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authorBenny Halevy <bhalevy@panasas.com>2011-07-30 20:52:36 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-07-31 12:18:15 -0400
commit738fd0f360359aecc7fcd7604bbe9e854d81fb1f (patch)
treec2d7ba1680ee37383f1fd537cdafba6fef5dfd8e /fs/nfs
parent7f11d8d38d64739e190581e015a2a2730ff54e2a (diff)
downloadop-kernel-dev-738fd0f360359aecc7fcd7604bbe9e854d81fb1f.zip
op-kernel-dev-738fd0f360359aecc7fcd7604bbe9e854d81fb1f.tar.gz
pnfs: add set-clear layoutdriver interface
To allow layout driver to issue getdevicelist at mount time, and clean up at umount time. [fixup non NFS_V4_1 set_pnfs_layoutdriver definition] [pnfs: pass mntfh down the init_pnfs path] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Benny Halevy <bhalevy@tonian.com> Signed-off-by: Jim Rees <rees@umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/client.c8
-rw-r--r--fs/nfs/pnfs.c15
-rw-r--r--fs/nfs/pnfs.h8
3 files changed, 24 insertions, 7 deletions
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 19ea7d9..a9b1848 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -904,7 +904,9 @@ error:
/*
* Load up the server record from information gained in an fsinfo record
*/
-static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo)
+static void nfs_server_set_fsinfo(struct nfs_server *server,
+ struct nfs_fh *mntfh,
+ struct nfs_fsinfo *fsinfo)
{
unsigned long max_rpc_payload;
@@ -934,7 +936,7 @@ static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *
if (server->wsize > NFS_MAX_FILE_IO_SIZE)
server->wsize = NFS_MAX_FILE_IO_SIZE;
server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
- set_pnfs_layoutdriver(server, fsinfo->layouttype);
+ set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype);
server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
@@ -980,7 +982,7 @@ static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, str
if (error < 0)
goto out_error;
- nfs_server_set_fsinfo(server, &fsinfo);
+ nfs_server_set_fsinfo(server, mntfh, &fsinfo);
/* Get some general file system info */
if (server->namelen == 0) {
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index a7e5f17..3a47f7c 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -76,8 +76,11 @@ find_pnfs_driver(u32 id)
void
unset_pnfs_layoutdriver(struct nfs_server *nfss)
{
- if (nfss->pnfs_curr_ld)
+ if (nfss->pnfs_curr_ld) {
+ if (nfss->pnfs_curr_ld->clear_layoutdriver)
+ nfss->pnfs_curr_ld->clear_layoutdriver(nfss);
module_put(nfss->pnfs_curr_ld->owner);
+ }
nfss->pnfs_curr_ld = NULL;
}
@@ -88,7 +91,8 @@ unset_pnfs_layoutdriver(struct nfs_server *nfss)
* @id layout type. Zero (illegal layout type) indicates pNFS not in use.
*/
void
-set_pnfs_layoutdriver(struct nfs_server *server, u32 id)
+set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh,
+ u32 id)
{
struct pnfs_layoutdriver_type *ld_type = NULL;
@@ -115,6 +119,13 @@ set_pnfs_layoutdriver(struct nfs_server *server, u32 id)
goto out_no_driver;
}
server->pnfs_curr_ld = ld_type;
+ if (ld_type->set_layoutdriver
+ && ld_type->set_layoutdriver(server, mntfh)) {
+ printk(KERN_ERR "%s: Error initializing pNFS layout driver %u.\n",
+ __func__, id);
+ module_put(ld_type->owner);
+ goto out_no_driver;
+ }
dprintk("%s: pNFS module for %u set\n", __func__, id);
return;
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 7074394..bddd8b9 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -80,6 +80,9 @@ struct pnfs_layoutdriver_type {
struct module *owner;
unsigned flags;
+ int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
+ int (*clear_layoutdriver) (struct nfs_server *);
+
struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
void (*free_layout_hdr) (struct pnfs_layout_hdr *);
@@ -167,7 +170,7 @@ void put_lseg(struct pnfs_layout_segment *lseg);
bool pnfs_pageio_init_read(struct nfs_pageio_descriptor *, struct inode *);
bool pnfs_pageio_init_write(struct nfs_pageio_descriptor *, struct inode *, int);
-void set_pnfs_layoutdriver(struct nfs_server *, u32 id);
+void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32);
void unset_pnfs_layoutdriver(struct nfs_server *);
void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
@@ -374,7 +377,8 @@ pnfs_roc_drain(struct inode *ino, u32 *barrier)
return false;
}
-static inline void set_pnfs_layoutdriver(struct nfs_server *s, u32 id)
+static inline void set_pnfs_layoutdriver(struct nfs_server *s,
+ const struct nfs_fh *mntfh, u32 id);
{
}
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