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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | /* * linux/fs/umsdos/file.c * * Written 1993 by Jacques Gelinas * inspired from linux/fs/msdos/file.c Werner Almesberger * * Extended MS-DOS regular file handling primitives */ #include <asm/segment.h> #include <asm/system.h> #include <linux/sched.h> #include <linux/fs.h> #include <linux/msdos_fs.h> #include <linux/errno.h> #include <linux/fcntl.h> #include <linux/stat.h> #include <linux/msdos_fs.h> #include <linux/umsdos_fs.h> #define PRINTK(x) #define Printk(x) printk x /* Read a file into user space memory */ static int UMSDOS_file_read( struct inode *inode, struct file *filp, char *buf, int count) { /* We have to set the access time because msdos don't care */ int ret = msdos_file_read(inode,filp,buf,count); inode->i_atime = CURRENT_TIME; inode->i_dirt = 1; return ret; } /* Write a file from user space memory */ static int UMSDOS_file_write( struct inode *inode, struct file *filp, char *buf, int count) { return msdos_file_write(inode,filp,buf,count); } /* Truncate a file to 0 length. */ static void UMSDOS_truncate(struct inode *inode) { PRINTK (("UMSDOS_truncate\n")); msdos_truncate (inode); inode->i_ctime = inode->i_mtime = CURRENT_TIME; inode->i_dirt = 1; } /* Function for normal file system (512 bytes hardware sector size) */ struct file_operations umsdos_file_operations = { NULL, /* lseek - default */ UMSDOS_file_read, /* read */ UMSDOS_file_write, /* write */ NULL, /* readdir - bad */ NULL, /* select - default */ NULL, /* ioctl - default */ generic_mmap, /* mmap */ NULL, /* no special open is needed */ NULL, /* release */ file_fsync /* fsync */ }; struct inode_operations umsdos_file_inode_operations = { &umsdos_file_operations, /* default file operations */ NULL, /* create */ NULL, /* lookup */ NULL, /* link */ NULL, /* unlink */ NULL, /* symlink */ NULL, /* mkdir */ NULL, /* rmdir */ NULL, /* mknod */ NULL, /* rename */ NULL, /* readlink */ NULL, /* follow_link */ msdos_bmap, /* bmap */ UMSDOS_truncate,/* truncate */ NULL, /* permission */ msdos_smap /* smap */ }; /* For other with larger and unaligned file system */ struct file_operations umsdos_file_operations_no_bmap = { NULL, /* lseek - default */ UMSDOS_file_read, /* read */ UMSDOS_file_write, /* write */ NULL, /* readdir - bad */ NULL, /* select - default */ NULL, /* ioctl - default */ msdos_mmap, /* mmap */ NULL, /* no special open is needed */ NULL, /* release */ file_fsync /* fsync */ }; struct inode_operations umsdos_file_inode_operations_no_bmap = { &umsdos_file_operations_no_bmap, /* default file operations */ NULL, /* create */ NULL, /* lookup */ NULL, /* link */ NULL, /* unlink */ NULL, /* symlink */ NULL, /* mkdir */ NULL, /* rmdir */ NULL, /* mknod */ NULL, /* rename */ NULL, /* readlink */ NULL, /* follow_link */ NULL, /* bmap */ UMSDOS_truncate,/* truncate */ NULL, /* permission */ NULL, /* smap */ }; |