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NFS: Simplify the nfs_read_completion functions 

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
This commit is contained in:
Trond Myklebust 2012-05-01 12:49:58 -04:00
parent 25b11dcdbf
commit 4bd8b01013
2 changed files with 36 additions and 52 deletions
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46
fs/nfs/direct.c
View File

@ -243,36 +243,28 @@ static void nfs_direct_read_completion(struct nfs_pgio_header *hdr)
dreq->count += hdr->good_bytes;
spin_unlock(&dreq->lock);
if (!test_bit(NFS_IOHDR_ERROR, &hdr->flags)) {
while (!list_empty(&hdr->pages)) {
struct nfs_page *req = nfs_list_entry(hdr->pages.next);
struct page *page = req->wb_page;
while (!list_empty(&hdr->pages)) {
struct nfs_page *req = nfs_list_entry(hdr->pages.next);
struct page *page = req->wb_page;
if (test_bit(NFS_IOHDR_EOF, &hdr->flags)) {
if (bytes > hdr->good_bytes)
zero_user(page, 0, PAGE_SIZE);
else if (hdr->good_bytes - bytes < PAGE_SIZE)
zero_user_segment(page,
hdr->good_bytes & ~PAGE_MASK,
PAGE_SIZE);
}
bytes += req->wb_bytes;
nfs_list_remove_request(req);
if (!PageCompound(page))
if (test_bit(NFS_IOHDR_EOF, &hdr->flags)) {
if (bytes > hdr->good_bytes)
zero_user(page, 0, PAGE_SIZE);
else if (hdr->good_bytes - bytes < PAGE_SIZE)
zero_user_segment(page,
hdr->good_bytes & ~PAGE_MASK,
PAGE_SIZE);
}
if (!PageCompound(page)) {
if (test_bit(NFS_IOHDR_ERROR, &hdr->flags)) {
if (bytes < hdr->good_bytes)
set_page_dirty(page);
} else
set_page_dirty(page);
nfs_direct_readpage_release(req);
}
} else {
while (!list_empty(&hdr->pages)) {
struct nfs_page *req = nfs_list_entry(hdr->pages.next);
if (bytes < hdr->good_bytes)
if (!PageCompound(req->wb_page))
set_page_dirty(req->wb_page);
bytes += req->wb_bytes;
nfs_list_remove_request(req);
nfs_direct_readpage_release(req);
}
bytes += req->wb_bytes;
nfs_list_remove_request(req);
nfs_direct_readpage_release(req);
}
out_put:
if (put_dreq(dreq))

42
fs/nfs/read.c
View File

@ -179,34 +179,26 @@ static void nfs_read_completion(struct nfs_pgio_header *hdr)
if (test_bit(NFS_IOHDR_REDO, &hdr->flags))
goto out;
if (!test_bit(NFS_IOHDR_ERROR, &hdr->flags)) {
while (!list_empty(&hdr->pages)) {
struct nfs_page *req = nfs_list_entry(hdr->pages.next);
struct page *page = req->wb_page;
while (!list_empty(&hdr->pages)) {
struct nfs_page *req = nfs_list_entry(hdr->pages.next);
struct page *page = req->wb_page;
if (test_bit(NFS_IOHDR_EOF, &hdr->flags)) {
if (bytes > hdr->good_bytes)
zero_user(page, 0, PAGE_SIZE);
else if (hdr->good_bytes - bytes < PAGE_SIZE)
zero_user_segment(page,
hdr->good_bytes & ~PAGE_MASK,
PAGE_SIZE);
}
SetPageUptodate(page);
nfs_list_remove_request(req);
nfs_readpage_release(req);
bytes += PAGE_SIZE;
if (test_bit(NFS_IOHDR_EOF, &hdr->flags)) {
if (bytes > hdr->good_bytes)
zero_user(page, 0, PAGE_SIZE);
else if (hdr->good_bytes - bytes < PAGE_SIZE)
zero_user_segment(page,
hdr->good_bytes & ~PAGE_MASK,
PAGE_SIZE);
}
} else {
while (!list_empty(&hdr->pages)) {
struct nfs_page *req = nfs_list_entry(hdr->pages.next);
bytes += req->wb_bytes;
bytes += req->wb_bytes;
if (test_bit(NFS_IOHDR_ERROR, &hdr->flags)) {
if (bytes <= hdr->good_bytes)
SetPageUptodate(req->wb_page);
nfs_list_remove_request(req);
nfs_readpage_release(req);
}
SetPageUptodate(page);
} else
SetPageUptodate(page);
nfs_list_remove_request(req);
nfs_readpage_release(req);
}
out:
hdr->release(hdr);