diff options
Diffstat (limited to 'fs/nfsd/nfs4layouts.c')
| -rw-r--r-- | fs/nfsd/nfs4layouts.c | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c index ce2d010d3b17..825c7bc8d789 100644 --- a/fs/nfsd/nfs4layouts.c +++ b/fs/nfsd/nfs4layouts.c @@ -1,6 +1,7 @@ /* * Copyright (c) 2014 Christoph Hellwig. */ +#include <linux/blkdev.h> #include <linux/kmod.h> #include <linux/file.h> #include <linux/jhash.h> @@ -26,7 +27,12 @@ static const struct nfsd4_callback_ops nfsd4_cb_layout_ops; static const struct lock_manager_operations nfsd4_layouts_lm_ops; const struct nfsd4_layout_ops *nfsd4_layout_ops[LAYOUT_TYPE_MAX] = { +#ifdef CONFIG_NFSD_BLOCKLAYOUT [LAYOUT_BLOCK_VOLUME] = &bl_layout_ops, +#endif +#ifdef CONFIG_NFSD_SCSILAYOUT + [LAYOUT_SCSI] = &scsi_layout_ops, +#endif }; /* pNFS device ID to export fsid mapping */ @@ -121,10 +127,24 @@ void nfsd4_setup_layout_type(struct svc_export *exp) if (!(exp->ex_flags & NFSEXP_PNFS)) return; + /* + * Check if the file system supports exporting a block-like layout. + * If the block device supports reservations prefer the SCSI layout, + * otherwise advertise the block layout. + */ +#ifdef CONFIG_NFSD_BLOCKLAYOUT if (sb->s_export_op->get_uuid && sb->s_export_op->map_blocks && sb->s_export_op->commit_blocks) exp->ex_layout_type = LAYOUT_BLOCK_VOLUME; +#endif +#ifdef CONFIG_NFSD_SCSILAYOUT + /* overwrite block layout selection if needed */ + if (sb->s_export_op->map_blocks && + sb->s_export_op->commit_blocks && + sb->s_bdev && sb->s_bdev->bd_disk->fops->pr_ops) + exp->ex_layout_type = LAYOUT_SCSI; +#endif } static void @@ -590,8 +610,6 @@ nfsd4_cb_layout_fail(struct nfs4_layout_stateid *ls) rpc_ntop((struct sockaddr *)&clp->cl_addr, addr_str, sizeof(addr_str)); - trace_layout_recall_fail(&ls->ls_stid.sc_stateid); - printk(KERN_WARNING "nfsd: client %s failed to respond to layout recall. " " Fencing..\n", addr_str); @@ -626,6 +644,7 @@ nfsd4_cb_layout_done(struct nfsd4_callback *cb, struct rpc_task *task) container_of(cb, struct nfs4_layout_stateid, ls_recall); struct nfsd_net *nn; ktime_t now, cutoff; + const struct nfsd4_layout_ops *ops; LIST_HEAD(reaplist); @@ -661,7 +680,13 @@ nfsd4_cb_layout_done(struct nfsd4_callback *cb, struct rpc_task *task) /* * Unknown error or non-responding client, we'll need to fence. */ - nfsd4_cb_layout_fail(ls); + trace_layout_recall_fail(&ls->ls_stid.sc_stateid); + + ops = nfsd4_layout_ops[ls->ls_layout_type]; + if (ops->fence_client) + ops->fence_client(ls); + else + nfsd4_cb_layout_fail(ls); return -1; } } |