kernel/arch/s390/include/uapi/asm/dasd.h, branch linux-rolling-stable

s390: Fix various typos

2024-10-25T14:03:23Z

Run codespell on arch/s390 and drivers/s390 and fix all typos. Signed-off-by: Heiko Carstens

s390: fix various typos

2023-07-03T09:19:42Z

Fix various typos found with codespell. Signed-off-by: Heiko Carstens Signed-off-by: Alexander Gordeev

s390/dasd: add autoquiesce feature

2023-04-12T01:53:08Z

Add the internal logic to check for autoquiesce triggers and handle them. Quiesce and resume are functions that tell Linux to stop/resume issuing I/Os to a specific DASD. The DASD driver allows a manual quiesce/resume via ioctl. Autoquiesce will define an amount of triggers that will lead to an automatic quiesce if a certain event occurs. There is no automatic resume. All events will be reported via DASD Extended Error Reporting (EER) if configured. Signed-off-by: Stefan Haberland Reviewed-by: Jan Hoeppner Reviewed-by: Halil Pasic Link: https://lore.kernel.org/r/20230405142017.2446986-3-sth@linux.ibm.com Signed-off-by: Jens Axboe

s390/dasd: add ioctl to perform a swap of the drivers copy pair

2022-09-21T14:32:51Z

The newly defined ioctl BIODASDCOPYPAIRSWAP takes a structure that specifies a copy pair that should be swapped. It will call the device discipline function to perform the swap operation. The structure looks as followed: struct dasd_copypair_swap_data_t { char primary[20]; char secondary[20]; __u8 reserved[64]; }; where primary is the old primary device that will be replaced by the secondary device. The old primary will become a secondary device afterwards. Signed-off-by: Stefan Haberland Reviewed-by: Jan Hoeppner Link: https://lore.kernel.org/r/20220920192616.808070-6-sth@linux.ibm.com Signed-off-by: Jens Axboe

s390/dasd: Add new ioctl to release space

2019-07-11T18:39:54Z

Userspace tools might have the need to release space for Extent Space Efficient (ESE) volumes when working with such a device. Provide the necessarry interface for such a task by implementing a new ioctl BIODASDRAS. The ioctl uses the format_data_t data structure for data input: typedef struct format_data_t { unsigned int start_unit; /* from track */ unsigned int stop_unit; /* to track */ unsigned int blksize; /* sectorsize */ unsigned int intensity; } format_data_t; If the intensity is set to 0x40, start_unit and stop_unit are ignored and space for the entire volume is released. Otherwise, if intensity is set to 0, the respective range is released (if possible). Signed-off-by: Jan Höppner Reviewed-by: Stefan Haberland Signed-off-by: Vasily Gorbik

s390/dasd: Add missing intensity definition

2019-07-11T18:39:54Z

The definition for the bit that removes the write permission for record zero when formatting was missing. Add it to complete the list. Signed-off-by: Jan Höppner Reviewed-by: Stefan Haberland Signed-off-by: Vasily Gorbik

s390/dasd: Fix whitespace

2019-07-11T18:39:53Z

Signed-off-by: Jan Höppner Reviewed-by: Stefan Haberland Signed-off-by: Vasily Gorbik

s390/dasd: configurable IFCC handling

2018-02-22T14:31:23Z

Make the behavior in case of constant IFCC/CCC errors configurable. Add a sysfs attribute to switch between path disabled after threshold exceeded (default) and message only. Reviewed-by: Jan Hoeppner Reviewed-by: Sebastian Ott Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky

License cleanup: add SPDX license identifier to uapi header files with no license

2017-11-02T10:19:54Z

Many user space API headers are missing licensing information, which makes it hard for compliance tools to determine the correct license. By default are files without license information under the default license of the kernel, which is GPLV2. Marking them GPLV2 would exclude them from being included in non GPLV2 code, which is obviously not intended. The user space API headers fall under the syscall exception which is in the kernels COPYING file: NOTE! This copyright does *not* cover user programs that use kernel services by normal system calls - this is merely considered normal use of the kernel, and does *not* fall under the heading of "derived work". otherwise syscall usage would not be possible. Update the files which contain no license information with an SPDX license identifier. The chosen identifier is 'GPL-2.0 WITH Linux-syscall-note' which is the officially assigned identifier for the Linux syscall exception. SPDX license identifiers are a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. See the previous patch in this series for the methodology of how this patch was researched. Reviewed-by: Kate Stewart Reviewed-by: Philippe Ombredanne Reviewed-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

s390/dasd: Add discard support for FBA devices

2017-08-29T14:31:26Z

The z/VM hypervisor provides virtual disks (VDISK) which are backed by main memory of the hypervisor. Those devices are seen as DASD FBA disks within the Linux guest. Whenever data is written to such a device, memory is allocated on-the-fly by z/VM accordingly. This memory, however, is not being freed if data on the device is deleted by the guest OS. In order to make memory usable after deletion again, add discard support to the FBA discipline. While at it, update comments regarding the DASD_FEATURE_* flags. Reviewed-by: Stefan Haberland Signed-off-by: Jan Höppner Signed-off-by: Martin Schwidefsky