/* Unix SMB/CIFS implementation. oplock processing Copyright (C) Andrew Tridgell 1992-1998 Copyright (C) Jeremy Allison 1998 - 2001 Copyright (C) Volker Lendecke 2005 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #define DBGC_CLASS DBGC_LOCKING #include "includes.h" #include "smbd/smbd.h" #include "smbd/globals.h" #include "messages.h" /**************************************************************************** Get the number of current exclusive oplocks. ****************************************************************************/ int32 get_number_of_exclusive_open_oplocks(void) { return exclusive_oplocks_open; } /* * helper function used by the kernel oplock backends to post the break message */ void break_kernel_oplock(struct messaging_context *msg_ctx, files_struct *fsp) { uint8_t msg[MSG_SMB_KERNEL_BREAK_SIZE]; /* Put the kernel break info into the message. */ push_file_id_24((char *)msg, &fsp->file_id); SIVAL(msg,24,fsp->fh->gen_id); /* Don't need to be root here as we're only ever sending to ourselves. */ messaging_send_buf(msg_ctx, messaging_server_id(msg_ctx), MSG_SMB_KERNEL_BREAK, msg, MSG_SMB_KERNEL_BREAK_SIZE); } /**************************************************************************** Attempt to set an oplock on a file. Succeeds if kernel oplocks are disabled (just sets flags) and no byte-range locks in the file. Returns True if oplock set. ****************************************************************************/ bool set_file_oplock(files_struct *fsp, int oplock_type) { if (fsp->oplock_type == LEVEL_II_OPLOCK) { if (koplocks && !(koplocks->flags & KOPLOCKS_LEVEL2_SUPPORTED)) { DEBUG(10, ("Refusing level2 oplock, kernel oplocks " "don't support them\n")); return false; } } if ((fsp->oplock_type != NO_OPLOCK) && (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK) && koplocks && !koplocks->ops->set_oplock(koplocks, fsp, oplock_type)) { return False; } fsp->oplock_type = oplock_type; fsp->sent_oplock_break = NO_BREAK_SENT; if (oplock_type == LEVEL_II_OPLOCK) { level_II_oplocks_open++; } else if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) { exclusive_oplocks_open++; } DEBUG(5,("set_file_oplock: granted oplock on file %s, %s/%lu, " "tv_sec = %x, tv_usec = %x\n", fsp_str_dbg(fsp), file_id_string_tos(&fsp->file_id), fsp->fh->gen_id, (int)fsp->open_time.tv_sec, (int)fsp->open_time.tv_usec )); return True; } /**************************************************************************** Attempt to release an oplock on a file. Decrements oplock count. ****************************************************************************/ void release_file_oplock(files_struct *fsp) { if ((fsp->oplock_type != NO_OPLOCK) && (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK) && koplocks) { koplocks->ops->release_oplock(koplocks, fsp, NO_OPLOCK); } if (fsp->oplock_type == LEVEL_II_OPLOCK) { level_II_oplocks_open--; } else if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) { exclusive_oplocks_open--; } SMB_ASSERT(exclusive_oplocks_open>=0); SMB_ASSERT(level_II_oplocks_open>=0); if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) { /* This doesn't matter for close. */ fsp->oplock_type = FAKE_LEVEL_II_OPLOCK; } else { fsp->oplock_type = NO_OPLOCK; } fsp->sent_oplock_break = NO_BREAK_SENT; flush_write_cache(fsp, OPLOCK_RELEASE_FLUSH); delete_write_cache(fsp); TALLOC_FREE(fsp->oplock_timeout); } /**************************************************************************** Attempt to downgrade an oplock on a file. Doesn't decrement oplock count. ****************************************************************************/ static void downgrade_file_oplock(files_struct *fsp) { if (!EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) { DEBUG(0, ("trying to downgrade an already-downgraded oplock!\n")); return; } if (koplocks) { koplocks->ops->release_oplock(koplocks, fsp, LEVEL_II_OPLOCK); } fsp->oplock_type = LEVEL_II_OPLOCK; exclusive_oplocks_open--; level_II_oplocks_open++; fsp->sent_oplock_break = NO_BREAK_SENT; } /**************************************************************************** Remove a file oplock. Copes with level II and exclusive. Locks then unlocks the share mode lock. Client can decide to go directly to none even if a "break-to-level II" was sent. ****************************************************************************/ bool remove_oplock(files_struct *fsp) { bool ret; struct share_mode_lock *lck; /* Remove the oplock flag from the sharemode. */ lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL, NULL); if (lck == NULL) { DEBUG(0,("remove_oplock: failed to lock share entry for " "file %s\n", fsp_str_dbg(fsp))); return False; } ret = remove_share_oplock(lck, fsp); if (!ret) { DEBUG(0,("remove_oplock: failed to remove share oplock for " "file %s fnum %d, %s\n", fsp_str_dbg(fsp), fsp->fnum, file_id_string_tos(&fsp->file_id))); } release_file_oplock(fsp); TALLOC_FREE(lck); return ret; } /* * Deal with a reply when a break-to-level II was sent. */ bool downgrade_oplock(files_struct *fsp) { bool ret; struct share_mode_lock *lck; lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL, NULL); if (lck == NULL) { DEBUG(0,("downgrade_oplock: failed to lock share entry for " "file %s\n", fsp_str_dbg(fsp))); return False; } ret = downgrade_share_oplock(lck, fsp); if (!ret) { DEBUG(0,("downgrade_oplock: failed to downgrade share oplock " "for file %s fnum %d, file_id %s\n", fsp_str_dbg(fsp), fsp->fnum, file_id_string_tos(&fsp->file_id))); } downgrade_file_oplock(fsp); TALLOC_FREE(lck); return ret; } /* * Some kernel oplock implementations handle the notification themselves. */ bool should_notify_deferred_opens() { return !(koplocks && (koplocks->flags & KOPLOCKS_DEFERRED_OPEN_NOTIFICATION)); } /**************************************************************************** Set up an oplock break message. ****************************************************************************/ static char *new_break_message_smb1(TALLOC_CTX *mem_ctx, files_struct *fsp, int cmd) { char *result = TALLOC_ARRAY(mem_ctx, char, smb_size + 8*2 + 0); if (result == NULL) { DEBUG(0, ("talloc failed\n")); return NULL; } memset(result,'\0',smb_size); srv_set_message(result,8,0,true); SCVAL(result,smb_com,SMBlockingX); SSVAL(result,smb_tid,fsp->conn->cnum); SSVAL(result,smb_pid,0xFFFF); SSVAL(result,smb_uid,0); SSVAL(result,smb_mid,0xFFFF); SCVAL(result,smb_vwv0,0xFF); SSVAL(result,smb_vwv2,fsp->fnum); SCVAL(result,smb_vwv3,LOCKING_ANDX_OPLOCK_RELEASE); SCVAL(result,smb_vwv3+1,cmd); return result; } /**************************************************************************** Function to do the waiting before sending a local break. ****************************************************************************/ static void wait_before_sending_break(void) { long wait_time = (long)lp_oplock_break_wait_time(); if (wait_time) { smb_msleep(wait_time); } } /**************************************************************************** Ensure that we have a valid oplock. ****************************************************************************/ static files_struct *initial_break_processing( struct smbd_server_connection *sconn, struct file_id id, unsigned long file_id) { files_struct *fsp = NULL; if( DEBUGLVL( 3 ) ) { dbgtext( "initial_break_processing: called for %s/%u\n", file_id_string_tos(&id), (int)file_id); dbgtext( "Current oplocks_open (exclusive = %d, levelII = %d)\n", exclusive_oplocks_open, level_II_oplocks_open ); } /* * We need to search the file open table for the * entry containing this dev and inode, and ensure * we have an oplock on it. */ fsp = file_find_dif(sconn, id, file_id); if(fsp == NULL) { /* The file could have been closed in the meantime - return success. */ if( DEBUGLVL( 3 ) ) { dbgtext( "initial_break_processing: cannot find open file with " ); dbgtext( "file_id %s gen_id = %lu", file_id_string_tos(&id), file_id); dbgtext( "allowing break to succeed.\n" ); } return NULL; } /* Ensure we have an oplock on the file */ /* * There is a potential race condition in that an oplock could * have been broken due to another udp request, and yet there are * still oplock break messages being sent in the udp message * queue for this file. So return true if we don't have an oplock, * as we may have just freed it. */ if(fsp->oplock_type == NO_OPLOCK) { if( DEBUGLVL( 3 ) ) { dbgtext( "initial_break_processing: file %s ", fsp_str_dbg(fsp)); dbgtext( "(file_id = %s gen_id = %lu) has no oplock.\n", file_id_string_tos(&id), fsp->fh->gen_id ); dbgtext( "Allowing break to succeed regardless.\n" ); } return NULL; } return fsp; } static void oplock_timeout_handler(struct event_context *ctx, struct timed_event *te, struct timeval now, void *private_data) { files_struct *fsp = (files_struct *)private_data; /* Remove the timed event handler. */ TALLOC_FREE(fsp->oplock_timeout); DEBUG(0, ("Oplock break failed for file %s -- replying anyway\n", fsp_str_dbg(fsp))); remove_oplock(fsp); reply_to_oplock_break_requests(fsp); } /******************************************************************* Add a timeout handler waiting for the client reply. *******************************************************************/ static void add_oplock_timeout_handler(files_struct *fsp) { /* * If kernel oplocks already notifies smbds when an oplock break times * out, just return. */ if (koplocks && (koplocks->flags & KOPLOCKS_TIMEOUT_NOTIFICATION)) { return; } if (fsp->oplock_timeout != NULL) { DEBUG(0, ("Logic problem -- have an oplock event hanging " "around\n")); } fsp->oplock_timeout = event_add_timed(server_event_context(), fsp, timeval_current_ofs(OPLOCK_BREAK_TIMEOUT, 0), oplock_timeout_handler, fsp); if (fsp->oplock_timeout == NULL) { DEBUG(0, ("Could not add oplock timeout handler\n")); } } static void send_break_message_smb1(files_struct *fsp, int level) { char *break_msg = new_break_message_smb1(talloc_tos(), fsp, level); if (break_msg == NULL) { exit_server("Could not talloc break_msg\n"); } show_msg(break_msg); if (!srv_send_smb(fsp->conn->sconn, break_msg, false, 0, IS_CONN_ENCRYPTED(fsp->conn), NULL)) { exit_server_cleanly("send_break_message_smb1: " "srv_send_smb failed."); } TALLOC_FREE(break_msg); } void break_level2_to_none_async(files_struct *fsp) { struct smbd_server_connection *sconn = fsp->conn->sconn; if (fsp->oplock_type == NO_OPLOCK) { /* We already got a "break to none" message and we've handled * it. just ignore. */ DEBUG(3, ("process_oplock_async_level2_break_message: already " "broken to none, ignoring.\n")); return; } if (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) { /* Don't tell the client, just downgrade. */ DEBUG(3, ("process_oplock_async_level2_break_message: " "downgrading fake level 2 oplock.\n")); remove_oplock(fsp); return; } /* Ensure we're really at level2 state. */ SMB_ASSERT(fsp->oplock_type == LEVEL_II_OPLOCK); DEBUG(10,("process_oplock_async_level2_break_message: sending break " "to none message for fid %d, file %s\n", fsp->fnum, fsp_str_dbg(fsp))); /* Now send a break to none message to our client. */ if (sconn->using_smb2) { send_break_message_smb2(fsp, OPLOCKLEVEL_NONE); } else { send_break_message_smb1(fsp, OPLOCKLEVEL_NONE); } /* Async level2 request, don't send a reply, just remove the oplock. */ remove_oplock(fsp); } /******************************************************************* This handles the case of a write triggering a break to none message on a level2 oplock. When we get this message we may be in any of three states : NO_OPLOCK, LEVEL_II, FAKE_LEVEL2. We only send a message to the client for LEVEL2. *******************************************************************/ void process_oplock_async_level2_break_message(struct messaging_context *msg_ctx, void *private_data, uint32_t msg_type, struct server_id src, DATA_BLOB *data) { struct smbd_server_connection *sconn; struct share_mode_entry msg; files_struct *fsp; if (data->data == NULL) { DEBUG(0, ("Got NULL buffer\n")); return; } sconn = msg_ctx_to_sconn(msg_ctx); if (sconn == NULL) { DEBUG(1, ("could not find sconn\n")); return; } if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) { DEBUG(0, ("Got invalid msg len %d\n", (int)data->length)); return; } /* De-linearize incoming message. */ message_to_share_mode_entry(&msg, (char *)data->data); DEBUG(10, ("Got oplock async level 2 break message from pid %s: " "%s/%lu\n", procid_str(talloc_tos(), &src), file_id_string_tos(&msg.id), msg.share_file_id)); fsp = initial_break_processing(sconn, msg.id, msg.share_file_id); if (fsp == NULL) { /* We hit a race here. Break messages are sent, and before we * get to process this message, we have closed the file. * No need to reply as this is an async message. */ DEBUG(3, ("process_oplock_async_level2_break_message: Did not find fsp, ignoring\n")); return; } break_level2_to_none_async(fsp); } /******************************************************************* This handles the generic oplock break message from another smbd. *******************************************************************/ static void process_oplock_break_message(struct messaging_context *msg_ctx, void *private_data, uint32_t msg_type, struct server_id src, DATA_BLOB *data) { struct smbd_server_connection *sconn; struct share_mode_entry msg; files_struct *fsp; bool break_to_level2 = False; if (data->data == NULL) { DEBUG(0, ("Got NULL buffer\n")); return; } sconn = msg_ctx_to_sconn(msg_ctx); if (sconn == NULL) { DEBUG(1, ("could not find sconn\n")); return; } if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) { DEBUG(0, ("Got invalid msg len %d\n", (int)data->length)); return; } /* De-linearize incoming message. */ message_to_share_mode_entry(&msg, (char *)data->data); DEBUG(10, ("Got oplock break message from pid %s: %s/%lu\n", procid_str(talloc_tos(), &src), file_id_string_tos(&msg.id), msg.share_file_id)); fsp = initial_break_processing(sconn, msg.id, msg.share_file_id); if (fsp == NULL) { /* We hit a race here. Break messages are sent, and before we * get to process this message, we have closed the file. Reply * with 'ok, oplock broken' */ DEBUG(3, ("Did not find fsp\n")); /* We just send the same message back. */ messaging_send_buf(msg_ctx, src, MSG_SMB_BREAK_RESPONSE, (uint8 *)data->data, MSG_SMB_SHARE_MODE_ENTRY_SIZE); return; } if (fsp->sent_oplock_break != NO_BREAK_SENT) { /* Remember we have to inform the requesting PID when the * client replies */ msg.pid = src; ADD_TO_ARRAY(NULL, struct share_mode_entry, msg, &fsp->pending_break_messages, &fsp->num_pending_break_messages); return; } if (EXCLUSIVE_OPLOCK_TYPE(msg.op_type) && !EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) { DEBUG(3, ("Already downgraded oplock on %s: %s\n", file_id_string_tos(&fsp->file_id), fsp_str_dbg(fsp))); /* We just send the same message back. */ messaging_send_buf(msg_ctx, src, MSG_SMB_BREAK_RESPONSE, (uint8 *)data->data, MSG_SMB_SHARE_MODE_ENTRY_SIZE); return; } if ((global_client_caps & CAP_LEVEL_II_OPLOCKS) && !(msg.op_type & FORCE_OPLOCK_BREAK_TO_NONE) && !(koplocks && !(koplocks->flags & KOPLOCKS_LEVEL2_SUPPORTED)) && lp_level2_oplocks(SNUM(fsp->conn))) { break_to_level2 = True; } /* Need to wait before sending a break message if we sent ourselves this message. */ if (procid_is_me(&src)) { wait_before_sending_break(); } if (sconn->using_smb2) { send_break_message_smb2(fsp, break_to_level2 ? OPLOCKLEVEL_II : OPLOCKLEVEL_NONE); } else { send_break_message_smb1(fsp, break_to_level2 ? OPLOCKLEVEL_II : OPLOCKLEVEL_NONE); } fsp->sent_oplock_break = break_to_level2 ? LEVEL_II_BREAK_SENT:BREAK_TO_NONE_SENT; msg.pid = src; ADD_TO_ARRAY(NULL, struct share_mode_entry, msg, &fsp->pending_break_messages, &fsp->num_pending_break_messages); add_oplock_timeout_handler(fsp); } /******************************************************************* This handles the kernel oplock break message. *******************************************************************/ static void process_kernel_oplock_break(struct messaging_context *msg_ctx, void *private_data, uint32_t msg_type, struct server_id src, DATA_BLOB *data) { struct smbd_server_connection *sconn; struct file_id id; unsigned long file_id; files_struct *fsp; if (data->data == NULL) { DEBUG(0, ("Got NULL buffer\n")); return; } if (data->length != MSG_SMB_KERNEL_BREAK_SIZE) { DEBUG(0, ("Got invalid msg len %d\n", (int)data->length)); return; } sconn = msg_ctx_to_sconn(msg_ctx); if (sconn == NULL) { DEBUG(1, ("could not find sconn\n")); return; } /* Pull the data from the message. */ pull_file_id_24((char *)data->data, &id); file_id = (unsigned long)IVAL(data->data, 24); DEBUG(10, ("Got kernel oplock break message from pid %s: %s/%u\n", procid_str(talloc_tos(), &src), file_id_string_tos(&id), (unsigned int)file_id)); fsp = initial_break_processing(sconn, id, file_id); if (fsp == NULL) { DEBUG(3, ("Got a kernel oplock break message for a file " "I don't know about\n")); return; } if (fsp->sent_oplock_break != NO_BREAK_SENT) { /* This is ok, kernel oplocks come in completely async */ DEBUG(3, ("Got a kernel oplock request while waiting for a " "break reply\n")); return; } if (sconn->using_smb2) { send_break_message_smb2(fsp, OPLOCKLEVEL_NONE); } else { send_break_message_smb1(fsp, OPLOCKLEVEL_NONE); } fsp->sent_oplock_break = BREAK_TO_NONE_SENT; add_oplock_timeout_handler(fsp); } void reply_to_oplock_break_requests(files_struct *fsp) { int i; /* * If kernel oplocks already notifies smbds when oplocks are * broken/removed, just return. */ if (koplocks && (koplocks->flags & KOPLOCKS_OPLOCK_BROKEN_NOTIFICATION)) { return; } for (i=0; i<fsp->num_pending_break_messages; i++) { struct share_mode_entry *e = &fsp->pending_break_messages[i]; char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE]; share_mode_entry_to_message(msg, e); messaging_send_buf(fsp->conn->sconn->msg_ctx, e->pid, MSG_SMB_BREAK_RESPONSE, (uint8 *)msg, MSG_SMB_SHARE_MODE_ENTRY_SIZE); } SAFE_FREE(fsp->pending_break_messages); fsp->num_pending_break_messages = 0; if (fsp->oplock_timeout != NULL) { /* Remove the timed event handler. */ TALLOC_FREE(fsp->oplock_timeout); fsp->oplock_timeout = NULL; } return; } static void process_oplock_break_response(struct messaging_context *msg_ctx, void *private_data, uint32_t msg_type, struct server_id src, DATA_BLOB *data) { struct share_mode_entry msg; if (data->data == NULL) { DEBUG(0, ("Got NULL buffer\n")); return; } if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) { DEBUG(0, ("Got invalid msg len %u\n", (unsigned int)data->length)); return; } /* De-linearize incoming message. */ message_to_share_mode_entry(&msg, (char *)data->data); DEBUG(10, ("Got oplock break response from pid %s: %s/%lu mid %llu\n", procid_str(talloc_tos(), &src), file_id_string_tos(&msg.id), msg.share_file_id, (unsigned long long)msg.op_mid)); schedule_deferred_open_message_smb(msg.op_mid); } static void process_open_retry_message(struct messaging_context *msg_ctx, void *private_data, uint32_t msg_type, struct server_id src, DATA_BLOB *data) { struct share_mode_entry msg; if (data->data == NULL) { DEBUG(0, ("Got NULL buffer\n")); return; } if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) { DEBUG(0, ("Got invalid msg len %d\n", (int)data->length)); return; } /* De-linearize incoming message. */ message_to_share_mode_entry(&msg, (char *)data->data); DEBUG(10, ("Got open retry msg from pid %s: %s mid %llu\n", procid_str(talloc_tos(), &src), file_id_string_tos(&msg.id), (unsigned long long)msg.op_mid)); schedule_deferred_open_message_smb(msg.op_mid); } /**************************************************************************** This function is called on any file modification or lock request. If a file is level 2 oplocked then it must tell all other level 2 holders to break to none. ****************************************************************************/ static void contend_level2_oplocks_begin_default(files_struct *fsp, enum level2_contention_type type) { int i; struct share_mode_lock *lck; /* * If this file is level II oplocked then we need * to grab the shared memory lock and inform all * other files with a level II lock that they need * to flush their read caches. We keep the lock over * the shared memory area whilst doing this. */ if (!LEVEL_II_OPLOCK_TYPE(fsp->oplock_type)) return; lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL, NULL); if (lck == NULL) { DEBUG(0,("release_level_2_oplocks_on_change: failed to lock " "share mode entry for file %s.\n", fsp_str_dbg(fsp))); return; } DEBUG(10,("release_level_2_oplocks_on_change: num_share_modes = %d\n", lck->num_share_modes )); for(i = 0; i < lck->num_share_modes; i++) { struct share_mode_entry *share_entry = &lck->share_modes[i]; char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE]; if (!is_valid_share_mode_entry(share_entry)) { continue; } /* * As there could have been multiple writes waiting at the * lock_share_entry gate we may not be the first to * enter. Hence the state of the op_types in the share mode * entries may be partly NO_OPLOCK and partly LEVEL_II or FAKE_LEVEL_II * oplock. It will do no harm to re-send break messages to * those smbd's that are still waiting their turn to remove * their LEVEL_II state, and also no harm to ignore existing * NO_OPLOCK states. JRA. */ DEBUG(10,("release_level_2_oplocks_on_change: " "share_entry[%i]->op_type == %d\n", i, share_entry->op_type )); if (share_entry->op_type == NO_OPLOCK) { continue; } /* Paranoia .... */ if (EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) { DEBUG(0,("release_level_2_oplocks_on_change: PANIC. " "share mode entry %d is an exlusive " "oplock !\n", i )); TALLOC_FREE(lck); abort(); } share_mode_entry_to_message(msg, share_entry); /* * Deal with a race condition when breaking level2 * oplocks. Don't send all the messages and release * the lock, this allows someone else to come in and * get a level2 lock before any of the messages are * processed, and thus miss getting a break message. * Ensure at least one entry (the one we're breaking) * is processed immediately under the lock and becomes * set as NO_OPLOCK to stop any waiter getting a level2. * Bugid #5980. */ if (procid_is_me(&share_entry->pid)) { struct files_struct *cur_fsp = initial_break_processing(fsp->conn->sconn, share_entry->id, share_entry->share_file_id); wait_before_sending_break(); if (cur_fsp != NULL) { break_level2_to_none_async(cur_fsp); } else { DEBUG(3, ("release_level_2_oplocks_on_change: " "Did not find fsp, ignoring\n")); } } else { messaging_send_buf(fsp->conn->sconn->msg_ctx, share_entry->pid, MSG_SMB_ASYNC_LEVEL2_BREAK, (uint8 *)msg, MSG_SMB_SHARE_MODE_ENTRY_SIZE); } } /* We let the message receivers handle removing the oplock state in the share mode lock db. */ TALLOC_FREE(lck); } void contend_level2_oplocks_begin(files_struct *fsp, enum level2_contention_type type) { if (koplocks && koplocks->ops->contend_level2_oplocks_begin) { koplocks->ops->contend_level2_oplocks_begin(fsp, type); return; } contend_level2_oplocks_begin_default(fsp, type); } void contend_level2_oplocks_end(files_struct *fsp, enum level2_contention_type type) { /* Only kernel oplocks implement this so far */ if (koplocks && koplocks->ops->contend_level2_oplocks_end) { koplocks->ops->contend_level2_oplocks_end(fsp, type); } } /**************************************************************************** Linearize a share mode entry struct to an internal oplock break message. ****************************************************************************/ void share_mode_entry_to_message(char *msg, const struct share_mode_entry *e) { SIVAL(msg,OP_BREAK_MSG_PID_OFFSET,(uint32)e->pid.pid); SBVAL(msg,OP_BREAK_MSG_MID_OFFSET,e->op_mid); SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,e->op_type); SIVAL(msg,OP_BREAK_MSG_ACCESS_MASK_OFFSET,e->access_mask); SIVAL(msg,OP_BREAK_MSG_SHARE_ACCESS_OFFSET,e->share_access); SIVAL(msg,OP_BREAK_MSG_PRIV_OFFSET,e->private_options); SIVAL(msg,OP_BREAK_MSG_TIME_SEC_OFFSET,(uint32_t)e->time.tv_sec); SIVAL(msg,OP_BREAK_MSG_TIME_USEC_OFFSET,(uint32_t)e->time.tv_usec); push_file_id_24(msg+OP_BREAK_MSG_DEV_OFFSET, &e->id); SIVAL(msg,OP_BREAK_MSG_FILE_ID_OFFSET,e->share_file_id); SIVAL(msg,OP_BREAK_MSG_UID_OFFSET,e->uid); SSVAL(msg,OP_BREAK_MSG_FLAGS_OFFSET,e->flags); SIVAL(msg,OP_BREAK_MSG_NAME_HASH_OFFSET,e->name_hash); SIVAL(msg,OP_BREAK_MSG_VNN_OFFSET,e->pid.vnn); } /**************************************************************************** De-linearize an internal oplock break message to a share mode entry struct. ****************************************************************************/ void message_to_share_mode_entry(struct share_mode_entry *e, char *msg) { e->pid.pid = (pid_t)IVAL(msg,OP_BREAK_MSG_PID_OFFSET); e->op_mid = BVAL(msg,OP_BREAK_MSG_MID_OFFSET); e->op_type = SVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET); e->access_mask = IVAL(msg,OP_BREAK_MSG_ACCESS_MASK_OFFSET); e->share_access = IVAL(msg,OP_BREAK_MSG_SHARE_ACCESS_OFFSET); e->private_options = IVAL(msg,OP_BREAK_MSG_PRIV_OFFSET); e->time.tv_sec = (time_t)IVAL(msg,OP_BREAK_MSG_TIME_SEC_OFFSET); e->time.tv_usec = (int)IVAL(msg,OP_BREAK_MSG_TIME_USEC_OFFSET); pull_file_id_24(msg+OP_BREAK_MSG_DEV_OFFSET, &e->id); e->share_file_id = (unsigned long)IVAL(msg,OP_BREAK_MSG_FILE_ID_OFFSET); e->uid = (uint32)IVAL(msg,OP_BREAK_MSG_UID_OFFSET); e->flags = (uint16)SVAL(msg,OP_BREAK_MSG_FLAGS_OFFSET); e->name_hash = IVAL(msg,OP_BREAK_MSG_NAME_HASH_OFFSET); e->pid.vnn = IVAL(msg,OP_BREAK_MSG_VNN_OFFSET); } /**************************************************************************** Setup oplocks for this process. ****************************************************************************/ bool init_oplocks(struct messaging_context *msg_ctx) { DEBUG(3,("init_oplocks: initializing messages.\n")); messaging_register(msg_ctx, NULL, MSG_SMB_BREAK_REQUEST, process_oplock_break_message); messaging_register(msg_ctx, NULL, MSG_SMB_ASYNC_LEVEL2_BREAK, process_oplock_async_level2_break_message); messaging_register(msg_ctx, NULL, MSG_SMB_BREAK_RESPONSE, process_oplock_break_response); messaging_register(msg_ctx, NULL, MSG_SMB_KERNEL_BREAK, process_kernel_oplock_break); messaging_register(msg_ctx, NULL, MSG_SMB_OPEN_RETRY, process_open_retry_message); if (lp_kernel_oplocks()) { #if HAVE_KERNEL_OPLOCKS_IRIX koplocks = irix_init_kernel_oplocks(NULL); #elif HAVE_KERNEL_OPLOCKS_LINUX koplocks = linux_init_kernel_oplocks(NULL); #elif HAVE_ONEFS #error Isilon, please check if the NULL context is okay here. Thanks! koplocks = onefs_init_kernel_oplocks(NULL); #endif } return True; }