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Diffstat (limited to 'fs/nfs/callback_proc.c')
-rw-r--r--fs/nfs/callback_proc.c99
1 files changed, 46 insertions, 53 deletions
diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index 54cea8ad5a76..1b5d809a105e 100644
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -8,6 +8,7 @@
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
#include <linux/slab.h>
+#include <linux/rcupdate.h>
#include "nfs4_fs.h"
#include "callback.h"
#include "delegation.h"
@@ -33,7 +34,7 @@ __be32 nfs4_callback_getattr(struct cb_getattrargs *args,
res->bitmap[0] = res->bitmap[1] = 0;
res->status = htonl(NFS4ERR_BADHANDLE);
- dprintk("NFS: GETATTR callback request from %s\n",
+ dprintk_rcu("NFS: GETATTR callback request from %s\n",
rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
inode = nfs_delegation_find_inode(cps->clp, &args->fh);
@@ -73,7 +74,7 @@ __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy,
if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */
goto out;
- dprintk("NFS: RECALL callback request from %s\n",
+ dprintk_rcu("NFS: RECALL callback request from %s\n",
rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
res = htonl(NFS4ERR_BADHANDLE);
@@ -86,8 +87,7 @@ __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy,
res = 0;
break;
case -ENOENT:
- if (res != 0)
- res = htonl(NFS4ERR_BAD_STATEID);
+ res = htonl(NFS4ERR_BAD_STATEID);
break;
default:
res = htonl(NFS4ERR_RESOURCE);
@@ -98,52 +98,64 @@ out:
return res;
}
-int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid)
-{
- if (delegation == NULL || memcmp(delegation->stateid.data, stateid->data,
- sizeof(delegation->stateid.data)) != 0)
- return 0;
- return 1;
-}
-
#if defined(CONFIG_NFS_V4_1)
-static u32 initiate_file_draining(struct nfs_client *clp,
- struct cb_layoutrecallargs *args)
+/*
+ * Lookup a layout by filehandle.
+ *
+ * Note: gets a refcount on the layout hdr and on its respective inode.
+ * Caller must put the layout hdr and the inode.
+ *
+ * TODO: keep track of all layouts (and delegations) in a hash table
+ * hashed by filehandle.
+ */
+static struct pnfs_layout_hdr * get_layout_by_fh_locked(struct nfs_client *clp, struct nfs_fh *fh)
{
struct nfs_server *server;
- struct pnfs_layout_hdr *lo;
struct inode *ino;
- bool found = false;
- u32 rv = NFS4ERR_NOMATCHING_LAYOUT;
- LIST_HEAD(free_me_list);
+ struct pnfs_layout_hdr *lo;
- spin_lock(&clp->cl_lock);
- rcu_read_lock();
list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
list_for_each_entry(lo, &server->layouts, plh_layouts) {
- if (nfs_compare_fh(&args->cbl_fh,
- &NFS_I(lo->plh_inode)->fh))
+ if (nfs_compare_fh(fh, &NFS_I(lo->plh_inode)->fh))
continue;
ino = igrab(lo->plh_inode);
if (!ino)
continue;
- found = true;
- /* Without this, layout can be freed as soon
- * as we release cl_lock.
- */
get_layout_hdr(lo);
- break;
+ return lo;
}
- if (found)
- break;
}
+
+ return NULL;
+}
+
+static struct pnfs_layout_hdr * get_layout_by_fh(struct nfs_client *clp, struct nfs_fh *fh)
+{
+ struct pnfs_layout_hdr *lo;
+
+ spin_lock(&clp->cl_lock);
+ rcu_read_lock();
+ lo = get_layout_by_fh_locked(clp, fh);
rcu_read_unlock();
spin_unlock(&clp->cl_lock);
- if (!found)
+ return lo;
+}
+
+static u32 initiate_file_draining(struct nfs_client *clp,
+ struct cb_layoutrecallargs *args)
+{
+ struct inode *ino;
+ struct pnfs_layout_hdr *lo;
+ u32 rv = NFS4ERR_NOMATCHING_LAYOUT;
+ LIST_HEAD(free_me_list);
+
+ lo = get_layout_by_fh(clp, &args->cbl_fh);
+ if (!lo)
return NFS4ERR_NOMATCHING_LAYOUT;
+ ino = lo->plh_inode;
spin_lock(&ino->i_lock);
if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) ||
mark_matching_lsegs_invalid(lo, &free_me_list,
@@ -213,17 +225,13 @@ static u32 initiate_bulk_draining(struct nfs_client *clp,
static u32 do_callback_layoutrecall(struct nfs_client *clp,
struct cb_layoutrecallargs *args)
{
- u32 res = NFS4ERR_DELAY;
+ u32 res;
dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type);
- if (test_and_set_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state))
- goto out;
if (args->cbl_recall_type == RETURN_FILE)
res = initiate_file_draining(clp, args);
else
res = initiate_bulk_draining(clp, args);
- clear_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state);
-out:
dprintk("%s returning %i\n", __func__, res);
return res;
@@ -303,21 +311,6 @@ out:
return res;
}
-int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid)
-{
- if (delegation == NULL)
- return 0;
-
- if (stateid->stateid.seqid != 0)
- return 0;
- if (memcmp(&delegation->stateid.stateid.other,
- &stateid->stateid.other,
- NFS4_STATEID_OTHER_SIZE))
- return 0;
-
- return 1;
-}
-
/*
* Validate the sequenceID sent by the server.
* Return success if the sequenceID is one more than what we last saw on
@@ -441,7 +434,7 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
int i;
__be32 status = htonl(NFS4ERR_BADSESSION);
- clp = nfs4_find_client_sessionid(args->csa_addr, &args->csa_sessionid);
+ clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, &args->csa_sessionid);
if (clp == NULL)
goto out;
@@ -517,7 +510,7 @@ __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy,
if (!cps->clp) /* set in cb_sequence */
goto out;
- dprintk("NFS: RECALL_ANY callback request from %s\n",
+ dprintk_rcu("NFS: RECALL_ANY callback request from %s\n",
rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
status = cpu_to_be32(NFS4ERR_INVAL);
@@ -552,7 +545,7 @@ __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy,
if (!cps->clp) /* set in cb_sequence */
goto out;
- dprintk("NFS: CB_RECALL_SLOT request from %s target max slots %d\n",
+ dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target max slots %d\n",
rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR),
args->crsa_target_max_slots);