drivers/block/drbd/drbd_interval.h
Source file repositories/reference/linux-study-clean/drivers/block/drbd/drbd_interval.h
File Facts
- System
- Linux kernel
- Corpus path
drivers/block/drbd/drbd_interval.h- Extension
.h- Size
- 1522 bytes
- Lines
- 47
- Domain
- Driver Families
- Bucket
- drivers/block
- Inferred role
- Driver Families: implementation source
- Status
- source 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/types.hlinux/rbtree.h
Detected Declarations
struct drbd_intervalfunction drbd_clear_intervalfunction drbd_interval_empty
Annotated Snippet
struct drbd_interval {
struct rb_node rb;
sector_t sector; /* start sector of the interval */
sector_t end; /* highest interval end in subtree */
unsigned int size; /* size in bytes */
unsigned int local:1 /* local or remote request? */;
unsigned int waiting:1; /* someone is waiting for completion */
unsigned int completed:1; /* this has been completed already;
* ignore for conflict detection */
/* to resume a partially successful drbd_al_begin_io_nonblock(); */
unsigned int partially_in_al_next_enr;
};
static inline void drbd_clear_interval(struct drbd_interval *i)
{
RB_CLEAR_NODE(&i->rb);
}
static inline bool drbd_interval_empty(struct drbd_interval *i)
{
return RB_EMPTY_NODE(&i->rb);
}
extern bool drbd_insert_interval(struct rb_root *, struct drbd_interval *);
extern bool drbd_contains_interval(struct rb_root *, sector_t,
struct drbd_interval *);
extern void drbd_remove_interval(struct rb_root *, struct drbd_interval *);
extern struct drbd_interval *drbd_find_overlap(struct rb_root *, sector_t,
unsigned int);
extern struct drbd_interval *drbd_next_overlap(struct drbd_interval *, sector_t,
unsigned int);
#define drbd_for_each_overlap(i, root, sector, size) \
for (i = drbd_find_overlap(root, sector, size); \
i; \
i = drbd_next_overlap(i, sector, size))
#endif /* __DRBD_INTERVAL_H */
Annotation
- Immediate include surface: `linux/types.h`, `linux/rbtree.h`.
- Detected declarations: `struct drbd_interval`, `function drbd_clear_interval`, `function drbd_interval_empty`.
- Atlas domain: Driver Families / drivers/block.
- Implementation status: source implementation candidate.
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.