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authorPeng Tao <tao.peng@primarydata.com>2014-11-10 08:35:35 +0800
committerTom Haynes <loghyr@primarydata.com>2015-02-03 11:06:48 -0800
commit48d635f14a544c2b3ca870d2c7349b41160496d2 (patch)
tree3482ecc1445a13fb60941213930078da302869ff /fs/nfs/pnfs.c
parent47af81f29556a45493e5c87289c3c16ce911096c (diff)
nfs: add nfs_pgio_current_mirror helper
Let it return current nfs_pgio_mirror in use depending on pg_mirror_count. For read, we always use pg_mirrors[0], so this effectively gives us freedom to use pg_mirror_idx to track the actual mirror to read from through out the IO stack. Signed-off-by: Peng Tao <tao.peng@primarydata.com> Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Diffstat (limited to 'fs/nfs/pnfs.c')
-rw-r--r--fs/nfs/pnfs.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index e123cfce54ee..b822b1749643 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1731,7 +1731,7 @@ static void
pnfs_write_through_mds(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr)
{
- struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx];
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
list_splice_tail_init(&hdr->pages, &mirror->pg_list);
@@ -1785,7 +1785,7 @@ EXPORT_SYMBOL_GPL(pnfs_writehdr_free);
int
pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc)
{
- struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx];
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
struct nfs_pgio_header *hdr;
int ret;
@@ -1846,8 +1846,7 @@ static void
pnfs_read_through_mds(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr)
{
- struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx];
-
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
list_splice_tail_init(&hdr->pages, &mirror->pg_list);
@@ -1903,7 +1902,7 @@ EXPORT_SYMBOL_GPL(pnfs_readhdr_free);
int
pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc)
{
- struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[desc->pg_mirror_idx];
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
struct nfs_pgio_header *hdr;
int ret;