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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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3
fs/nfs/pnfs.h
View File

@ -366,6 +366,9 @@ bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
void nfs4_deviceid_purge_client(const struct nfs_client *);
/* pnfs_nfs.c */
struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags);
void pnfs_free_commit_array(struct pnfs_commit_array *p);
void pnfs_generic_clear_request_commit(struct nfs_page *req,
struct nfs_commit_info *cinfo);
void pnfs_generic_commit_release(void *calldata);

31
fs/nfs/pnfs_nfs.c
View File

@ -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,

15
include/linux/nfs_xdr.h
View File

@ -1270,10 +1270,19 @@ struct pnfs_commit_bucket {
struct nfs_writeverf direct_verf;
};
struct pnfs_commit_array {
struct list_head cinfo_list;
struct list_head lseg_list;
struct pnfs_layout_segment *lseg;
struct rcu_head rcu;
unsigned int nbuckets;
struct pnfs_commit_bucket buckets[];
};
struct pnfs_ds_commit_info {
int nwritten;
int ncommitting;
int nbuckets;
unsigned int nwritten;
unsigned int ncommitting;
unsigned int nbuckets;
struct pnfs_commit_bucket *buckets;
};