On 26.12.2016 2:18, Hans Petter Selasky wrote:
> Author: hselasky
> Date: Mon Dec 26 01:18:07 2016
> New Revision: 310559
> URL: https://svnweb.freebsd.org/changeset/base/310559
>
> Log:
> Implement register and unregister chrdev in the LinuxKPI.
>
> Obtained from: kmacy @
> MFC after: 1 week
> Sponsored by: Mellanox Technologies
>
> Modified:
> head/sys/compat/linuxkpi/common/include/linux/cdev.h
> head/sys/compat/linuxkpi/common/include/linux/fs.h
> head/sys/compat/linuxkpi/common/src/linux_compat.c
>
> Modified: head/sys/compat/linuxkpi/common/include/linux/cdev.h
> ==============================================================================
> --- head/sys/compat/linuxkpi/common/include/linux/cdev.h Sun Dec 25
> 22:32:16 2016 (r310558)
> +++ head/sys/compat/linuxkpi/common/include/linux/cdev.h Mon Dec 26
> 01:18:07 2016 (r310559)
> @@ -95,7 +95,7 @@ cdev_add(struct linux_cdev *cdev, dev_t
> args.mda_gid = 0;
> args.mda_mode = 0700;
> args.mda_si_drv1 = cdev;
> - args.mda_unit = MINOR(dev);
> + args.mda_unit = dev;
>
> error = make_dev_s(&args, &cdev->cdev, "%s",
> kobject_name(&cdev->kobj));
> @@ -121,7 +121,7 @@ cdev_add_ext(struct linux_cdev *cdev, de
> args.mda_gid = gid;
> args.mda_mode = mode;
> args.mda_si_drv1 = cdev;
> - args.mda_unit = MINOR(dev);
> + args.mda_unit = dev;
>
> error = make_dev_s(&args, &cdev->cdev, "%s/%d",
> kobject_name(&cdev->kobj), MINOR(dev));
> @@ -142,6 +142,8 @@ cdev_del(struct linux_cdev *cdev)
> kobject_put(&cdev->kobj);
> }
>
> +struct linux_cdev *linux_find_cdev(const char *name, unsigned major,
> unsigned minor);
> +
> #define cdev linux_cdev
>
> #endif /* _LINUX_CDEV_H_ */
>
> Modified: head/sys/compat/linuxkpi/common/include/linux/fs.h
> ==============================================================================
> --- head/sys/compat/linuxkpi/common/include/linux/fs.h Sun Dec 25
> 22:32:16 2016 (r310558)
> +++ head/sys/compat/linuxkpi/common/include/linux/fs.h Mon Dec 26
> 01:18:07 2016 (r310559)
> @@ -2,7 +2,7 @@
> * Copyright (c) 2010 Isilon Systems, Inc.
> * Copyright (c) 2010 iX Systems, Inc.
> * Copyright (c) 2010 Panasas, Inc.
> - * Copyright (c) 2013 Mellanox Technologies, Ltd.
> + * Copyright (c) 2013-2016 Mellanox Technologies, Ltd.
> * All rights reserved.
> *
> * Redistribution and use in source and binary forms, with or without
> @@ -151,6 +151,39 @@ struct file_operations {
> #define FMODE_WRITE FWRITE
> #define FMODE_EXEC FEXEC
>
> +int __register_chrdev(unsigned int major, unsigned int baseminor,
> + unsigned int count, const char *name,
> + const struct file_operations *fops);
> +int __register_chrdev_p(unsigned int major, unsigned int baseminor,
> + unsigned int count, const char *name,
> + const struct file_operations *fops, uid_t uid,
> + gid_t gid, int mode);
> +void __unregister_chrdev(unsigned int major, unsigned int baseminor,
> + unsigned int count, const char *name);
> +
> +static inline void
> +unregister_chrdev(unsigned int major, const char *name)
> +{
> +
> + __unregister_chrdev(major, 0, 256, name);
> +}
> +
> +static inline int
> +register_chrdev(unsigned int major, const char *name,
> + const struct file_operations *fops)
> +{
> +
> + return (__register_chrdev(major, 0, 256, name, fops));
> +}
> +
> +static inline int
> +register_chrdev_p(unsigned int major, const char *name,
> + const struct file_operations *fops, uid_t uid, gid_t gid, int mode)
> +{
> +
> + return (__register_chrdev_p(major, 0, 256, name, fops, uid, gid, mode));
> +}
> +
> static inline int
> register_chrdev_region(dev_t dev, unsigned range, const char *name)
> {
> @@ -184,7 +217,7 @@ static inline dev_t
> iminor(struct inode *inode)
> {
>
> - return dev2unit(inode->v_rdev);
> + return (MINOR(dev2unit(inode->v_rdev)));
This breaks many kernels:
--- all_subdir_ibcore ---
In file included from
/usr2/Meloun/svn/src/sys/modules/ibcore/../../ofed/drivers/infiniband/core/ucma.c:34:
In file included from
/usr2/Meloun/svn/src/sys/modules/ibcore/../../compat/linuxkpi/common/include/linux/file.h:41:
/usr2/Meloun/svn/src/sys/modules/ibcore/../../compat/linuxkpi/common/include/linux/fs.h:220:10:
error: implicit declaration of function 'MINOR' is invalid in C99
[-Werror,-Wimplicit-function-declaration]
return (MINOR(dev2unit(inode->v_rdev)));
^
> }
>
> static inline struct inode *
>
> Modified: head/sys/compat/linuxkpi/common/src/linux_compat.c
> ==============================================================================
> --- head/sys/compat/linuxkpi/common/src/linux_compat.c Sun Dec 25
> 22:32:16 2016 (r310558)
> +++ head/sys/compat/linuxkpi/common/src/linux_compat.c Mon Dec 26
> 01:18:07 2016 (r310559)
> @@ -1418,6 +1418,82 @@ linux_irq_handler(void *ent)
> irqe->handler(irqe->irq, irqe->arg);
> }
>
> +struct linux_cdev *
> +linux_find_cdev(const char *name, unsigned major, unsigned minor)
> +{
> + int unit = MKDEV(major, minor);
> + struct cdev *cdev;
> +
> + dev_lock();
> + LIST_FOREACH(cdev, &linuxcdevsw.d_devs, si_list) {
> + struct linux_cdev *ldev = cdev->si_drv1;
> + if (dev2unit(cdev) == unit &&
> + strcmp(kobject_name(&ldev->kobj), name) == 0) {
> + break;
> + }
> + }
> + dev_unlock();
> +
> + return (cdev != NULL ? cdev->si_drv1 : NULL);
> +}
> +
> +int
> +__register_chrdev(unsigned int major, unsigned int baseminor,
> + unsigned int count, const char *name,
> + const struct file_operations *fops)
> +{
> + struct linux_cdev *cdev;
> + int ret = 0;
> + int i;
> +
> + for (i = baseminor; i < baseminor + count; i++) {
> + cdev = cdev_alloc();
> + cdev_init(cdev, fops);
> + kobject_set_name(&cdev->kobj, name);
> +
> + ret = cdev_add(cdev, makedev(major, i), 1);
> + if (ret != 0)
> + break;
> + }
> + return (ret);
> +}
> +
> +int
> +__register_chrdev_p(unsigned int major, unsigned int baseminor,
> + unsigned int count, const char *name,
> + const struct file_operations *fops, uid_t uid,
> + gid_t gid, int mode)
> +{
> + struct linux_cdev *cdev;
> + int ret = 0;
> + int i;
> +
> + for (i = baseminor; i < baseminor + count; i++) {
> + cdev = cdev_alloc();
> + cdev_init(cdev, fops);
> + kobject_set_name(&cdev->kobj, name);
> +
> + ret = cdev_add_ext(cdev, makedev(major, i), uid, gid, mode);
> + if (ret != 0)
> + break;
> + }
> + return (ret);
> +}
> +
> +void
> +__unregister_chrdev(unsigned int major, unsigned int baseminor,
> + unsigned int count, const char *name)
> +{
> + struct linux_cdev *cdevp;
> + int i;
> +
> + for (i = baseminor; i < baseminor + count; i++) {
> + cdevp = linux_find_cdev(name, major, i);
> + if (cdevp != NULL)
> + cdev_del(cdevp);
> + }
> +}
> +
> #if defined(__i386__) || defined(__amd64__)
> bool linux_cpu_has_clflush;
> #endif
>
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