diff options
Diffstat (limited to 'source3/smbd')
| -rw-r--r-- | source3/smbd/globals.c | 9 | ||||
| -rw-r--r-- | source3/smbd/globals.h | 6 | ||||
| -rw-r--r-- | source3/smbd/oplock.c | 64 | ||||
| -rw-r--r-- | source3/smbd/oplock_irix.c | 15 | ||||
| -rw-r--r-- | source3/smbd/oplock_linux.c | 66 | ||||
| -rw-r--r-- | source3/smbd/process.c | 74 |
6 files changed, 33 insertions, 201 deletions
diff --git a/source3/smbd/globals.c b/source3/smbd/globals.c index 28b5a709bd..3f8cb411e5 100644 --- a/source3/smbd/globals.c +++ b/source3/smbd/globals.c @@ -169,11 +169,6 @@ struct vfs_init_function_entry *backends = NULL; char *sparse_buf = NULL; char *LastDir = NULL; -#if HAVE_KERNEL_OPLOCKS_LINUX -SIG_ATOMIC_T oplock_signals_received = 0; -SIG_ATOMIC_T fd_pending_array[FD_PENDING_SIZE]; -#endif - /* Current number of oplocks we have outstanding. */ int32_t exclusive_oplocks_open = 0; int32_t level_II_oplocks_open = 0; @@ -201,8 +196,4 @@ void smbd_init_globals(void) ZERO_STRUCT(conn_ctx_stack); ZERO_STRUCT(sec_ctx_stack); - -#if HAVE_KERNEL_OPLOCKS_LINUX - ZERO_STRUCT(fd_pending_array); -#endif } diff --git a/source3/smbd/globals.h b/source3/smbd/globals.h index 283425caf7..6ac92ed3dd 100644 --- a/source3/smbd/globals.h +++ b/source3/smbd/globals.h @@ -181,12 +181,6 @@ extern struct vfs_init_function_entry *backends; extern char *sparse_buf; extern char *LastDir; -#if HAVE_KERNEL_OPLOCKS_LINUX -extern SIG_ATOMIC_T oplock_signals_received; -#define FD_PENDING_SIZE 100 -extern SIG_ATOMIC_T fd_pending_array[FD_PENDING_SIZE]; -#endif - /* Current number of oplocks we have outstanding. */ extern int32_t exclusive_oplocks_open; extern int32_t level_II_oplocks_open; diff --git a/source3/smbd/oplock.c b/source3/smbd/oplock.c index e4b5016538..788d2f7238 100644 --- a/source3/smbd/oplock.c +++ b/source3/smbd/oplock.c @@ -32,61 +32,23 @@ int32 get_number_of_exclusive_open_oplocks(void) return exclusive_oplocks_open; } -/**************************************************************************** - Return True if an oplock message is pending. -****************************************************************************/ - -bool oplock_message_waiting(void) -{ - if (koplocks && koplocks->ops->msg_waiting(koplocks)) { - return True; - } - - return False; -} - -/**************************************************************************** - Find out if there are any kernel oplock messages waiting and process them - if so. pfds is the fd_set from the main select loop (which contains any - kernel oplock fd if that's what the system uses (IRIX). If may be NULL if - we're calling this in a shutting down state. -****************************************************************************/ - -void process_kernel_oplocks(struct messaging_context *msg_ctx) +/* + * 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) { - /* - * We need to check for kernel oplocks before going into the select - * here, as the EINTR generated by the linux kernel oplock may have - * already been eaten. JRA. - */ - - if (!koplocks) { - return; - } + uint8_t msg[MSG_SMB_KERNEL_BREAK_SIZE]; - while (koplocks->ops->msg_waiting(koplocks)) { - files_struct *fsp; - char msg[MSG_SMB_KERNEL_BREAK_SIZE]; + /* Put the kernel break info into the message. */ + push_file_id_16((char *)msg, &fsp->file_id); + SIVAL(msg,16,fsp->fh->gen_id); - fsp = koplocks->ops->receive_message(koplocks); + /* Don't need to be root here as we're only ever + sending to ourselves. */ - if (fsp == NULL) { - DEBUG(3, ("Kernel oplock message announced, but none " - "received\n")); - return; - } - - /* Put the kernel break info into the message. */ - push_file_id_16(msg, &fsp->file_id); - SIVAL(msg,16,fsp->fh->gen_id); - - /* Don't need to be root here as we're only ever - sending to ourselves. */ - - messaging_send_buf(msg_ctx, procid_self(), - MSG_SMB_KERNEL_BREAK, - (uint8 *)&msg, MSG_SMB_KERNEL_BREAK_SIZE); - } + messaging_send_buf(msg_ctx, procid_self(), + MSG_SMB_KERNEL_BREAK, + msg, MSG_SMB_KERNEL_BREAK_SIZE); } /**************************************************************************** diff --git a/source3/smbd/oplock_irix.c b/source3/smbd/oplock_irix.c index 0cfa960425..d7f45e67de 100644 --- a/source3/smbd/oplock_irix.c +++ b/source3/smbd/oplock_irix.c @@ -252,13 +252,6 @@ static void irix_release_kernel_oplock(struct kernel_oplocks *_ctx, } } -static bool irix_oplock_msg_waiting(struct kernel_oplocks *_ctx) -{ - struct irix_oplocks_context *ctx = talloc_get_type(_ctx->private_data, - struct irix_oplocks_context); - return ctx->pending; -} - static void irix_oplocks_read_fde_handler(struct event_context *ev, struct fd_event *fde, uint16_t flags, @@ -266,10 +259,10 @@ static void irix_oplocks_read_fde_handler(struct event_context *ev, { struct irix_oplocks_context *ctx = talloc_get_type(private_data, struct irix_oplocks_context); + files_struct *fsp; - ctx->pending = true; - process_kernel_oplocks(smbd_messaging_context()); - ctx->pending = false; + fsp = irix_oplock_receive_message(ctx->ctx); + break_kernel_oplock(smbd_messaging_context(), fsp); } /**************************************************************************** @@ -277,10 +270,8 @@ static void irix_oplocks_read_fde_handler(struct event_context *ev, ****************************************************************************/ static const struct kernel_oplocks_ops irix_koplocks = { - .receive_message = irix_oplock_receive_message, .set_oplock = irix_set_kernel_oplock, .release_oplock = irix_release_kernel_oplock, - .msg_waiting = irix_oplock_msg_waiting }; struct kernel_oplocks *irix_init_kernel_oplocks(TALLOC_CTX *mem_ctx) diff --git a/source3/smbd/oplock_linux.c b/source3/smbd/oplock_linux.c index 8087167ff4..51cce0ed48 100644 --- a/source3/smbd/oplock_linux.c +++ b/source3/smbd/oplock_linux.c @@ -43,19 +43,6 @@ #define F_SETSIG 10 #endif -/**************************************************************************** - Handle a LEASE signal, incrementing the signals_received and blocking the signal. -****************************************************************************/ - -static void signal_handler(int sig, siginfo_t *info, void *unused) -{ - if (oplock_signals_received < FD_PENDING_SIZE - 1) { - fd_pending_array[oplock_signals_received] = (SIG_ATOMIC_T)info->si_fd; - oplock_signals_received++; - } /* Else signal is lost. */ - sys_select_signal(RT_SIGNAL_LEASE); -} - /* * public function to get linux lease capability. Needed by some VFS modules (eg. gpfs.c) */ @@ -101,24 +88,17 @@ int linux_setlease(int fd, int leasetype) * oplock break protocol. ****************************************************************************/ -static files_struct *linux_oplock_receive_message(struct kernel_oplocks *ctx) +static void linux_oplock_signal_handler(struct tevent_context *ev_ctx, + struct tevent_signal *se, + int signum, int count, + void *_info, void *private_data) { - int fd; + siginfo_t *info = (siginfo_t *)_info; + int fd = info->si_fd; files_struct *fsp; - BlockSignals(True, RT_SIGNAL_LEASE); - fd = fd_pending_array[0]; fsp = file_find_fd(fd); - fd_pending_array[0] = (SIG_ATOMIC_T)-1; - if (oplock_signals_received > 1) - memmove(CONST_DISCARD(void *, &fd_pending_array[0]), - CONST_DISCARD(void *, &fd_pending_array[1]), - sizeof(SIG_ATOMIC_T)*(oplock_signals_received-1)); - oplock_signals_received--; - /* now we can receive more signals */ - BlockSignals(False, RT_SIGNAL_LEASE); - - return fsp; + break_kernel_oplock(smbd_messaging_context(), fsp); } /**************************************************************************** @@ -180,15 +160,6 @@ static void linux_release_kernel_oplock(struct kernel_oplocks *ctx, } /**************************************************************************** - See if a oplock message is waiting. -****************************************************************************/ - -static bool linux_oplock_msg_waiting(struct kernel_oplocks *ctx) -{ - return oplock_signals_received != 0; -} - -/**************************************************************************** See if the kernel supports oplocks. ****************************************************************************/ @@ -208,16 +179,14 @@ static bool linux_oplocks_available(void) ****************************************************************************/ static const struct kernel_oplocks_ops linux_koplocks = { - .receive_message = linux_oplock_receive_message, .set_oplock = linux_set_kernel_oplock, .release_oplock = linux_release_kernel_oplock, - .msg_waiting = linux_oplock_msg_waiting }; struct kernel_oplocks *linux_init_kernel_oplocks(TALLOC_CTX *mem_ctx) { - struct sigaction act; struct kernel_oplocks *ctx; + struct tevent_signal *se; if (!linux_oplocks_available()) { DEBUG(3,("Linux kernel oplocks not available\n")); @@ -232,19 +201,18 @@ struct kernel_oplocks *linux_init_kernel_oplocks(TALLOC_CTX *mem_ctx) ctx->ops = &linux_koplocks; - ZERO_STRUCT(act); - - act.sa_handler = NULL; - act.sa_sigaction = signal_handler; - act.sa_flags = SA_SIGINFO; - sigemptyset( &act.sa_mask ); - if (sigaction(RT_SIGNAL_LEASE, &act, NULL) != 0) { - DEBUG(0,("Failed to setup RT_SIGNAL_LEASE handler\n")); + se = tevent_add_signal(smbd_event_context(), + ctx, + RT_SIGNAL_LEASE, SA_SIGINFO, + linux_oplock_signal_handler, + ctx); + if (!se) { + DEBUG(0,("Failed to setup RT_SIGNAL_LEASE handler")); + TALLOC_FREE(ctx); return NULL; } - /* the signal can start off blocked due to a bug in bash */ - BlockSignals(False, RT_SIGNAL_LEASE); + ctx->private_data = se; DEBUG(3,("Linux kernel oplocks enabled\n")); diff --git a/source3/smbd/process.c b/source3/smbd/process.c index 9527d94825..d617ef1915 100644 --- a/source3/smbd/process.c +++ b/source3/smbd/process.c @@ -742,46 +742,6 @@ void smbd_setup_sig_hup_handler(void) } } -/**************************************************************************** - Do all async processing in here. This includes kernel oplock messages, change - notify events etc. -****************************************************************************/ - -static void async_processing(void) -{ - DEBUG(10,("async_processing: Doing async processing.\n")); - - process_aio_queue(); - - process_kernel_oplocks(smbd_messaging_context()); - - /* Do the aio check again after receive_local_message as it does a - select and may have eaten our signal. */ - /* Is this till true? -- vl */ - process_aio_queue(); -} - -/**************************************************************************** - Do a select on an two fd's - with timeout. - - If a local udp message has been pushed onto the - queue (this can only happen during oplock break - processing) call async_processing() - - If a pending smb message has been pushed onto the - queue (this can only happen during oplock break - processing) return this next. - - If the first smbfd is ready then read an smb from it. - if the second (loopback UDP) fd is ready then read a message - from it and setup the buffer header to identify the length - and from address. - Returns False on timeout or error. - Else returns True. - -The timeout is in milliseconds -****************************************************************************/ - static NTSTATUS smbd_server_connection_loop_once(struct smbd_server_connection *conn) { fd_set r_fds, w_fds; @@ -800,26 +760,6 @@ static NTSTATUS smbd_server_connection_loop_once(struct smbd_server_connection * FD_ZERO(&w_fds); /* - * Ensure we process oplock break messages by preference. - * We have to do this before the select, after the select - * and if the select returns EINTR. This is due to the fact - * that the selects called from async_processing can eat an EINTR - * caused by a signal (we can't take the break message there). - * This is hideously complex - *MUST* be simplified for 3.0 ! JRA. - */ - - if (oplock_message_waiting()) { - DEBUG(10,("receive_message_or_smb: oplock_message is waiting.\n")); - async_processing(); - /* - * After async processing we must go and do the select again, as - * the state of the flag in fds for the server file descriptor is - * indeterminate - we may have done I/O on it in the oplock processing. JRA. - */ - return NT_STATUS_RETRY; - } - - /* * Are there any timed events waiting ? If so, ensure we don't * select for longer than it would take to wait for them. */ @@ -852,20 +792,6 @@ static NTSTATUS smbd_server_connection_loop_once(struct smbd_server_connection * return NT_STATUS_RETRY; } - /* if we get EINTR then maybe we have received an oplock - signal - treat this as select returning 1. This is ugly, but - is the best we can do until the oplock code knows more about - signals */ - if (selrtn == -1 && errno == EINTR) { - async_processing(); - /* - * After async processing we must go and do the select again, as - * the state of the flag in fds for the server file descriptor is - * indeterminate - we may have done I/O on it in the oplock processing. JRA. - */ - return NT_STATUS_RETRY; - } - /* Check if error */ if (selrtn == -1) { /* something is wrong. Maybe the socket is dead? */ |