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pNFS: Add a layoutreturn callback to performa layout-private setup 

Add a callback to allow the flexfiles layout driver to initialise the
layout private payload.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2016-12-02 16:12:12 -05:00
parent 4d796d751c
commit 287bd3e954
2 changed files with 14 additions and 1 deletions
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14
fs/nfs/pnfs.c
View File

@ -1072,6 +1072,7 @@ pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, const nfs4_stateid *stateid,
enum pnfs_iomode iomode, bool sync)
{
struct inode *ino = lo->plh_inode;
struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld;
struct nfs4_layoutreturn *lrp;
int status = 0;
@ -1089,6 +1090,8 @@ pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, const nfs4_stateid *stateid,
lrp->args.ld_private = &lrp->ld_private;
lrp->clp = NFS_SERVER(ino)->nfs_client;
lrp->cred = lo->plh_lc_cred;
if (ld->prepare_layoutreturn)
ld->prepare_layoutreturn(&lrp->args);
status = nfs4_proc_layoutreturn(lrp, sync);
out:
@ -1310,9 +1313,15 @@ retry:
out_noroc:
spin_unlock(&ino->i_lock);
pnfs_layoutcommit_inode(ino, true);
if (roc) {
struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld;
if (ld->prepare_layoutreturn)
ld->prepare_layoutreturn(args);
return true;
}
if (layoutreturn)
pnfs_send_layoutreturn(lo, &stateid, iomode, true);
return roc;
return false;
}
void pnfs_roc_release(struct nfs4_layoutreturn_args *args,
@ -1322,6 +1331,7 @@ void pnfs_roc_release(struct nfs4_layoutreturn_args *args,
struct pnfs_layout_hdr *lo = args->layout;
const nfs4_stateid *arg_stateid = NULL;
const nfs4_stateid *res_stateid = NULL;
struct nfs4_xdr_opaque_data *ld_private = args->ld_private;
if (ret == 0) {
arg_stateid = &args->stateid;
@ -1330,6 +1340,8 @@ void pnfs_roc_release(struct nfs4_layoutreturn_args *args,
}
pnfs_layoutreturn_free_lsegs(lo, arg_stateid, &args->range,
res_stateid);
if (ld_private && ld_private->ops && ld_private->ops->free)
ld_private->ops->free(ld_private);
pnfs_put_layout_hdr(lo);
trace_nfs4_layoutreturn_on_close(args->inode, 0);
}

1
fs/nfs/pnfs.h
View File

@ -172,6 +172,7 @@ struct pnfs_layoutdriver_type {
(struct nfs_server *server, struct pnfs_device *pdev,
gfp_t gfp_flags);
int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *);
void (*encode_layoutreturn) (struct xdr_stream *xdr,
const struct nfs4_layoutreturn_args *args);