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Diffstat (limited to 'xlators/experimental/nsr-server/src/nsr-internal.h')
| -rw-r--r-- | xlators/experimental/nsr-server/src/nsr-internal.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/xlators/experimental/nsr-server/src/nsr-internal.h b/xlators/experimental/nsr-server/src/nsr-internal.h new file mode 100644 index 00000000000..b8c7fc314b7 --- /dev/null +++ b/xlators/experimental/nsr-server/src/nsr-internal.h @@ -0,0 +1,114 @@ +/* + Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com> + This file is part of GlusterFS. + + This file is licensed to you under your choice of the GNU Lesser + General Public License, version 3 or any later version (LGPLv3 or + later), or the GNU General Public License, version 2 (GPLv2), in all + cases as published by the Free Software Foundation. +*/ + +#include <sys/stat.h> +#include <sys/types.h> + +#define LEADER_XATTR "user.nsr.leader" +#define SECOND_CHILD(xl) (xl->children->next->xlator) +#define RECONCILER_PATH NSR_SCRIPT_PREFIX"/reconciler.py" +#define CHANGELOG_ENTRY_SIZE 128 + +enum { + gf_mt_nsr_private_t = gf_common_mt_end + 1, + gf_mt_nsr_fd_ctx_t, + gf_mt_nsr_inode_ctx_t, + gf_mt_nsr_dirty_t, + gf_mt_nsr_end +}; + +typedef enum nsr_recon_notify_ev_id_t { + NSR_RECON_SET_LEADER = 1, + NSR_RECON_ADD_CHILD = 2 +} nsr_recon_notify_ev_id_t; + +typedef struct _nsr_recon_notify_ev_s { + nsr_recon_notify_ev_id_t id; + uint32_t index; /* in case of add */ + struct list_head list; +} nsr_recon_notify_ev_t; + +typedef struct { + /* + * This is a hack to allow a non-leader to accept requests while the + * leader is down, and it only works for n=2. The way it works is that + * "config_leader" indicates the state from our options (via init or + * reconfigure) but "leader" is what the fop code actually looks at. If + * config_leader is true, then leader will *always* be true as well, + * giving that brick precedence. If config_leader is false, then + * leader will only be true if there is no connection to the other + * brick (tracked in nsr_notify). + * + * TBD: implement real leader election + */ + gf_boolean_t config_leader; + gf_boolean_t leader; + uint8_t up_children; + uint8_t n_children; + char *vol_file; + uint32_t current_term; + uint32_t kid_state; + gf_lock_t dirty_lock; + struct list_head dirty_fds; + uint32_t index; + gf_lock_t index_lock; + double quorum_pct; + int term_fd; + long term_total; + long term_read; + /* + * This is a super-duper hack, but it will do for now. The reason it's + * a hack is that we pass this to dict_set_static_bin, so we don't have + * to mess around with allocating and freeing it on every single IPC + * request, but it's totally not thread-safe. On the other hand, there + * should only be one reconciliation thread running and calling these + * functions at a time, so maybe that doesn't matter. + * + * TBD: re-evaluate how to manage this + */ + char term_buf[CHANGELOG_ENTRY_SIZE]; +} nsr_private_t; + +typedef struct { + call_stub_t *stub; + call_stub_t *qstub; + uint32_t call_count; + uint32_t successful_acks; + uint32_t successful_op_ret; + fd_t *fd; + struct list_head qlinks; +} nsr_local_t; + +/* + * This should match whatever changelog returns on the pre-op for us to pass + * when we're ready for our post-op. + */ +typedef uint32_t log_id_t; + +typedef struct { + struct list_head links; + log_id_t id; +} nsr_dirty_list_t; + +typedef struct { + fd_t *fd; + struct list_head dirty_list; + struct list_head fd_list; +} nsr_fd_ctx_t; + +typedef struct { + gf_lock_t lock; + uint32_t active; + struct list_head aqueue; + uint32_t pending; + struct list_head pqueue; +} nsr_inode_ctx_t; + +void nsr_start_reconciler (xlator_t *this); |