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authorTrond Myklebust <trond.myklebust@primarydata.com>2017-08-20 20:04:12 +0300
committerTrond Myklebust <trond.myklebust@primarydata.com>2017-08-20 20:04:12 +0300
commit7af7a5963c40d8ed853d1004701c73a221d94644 (patch)
tree23b5f9454fc911929af783887e56d433995e7344 /fs/nfs/pagelist.c
parentb7561e51868c929c40b26e45e8e63a6aa5aa211f (diff)
parent53a75f22e78a601321c2e1fd16266ecdae2f2309 (diff)
downloadlinux-7af7a5963c40d8ed853d1004701c73a221d94644.tar.xz
Merge branch 'bugfixes'
Diffstat (limited to 'fs/nfs/pagelist.c')
-rw-r--r--fs/nfs/pagelist.c77
1 files changed, 40 insertions, 37 deletions
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 548ebc7256ff..23cf4a82d94c 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -682,12 +682,8 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
const struct nfs_pgio_completion_ops *compl_ops,
const struct nfs_rw_ops *rw_ops,
size_t bsize,
- int io_flags,
- gfp_t gfp_flags)
+ int io_flags)
{
- struct nfs_pgio_mirror *new;
- int i;
-
desc->pg_moreio = 0;
desc->pg_inode = inode;
desc->pg_ops = pg_ops;
@@ -703,23 +699,10 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
desc->pg_mirror_count = 1;
desc->pg_mirror_idx = 0;
- if (pg_ops->pg_get_mirror_count) {
- /* until we have a request, we don't have an lseg and no
- * idea how many mirrors there will be */
- new = kcalloc(NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX,
- sizeof(struct nfs_pgio_mirror), gfp_flags);
- desc->pg_mirrors_dynamic = new;
- desc->pg_mirrors = new;
-
- for (i = 0; i < NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX; i++)
- nfs_pageio_mirror_init(&desc->pg_mirrors[i], bsize);
- } else {
- desc->pg_mirrors_dynamic = NULL;
- desc->pg_mirrors = desc->pg_mirrors_static;
- nfs_pageio_mirror_init(&desc->pg_mirrors[0], bsize);
- }
+ desc->pg_mirrors_dynamic = NULL;
+ desc->pg_mirrors = desc->pg_mirrors_static;
+ nfs_pageio_mirror_init(&desc->pg_mirrors[0], bsize);
}
-EXPORT_SYMBOL_GPL(nfs_pageio_init);
/**
* nfs_pgio_result - Basic pageio error handling
@@ -836,32 +819,52 @@ static int nfs_generic_pg_pgios(struct nfs_pageio_descriptor *desc)
return ret;
}
+static struct nfs_pgio_mirror *
+nfs_pageio_alloc_mirrors(struct nfs_pageio_descriptor *desc,
+ unsigned int mirror_count)
+{
+ struct nfs_pgio_mirror *ret;
+ unsigned int i;
+
+ kfree(desc->pg_mirrors_dynamic);
+ desc->pg_mirrors_dynamic = NULL;
+ if (mirror_count == 1)
+ return desc->pg_mirrors_static;
+ ret = kmalloc_array(mirror_count, sizeof(*ret), GFP_NOFS);
+ if (ret != NULL) {
+ for (i = 0; i < mirror_count; i++)
+ nfs_pageio_mirror_init(&ret[i], desc->pg_bsize);
+ desc->pg_mirrors_dynamic = ret;
+ }
+ return ret;
+}
+
/*
* nfs_pageio_setup_mirroring - determine if mirroring is to be used
* by calling the pg_get_mirror_count op
*/
-static int nfs_pageio_setup_mirroring(struct nfs_pageio_descriptor *pgio,
+static void nfs_pageio_setup_mirroring(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req)
{
- int mirror_count = 1;
+ unsigned int mirror_count = 1;
- if (!pgio->pg_ops->pg_get_mirror_count)
- return 0;
-
- mirror_count = pgio->pg_ops->pg_get_mirror_count(pgio, req);
-
- if (pgio->pg_error < 0)
- return pgio->pg_error;
-
- if (!mirror_count || mirror_count > NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX)
- return -EINVAL;
+ if (pgio->pg_ops->pg_get_mirror_count)
+ mirror_count = pgio->pg_ops->pg_get_mirror_count(pgio, req);
+ if (mirror_count == pgio->pg_mirror_count || pgio->pg_error < 0)
+ return;
- if (WARN_ON_ONCE(!pgio->pg_mirrors_dynamic))
- return -EINVAL;
+ if (!mirror_count || mirror_count > NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX) {
+ pgio->pg_error = -EINVAL;
+ return;
+ }
+ pgio->pg_mirrors = nfs_pageio_alloc_mirrors(pgio, mirror_count);
+ if (pgio->pg_mirrors == NULL) {
+ pgio->pg_error = -ENOMEM;
+ pgio->pg_mirrors = pgio->pg_mirrors_static;
+ mirror_count = 1;
+ }
pgio->pg_mirror_count = mirror_count;
-
- return 0;
}
/*