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NFS: create struct nfs_page_array

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Both nfs_read_data and nfs_write_data devote several fields which
can be combined into a single shared struct.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Fred Isaman
2012-04-20 14:47:45 -04:00
committed by Trond Myklebust
parent cd841605f7
commit 30dd374f6f
7 changed files with 67 additions and 56 deletions
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40
fs/nfs/direct.c
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@@ -252,11 +252,11 @@ static void nfs_direct_read_release(void *calldata)
} else {
dreq->count += data->res.count;
spin_unlock(&dreq->lock);
nfs_direct_dirty_pages(data->pagevec,
nfs_direct_dirty_pages(data->pages.pagevec,
data->args.pgbase,
data->res.count);
}
nfs_direct_release_pages(data->pagevec, data->npages);
nfs_direct_release_pages(data->pages.pagevec, data->pages.npages);
if (put_dreq(dreq))
nfs_direct_complete(dreq);
@@ -273,8 +273,8 @@ static void nfs_direct_readhdr_release(struct nfs_read_header *rhdr)
{
struct nfs_read_data *data = &rhdr->rpc_data;
if (data->pagevec != data->page_array)
kfree(data->pagevec);
if (data->pages.pagevec != data->pages.page_array)
kfree(data->pages.pagevec);
nfs_readhdr_free(&rhdr->header);
}
@@ -312,6 +312,7 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
do {
struct nfs_read_header *rhdr;
struct nfs_read_data *data;
struct nfs_page_array *pages;
size_t bytes;
pgbase = user_addr & ~PAGE_MASK;
@@ -322,24 +323,25 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
if (unlikely(!rhdr))
break;
data = &rhdr->rpc_data;
pages = &data->pages;
down_read(&current->mm->mmap_sem);
result = get_user_pages(current, current->mm, user_addr,
data->npages, 1, 0, data->pagevec, NULL);
pages->npages, 1, 0, pages->pagevec, NULL);
up_read(&current->mm->mmap_sem);
if (result < 0) {
nfs_direct_readhdr_release(rhdr);
break;
}
if ((unsigned)result < data->npages) {
if ((unsigned)result < pages->npages) {
bytes = result * PAGE_SIZE;
if (bytes <= pgbase) {
nfs_direct_release_pages(data->pagevec, result);
nfs_direct_release_pages(pages->pagevec, result);
nfs_direct_readhdr_release(rhdr);
break;
}
bytes -= pgbase;
data->npages = result;
pages->npages = result;
}
get_dreq(dreq);
@@ -352,7 +354,7 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
data->args.lock_context = dreq->l_ctx;
data->args.offset = pos;
data->args.pgbase = pgbase;
data->args.pages = data->pagevec;
data->args.pages = pages->pagevec;
data->args.count = bytes;
data->res.fattr = &data->fattr;
data->res.eof = 0;
@@ -462,8 +464,8 @@ static void nfs_direct_writehdr_release(struct nfs_write_header *whdr)
{
struct nfs_write_data *data = &whdr->rpc_data;
if (data->pagevec != data->page_array)
kfree(data->pagevec);
if (data->pages.pagevec != data->pages.page_array)
kfree(data->pages.pagevec);
nfs_writehdr_free(&whdr->header);
}
@@ -472,8 +474,10 @@ static void nfs_direct_free_writedata(struct nfs_direct_req *dreq)
while (!list_empty(&dreq->rewrite_list)) {
struct nfs_pgio_header *hdr = list_entry(dreq->rewrite_list.next, struct nfs_pgio_header, pages);
struct nfs_write_header *whdr = container_of(hdr, struct nfs_write_header, header);
struct nfs_page_array *p = &whdr->rpc_data.pages;
list_del(&hdr->pages);
nfs_direct_release_pages(whdr->rpc_data.pagevec, whdr->rpc_data.npages);
nfs_direct_release_pages(p->pagevec, p->npages);
nfs_direct_writehdr_release(whdr);
}
}
@@ -751,6 +755,7 @@ static ssize_t nfs_direct_write_schedule_segment(struct nfs_direct_req *dreq,
do {
struct nfs_write_header *whdr;
struct nfs_write_data *data;
struct nfs_page_array *pages;
size_t bytes;
pgbase = user_addr & ~PAGE_MASK;
@@ -762,24 +767,25 @@ static ssize_t nfs_direct_write_schedule_segment(struct nfs_direct_req *dreq,
break;
data = &whdr->rpc_data;
pages = &data->pages;
down_read(&current->mm->mmap_sem);
result = get_user_pages(current, current->mm, user_addr,
data->npages, 0, 0, data->pagevec, NULL);
pages->npages, 0, 0, pages->pagevec, NULL);
up_read(&current->mm->mmap_sem);
if (result < 0) {
nfs_direct_writehdr_release(whdr);
break;
}
if ((unsigned)result < data->npages) {
if ((unsigned)result < pages->npages) {
bytes = result * PAGE_SIZE;
if (bytes <= pgbase) {
nfs_direct_release_pages(data->pagevec, result);
nfs_direct_release_pages(pages->pagevec, result);
nfs_direct_writehdr_release(whdr);
break;
}
bytes -= pgbase;
data->npages = result;
pages->npages = result;
}
get_dreq(dreq);
@@ -794,7 +800,7 @@ static ssize_t nfs_direct_write_schedule_segment(struct nfs_direct_req *dreq,
data->args.lock_context = dreq->l_ctx;
data->args.offset = pos;
data->args.pgbase = pgbase;
data->args.pages = data->pagevec;
data->args.pages = pages->pagevec;
data->args.count = bytes;
data->args.stable = sync;
data->res.fattr = &data->fattr;