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NFSv4.1 ref count nfs_client across filelayout data server io 

Prepare to put a dis-connected DS client record.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson 2012-04-27 17:53:51 -04:00 committed by Trond Myklebust
parent 0a57cdac3f
commit 3a7936c3fc
1 changed files with 21 additions and 5 deletions
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26
fs/nfs/nfs4filelayout.c
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@ -101,6 +101,9 @@ static void filelayout_reset_write(struct nfs_write_data *data)
&hdr->pages,
hdr->completion_ops);
}
/* balance nfs_get_client in filelayout_write_pagelist */
nfs_put_client(data->ds_clp);
data->ds_clp = NULL;
}
static void filelayout_reset_read(struct nfs_read_data *data)
@ -122,6 +125,9 @@ static void filelayout_reset_read(struct nfs_read_data *data)
&hdr->pages,
hdr->completion_ops);
}
/* balance nfs_get_client in filelayout_read_pagelist */
nfs_put_client(data->ds_clp);
data->ds_clp = NULL;
}
static int filelayout_async_handle_error(struct rpc_task *task,
@ -298,6 +304,8 @@ static void filelayout_read_release(void *data)
{
struct nfs_read_data *rdata = data;
if (!test_bit(NFS_IOHDR_REDO, &rdata->header->flags))
nfs_put_client(rdata->ds_clp);
rdata->header->mds_ops->rpc_release(data);
}
@ -395,6 +403,8 @@ static void filelayout_write_release(void *data)
{
struct nfs_write_data *wdata = data;
if (!test_bit(NFS_IOHDR_REDO, &wdata->header->flags))
nfs_put_client(wdata->ds_clp);
wdata->header->mds_ops->rpc_release(data);
}
@ -431,6 +441,7 @@ static void filelayout_commit_release(void *calldata)
data->completion_ops->completion(data);
put_lseg(data->lseg);
nfs_put_client(data->ds_clp);
nfs_commitdata_release(data);
}
@ -476,9 +487,11 @@ filelayout_read_pagelist(struct nfs_read_data *data)
ds = nfs4_fl_prepare_ds(lseg, idx);
if (!ds)
return PNFS_NOT_ATTEMPTED;
dprintk("%s USE DS: %s\n", __func__, ds->ds_remotestr);
dprintk("%s USE DS: %s cl_count %d\n", __func__,
ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count));
/* No multipath support. Use first DS */
atomic_inc(&ds->ds_clp->cl_count);
data->ds_clp = ds->ds_clp;
fh = nfs4_fl_select_ds_fh(lseg, j);
if (fh)
@ -512,11 +525,12 @@ filelayout_write_pagelist(struct nfs_write_data *data, int sync)
ds = nfs4_fl_prepare_ds(lseg, idx);
if (!ds)
return PNFS_NOT_ATTEMPTED;
dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s\n", __func__,
hdr->inode->i_ino, sync, (size_t) data->args.count, offset,
ds->ds_remotestr);
dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d\n",
__func__, hdr->inode->i_ino, sync, (size_t) data->args.count,
offset, ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count));
data->write_done_cb = filelayout_write_done_cb;
atomic_inc(&ds->ds_clp->cl_count);
data->ds_clp = ds->ds_clp;
fh = nfs4_fl_select_ds_fh(lseg, j);
if (fh)
@ -1048,8 +1062,10 @@ static int filelayout_initiate_commit(struct nfs_commit_data *data, int how)
filelayout_commit_release(data);
return -EAGAIN;
}
dprintk("%s ino %lu, how %d\n", __func__, data->inode->i_ino, how);
dprintk("%s ino %lu, how %d cl_count %d\n", __func__,
data->inode->i_ino, how, atomic_read(&ds->ds_clp->cl_count));
data->commit_done_cb = filelayout_commit_done_cb;
atomic_inc(&ds->ds_clp->cl_count);
data->ds_clp = ds->ds_clp;
fh = select_ds_fh_from_commit(lseg, data->ds_commit_index);
if (fh)