diff options
Diffstat (limited to 'libglusterfs/src')
| -rw-r--r-- | libglusterfs/src/iobuf.c | 35 | ||||
| -rw-r--r-- | libglusterfs/src/iobuf.h | 4 |
2 files changed, 39 insertions, 0 deletions
diff --git a/libglusterfs/src/iobuf.c b/libglusterfs/src/iobuf.c index d1eb0acaf5e..17cd68fc206 100644 --- a/libglusterfs/src/iobuf.c +++ b/libglusterfs/src/iobuf.c @@ -679,6 +679,36 @@ unlock: } struct iobuf * +iobuf_get_page_aligned (struct iobuf_pool *iobuf_pool, size_t page_size, + size_t align_size) +{ + size_t req_size = 0; + struct iobuf *iobuf = NULL; + + req_size = page_size; + + if (req_size == 0) { + req_size = iobuf_pool->default_page_size; + } + + iobuf = iobuf_get2 (iobuf_pool, req_size + align_size); + /* If std allocation was used, then free_ptr will be non-NULL. In this + * case, we do not want to modify the original free_ptr. + * On the other hand, if the buf was gotten through the available + * arenas, then we use iobuf->free_ptr to store the original + * pointer to the offset into the mmap'd block of memory and in turn + * reuse iobuf->ptr to hold the page-aligned address. And finally, in + * iobuf_put(), we copy iobuf->free_ptr into iobuf->ptr - back to where + * it was originally when __iobuf_get() returned this iobuf. + */ + if (!iobuf->free_ptr) + iobuf->free_ptr = iobuf->ptr; + iobuf->ptr = GF_ALIGN_BUF (iobuf->ptr, align_size); + + return iobuf; +} + +struct iobuf * iobuf_get (struct iobuf_pool *iobuf_pool) { struct iobuf *iobuf = NULL; @@ -745,6 +775,11 @@ __iobuf_put (struct iobuf *iobuf, struct iobuf_arena *iobuf_arena) list_del_init (&iobuf->list); iobuf_arena->active_cnt--; + if (iobuf->free_ptr) { + iobuf->ptr = iobuf->free_ptr; + iobuf->free_ptr = NULL; + } + list_add (&iobuf->list, &iobuf_arena->passive.list); iobuf_arena->passive_cnt++; diff --git a/libglusterfs/src/iobuf.h b/libglusterfs/src/iobuf.h index 7e5cfe37a28..1578ceb84dd 100644 --- a/libglusterfs/src/iobuf.h +++ b/libglusterfs/src/iobuf.h @@ -169,4 +169,8 @@ void iobuf_stats_dump (struct iobuf_pool *iobuf_pool); struct iobuf * iobuf_get2 (struct iobuf_pool *iobuf_pool, size_t page_size); + +struct iobuf * +iobuf_get_page_aligned (struct iobuf_pool *iobuf_pool, size_t page_size, + size_t align_size); #endif /* !_IOBUF_H_ */ |