From 16d2c2fa58c57539a9b540eb93825806caaea0b5 Mon Sep 17 00:00:00 2001 From: Tim Prouty Date: Tue, 27 Jan 2009 16:13:35 -0800 Subject: s3 OneFS: Add kernel oplocks implementation A few functions in oplocks_onefs.c need to be accessed from the onefs vfs module. It would be ideal if oplocks were implemented at the vfs layer, but since they aren't yet, a new header is added to source3/include to make these functions available to the onefs vfs module. oplocks_onefs.o doesn't need to be linked into the onefs vfs module explicitly, since it is already linked into smbd by default. --- source3/smbd/oplock_onefs.c | 798 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 798 insertions(+) create mode 100644 source3/smbd/oplock_onefs.c (limited to 'source3/smbd/oplock_onefs.c') diff --git a/source3/smbd/oplock_onefs.c b/source3/smbd/oplock_onefs.c new file mode 100644 index 0000000000..0908ce4386 --- /dev/null +++ b/source3/smbd/oplock_onefs.c @@ -0,0 +1,798 @@ +/* + * Unix SMB/CIFS implementation. + * Support for OneFS kernel oplocks + * + * Copyright (C) Volker Lendecke 2007 + * Copyright (C) Tim Prouty, 2009 + * + * 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 . + */ + +#define DBGC_CLASS DBGC_LOCKING + +#include "includes.h" + +#if HAVE_ONEFS +#include "oplock_onefs.h" +#include "smbd/globals.h" + +#include +#include +#include + +struct onefs_oplocks_context { + struct kernel_oplocks *ctx; + const struct oplocks_event_ops *onefs_ops; + int onefs_event_fd; + struct fd_event *read_fde; +}; + +enum onefs_callback_state { + ONEFS_OPEN_FILE, + ONEFS_WAITING_FOR_OPLOCK +}; + +struct onefs_callback_record { + struct onefs_callback_record *prev, *next; + uint64_t id; + enum onefs_callback_state state; + union { + files_struct *fsp; /* ONEFS_OPEN_FILE */ + uint16_t mid; /* ONEFS_WAITING_FOR_OPLOCK */ + } data; +}; + +/** + * Internal list of files (along with additional state) that have outstanding + * oplocks or requests for oplocks. + */ +struct onefs_callback_record *callback_recs; + +/** + * Convert a onefs_callback_record to a string. + */ +static char *onefs_callback_record_str_static(const struct onefs_callback_record *r) +{ + static fstring result; + + if (r == NULL) { + fstrcpy(result, "NULL callback record"); + return result; + } + + switch (r->state) { + case ONEFS_OPEN_FILE: + fstr_sprintf(result, "cb record %llu for file %s", + r->id, r->data.fsp->fsp_name); + break; + case ONEFS_WAITING_FOR_OPLOCK: + fstr_sprintf(result, "cb record %llu for pending mid %d", + r->id, (int)r->data.mid); + break; + default: + fstr_sprintf(result, "cb record %llu unknown state %d", + r->id, r->state); + break; + } + + return result; +} + +/** + * Traverse the list of onefs_callback_records and print all entries. + */ +static void debug_cb_records(const char *fn) +{ + struct onefs_callback_record *rec; + + if (DEBUGLEVEL < 10) + return; + + DEBUG(10, ("cb records (%s):\n", fn)); + + for (rec = callback_recs; rec; rec = rec->next) { + DEBUGADD(10, ("%s\n", onefs_callback_record_str_static(rec))); + } +} + +/** + * Find a callback record in the list of outstanding oplock operations. + * + * Once n ifs_createfile requests an oplock on a file, the kernel communicates + * with samba via the oplock event channel by sending events that reference an + * id. This function maps that id to the onefs_callback_record that was + * created for it during the initial setup on open (onefs_oplock_wait_record). + * When a matching id is found in the onefs_callback_record list, the + * callback_type is checked to make sure the record is in in the correct + * state. + */ +static struct onefs_callback_record *onefs_find_cb(uint64_t id, + enum onefs_callback_state expected_state) +{ + struct onefs_callback_record *rec; + + debug_cb_records("onefs_find_cb"); + + for (rec = callback_recs; rec; rec = rec->next) { + if (rec->id == id) { + DEBUG(10, ("found %s\n", + onefs_callback_record_str_static(rec))); + break; + } + } + + if (rec == NULL) { + DEBUG(5, ("Could not find callback record for id %llu\n", id)); + return NULL; + } + + if (rec->state != expected_state) { + DEBUG(0, ("Expected cb type %d, got %s", expected_state, + onefs_callback_record_str_static(rec))); + SMB_ASSERT(0); + return NULL; + } + + return rec; +} + +/** + * Remove and free a callback record from the callback record list. + */ +void destroy_onefs_callback_record(uint64_t id) +{ + struct onefs_callback_record *rec; + + debug_cb_records("destroy_onefs_callback_record"); + + if (id == 0) { + DEBUG(10, ("destroy_onefs_callback_record: Nothing to " + "destroy\n")); + return; + } + + for (rec = callback_recs; rec; rec = rec->next) { + if (rec->id == id) { + DLIST_REMOVE(callback_recs, rec); + SAFE_FREE(rec); + DEBUG(10, ("removed cb rec %llu\n", id)); + return; + } + } + + DEBUG(0, ("Could not find cb rec %llu to delete", id)); + SMB_ASSERT(0); +} + +/** + * Initialize a callback record and add it to the list of outstanding callback + * records. + * + * This is called in the open path before ifs_createfile so an id can be + * passed in. Each callback record can be in one of two states: + * + * 1. WAITING_FOR_OPLOCK: This is the initial state for all callback + * records. If ifs_createfile can be completed syncronously without needing + * to break any level I oplocks, the state is transitioned to OPEN_FILE. + * Otherwise ifs_createfile will finish asynchronously and the open is + * deferred. When the necessary level I opocks have been broken, and the + * open can be done, an event is sent by the kernel on the oplock event + * channel, which is handled by semlock_available_handler. At this point + * the deferred open is retried. Unless a level I oplock was acquired by + * another client, ifs_createfile will now complete synchronously. + * + * 2. OPEN_FILE: Once ifs_createfile completes, the callback record is + * transitioned to this state via onefs_set_oplock_callback. + */ +uint64_t onefs_oplock_wait_record(uint16_t mid) +{ + struct onefs_callback_record *result; + static uint64_t id_generator = 0; + + if (!(result = SMB_MALLOC_P(struct onefs_callback_record))) { + DEBUG(0, ("talloc failed\n")); + return 0; + } + + memset(result, '\0', sizeof(result)); + + id_generator += 1; + if (id_generator == 0) { + /* Wow, that's a long-running smbd... */ + id_generator += 1; + } + + result->id = id_generator; + + result->state = ONEFS_WAITING_FOR_OPLOCK; + result->data.mid = mid; + DLIST_ADD(callback_recs, result); + + DEBUG(10, ("New cb rec %llu created\n", result->id)); + + return result->id; +} + +/** + * Transition the callback record state to OPEN_FILE. + * + * This is called after the file is opened and an fsp struct has been + * allocated. The mid is dropped in favor of storing the fsp. + */ +void onefs_set_oplock_callback(uint64_t id, files_struct *fsp) +{ + struct onefs_callback_record *cb; + char *msg; + + DEBUG(10, ("onefs_set_oplock_callback called for cb rec %llu\n", id)); + + if (!(cb = onefs_find_cb(id, ONEFS_WAITING_FOR_OPLOCK))) { + if (asprintf(&msg, "Got invalid callback %lld\n", id) != -1) { + smb_panic(msg); + } + smb_panic("Got invalid callback id\n"); + } + + /* + * Paranoia check + */ + if (open_was_deferred(cb->data.mid)) { + if (asprintf(&msg, "Trying to upgrade callback for deferred " + "open mid=%d\n", cb->data.mid) != -1) { + smb_panic(msg); + } + smb_panic("Trying to upgrade callback for deferred open " + "mid\n"); + } + + cb->state = ONEFS_OPEN_FILE; + cb->data.fsp = fsp; +} + +/** + * Using a callback record, initialize a share mode entry to pass to + * share_mode_entry_to_message to send samba IPC messages. + */ +static void init_share_mode_entry(struct share_mode_entry *sme, + struct onefs_callback_record *cb, + int op_type) +{ + ZERO_STRUCT(*sme); + + sme->pid = procid_self(); + sme->op_type = op_type; + sme->id = cb->data.fsp->file_id; + sme->share_file_id = cb->data.fsp->fh->gen_id; +} + +/** + * Callback when a break-to-none event is received from the kernel. + * + * On OneFS level 1 oplocks are always broken to level 2 first, therefore an + * async level 2 break message is always sent when breaking to none. The + * downside of this is that OneFS currently has no way to express breaking + * directly from level 1 to none. + */ +static void oplock_break_to_none_handler(uint64_t id) +{ + struct onefs_callback_record *cb; + struct share_mode_entry sme; + char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE]; + + DEBUG(10, ("oplock_break_to_none_handler called for id %llu\n", id)); + + if (!(cb = onefs_find_cb(id, ONEFS_OPEN_FILE))) { + DEBUG(3, ("oplock_break_to_none_handler: could not find " + "callback id %llu\n", id)); + return; + } + + DEBUG(10, ("oplock_break_to_none_handler called for file %s\n", + cb->data.fsp->fsp_name)); + + init_share_mode_entry(&sme, cb, FORCE_OPLOCK_BREAK_TO_NONE); + share_mode_entry_to_message(msg, &sme); + messaging_send_buf(smbd_messaging_context(), + sme.pid, + MSG_SMB_ASYNC_LEVEL2_BREAK, + (uint8_t *)msg, + MSG_SMB_SHARE_MODE_ENTRY_SIZE); + + /* + * We could still receive an OPLOCK_REVOKED message, so keep the + * oplock_callback_id around. + */ +} + +/** + * Callback when a break-to-level2 event is received from the kernel. + * + * Breaks from level 1 to level 2. + */ +static void oplock_break_to_level_two_handler(uint64_t id) +{ + struct onefs_callback_record *cb; + struct share_mode_entry sme; + char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE]; + + DEBUG(10, ("oplock_break_to_level_two_handler called for id %llu\n", + id)); + + if (!(cb = onefs_find_cb(id, ONEFS_OPEN_FILE))) { + DEBUG(3, ("oplock_break_to_level_two_handler: could not find " + "callback id %llu\n", id)); + return; + } + + DEBUG(10, ("oplock_break_to_level_two_handler called for file %s\n", + cb->data.fsp->fsp_name)); + + init_share_mode_entry(&sme, cb, LEVEL_II_OPLOCK); + share_mode_entry_to_message(msg, &sme); + messaging_send_buf(smbd_messaging_context(), + sme.pid, + MSG_SMB_BREAK_REQUEST, + (uint8_t *)msg, + MSG_SMB_SHARE_MODE_ENTRY_SIZE); + + /* + * We could still receive an OPLOCK_REVOKED or OPLOCK_BREAK_TO_NONE + * message, so keep the oplock_callback_id around. + */ +} + +/** + * Revoke an oplock from an unresponsive client. + * + * The kernel will send this message when it times out waiting for a level 1 + * oplock break to be acknowledged by the client. The oplock is then + * immediately removed. + */ +static void oplock_revoked_handler(uint64_t id) +{ + struct onefs_callback_record *cb; + files_struct *fsp = NULL; + + DEBUG(10, ("oplock_revoked_handler called for id %llu\n", id)); + + if (!(cb = onefs_find_cb(id, ONEFS_OPEN_FILE))) { + DEBUG(3, ("oplock_revoked_handler: could not find " + "callback id %llu\n", id)); + return; + } + + fsp = cb->data.fsp; + + SMB_ASSERT(fsp->oplock_timeout == NULL); + + DEBUG(0,("Level 1 oplock break failed for file %s. Forcefully " + "revoking oplock\n", fsp->fsp_name)); + + global_client_failed_oplock_break = True; + remove_oplock(fsp); + + /* + * cb record is cleaned up in fsp ext data destructor on close, so + * leave it in the list. + */ +} + +/** + * Asynchronous ifs_createfile callback + * + * If ifs_createfile had to asynchronously break any oplocks, this function is + * called when the kernel sends an event that the open can be retried. + */ +static void semlock_available_handler(uint64_t id) +{ + struct onefs_callback_record *cb; + + DEBUG(10, ("semlock_available_handler called: %llu\n", id)); + + if (!(cb = onefs_find_cb(id, ONEFS_WAITING_FOR_OPLOCK))) { + DEBUG(5, ("semlock_available_handler: Did not find callback " + "%llu\n", id)); + return; + } + + DEBUG(10, ("Got semlock available for mid %d\n", cb->data.mid)); + + /* Paranoia check */ + if (!(open_was_deferred(cb->data.mid))) { + char *msg; + if (asprintf(&msg, "Semlock available on an open that wasn't " + "deferred: %s\n", + onefs_callback_record_str_static(cb)) != -1) { + smb_panic(msg); + } + smb_panic("Semlock available on an open that wasn't " + "deferred\n"); + } + + schedule_deferred_open_smb_message(cb->data.mid); + + /* Cleanup the callback record since the open will be retried. */ + destroy_onefs_callback_record(id); + + return; +} + +/** + * Asynchronous ifs_createfile failure callback + * + * If ifs_createfile had to asynchronously break any oplocks, but an error was + * encountered in the kernel, the open will be retried with the state->failed + * set to true. This will prompt the open path to send an INTERNAL_ERROR + * error message to the client. + */ +static void semlock_async_failure_handler(uint64_t id) +{ + struct onefs_callback_record *cb; + struct pending_message_list *pml; + struct deferred_open_record *state; + + DEBUG(1, ("semlock_async_failure_handler called: %llu\n", id)); + + if (!(cb = onefs_find_cb(id, ONEFS_WAITING_FOR_OPLOCK))) { + DEBUG(5, ("semlock_async_failure_handler: Did not find callback " + "%llu\n", id)); + return; + } + + DEBUG(1, ("Got semlock_async_failure message for mid %d\n", cb->data.mid)); + + /* Paranoia check */ + if (!(open_was_deferred(cb->data.mid))) { + char *msg; + if (asprintf(&msg, "Semlock failure on an open that wasn't " + "deferred: %s\n", + onefs_callback_record_str_static(cb)) != -1) { + smb_panic(msg); + } + smb_panic("Semlock failure on an open that wasn't deferred\n"); + } + + /* Find the actual deferred open record. */ + if (!(pml = get_open_deferred_message(cb->data.mid))) { + DEBUG(0, ("Could not find deferred request for " + "mid %d\n", cb->data.mid)); + destroy_onefs_callback_record(id); + return; + } + state = (struct deferred_open_record *)pml->private_data.data; + + /* Update to failed so the client can be notified on retried open. */ + state->failed = true; + + /* Schedule deferred open for immediate retry. */ + schedule_deferred_open_smb_message(cb->data.mid); + + /* Cleanup the callback record here since the open will be retried. */ + destroy_onefs_callback_record(id); + + return; +} + +/** + * OneFS acquires all oplocks via ifs_createfile, so this is a no-op. + */ +static bool onefs_set_kernel_oplock(struct kernel_oplocks *_ctx, + files_struct *fsp, int oplock_type) { + return true; +} + +/** + * Release the kernel oplock. + */ +static void onefs_release_kernel_oplock(struct kernel_oplocks *_ctx, + files_struct *fsp, int oplock_type) +{ + enum oplock_type oplock = onefs_samba_oplock_to_oplock(oplock_type); + + DEBUG(10, ("onefs_release_kernel_oplock: Releasing %s to type %s\n", + fsp->fsp_name, onefs_oplock_str(oplock))); + + if (fsp->fh->fd == -1) { + DEBUG(1, ("no fd\n")); + return; + } + + /* Downgrade oplock to either SHARED or NONE. */ + if (ifs_oplock_downgrade(fsp->fh->fd, oplock)) { + DEBUG(1,("ifs_oplock_downgrade failed: %s\n", + strerror(errno))); + } +} + +/** + * Wrap ifs_semlock_write so it is only called on operations that aren't + * already contended in the kernel. + */ +static void onefs_semlock_write(int fd, enum level2_contention_type type, + enum semlock_operation semlock_op) +{ + int ret; + + switch (type) { + case LEVEL2_CONTEND_ALLOC_GROW: + case LEVEL2_CONTEND_WINDOWS_BRL: + case LEVEL2_CONTEND_POSIX_BRL: + DEBUG(10, ("Taking %d write semlock for cmd %d on fd: %d\n", + semlock_op, type, fd)); + ret = ifs_semlock_write(fd, semlock_op); + if (ret) { + DEBUG(0,("ifs_semlock_write failed taking %d write " + "semlock for cmd %d on fd: %d: %s", + semlock_op, type, fd, strerror(errno))); + } + break; + default: + DEBUG(10, ("Skipping write semlock for cmd %d on fd: %d\n", + type, fd)); + } +} + +/** + * Contend level 2 oplocks in the kernel and smbd. + * + * Taking a write semlock will contend all level 2 oplocks in all smbds across + * the cluster except the fsp's own level 2 oplock. This lack of + * self-contention is a limitation of the current OneFS kernel oplocks + * implementation. Luckily it is easy to contend our own level 2 oplock by + * iterating the share mode entries and only breaking the oplock if the pid + * matches our's. + */ +static void onefs_contend_level2_oplocks_begin(files_struct *fsp, + enum level2_contention_type type) +{ + int i; + struct share_mode_lock *lck; + + /* Take care of level 2 kernel contention. */ + onefs_semlock_write(fsp->fh->fd, type, SEMLOCK_LOCK); + + /* + * 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,("onefs_contend_level2_oplocks_begin: failed to lock " + "share mode entry for file %s.\n", fsp->fsp_name )); + return; + } + + DEBUG(10,("onefs_contend_level2_oplocks_begin: 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; + } + + DEBUG(10,("onefs_contend_level2_oplocks_begin: " + "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,("onefs_contend_level2_oplocks_begin: PANIC. " + "share mode entry %d is an exlusive " + "oplock !\n", i )); + TALLOC_FREE(lck); + abort(); + } + + share_mode_entry_to_message(msg, share_entry); + + /* + * Only contend our own level 2 oplock. The other processes + * will be get break events from the kernel. + */ + if (procid_is_me(&share_entry->pid)) { + DATA_BLOB blob = data_blob_const(msg, + MSG_SMB_SHARE_MODE_ENTRY_SIZE); + process_oplock_async_level2_break_message( + smbd_messaging_context(), + NULL, + MSG_SMB_ASYNC_LEVEL2_BREAK, + share_entry->pid, + &blob); + } + } + + /* We let the message receivers handle removing the oplock state + in the share mode lock db. */ + + TALLOC_FREE(lck); +} + +/** + * Unlock the write semlock when the level 2 contending operation ends. + */ +static void onefs_contend_level2_oplocks_end(files_struct *fsp, + enum level2_contention_type type) +{ + /* Take care of level 2 kernel contention. */ + onefs_semlock_write(fsp->fh->fd, type, SEMLOCK_UNLOCK); +} + +/** + * Return string value of onefs oplock types. + */ +const char *onefs_oplock_str(enum oplock_type onefs_oplock_type) +{ + switch (onefs_oplock_type) { + case OPLOCK_NONE: + return "OPLOCK_NONE"; + case OPLOCK_EXCLUSIVE: + return "OPLOCK_EXCLUSIVE"; + case OPLOCK_BATCH: + return "OPLOCK_BATCH"; + case OPLOCK_SHARED: + return "OPLOCK_SHARED"; + default: + break; + } + return "UNKNOWN"; +} + +/** + * Convert from onefs to samba oplock. + */ +int onefs_oplock_to_samba_oplock(enum oplock_type onefs_oplock) +{ + switch (onefs_oplock) { + case OPLOCK_NONE: + return NO_OPLOCK; + case OPLOCK_EXCLUSIVE: + return EXCLUSIVE_OPLOCK; + case OPLOCK_BATCH: + return BATCH_OPLOCK; + case OPLOCK_SHARED: + return LEVEL_II_OPLOCK; + default: + DEBUG(0, ("unknown oplock type %d found\n", onefs_oplock)); + break; + } + return NO_OPLOCK; +} + +/** + * Convert from samba to onefs oplock. + */ +enum oplock_type onefs_samba_oplock_to_oplock(int samba_oplock_type) +{ + if (BATCH_OPLOCK_TYPE(samba_oplock_type)) return OPLOCK_BATCH; + if (EXCLUSIVE_OPLOCK_TYPE(samba_oplock_type)) return OPLOCK_EXCLUSIVE; + if (LEVEL_II_OPLOCK_TYPE(samba_oplock_type)) return OPLOCK_SHARED; + return OPLOCK_NONE; +} + +/** + * Oplock event handler. + * + * Call into the event system dispatcher to handle each event. + */ +static void onefs_oplocks_read_fde_handler(struct event_context *ev, + struct fd_event *fde, + uint16_t flags, + void *private_data) +{ + struct onefs_oplocks_context *ctx = + talloc_get_type(private_data, struct onefs_oplocks_context); + + if (oplocks_event_dispatcher(ctx->onefs_ops)) { + DEBUG(0, ("oplocks_event_dispatcher failed: %s\n", + strerror(errno))); + } +} + +/** + * Setup kernel oplocks + */ +static const struct kernel_oplocks_ops onefs_koplocks_ops = { + .set_oplock = onefs_set_kernel_oplock, + .release_oplock = onefs_release_kernel_oplock, + .contend_level2_oplocks_begin = onefs_contend_level2_oplocks_begin, + .contend_level2_oplocks_end = onefs_contend_level2_oplocks_end, +}; + +static const struct oplocks_event_ops onefs_dispatch_ops = { + .oplock_break_to_none = oplock_break_to_none_handler, + .oplock_break_to_level_two = oplock_break_to_level_two_handler, + .oplock_revoked = oplock_revoked_handler, + .semlock_available = semlock_available_handler, + .semlock_async_failure = semlock_async_failure_handler, +}; + +struct kernel_oplocks *onefs_init_kernel_oplocks(TALLOC_CTX *mem_ctx) +{ + struct kernel_oplocks *_ctx = NULL; + struct onefs_oplocks_context *ctx = NULL; + struct procoptions po = PROCOPTIONS_INIT; + + DEBUG(10, ("onefs_init_kernel_oplocks called\n")); + + /* Set the non-blocking proc flag */ + po.po_flags_on |= P_NON_BLOCKING_SEMLOCK; + if (setprocoptions(&po) != 0) { + DEBUG(0, ("setprocoptions failed: %s.\n", strerror(errno))); + goto err_out; + } + + /* Setup the oplock contexts */ + _ctx = talloc_zero(mem_ctx, struct kernel_oplocks); + if (!_ctx) { + goto err_out; + } + + ctx = talloc_zero(_ctx, struct onefs_oplocks_context); + if (!ctx) { + goto err_out; + } + + _ctx->ops = &onefs_koplocks_ops; + _ctx->flags = (KOPLOCKS_LEVEL2_SUPPORTED | + KOPLOCKS_DEFERRED_OPEN_NOTIFICATION | + KOPLOCKS_TIMEOUT_NOTIFICATION | + KOPLOCKS_OPLOCK_BROKEN_NOTIFICATION); + _ctx->private_data = ctx; + ctx->ctx = _ctx; + ctx->onefs_ops = &onefs_dispatch_ops; + + /* Register an kernel event channel for oplocks */ + ctx->onefs_event_fd = oplocks_event_register(); + if (ctx->onefs_event_fd == -1) { + DEBUG(0, ("oplocks_event_register failed: %s\n", + strerror(errno))); + goto err_out; + } + + DEBUG(10, ("oplock event_fd = %d\n", ctx->onefs_event_fd)); + + /* Register the oplock event_fd with samba's event system */ + ctx->read_fde = event_add_fd(smbd_event_context(), + ctx, + ctx->onefs_event_fd, + EVENT_FD_READ, + onefs_oplocks_read_fde_handler, + ctx); + return _ctx; + + err_out: + talloc_free(_ctx); + talloc_free(ctx); + return NULL; +} + +#else + void oplock_onefs_dummy(void); + void oplock_onefs_dummy(void) {} +#endif /* HAVE_ONEFS */ -- cgit