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Annotation of linux/fs/ext/blkdev.c, revision 1.1.1.3

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

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