drivers/target/target_core_user.c

File Facts

System

Linux kernel

Corpus path

drivers/target/target_core_user.c

Extension

.c

Size

88296 bytes

Lines

3404

Domain

Driver Families

Bucket

drivers/target

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.
• 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/spinlock.h
• linux/module.h
• linux/kernel.h
• linux/timer.h
• linux/parser.h
• linux/vmalloc.h
• linux/uio_driver.h
• linux/xarray.h
• linux/stringify.h
• linux/bitops.h
• linux/highmem.h
• linux/configfs.h
• linux/mutex.h
• linux/workqueue.h
• linux/pagemap.h
• net/genetlink.h
• scsi/scsi_common.h
• scsi/scsi_proto.h
• target/target_core_base.h
• target/target_core_fabric.h
• target/target_core_backend.h
• linux/target_core_user.h

Detected Declarations

• struct tcmu_hba
• struct tcmu_dev
• struct tcmu_nl_cmd
• struct tcmu_dev
• struct tcmu_cmd
• struct tcmu_tmr
• enum tcmu_multicast_groups
• function tcmu_set_global_max_data_area
• function tcmu_get_global_max_data_area
• function tcmu_get_block_netlink
• function tcmu_set_block_netlink
• function tcmu_fail_netlink_cmd
• function tcmu_set_reset_netlink
• function tcmu_genl_cmd_done
• function tcmu_genl_rm_dev_done
• function tcmu_genl_add_dev_done
• function tcmu_genl_reconfig_dev_done
• function tcmu_genl_set_features
• function tcmu_cmd_free_data
• function tcmu_get_empty_block
• function tcmu_get_empty_blocks
• function tcmu_free_cmd
• function tcmu_cmd_set_block_cnts
• function new_block_to_iov
• function tcmu_setup_iovs
• function tcmu_flush_dcache_range
• function spc_used
• function spc_free
• function head_to_end
• function tcmu_copy_data
• function scatter_data_area
• function gather_data_area
• function spc_bitmap_free
• function is_ring_space_avail
• function tcmu_alloc_data_space
• function tcmu_cmd_get_base_cmd_size
• function tcmu_cmd_get_cmd_size
• function tcmu_setup_cmd_timer
• function add_to_qfull_queue
• function ring_insert_padding
• function tcmu_unplug_device
• function queue_cmd_ring
• function queue_tmr_ring
• function tcmu_queue_cmd
• function tcmu_set_next_deadline
• function tcmu_tmr_type
• function tcmu_tmr_notify
• function list_for_each_entry

Annotated Snippet

module_init(tcmu_module_init);
module_exit(tcmu_module_exit);

Annotation

• Immediate include surface: `linux/spinlock.h`, `linux/module.h`, `linux/kernel.h`, `linux/timer.h`, `linux/parser.h`, `linux/vmalloc.h`, `linux/uio_driver.h`, `linux/xarray.h`.
• Detected declarations: `struct tcmu_hba`, `struct tcmu_dev`, `struct tcmu_nl_cmd`, `struct tcmu_dev`, `struct tcmu_cmd`, `struct tcmu_tmr`, `enum tcmu_multicast_groups`, `function tcmu_set_global_max_data_area`, `function tcmu_get_global_max_data_area`, `function tcmu_get_block_netlink`.
• Atlas domain: Driver Families / drivers/target.
• Implementation status: integration implementation candidate.
• 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.