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NFS: create common routine for allocating nfs_direct_req 

Factor out a small common piece of the path that allocate nfs_direct_req
structures.

Test plan:
Compile kernel with CONFIG_NFS and CONFIG_NFS_DIRECTIO enabled.

Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2006-03-20 13:44:31 -05:00 committed by Trond Myklebust
parent bc0fb201b3
commit 93619e5989
1 changed files with 19 additions and 8 deletions
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27
fs/nfs/direct.c
View File

@ -152,6 +152,24 @@ static void nfs_free_user_pages(struct page **pages, int npages, int do_dirty)
kfree(pages); kfree(pages);
} }
static inline struct nfs_direct_req *nfs_direct_req_alloc(void)
{
struct nfs_direct_req *dreq;
dreq = kmem_cache_alloc(nfs_direct_cachep, SLAB_KERNEL);
if (!dreq)
return NULL;
kref_init(&dreq->kref);
init_waitqueue_head(&dreq->wait);
INIT_LIST_HEAD(&dreq->list);
dreq->iocb = NULL;
atomic_set(&dreq->count, 0);
atomic_set(&dreq->error, 0);
return dreq;
}
static void nfs_direct_req_release(struct kref *kref) static void nfs_direct_req_release(struct kref *kref)
{ {
struct nfs_direct_req *dreq = container_of(kref, struct nfs_direct_req, kref); struct nfs_direct_req *dreq = container_of(kref, struct nfs_direct_req, kref);
@ -194,17 +212,10 @@ static struct nfs_direct_req *nfs_direct_read_alloc(size_t nbytes, size_t rsize)
unsigned int reads = 0; unsigned int reads = 0;
unsigned int rpages = (rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; unsigned int rpages = (rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
dreq = kmem_cache_alloc(nfs_direct_cachep, SLAB_KERNEL); dreq = nfs_direct_req_alloc();
if (!dreq) if (!dreq)
return NULL; return NULL;
kref_init(&dreq->kref);
init_waitqueue_head(&dreq->wait);
INIT_LIST_HEAD(&dreq->list);
dreq->iocb = NULL;
atomic_set(&dreq->count, 0);
atomic_set(&dreq->error, 0);
list = &dreq->list; list = &dreq->list;
for(;;) { for(;;) {
struct nfs_read_data *data = nfs_readdata_alloc(rpages); struct nfs_read_data *data = nfs_readdata_alloc(rpages);