 65 .read = do_sync_read, 66 .write = do_sync_write, 67 .aio_read = generic_file_aio_read, 68 .aio_write = generic_file_aio_write, 69 .unlocked_ioctl = ext2_ioctl, 70 #ifdef CONFIG_COMPAT 71 .compat_ioctl = ext2_compat_ioctl, 72 #endif 73 .mmap = generic_file_mmap, 74 .open = dquot_file_open, 75 .release = ext2_release_file, 76 .fsync = ext2_fsync, 77 .splice_read = generic_file_splice_read, 78 .splice_write = generic_file_splice_write, 79 }; 80 81 #ifdef CONFIG_EXT2_FS_XIP 82 const struct file_operations ext2_xip_file_operations = { 83 .llseek = generic_file_llseek, 84 .read = xip_file_read, 85 .write = xip_file_write, 86 .unlocked_ioctl = ext2_ioctl, 87 #ifdef CONFIG_COMPAT 88 .compat_ioctl = ext2_compat_ioctl, 89 #endif 90 .mmap = xip_file_mmap, 91 .open = dquot_file_open, 92 .release = ext2_release_file, 93 .fsync = ext2_fsync, 94 }; 95 #endif 96 97 const struct inode_operations ext2_file_inode_operations = { 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 .get_acl = ext2_get_acl, 106 .fiemap = ext2_fiemap, 107 }; 108