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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [fs/] [umsdos/] [file.c] - Rev 1777
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/* * 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 <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> #include <asm/segment.h> #include <asm/system.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 = fat_file_read(inode,filp,buf,count); if (!IS_RDONLY(inode)){ 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, const char *buf, int count) { return fat_file_write(inode,filp,buf,count); } /* Truncate a file to 0 length. */ static void UMSDOS_truncate(struct inode *inode) { PRINTK (("UMSDOS_truncate\n")); fat_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_file_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 */ generic_readpage, /* readpage */ NULL, /* writepage */ fat_bmap, /* bmap */ UMSDOS_truncate,/* truncate */ NULL, /* permission */ fat_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 */ fat_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, /* readpage */ NULL, /* writepage */ NULL, /* bmap */ UMSDOS_truncate,/* truncate */ NULL, /* permission */ NULL, /* smap */ };
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