diff options
Diffstat (limited to 'xlators/cluster/dht/src/dht-helper.c')
| -rw-r--r-- | xlators/cluster/dht/src/dht-helper.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/xlators/cluster/dht/src/dht-helper.c b/xlators/cluster/dht/src/dht-helper.c index 0384c2a4cc4..0a5e1128db1 100644 --- a/xlators/cluster/dht/src/dht-helper.c +++ b/xlators/cluster/dht/src/dht-helper.c @@ -2298,3 +2298,158 @@ dht_heal_full_path_done (int op_ret, call_frame_t *heal_frame, void *data) DHT_STACK_DESTROY (heal_frame); return 0; } + +/* This function must be called inside an inode lock */ +int +__dht_lock_subvol_set (inode_t *inode, xlator_t *this, + xlator_t *lock_subvol) +{ + dht_inode_ctx_t *ctx = NULL; + int ret = -1; + uint64_t value = 0; + + GF_VALIDATE_OR_GOTO (this->name, inode, out); + + ret = __inode_ctx_get0 (inode, this, &value); + if (ret || !value) { + return -1; + } + + ctx = (dht_inode_ctx_t *) value; + ctx->lock_subvol = lock_subvol; +out: + return ret; +} + +xlator_t* +dht_get_lock_subvolume (xlator_t *this, struct gf_flock *lock, + dht_local_t *local) +{ + xlator_t *subvol = NULL; + inode_t *inode = NULL; + int32_t ret = -1; + uint64_t value = 0; + xlator_t *cached_subvol = NULL; + dht_inode_ctx_t *ctx = NULL; + char gfid[GF_UUID_BUF_SIZE] = {0}; + + GF_VALIDATE_OR_GOTO (this->name, lock, out); + GF_VALIDATE_OR_GOTO (this->name, local, out); + + cached_subvol = local->cached_subvol; + + if (local->loc.inode || local->fd) { + inode = local->loc.inode ? local->loc.inode : local->fd->inode; + } + + if (!inode) + goto out; + + if (!(IA_ISDIR (inode->ia_type) || IA_ISINVAL (inode->ia_type))) { + /* + * We may get non-linked inode for directories as part + * of the selfheal code path. So checking for IA_INVAL + * type also. This will only happen for directory. + */ + subvol = local->cached_subvol; + goto out; + } + + if (lock->l_type != F_UNLCK) { + /* + * inode purging might happen on NFS between a lk + * and unlk. Due to this lk and unlk might be sent + * to different subvols. + * So during a lock request, taking a ref on inode + * to prevent inode purging. inode unref will happen + * in unlock cbk code path. + */ + inode_ref (inode); + } + + LOCK (&inode->lock); + ret = __inode_ctx_get0 (inode, this, &value); + if (!ret && value) { + ctx = (dht_inode_ctx_t *) value; + subvol = ctx->lock_subvol; + } + if (!subvol && lock->l_type != F_UNLCK && cached_subvol) { + ret = __dht_lock_subvol_set (inode, this, + cached_subvol); + if (ret) { + gf_uuid_unparse(inode->gfid, gfid); + gf_msg (this->name, GF_LOG_WARNING, 0, + DHT_MSG_SET_INODE_CTX_FAILED, + "Failed to set lock_subvol in " + "inode ctx for gfid %s", + gfid); + goto unlock; + } + subvol = cached_subvol; + } +unlock: + UNLOCK (&inode->lock); + if (!subvol && inode && lock->l_type != F_UNLCK) { + inode_unref (inode); + } +out: + return subvol; +} + +int +dht_lk_inode_unref (call_frame_t *frame, int32_t op_ret) +{ + int ret = -1; + dht_local_t *local = NULL; + inode_t *inode = NULL; + xlator_t *this = NULL; + char gfid[GF_UUID_BUF_SIZE] = {0}; + + local = frame->local; + this = frame->this; + + if (local->loc.inode || local->fd) { + inode = local->loc.inode ? local->loc.inode : local->fd->inode; + } + if (!inode) { + gf_msg (this->name, GF_LOG_WARNING, 0, + DHT_MSG_LOCK_INODE_UNREF_FAILED, + "Found a NULL inode. Failed to unref the inode"); + goto out; + } + + if (!(IA_ISDIR (inode->ia_type) || IA_ISINVAL (inode->ia_type))) { + ret = 0; + goto out; + } + + switch (local->lock_type) { + case F_RDLCK: + case F_WRLCK: + if (op_ret) { + gf_uuid_unparse(inode->gfid, gfid); + gf_msg_debug (this->name, 0, + "lock request failed for gfid %s", gfid); + inode_unref (inode); + goto out; + } + break; + + case F_UNLCK: + if (!op_ret) { + inode_unref (inode); + } else { + gf_uuid_unparse(inode->gfid, gfid); + gf_msg (this->name, GF_LOG_WARNING, 0, + DHT_MSG_LOCK_INODE_UNREF_FAILED, + "Unlock request failed for gfid %s." + "Failed to unref the inode", gfid); + goto out; + } + default: + break; + } + ret = 0; +out: + return ret; +} |