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Annotation of linux/fs/ext/chrdev.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  *  linux/fs/ext/chrdev.c
                      3:  *
                      4:  *  (C) 1992  Remy Card ([email protected])
                      5:  *
                      6:  *  from
                      7:  *
                      8:  *  linux/fs/minix/chrdev.c
                      9:  *
                     10:  *  (C) 1991  Linus Torvalds
                     11:  */
                     12: 
                     13: #include <linux/sched.h>
                     14: #include <linux/ext_fs.h>
                     15: #include <linux/tty.h>
                     16: #include <linux/stat.h>
                     17: #include <linux/fcntl.h>
                     18: 
                     19: #include <errno.h>
                     20: 
                     21: /*
                     22:  * Called every time an ext character special file is opened
                     23:  */
                     24: static int chrdev_open(struct inode * inode, struct file * filp)
                     25: {
                     26:        int i;
                     27: 
                     28:        i = MAJOR(inode->i_rdev);
                     29:        if (i < MAX_CHRDEV) {
                     30:                filp->f_op = chrdev_fops[i];
                     31:                if (filp->f_op && filp->f_op->open)
                     32:                        return filp->f_op->open(inode,filp);
                     33:        }
                     34:        return 0;
                     35: }
                     36: 
                     37: /*
                     38:  * Dummy default file-operations: the only thing this does
                     39:  * is contain the open that then fills in the correct operations
                     40:  * depending on the special file...
                     41:  */
                     42: static struct file_operations def_chr_fops = {
                     43:        NULL,           /* lseek */
                     44:        NULL,           /* read */
                     45:        NULL,           /* write */
                     46:        NULL,           /* readdir */
                     47:        NULL,           /* select */
                     48:        NULL,           /* ioctl */
                     49:        chrdev_open,    /* open */
                     50:        NULL,           /* release */
                     51: };
                     52: 
                     53: struct inode_operations ext_chrdev_inode_operations = {
                     54:        &def_chr_fops,          /* default file operations */
                     55:        NULL,                   /* create */
                     56:        NULL,                   /* lookup */
                     57:        NULL,                   /* link */
                     58:        NULL,                   /* unlink */
                     59:        NULL,                   /* symlink */
                     60:        NULL,                   /* mkdir */
                     61:        NULL,                   /* rmdir */
                     62:        NULL,                   /* mknod */
                     63:        NULL,                   /* rename */
                     64:        NULL,                   /* readlink */
                     65:        NULL,                   /* follow_link */
                     66:        ext_bmap,               /* bmap */
                     67:        ext_truncate            /* truncate */
                     68: };
                     69: 

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