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Diffstat (limited to 'fs/nfs/read.c')
-rw-r--r--fs/nfs/read.c30
1 files changed, 25 insertions, 5 deletions
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 092ab499f2b6..568ecf0a880f 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -70,8 +70,15 @@ EXPORT_SYMBOL_GPL(nfs_pageio_init_read);
void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio)
{
+ struct nfs_pgio_mirror *mirror;
+
pgio->pg_ops = &nfs_pgio_rw_ops;
- pgio->pg_bsize = NFS_SERVER(pgio->pg_inode)->rsize;
+
+ /* read path should never have more than one mirror */
+ WARN_ON_ONCE(pgio->pg_mirror_count != 1);
+
+ mirror = &pgio->pg_mirrors[0];
+ mirror->pg_bsize = NFS_SERVER(pgio->pg_inode)->rsize;
}
EXPORT_SYMBOL_GPL(nfs_pageio_reset_read_mds);
@@ -81,6 +88,7 @@ int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
struct nfs_page *new;
unsigned int len;
struct nfs_pageio_descriptor pgio;
+ struct nfs_pgio_mirror *pgm;
len = nfs_page_length(page);
if (len == 0)
@@ -97,7 +105,13 @@ int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
&nfs_async_read_completion_ops);
nfs_pageio_add_request(&pgio, new);
nfs_pageio_complete(&pgio);
- NFS_I(inode)->read_io += pgio.pg_bytes_written;
+
+ /* It doesn't make sense to do mirrored reads! */
+ WARN_ON_ONCE(pgio.pg_mirror_count != 1);
+
+ pgm = &pgio.pg_mirrors[0];
+ NFS_I(inode)->read_io += pgm->pg_bytes_written;
+
return 0;
}
@@ -352,6 +366,7 @@ int nfs_readpages(struct file *filp, struct address_space *mapping,
struct list_head *pages, unsigned nr_pages)
{
struct nfs_pageio_descriptor pgio;
+ struct nfs_pgio_mirror *pgm;
struct nfs_readdesc desc = {
.pgio = &pgio,
};
@@ -387,10 +402,15 @@ int nfs_readpages(struct file *filp, struct address_space *mapping,
&nfs_async_read_completion_ops);
ret = read_cache_pages(mapping, pages, readpage_async_filler, &desc);
-
nfs_pageio_complete(&pgio);
- NFS_I(inode)->read_io += pgio.pg_bytes_written;
- npages = (pgio.pg_bytes_written + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+
+ /* It doesn't make sense to do mirrored reads! */
+ WARN_ON_ONCE(pgio.pg_mirror_count != 1);
+
+ pgm = &pgio.pg_mirrors[0];
+ NFS_I(inode)->read_io += pgm->pg_bytes_written;
+ npages = (pgm->pg_bytes_written + PAGE_CACHE_SIZE - 1) >>
+ PAGE_CACHE_SHIFT;
nfs_add_stats(inode, NFSIOS_READPAGES, npages);
read_complete:
put_nfs_open_context(desc.ctx);