diff options
Diffstat (limited to 'fs/nfs/nfs4state.c')
-rw-r--r-- | fs/nfs/nfs4state.c | 74 |
1 files changed, 8 insertions, 66 deletions
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 8472707286f..5abf23615bc 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -317,62 +317,6 @@ out: return cred; } -static void nfs_alloc_unique_id_locked(struct rb_root *root, - struct nfs_unique_id *new, - __u64 minval, int maxbits) -{ - struct rb_node **p, *parent; - struct nfs_unique_id *pos; - __u64 mask = ~0ULL; - - if (maxbits < 64) - mask = (1ULL << maxbits) - 1ULL; - - /* Ensure distribution is more or less flat */ - get_random_bytes(&new->id, sizeof(new->id)); - new->id &= mask; - if (new->id < minval) - new->id += minval; -retry: - p = &root->rb_node; - parent = NULL; - - while (*p != NULL) { - parent = *p; - pos = rb_entry(parent, struct nfs_unique_id, rb_node); - - if (new->id < pos->id) - p = &(*p)->rb_left; - else if (new->id > pos->id) - p = &(*p)->rb_right; - else - goto id_exists; - } - rb_link_node(&new->rb_node, parent, p); - rb_insert_color(&new->rb_node, root); - return; -id_exists: - for (;;) { - new->id++; - if (new->id < minval || (new->id & mask) != new->id) { - new->id = minval; - break; - } - parent = rb_next(parent); - if (parent == NULL) - break; - pos = rb_entry(parent, struct nfs_unique_id, rb_node); - if (new->id < pos->id) - break; - } - goto retry; -} - -static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id) -{ - rb_erase(&id->rb_node, root); -} - static struct nfs4_state_owner * nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) { @@ -800,7 +744,6 @@ static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, f { struct nfs4_lock_state *lsp; struct nfs_server *server = state->owner->so_server; - struct nfs_client *clp = server->nfs_client; lsp = kzalloc(sizeof(*lsp), GFP_NOFS); if (lsp == NULL) @@ -820,24 +763,23 @@ static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, f lsp->ls_owner.lo_u.posix_owner = fl_owner; break; default: - kfree(lsp); - return NULL; + goto out_free; } - spin_lock(&clp->cl_lock); - nfs_alloc_unique_id_locked(&server->lockowner_id, &lsp->ls_id, 1, 64); - spin_unlock(&clp->cl_lock); + lsp->ls_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); + if (lsp->ls_id < 0) + goto out_free; INIT_LIST_HEAD(&lsp->ls_locks); return lsp; +out_free: + kfree(lsp); + return NULL; } static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) { struct nfs_server *server = lsp->ls_state->owner->so_server; - struct nfs_client *clp = server->nfs_client; - spin_lock(&clp->cl_lock); - nfs_free_unique_id(&server->lockowner_id, &lsp->ls_id); - spin_unlock(&clp->cl_lock); + ida_simple_remove(&server->lockowner_id, lsp->ls_id); rpc_destroy_wait_queue(&lsp->ls_sequence.wait); kfree(lsp); } |