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Annotation of linux/fs/minix/blkdev.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  *  linux/fs/chrdev.c
                      3:  *
                      4:  *  (C) 1991  Linus Torvalds
                      5:  */
                      6: 
                      7: #include <linux/sched.h>
                      8: #include <linux/minix_fs.h>
                      9: #include <linux/tty.h>
                     10: 
                     11: #include <errno.h>
                     12: #include <fcntl.h>
                     13: #include <sys/stat.h>
                     14: 
                     15: /*
                     16:  * Called every time a minix block special file is opened
                     17:  */
                     18: static int blkdev_open(struct inode * inode, struct file * filp)
                     19: {
                     20:        int i;
                     21: 
                     22:        check_disk_change(inode->i_rdev);
                     23:        i = MAJOR(inode->i_rdev);
                     24:        if (i < MAX_BLKDEV) {
                     25:                filp->f_op = blkdev_fops[i];
                     26:                if (filp->f_op && filp->f_op->open)
                     27:                        return filp->f_op->open(inode,filp);
                     28:        }
                     29:        return 0;
                     30: }      
                     31: 
                     32: /*
                     33:  * Dummy default file-operations: the only thing this does
                     34:  * is contain the open that then fills in the correct operations
                     35:  * depending on the special file...
                     36:  */
                     37: static struct file_operations def_blk_fops = {
                     38:        NULL,           /* lseek */
                     39:        NULL,           /* read */
                     40:        NULL,           /* write */
                     41:        NULL,           /* readdir */
                     42:        NULL,           /* select */
                     43:        NULL,           /* ioctl */
                     44:        blkdev_open,    /* open */
                     45:        NULL,           /* release */
                     46: };
                     47: 
                     48: struct inode_operations minix_blkdev_inode_operations = {
                     49:        &def_blk_fops,          /* default file operations */
                     50:        NULL,                   /* create */
                     51:        NULL,                   /* lookup */
                     52:        NULL,                   /* link */
                     53:        NULL,                   /* unlink */
                     54:        NULL,                   /* symlink */
                     55:        NULL,                   /* mkdir */
                     56:        NULL,                   /* rmdir */
                     57:        NULL,                   /* mknod */
                     58:        NULL,                   /* rename */
                     59:        NULL,                   /* readlink */
                     60:        NULL,                   /* follow_link */
                     61:        minix_bmap,             /* bmap */
                     62:        minix_truncate          /* truncate */
                     63: };

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