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abd_os: break out platform-specific header parts

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Removing the platform #ifdefs from shared headers in favour of
per-platform headers. Makes abd_t much leaner, among other things.

Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #16253
This commit is contained in:
Rob Norris
2024-04-01 15:37:34 +11:00
committed by Tony Hutter
parent c1055d9ffb
commit d8458202ca
14 changed files with 294 additions and 48 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/sys/abd.h
+3 -32
View File
@@ -30,6 +30,7 @@
#include <sys/debug.h>
#include <sys/zfs_refcount.h>
#include <sys/uio.h>
#include <sys/abd_os.h>
#ifdef __cplusplus
extern "C" {
@@ -58,21 +59,8 @@ typedef struct abd {
#endif
kmutex_t abd_mtx;
union {
struct abd_scatter {
uint_t abd_offset;
#if defined(__FreeBSD__) && defined(_KERNEL)
void *abd_chunks[1]; /* actually variable-length */
#else
uint_t abd_nents;
struct scatterlist *abd_sgl;
#endif
} abd_scatter;
struct abd_linear {
void *abd_buf;
#if defined(__linux__) && defined(_KERNEL)
struct scatterlist *abd_sgl; /* for LINEAR_PAGE */
#endif
} abd_linear;
struct abd_scatter abd_scatter;
struct abd_linear abd_linear;
struct abd_gang {
list_t abd_gang_chain;
} abd_gang;
@@ -81,9 +69,6 @@ typedef struct abd {
typedef int abd_iter_func_t(void *buf, size_t len, void *priv);
typedef int abd_iter_func2_t(void *bufa, void *bufb, size_t len, void *priv);
#if defined(__linux__) && defined(_KERNEL)
typedef int abd_iter_page_func_t(struct page *, size_t, size_t, void *);
#endif
extern int zfs_abd_scatter_enabled;
@@ -130,10 +115,6 @@ void abd_release_ownership_of_buf(abd_t *);
int abd_iterate_func(abd_t *, size_t, size_t, abd_iter_func_t *, void *);
int abd_iterate_func2(abd_t *, abd_t *, size_t, size_t, size_t,
abd_iter_func2_t *, void *);
#if defined(__linux__) && defined(_KERNEL)
int abd_iterate_page_func(abd_t *, size_t, size_t, abd_iter_page_func_t *,
void *);
#endif
void abd_copy_off(abd_t *, abd_t *, size_t, size_t, size_t);
void abd_copy_from_buf_off(abd_t *, const void *, size_t, size_t);
void abd_copy_to_buf_off(void *, abd_t *, size_t, size_t);
@@ -220,16 +201,6 @@ abd_get_size(abd_t *abd)
void abd_init(void);
void abd_fini(void);
/*
* Linux ABD bio functions
* Note: these are only needed to support vdev_classic. See comment in
* vdev_disk.c.
*/
#if defined(__linux__) && defined(_KERNEL)
unsigned int abd_bio_map_off(struct bio *, abd_t *, unsigned int, size_t);
unsigned long abd_nr_pages_off(abd_t *, unsigned int, size_t);
#endif
#ifdef __cplusplus
}
#endif
include/sys/abd_impl.h
+1 -13
View File
@@ -28,6 +28,7 @@
#define _ABD_IMPL_H
#include <sys/abd.h>
#include <sys/abd_impl_os.h>
#include <sys/wmsum.h>
#ifdef __cplusplus
@@ -111,19 +112,6 @@ void abd_iter_page(struct abd_iter *);
#define ABD_LINEAR_BUF(abd) (abd->abd_u.abd_linear.abd_buf)
#define ABD_GANG(abd) (abd->abd_u.abd_gang)
#if defined(_KERNEL)
#if defined(__FreeBSD__)
#define abd_enter_critical(flags) critical_enter()
#define abd_exit_critical(flags) critical_exit()
#else
#define abd_enter_critical(flags) local_irq_save(flags)
#define abd_exit_critical(flags) local_irq_restore(flags)
#endif
#else /* !_KERNEL */
#define abd_enter_critical(flags) ((void)0)
#define abd_exit_critical(flags) ((void)0)
#endif
#ifdef __cplusplus
}
#endif