Boaz Harrosh wrote:
> From: Tao Guo <guotao@xxxxxxxxxxxx>
>
> So in blocklayoutdriver, we can use GFP_KERNEL to do memory
> allocation in bl_setup_layoutcommit().
>
> The state protected by the lo_lock here is clear now, which is the
> layout_commit's position and state. .i.e write_begin/end_pos,
> nfsi->lo_cred, and the call to pnfs_get_layout_stateid.
Yeah, this looks cleaner.
Tao, can you please test and ack this patch before I merge it?
Thanks!
Benny
>
> Signed-off-by: Tao Guo <guotao@xxxxxxxxxxxx>
> Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
> ---
> fs/nfs/pnfs.c | 66 +++++++++++++++++++++++++++++---------------------------
> 1 files changed, 34 insertions(+), 32 deletions(-)
>
> diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
> index d4e4ba9..cf9cfe5 100644
> --- a/fs/nfs/pnfs.c
> +++ b/fs/nfs/pnfs.c
> @@ -2075,15 +2075,22 @@ pnfs_layoutcommit_done(struct pnfs_layoutcommit_data *data)
> * Set up the argument/result storage required for the RPC call.
> */
> static int
> -pnfs_layoutcommit_setup(struct pnfs_layoutcommit_data *data, int sync)
> +pnfs_layoutcommit_setup(struct inode *inode,
> + struct pnfs_layoutcommit_data *data,
> + loff_t write_begin_pos, loff_t write_end_pos, int sync)
> {
> - struct nfs_inode *nfsi = NFS_I(data->args.inode);
> - struct nfs_server *nfss = NFS_SERVER(data->args.inode);
> + struct nfs_inode *nfsi = NFS_I(inode);
> + struct nfs_server *nfss = NFS_SERVER(inode);
> int result = 0;
>
> dprintk("%s Begin (sync:%d)\n", __func__, sync);
> - data->args.fh = NFS_FH(data->args.inode);
> +
> + data->is_sync = sync;
> + data->args.inode = inode;
> + data->args.fh = NFS_FH(inode);
> data->args.layout_type = nfss->pnfs_curr_ld->id;
> + data->res.fattr = &data->fattr;
> + nfs_fattr_init(&data->fattr);
>
> /* TODO: Need to determine the correct values */
> data->args.time_modify_changed = 0;
> @@ -2091,26 +2098,19 @@ pnfs_layoutcommit_setup(struct pnfs_layoutcommit_data *data, int sync)
> /* Set values from inode so it can be reset
> */
> data->args.lseg.iomode = IOMODE_RW;
> - data->args.lseg.offset = nfsi->pnfs_write_begin_pos;
> - data->args.lseg.length = nfsi->pnfs_write_end_pos - nfsi->pnfs_write_begin_pos + 1;
> - data->args.lastbytewritten = min(nfsi->pnfs_write_end_pos,
> - i_size_read(&nfsi->vfs_inode) - 1);
> + data->args.lseg.offset = write_begin_pos;
> + data->args.lseg.length = write_end_pos - write_begin_pos + 1;
> + data->args.lastbytewritten = min(write_end_pos,
> + i_size_read(inode) - 1);
> data->args.bitmask = nfss->attr_bitmask;
> data->res.server = nfss;
>
> /* Call layout driver to set the arguments.
> */
> - if (nfss->pnfs_curr_ld->ld_io_ops->setup_layoutcommit) {
> + if (nfss->pnfs_curr_ld->ld_io_ops->setup_layoutcommit)
> result = nfss->pnfs_curr_ld->ld_io_ops->setup_layoutcommit(
> &nfsi->layout, &data->args);
> - if (result)
> - goto out;
> - }
> - pnfs_get_layout_stateid(&data->args.stateid, &nfsi->layout);
> - data->res.fattr = &data->fattr;
> - nfs_fattr_init(&data->fattr);
>
> -out:
> dprintk("%s End Status %d\n", __func__, result);
> return result;
> }
> @@ -2122,6 +2122,9 @@ pnfs_layoutcommit_inode(struct inode *inode, int sync)
> {
> struct pnfs_layoutcommit_data *data;
> struct nfs_inode *nfsi = NFS_I(inode);
> + loff_t write_begin_pos;
> + loff_t write_end_pos;
> +
> int status = 0;
>
> dprintk("%s Begin (sync:%d)\n", __func__, sync);
> @@ -2133,39 +2136,38 @@ pnfs_layoutcommit_inode(struct inode *inode, int sync)
> return -ENOMEM;
>
> spin_lock(&nfsi->lo_lock);
> - if (!layoutcommit_needed(nfsi))
> - goto out_unlock;
> -
> - data->args.inode = inode;
> - data->cred = nfsi->lo_cred;
> -
> - /* Set up layout commit args*/
> - status = pnfs_layoutcommit_setup(data, sync);
> + if (!layoutcommit_needed(nfsi)) {
> + spin_unlock(&nfsi->lo_lock);
> + goto out_free;
> + }
>
> /* Clear layoutcommit properties in the inode so
> * new lc info can be generated
> */
> + write_begin_pos = nfsi->pnfs_write_begin_pos;
> + write_end_pos = nfsi->pnfs_write_end_pos;
> + data->cred = nfsi->lo_cred;
> nfsi->pnfs_write_begin_pos = 0;
> nfsi->pnfs_write_end_pos = 0;
> nfsi->lo_cred = NULL;
> + pnfs_get_layout_stateid(&data->args.stateid, &nfsi->layout);
>
> + spin_unlock(&nfsi->lo_lock);
> +
> + /* Set up layout commit args */
> + status = pnfs_layoutcommit_setup(inode, data, write_begin_pos,
> + write_end_pos, sync);
> if (status) {
> /* The layout driver failed to setup the layoutcommit */
> put_rpccred(data->cred);
> - goto out_unlock;
> + goto out_free;
> }
> -
> - /* release lock on pnfs layoutcommit attrs */
> - spin_unlock(&nfsi->lo_lock);
> -
> - data->is_sync = sync;
> status = pnfs4_proc_layoutcommit(data);
> out:
> dprintk("%s end (err:%d)\n", __func__, status);
> return status;
> -out_unlock:
> +out_free:
> pnfs_layoutcommit_free(data);
> - spin_unlock(&nfsi->lo_lock);
> goto out;
> }
>
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