drivers/s390/block/dasd_eckd.c

File Facts

System

Linux kernel

Corpus path

drivers/s390/block/dasd_eckd.c

Extension

.c

Size

193234 bytes

Lines

6977

Domain

Driver Families

Bucket

drivers/s390

Inferred role

Driver Families: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/stddef.h
• linux/kernel.h
• linux/slab.h
• linux/hdreg.h
• linux/bio.h
• linux/module.h
• linux/init.h
• linux/seq_file.h
• linux/uaccess.h
• linux/io.h
• asm/css_chars.h
• asm/machine.h
• asm/debug.h
• asm/idals.h
• asm/ebcdic.h
• asm/cio.h
• asm/ccwdev.h
• asm/itcw.h
• asm/schid.h
• asm/chpid.h
• dasd_int.h
• dasd_eckd.h

Detected Declarations

• struct ext_pool_exhaust_work_data
• struct pe_handler_work_data
• struct check_attention_work_data
• function dasd_eckd_probe
• function dasd_eckd_set_online
• function ceil_quot
• function recs_per_track
• function set_ch_t
• function dasd_eckd_track_from_irb
• function set_timestamp
• function define_extent
• function locate_record_ext
• function prefix_LRE
• function prefix
• function locate_record
• function dasd_eckd_cdl_special
• function dasd_eckd_cdl_reclen
• function create_uid
• function dasd_eckd_generate_uid
• function dasd_eckd_get_uid
• function dasd_eckd_compare_path_uid
• function dasd_eckd_fill_rcd_cqr
• function read_conf_cb
• function dasd_eckd_read_conf_immediately
• function dasd_eckd_read_conf_lpm
• function dasd_eckd_identify_conf_parts
• function dasd_eckd_path_access
• function dasd_eckd_store_conf_data
• function dasd_eckd_clear_conf_data
• function dasd_eckd_read_fc_security
• function dasd_eckd_get_uid_string
• function dasd_eckd_check_cabling
• function dasd_eckd_read_conf
• function get_fcx_max_data
• function verify_fcx_max_data
• function rebuild_device_uid
• function dasd_eckd_path_available_action
• function do_pe_handler_work
• function dasd_eckd_pe_handler
• function dasd_eckd_reset_path
• function dasd_eckd_read_features
• function dasd_eckd_read_vol_info
• function dasd_eckd_is_ese
• function dasd_eckd_ext_pool_id
• function dasd_eckd_space_configured
• function dasd_eckd_space_allocated
• function dasd_eckd_logical_capacity
• function dasd_eckd_ext_pool_exhaust_work

Annotated Snippet

module_init(dasd_eckd_init);
module_exit(dasd_eckd_cleanup);

Annotation

• Immediate include surface: `linux/stddef.h`, `linux/kernel.h`, `linux/slab.h`, `linux/hdreg.h`, `linux/bio.h`, `linux/module.h`, `linux/init.h`, `linux/seq_file.h`.
• Detected declarations: `struct ext_pool_exhaust_work_data`, `struct pe_handler_work_data`, `struct check_attention_work_data`, `function dasd_eckd_probe`, `function dasd_eckd_set_online`, `function ceil_quot`, `function recs_per_track`, `function set_ch_t`, `function dasd_eckd_track_from_irb`, `function set_timestamp`.
• Atlas domain: Driver Families / drivers/s390.
• Implementation status: integration implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.