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pNFS: Add a helper to allocate the array of buckets

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Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust
2020-03-18 17:22:47 -04:00
parent 19573c939a
commit d7242c4641
3 changed files with 46 additions and 3 deletions
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31
fs/nfs/pnfs_nfs.c
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@@ -87,6 +87,37 @@ out:
}
EXPORT_SYMBOL_GPL(pnfs_generic_clear_request_commit);
struct pnfs_commit_array *
pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags)
{
struct pnfs_commit_array *p;
struct pnfs_commit_bucket *b;
p = kmalloc(struct_size(p, buckets, n), gfp_flags);
if (!p)
return NULL;
p->nbuckets = n;
INIT_LIST_HEAD(&p->cinfo_list);
INIT_LIST_HEAD(&p->lseg_list);
p->lseg = NULL;
for (b = &p->buckets[0]; n != 0; b++, n--) {
INIT_LIST_HEAD(&b->written);
INIT_LIST_HEAD(&b->committing);
b->wlseg = NULL;
b->clseg = NULL;
b->direct_verf.committed = NFS_INVALID_STABLE_HOW;
}
return p;
}
EXPORT_SYMBOL_GPL(pnfs_alloc_commit_array);
void
pnfs_free_commit_array(struct pnfs_commit_array *p)
{
kfree_rcu(p, rcu);
}
EXPORT_SYMBOL_GPL(pnfs_free_commit_array);
static int
pnfs_generic_scan_ds_commit_list(struct pnfs_commit_bucket *bucket,
struct nfs_commit_info *cinfo,