diff options
Diffstat (limited to 'fs/nfs/callback_proc.c')
-rw-r--r-- | fs/nfs/callback_proc.c | 82 |
1 files changed, 55 insertions, 27 deletions
diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c index d4d1954e9bb9..43926add945b 100644 --- a/fs/nfs/callback_proc.c +++ b/fs/nfs/callback_proc.c @@ -111,6 +111,7 @@ int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, const nf static u32 initiate_file_draining(struct nfs_client *clp, struct cb_layoutrecallargs *args) { + struct nfs_server *server; struct pnfs_layout_hdr *lo; struct inode *ino; bool found = false; @@ -118,21 +119,28 @@ static u32 initiate_file_draining(struct nfs_client *clp, LIST_HEAD(free_me_list); spin_lock(&clp->cl_lock); - list_for_each_entry(lo, &clp->cl_layouts, plh_layouts) { - if (nfs_compare_fh(&args->cbl_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; + 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)) + 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; + } + if (found) + break; } + rcu_read_unlock(); spin_unlock(&clp->cl_lock); + if (!found) return NFS4ERR_NOMATCHING_LAYOUT; @@ -154,6 +162,7 @@ static u32 initiate_file_draining(struct nfs_client *clp, static u32 initiate_bulk_draining(struct nfs_client *clp, struct cb_layoutrecallargs *args) { + struct nfs_server *server; struct pnfs_layout_hdr *lo; struct inode *ino; u32 rv = NFS4ERR_NOMATCHING_LAYOUT; @@ -167,18 +176,24 @@ static u32 initiate_bulk_draining(struct nfs_client *clp, }; spin_lock(&clp->cl_lock); - list_for_each_entry(lo, &clp->cl_layouts, plh_layouts) { + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { if ((args->cbl_recall_type == RETURN_FSID) && - memcmp(&NFS_SERVER(lo->plh_inode)->fsid, - &args->cbl_fsid, sizeof(struct nfs_fsid))) - continue; - if (!igrab(lo->plh_inode)) + memcmp(&server->fsid, &args->cbl_fsid, + sizeof(struct nfs_fsid))) continue; - get_layout_hdr(lo); - BUG_ON(!list_empty(&lo->plh_bulk_recall)); - list_add(&lo->plh_bulk_recall, &recall_list); + + list_for_each_entry(lo, &server->layouts, plh_layouts) { + if (!igrab(lo->plh_inode)) + continue; + get_layout_hdr(lo); + BUG_ON(!list_empty(&lo->plh_bulk_recall)); + list_add(&lo->plh_bulk_recall, &recall_list); + } } + rcu_read_unlock(); spin_unlock(&clp->cl_lock); + list_for_each_entry_safe(lo, tmp, &recall_list, plh_bulk_recall) { ino = lo->plh_inode; @@ -333,7 +348,7 @@ validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args) /* Normal */ if (likely(args->csa_sequenceid == slot->seq_nr + 1)) { slot->seq_nr++; - return htonl(NFS4_OK); + goto out_ok; } /* Replay */ @@ -352,11 +367,14 @@ validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args) /* Wraparound */ if (args->csa_sequenceid == 1 && (slot->seq_nr + 1) == 0) { slot->seq_nr = 1; - return htonl(NFS4_OK); + goto out_ok; } /* Misordered request */ return htonl(NFS4ERR_SEQ_MISORDERED); +out_ok: + tbl->highest_used_slotid = args->csa_slotid; + return htonl(NFS4_OK); } /* @@ -418,26 +436,37 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, struct cb_sequenceres *res, struct cb_process_state *cps) { + struct nfs4_slot_table *tbl; struct nfs_client *clp; int i; __be32 status = htonl(NFS4ERR_BADSESSION); - cps->clp = NULL; - clp = nfs4_find_client_sessionid(args->csa_addr, &args->csa_sessionid); if (clp == NULL) goto out; + tbl = &clp->cl_session->bc_slot_table; + + spin_lock(&tbl->slot_tbl_lock); /* state manager is resetting the session */ if (test_bit(NFS4_SESSION_DRAINING, &clp->cl_session->session_state)) { - status = NFS4ERR_DELAY; + spin_unlock(&tbl->slot_tbl_lock); + status = htonl(NFS4ERR_DELAY); + /* Return NFS4ERR_BADSESSION if we're draining the session + * in order to reset it. + */ + if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) + status = htonl(NFS4ERR_BADSESSION); goto out; } status = validate_seqid(&clp->cl_session->bc_slot_table, args); + spin_unlock(&tbl->slot_tbl_lock); if (status) goto out; + cps->slotid = args->csa_slotid; + /* * Check for pending referring calls. If a match is found, a * related callback was received before the response to the original @@ -454,7 +483,6 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, res->csr_slotid = args->csa_slotid; res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; - nfs4_cb_take_slot(clp); out: cps->clp = clp; /* put in nfs4_callback_compound */ |