diff options
Diffstat (limited to 'erts/emulator/drivers/common')
| -rw-r--r-- | erts/emulator/drivers/common/efile_drv.c | 4249 | ||||
| -rw-r--r-- | erts/emulator/drivers/common/erl_efile.h | 176 | ||||
| -rw-r--r-- | erts/emulator/drivers/common/gzio.c | 712 | ||||
| -rw-r--r-- | erts/emulator/drivers/common/gzio.h | 8 | ||||
| -rw-r--r-- | erts/emulator/drivers/common/inet_drv.c | 465 |
5 files changed, 378 insertions, 5232 deletions
diff --git a/erts/emulator/drivers/common/efile_drv.c b/erts/emulator/drivers/common/efile_drv.c deleted file mode 100644 index 3a7b3bb50c..0000000000 --- a/erts/emulator/drivers/common/efile_drv.c +++ /dev/null @@ -1,4249 +0,0 @@ -/* - * %CopyrightBegin% - * - * Copyright Ericsson AB 1996-2017. All Rights Reserved. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - * %CopyrightEnd% - */ -/* - * Purpose: Provides file and directory operations. - * - * This file is generic, and does the work of decoding the commands - * and encoding the responses. System-specific functions are found in - * the unix_efile.c and win_efile.c files. - */ - -/* Operations */ - -#define FILE_OPEN 1 /* Essential for startup */ -#define FILE_READ 2 -#define FILE_LSEEK 3 -#define FILE_WRITE 4 -#define FILE_FSTAT 5 /* Essential for startup */ -#define FILE_PWD 6 /* Essential for startup */ -#define FILE_READDIR 7 /* Essential for startup */ -#define FILE_CHDIR 8 -#define FILE_FSYNC 9 -#define FILE_MKDIR 10 -#define FILE_DELETE 11 -#define FILE_RENAME 12 -#define FILE_RMDIR 13 -#define FILE_TRUNCATE 14 -#define FILE_READ_FILE 15 /* Essential for startup */ -#define FILE_WRITE_INFO 16 -#define FILE_LSTAT 19 -#define FILE_READLINK 20 -#define FILE_LINK 21 -#define FILE_SYMLINK 22 -#define FILE_CLOSE 23 -#define FILE_PWRITEV 24 -#define FILE_PREADV 25 -#define FILE_SETOPT 26 -#define FILE_IPREAD 27 -#define FILE_ALTNAME 28 -#define FILE_READ_LINE 29 -#define FILE_FDATASYNC 30 -#define FILE_FADVISE 31 -#define FILE_SENDFILE 32 -#define FILE_FALLOCATE 33 -#define FILE_CLOSE_ON_PORT_EXIT 34 -/* Return codes */ - -#define FILE_RESP_OK 0 -#define FILE_RESP_ERROR 1 -#define FILE_RESP_DATA 2 -#define FILE_RESP_NUMBER 3 -#define FILE_RESP_INFO 4 -#define FILE_RESP_NUMERR 5 -#define FILE_RESP_LDATA 6 -#define FILE_RESP_N2DATA 7 -#define FILE_RESP_EOF 8 -#define FILE_RESP_FNAME 9 -#define FILE_RESP_ALL_DATA 10 -#define FILE_RESP_LFNAME 11 - -/* Options */ - -#define FILE_OPT_DELAYED_WRITE 0 -#define FILE_OPT_READ_AHEAD 1 - -/* IPREAD variants */ - -#define IPREAD_S32BU_P32BU 0 - -/* Limits */ - -#define FILE_SEGMENT_READ (256*1024) -#define FILE_SEGMENT_WRITE (256*1024) - -/* Internal */ - -/* Set to 1 to test having read_ahead implicitly for read_line */ -#define ALWAYS_READ_LINE_AHEAD 0 - - -/* Must not be possible to get from malloc()! */ -#define FILE_FD_INVALID ((Sint)(-1)) - -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif - -#include <ctype.h> -#include <sys/types.h> -#include <stdlib.h> - -/* Need (NON)BLOCKING macros for sendfile */ -#ifndef WANT_NONBLOCKING -#define WANT_NONBLOCKING -#endif - -#include "sys.h" - -#include "erl_driver.h" -#include "erl_efile.h" -#include "erl_threads.h" -#include "gzio.h" -#include "dtrace-wrapper.h" - - -static ErlDrvSysInfo sys_info; - -/* For explanation of this var, see comment for same var in erl_async.c */ -static unsigned gcc_optimizer_hack = 0; - -#ifdef USE_VM_PROBES - -#define DTRACE_EFILE_BUFSIZ 128 - -#define DTRACE_INVOKE_SETUP(op) \ - do { DTRACE3(efile_drv_int_entry, d->sched_i1, d->sched_i2, op); } while (0) -#define DTRACE_INVOKE_SETUP_BY_NAME(op) \ - struct t_data *d = (struct t_data *) data ; \ - DTRACE_INVOKE_SETUP(op) -#define DTRACE_INVOKE_RETURN(op) \ - do { DTRACE3(efile_drv_int_return, d->sched_i1, d->sched_i2, \ - op); } while (0) ; gcc_optimizer_hack++ ; - -/* Assign human-friendlier id numbers to scheduler & I/O worker threads */ -int dt_driver_idnum = 0; -int dt_driver_io_worker_base = 5000; -erts_mtx_t dt_driver_mutex; -pthread_key_t dt_driver_key; - -typedef struct { - int thread_num; - Uint64 tag; -} dt_private; - -dt_private *get_dt_private(int); -#else /* USE_VM_PROBES */ -#define DTRACE_INVOKE_SETUP(op) do {} while (0) -#define DTRACE_INVOKE_SETUP_BY_NAME(op) do {} while (0) -#define DTRACE_INVOKE_RETURN(op) do {} while (0) -#endif /* USE_VM_PROBES */ - -/* #define TRACE 1 */ -#ifdef TRACE -# define TRACE_C(c) do { putchar(c); fflush(stdout); } while (0) -# define TRACE_S(s) do { fputs((s), stdout); fflush(stdout); } while (0) -# define TRACE_F(args) do { printf args ;fflush(stdout); } while (0) -#else -# define TRACE_C(c) ((void)(0)) -# define TRACE_S(s) ((void)(0)) -# define TRACE_F(args) ((void)(0)) -#endif - - -#ifdef USE_THREADS -#define THRDS_AVAILABLE (sys_info.async_threads > 0) -#ifdef HARDDEBUG /* HARDDEBUG in io.c is expected too */ -#define TRACE_DRIVER fprintf(stderr, "Efile: ") -#else -#define TRACE_DRIVER -#endif -#define MUTEX_INIT(m, p) do { IF_THRDS { TRACE_DRIVER; (m = driver_pdl_create(p)); } } while (0) -#define MUTEX_LOCK(m) do { IF_THRDS { TRACE_DRIVER; driver_pdl_lock(m); } } while (0) -#define MUTEX_UNLOCK(m) do { IF_THRDS { TRACE_DRIVER; driver_pdl_unlock(m); } } while (0) -#else -#define THRDS_AVAILABLE (0) -#define MUTEX_INIT(m, p) -#define MUTEX_LOCK(m) -#define MUTEX_UNLOCK(m) -#endif -#define IF_THRDS if (THRDS_AVAILABLE) - - -#define SENDFILE_FLGS_USE_THREADS (1 << 0) -/** - * On DARWIN sendfile can deadlock with close if called in - * different threads. So until Apple fixes so that sendfile - * is not buggy we disable usage of the async pool for - * DARWIN. The testcase t_sendfile_crashduring reproduces - * this error when using +A 10 and enabling SENDFILE_FLGS_USE_THREADS. - */ -#if defined(__APPLE__) && defined(__MACH__) -#define USE_THRDS_FOR_SENDFILE(DATA) 0 -#else -#define USE_THRDS_FOR_SENDFILE(DATA) (DATA->flags & SENDFILE_FLGS_USE_THREADS) -#endif /* defined(__APPLE__) && defined(__MACH__) */ - - - -#if 0 -/* Experimental, for forcing all file operations to use the same thread. */ - static unsigned file_fixed_key = 1; -# define KEY(desc) (&file_fixed_key) -#else -# define KEY(desc) (&(desc)->key) -#endif - -#ifndef MAX -# define MAX(x, y) (((x) > (y)) ? (x) : (y)) -#endif - -#ifdef FILENAMES_16BIT -#ifdef USE_VM_PROBES -#error 16bit characters in filenames and dtrace in combination is not supported. -#endif -# define FILENAME_BYTELEN(Str) filename_len_16bit(Str) -# define FILENAME_COPY(To,From) filename_cpy_16bit((To),(From)) -# define FILENAME_CHARSIZE 2 - - static int filename_len_16bit(char *str) - { - char *p = str; - while(*p != '\0' || p[1] != '\0') { - p += 2; - } - return (p - str); - } - - static void filename_cpy_16bit(char *to, char *from) - { - while(*from != '\0' || from[1] != '\0') { - *to++ = *from++; - *to++ = *from++; - } - *to++ = *from++; - *to++ = *from++; - } - -#else -# define FILENAME_BYTELEN(Str) strlen(Str) -# define FILENAME_COPY(To,From) strcpy(To,From) -# define FILENAME_CHARSIZE 1 -#endif - -#if (MAXPATHLEN+1)*FILENAME_CHARSIZE+1 > BUFSIZ -# define RESBUFSIZE ((MAXPATHLEN+1)*FILENAME_CHARSIZE+1) -#else -# define RESBUFSIZE BUFSIZ -#endif - -#define READDIR_CHUNKS (5) - - - -#if ALWAYS_READ_LINE_AHEAD -#define DEFAULT_LINEBUF_SIZE 2048 -#else -#define DEFAULT_LINEBUF_SIZE 512 /* Small, it's usually discarded anyway */ -#endif - -typedef unsigned char uchar; - -static ErlDrvData file_start(ErlDrvPort port, char* command); -static int file_init(void); -static void file_stop(ErlDrvData); -static void file_output(ErlDrvData, char* buf, ErlDrvSizeT len); -static ErlDrvSSizeT file_control(ErlDrvData, unsigned int command, - char* buf, ErlDrvSizeT len, - char **rbuf, ErlDrvSizeT rlen); -static void file_timeout(ErlDrvData); -static void file_outputv(ErlDrvData, ErlIOVec*); -static void file_async_ready(ErlDrvData, ErlDrvThreadData); -static void file_flush(ErlDrvData); - -#ifdef HAVE_SENDFILE -static void file_ready_output(ErlDrvData data, ErlDrvEvent event); -static void file_stop_select(ErlDrvEvent event, void* _); -#endif /* HAVE_SENDFILE */ - - -enum e_timer {timer_idle, timer_again, timer_write}; -#ifdef HAVE_SENDFILE -enum e_sendfile {sending, not_sending}; -#define SENDFILE_USE_THREADS (1 << 0) -#endif /* HAVE_SENDFILE */ - -struct t_data; - -typedef struct { - SWord fd; - ErlDrvPort port; - unsigned int key; /* Async queue key */ - unsigned flags; /* Original flags from FILE_OPEN. */ - void (*invoke)(void *); - struct t_data *d; - void (*free)(void *); - struct t_data *cq_head; /* Queue of incoming commands */ - struct t_data *cq_tail; /* -""- */ - enum e_timer timer_state; -#ifdef HAVE_SENDFILE - enum e_sendfile sendfile_state; -#endif /* HAVE_SENDFILE */ - size_t read_bufsize; - ErlDrvBinary *read_binp; - size_t read_offset; - size_t read_size; - size_t write_bufsize; - unsigned long write_delay; - int write_error; - Efile_error write_errInfo; - ErlDrvPDL q_mtx; /* Mutex for the driver queue, known by the emulator. Also used for - mutual exclusion when accessing field(s) below. */ - size_t write_buffered; -#ifdef USE_VM_PROBES - int idnum; /* Unique ID # for this driver thread/desc */ - char port_str[DTRACE_TERM_BUF_SIZE]; -#endif -} file_descriptor; - - -static int reply_error(file_descriptor*, Efile_error* errInfo); - -struct erl_drv_entry efile_driver_entry = { - file_init, - file_start, - file_stop, - file_output, - NULL, -#ifdef HAVE_SENDFILE - file_ready_output, -#else - NULL, -#endif /* HAVE_SENDFILE */ - "efile", - NULL, - NULL, - file_control, - file_timeout, - file_outputv, - file_async_ready, - file_flush, - NULL, - NULL, - ERL_DRV_EXTENDED_MARKER, - ERL_DRV_EXTENDED_MAJOR_VERSION, - ERL_DRV_EXTENDED_MINOR_VERSION, - ERL_DRV_FLAG_USE_PORT_LOCKING, - NULL, - NULL, -#ifdef HAVE_SENDFILE - file_stop_select -#else - NULL -#endif /* HAVE_SENDFILE */ -}; - - - -static int thread_short_circuit; - -#define DRIVER_ASYNC(level, desc, f_invoke, data, f_free) \ -if (thread_short_circuit >= (level)) { \ - (*(f_invoke))(data); \ - file_async_ready((ErlDrvData)(desc), (data)); \ -} else { \ - driver_async((desc)->port, KEY(desc), (f_invoke), (data), (f_free)); \ -} - - - -struct t_pbuf_spec { - Sint64 offset; - size_t size; -}; - -struct t_pwritev { - ErlDrvPort port; - ErlDrvPDL q_mtx; - size_t size; - unsigned cnt; - unsigned n; - struct t_pbuf_spec specs[1]; -}; - -struct t_preadv { - ErlIOVec eiov; - unsigned n; - unsigned cnt; - size_t size; - Sint64 offsets[1]; -}; - -#define READDIR_BUFSIZE (8*1024)*READDIR_CHUNKS -#if READDIR_BUFSIZE < (1 + (2 + MAXPATHLEN)*FILENAME_CHARSIZE*READDIR_CHUNKS) -# undef READDIR_BUFSIZE -# define READDIR_BUFSIZE (1 + (2 + MAXPATHLEN)*FILENAME_CHARSIZE*READDIR_CHUNKS) -#endif - -struct t_readdir_buf { - struct t_readdir_buf *next; - size_t n; - char buf[READDIR_BUFSIZE]; -}; - -struct t_data -{ - struct t_data *next; - int command; - int level; - void (*invoke)(void *); - void (*free)(void *); - void *data_to_free; /* used by FILE_CLOSE_ON_PORT_EXIT only */ - int again; - int reply; -#ifdef USE_VM_PROBES - int sched_i1; - Uint64 sched_i2; - char sched_utag[DTRACE_EFILE_BUFSIZ+1]; -#endif - int result_ok; - Efile_error errInfo; - int flags; - SWord fd; - int is_fd_unused; - /**/ - Efile_info info; - EFILE_DIR_HANDLE dir_handle; /* Handle to open directory. */ - ErlDrvBinary *bin; - int drive; - size_t n; - /*off_t offset;*/ - /*size_t bytesRead; Bytes read from the file. */ - /**/ - union { - struct { - Sint64 offset; - int origin; - Sint64 location; - } lseek; - struct { - ErlDrvPort port; - ErlDrvPDL q_mtx; - size_t size; - size_t reply_size; - } writev; - struct t_pwritev pwritev; - struct t_preadv preadv; - struct { - ErlDrvBinary *binp; - size_t bin_offset; - size_t bin_size; - size_t size; - } read; - struct { - ErlDrvBinary *binp; /* in - out */ - size_t read_offset; /* in - out */ - size_t read_size; /* in - out */ - size_t nl_pos; /* out */ - short nl_skip; /* out, 0 or 1 */ -#if !ALWAYS_READ_LINE_AHEAD - short read_ahead; /* in, bool */ -#endif - } read_line; - struct { - ErlDrvBinary *binp; - int size; - int offset; - } read_file; - struct { - struct t_readdir_buf *first_buf; - struct t_readdir_buf *last_buf; - } read_dir; - struct { - Sint64 offset; - Sint64 length; - int advise; - } fadvise; -#ifdef HAVE_SENDFILE - struct { - ErlDrvPort port; - ErlDrvPDL q_mtx; - int out_fd; - off_t offset; - Uint64 nbytes; - Uint64 written; - } sendfile; -#endif /* HAVE_SENDFILE */ - struct { - Sint64 offset; - Sint64 length; - } fallocate; - } c; - char b[1]; -}; - -#define EF_ALLOC(S) driver_alloc((S)) -#define EF_REALLOC(P, S) driver_realloc((P), (S)) -#define EF_SAFE_ALLOC(S) ef_safe_alloc((S)) -#define EF_SAFE_REALLOC(P, S) ef_safe_realloc((P), (S)) -#define EF_FREE(P) do { if((P)) driver_free((P)); } while(0) - -static void *ef_safe_alloc(Uint s) -{ - void *p = EF_ALLOC(s); - if (!p) erts_exit(ERTS_ERROR_EXIT, "efile drv: Can't allocate %lu bytes of memory\n", (unsigned long)s); - return p; -} - -/********************************************************************* - * ErlIOVec manipulation functions. - */ - -/* char EV_CHAR_P(ErlIOVec *ev, int p, int q) */ -#define EV_CHAR_P(ev, p, q) \ - (((char *)(ev)->iov[q].iov_base) + (p)) - -/* int EV_GET_CHAR(ErlIOVec *ev, char *p, int *pp, int *qp) */ -#define EV_GET_CHAR(ev, p, pp, qp) efile_ev_get_char(ev, p ,pp, qp) -static int -efile_ev_get_char(ErlIOVec *ev, char *p, size_t *pp, size_t *qp) { - if (*pp + 1 <= ev->iov[*qp].iov_len) { - *p = *EV_CHAR_P(ev, *pp, *qp); - if (*pp + 1 < ev->iov[*qp].iov_len) - *pp += 1; - else { - *qp += 1; - *pp = 0; - } - return !0; - } - return 0; -} - -/* Uint32 EV_UINT32(ErlIOVec *ev, int p, int q)*/ -#define EV_UINT32(ev, p, q) \ - ((Uint32) ((unsigned char *)(ev)->iov[q].iov_base)[p]) - -/* int EV_GET_UINT32(ErlIOVec *ev, Uint32 *p, int *pp, int *qp) */ -#define EV_GET_UINT32(ev, p, pp, qp) efile_ev_get_uint32(ev, p, pp, qp) -static int -efile_ev_get_uint32(ErlIOVec *ev, Uint32 *p, size_t *pp, size_t *qp) { - if (*pp + 4 <= ev->iov[*qp].iov_len) { - *p = (EV_UINT32(ev, *pp, *qp) << 24) - | (EV_UINT32(ev, *pp + 1, *qp) << 16) - | (EV_UINT32(ev, *pp + 2, *qp) << 8) - | (EV_UINT32(ev, *pp + 3, *qp)); - if (*pp + 4 < ev->iov[*qp].iov_len) - *pp += 4; - else { - *qp += 1; - *pp = 0; - } - return !0; - } - return 0; -} - -/* Uint64 EV_UINT64(ErlIOVec *ev, int p, int q)*/ -#define EV_UINT64(ev, p, q) \ - ((Uint64) ((unsigned char *)(ev)->iov[q].iov_base)[p]) - -/* int EV_GET_UINT64(ErlIOVec *ev, Uint64 *p, int *pp, int *qp) */ -#define EV_GET_UINT64(ev, p, pp, qp) efile_ev_get_uint64(ev, p, pp, qp) -static int -efile_ev_get_uint64(ErlIOVec *ev, Uint64 *p, size_t *pp, size_t *qp) { - if (*pp + 8 <= ev->iov[*qp].iov_len) { - *p = (EV_UINT64(ev, *pp, *qp) << 56) - | (EV_UINT64(ev, *pp + 1, *qp) << 48) - | (EV_UINT64(ev, *pp + 2, *qp) << 40) - | (EV_UINT64(ev, *pp + 3, *qp) << 32) - | (EV_UINT64(ev, *pp + 4, *qp) << 24) - | (EV_UINT64(ev, *pp + 5, *qp) << 16) - | (EV_UINT64(ev, *pp + 6, *qp) << 8) - | (EV_UINT64(ev, *pp + 7, *qp)); - if (*pp + 8 < ev->iov[*qp].iov_len) - *pp += 8; - else { - *qp += 1; - *pp = 0; - } - return !0; - } - return 0; -} - -/* int EV_GET_SINT64(ErlIOVec *ev, Uint64 *p, int *pp, int *qp) */ -#define EV_GET_SINT64(ev, p, pp, qp) efile_ev_get_sint64(ev, p, pp, qp) -static int -efile_ev_get_sint64(ErlIOVec *ev, Sint64 *p, size_t *pp, size_t *qp) { - Uint64 *tmp = (Uint64*)p; - return EV_GET_UINT64(ev, tmp, pp, qp); -} - -#if 0 - -static void ev_clear(ErlIOVec *ev) { - ASSERT(ev); - ev->size = 0; - ev->vsize = 0; - ev->iov = NULL; - ev->binv = NULL; -} - -/* Assumes that ->iov and ->binv were allocated with sys_alloc(). - */ -static void ev_free(ErlIOVec *ev) { - if (! ev) { - return; - } - if (ev->vsize > 0) { - int i; - ASSERT(ev->iov); - ASSERT(ev->binv); - for (i = 0; i < ev->vsize; i++) { - if (ev->binv[i]) { - driver_free_binary(ev->binv[i]); - } - } - EF_FREE(ev->iov); - EF_FREE(ev->binv); - } -} - -/* Copy the contents from source to dest. - * Data in binaries is not copied, just the pointers; - * and refc is incremented. - */ -static ErlIOVec *ev_copy(ErlIOVec *dest, ErlIOVec *source) { - int *ip; - ASSERT(dest); - ASSERT(source); - if (source->vsize == 0) { - /* Empty source */ - ev_clear(dest); - return dest; - } - /* Allocate ->iov and ->binv */ - dest->iov = EF_ALLOC(sizeof(*dest->iov) * source->vsize); - if (! dest->iov) { - return NULL; - } - dest->binv = EF_ALLOC(sizeof(*dest->binv) * source->vsize); - if (! dest->binv) { - EF_FREE(dest->iov); - return NULL; - } - dest->size = source->size; - /* Copy one vector element at the time. - * Use *ip as an alias for dest->vsize to improve readabiliy. - * Keep dest consistent in every iteration by using - * dest->vsize==*ip as loop variable. - */ - for (ip = &dest->vsize, *ip = 0; *ip < source->vsize; (*ip)++) { - if (source->iov[*ip].iov_len == 0) { - /* Empty vector element */ - dest->iov[*ip].iov_len = 0; - dest->iov[*ip].iov_base = NULL; - dest->binv[*ip] = NULL; - } else { - /* Non empty vector element */ - if (source->binv[*ip]) { - /* Contents in binary - copy pointers and increment refc */ - dest->iov[*ip] = source->iov[*ip]; - dest->binv[*ip] = source->binv[*ip]; - driver_binary_inc_refc(source->binv[*ip]); - } else { - /* Contents not in binary - allocate new binary and copy data */ - if (! (dest->binv[*ip] = - driver_alloc_binary(source->iov[*ip].iov_len))) { - goto failed; - } - sys_memcpy(dest->binv[*ip]->orig_bytes, - source->iov[*ip].iov_base, - source->iov[*ip].iov_len); - dest->iov[*ip].iov_base = dest->binv[*ip]->orig_bytes; - dest->iov[*ip].iov_len = source->iov[*ip].iov_len; - } - } - } - return dest; - failed: - ev_free(dest); - return NULL; -} - -#endif - - - -/********************************************************************* - * Command queue functions - */ - -static void cq_enq(file_descriptor *desc, struct t_data *d) { - ASSERT(d); - if (desc->cq_head) { - ASSERT(desc->cq_tail); - ASSERT(!desc->cq_tail->next); - desc->cq_tail = desc->cq_tail->next = d; - } else { - ASSERT(desc->cq_tail == NULL); - desc->cq_head = desc->cq_tail = d; - } - d->next = NULL; -} - -static struct t_data *cq_deq(file_descriptor *desc) { - struct t_data *d = desc->cq_head; - ASSERT(d || (!d && !desc->cq_tail)); - if (d) { - ASSERT(!d->next || (d->next && desc->cq_tail != d)); - if ((desc->cq_head = d->next) == NULL) { - ASSERT(desc->cq_tail == d); - desc->cq_tail = NULL; - } - } - return d; -} - - -/********************************************************************* - * Driver entry point -> init - */ -static int -file_init(void) -{ - char buf[21]; /* enough to hold any 64-bit integer */ - size_t bufsz = sizeof(buf); - thread_short_circuit = (erl_drv_getenv("ERL_EFILE_THREAD_SHORT_CIRCUIT", - buf, - &bufsz) == 0 - ? atoi(buf) - : 0); - driver_system_info(&sys_info, sizeof(ErlDrvSysInfo)); - - /* run initiation of efile_driver if needed */ - efile_init(); - -#ifdef USE_VM_PROBES - erts_mtx_init(&dt_driver_mutex, "efile_drv dtrace mutex", NIL, - ERTS_LOCK_FLAGS_PROPERTY_STATIC | ERTS_LOCK_FLAGS_CATEGORY_IO); - pthread_key_create(&dt_driver_key, NULL); -#endif /* USE_VM_PROBES */ - - return 0; -} - - -/********************************************************************* - * Driver entry point -> start - */ -static ErlDrvData -file_start(ErlDrvPort port, char* command) - -{ - file_descriptor* desc; - - if ((desc = (file_descriptor*) EF_ALLOC(sizeof(file_descriptor))) - == NULL) { - errno = ENOMEM; - return ERL_DRV_ERROR_ERRNO; - } - desc->fd = FILE_FD_INVALID; - desc->port = port; - desc->key = driver_async_port_key(port); - desc->flags = 0; - desc->invoke = NULL; - desc->d = NULL; - desc->free = NULL; - desc->cq_head = NULL; - desc->cq_tail = NULL; - desc->timer_state = timer_idle; -#ifdef HAVE_SENDFILE - desc->sendfile_state = not_sending; -#endif - desc->read_bufsize = 0; - desc->read_binp = NULL; - desc->read_offset = 0; - desc->read_size = 0; - desc->write_delay = 0L; - desc->write_bufsize = 0; - desc->write_error = 0; - MUTEX_INIT(desc->q_mtx, port); /* Refc is one, referenced by emulator now */ - desc->write_buffered = 0; -#ifdef USE_VM_PROBES - dtrace_drvport_str(port, desc->port_str); - get_dt_private(0); /* throw away return value */ -#endif /* USE_VM_PROBES */ - return (ErlDrvData) desc; -} - -static void do_close(int flags, SWord fd) { - if (flags & EFILE_COMPRESSED) { - erts_gzclose((ErtsGzFile)(fd)); - } else { - efile_closefile((int) fd); - } -} - -static void invoke_close(void *data) -{ - struct t_data *d = (struct t_data *) data; - DTRACE_INVOKE_SETUP(FILE_CLOSE); - d->again = 0; - do_close(d->flags, d->fd); - DTRACE_INVOKE_RETURN(FILE_CLOSE); -} - -static void free_data(void *data) -{ - struct t_data *d = (struct t_data *) data; - - switch (d->command) { - case FILE_OPEN: - if (d->is_fd_unused && d->fd != FILE_FD_INVALID) { - /* This is OK to do in scheduler thread because there can be no async op - ongoing for this fd here, as we exited during async open. - Ideally, this close should happen in an async thread too, but that would - require a substantial rewrite, as we are here because of a dead port and - cannot schedule async jobs for that port any more... */ - do_close(d->flags, d->fd); - } - break; - case FILE_CLOSE_ON_PORT_EXIT: - EF_FREE(d->data_to_free); - break; - } - - EF_FREE(data); -} - - -/* - * Sends back an error reply to Erlang. - */ - -static void reply_posix_error(file_descriptor *desc, int posix_errno) { - char response[256]; /* Response buffer. */ - char* s; - char* t; - - /* - * Contents of buffer sent back: - * - * +-----------------------------------------+ - * | FILE_RESP_ERROR | Posix error id string | - * +-----------------------------------------+ - */ - - TRACE_C('E'); - - response[0] = FILE_RESP_ERROR; - for (s = erl_errno_id(posix_errno), t = response+1; *s; s++, t++) - *t = tolower(*s); - driver_output2(desc->port, response, t-response, NULL, 0); -} - -static void reply_Uint_posix_error(file_descriptor *desc, Uint num, - int posix_errno) { - char response[256]; /* Response buffer. */ - char* s; - char* t; - - /* - * Contents of buffer sent back: - * - * +----------------------------------------------------------------------+ - * | FILE_RESP_NUMERR | 64-bit number (big-endian) | Posix error id string | - * +----------------------------------------------------------------------+ - */ - - TRACE_C('N'); - - response[0] = FILE_RESP_NUMERR; -#if SIZEOF_VOID_P == 4 - put_int32(0, response+1); -#else - put_int32(num>>32, response+1); -#endif - put_int32((Uint32)num, response+1+4); - for (s = erl_errno_id(posix_errno), t = response+1+4+4; *s; s++, t++) - *t = tolower(*s); - driver_output2(desc->port, response, t-response, NULL, 0); -} - -#ifdef HAVE_SENDFILE -static void reply_string_error(file_descriptor *desc, char* str) { - char response[256]; /* Response buffer. */ - char* s; - char* t; - - response[0] = FILE_RESP_ERROR; - for (s = str, t = response+1; *s; s++, t++) - *t = tolower(*s); - driver_output2(desc->port, response, t-response, NULL, 0); -} -#endif - -static int reply_error(file_descriptor *desc, - Efile_error *errInfo) /* The error codes. */ -{ - reply_posix_error(desc, errInfo->posix_errno); - return 0; -} - -static int reply_Uint_error(file_descriptor *desc, Uint num, - Efile_error *errInfo) /* The error codes. */ -{ - reply_Uint_posix_error(desc, num, errInfo->posix_errno); - return 0; -} - -static int reply_ok(file_descriptor *desc) { - char c = FILE_RESP_OK; - - driver_output2(desc->port, &c, 1, NULL, 0); - return 0; -} - -static int reply(file_descriptor *desc, int ok, Efile_error *errInfo) { - if (!ok) { - reply_error(desc, errInfo); - } else { - TRACE_C('K'); - reply_ok(desc); - } - return 0; -} - -static int reply_Uint(file_descriptor *desc, Uint result) { - char tmp[1+4+4]; - - /* - * Contents of buffer sent back: - * - * +-----------------------------------------------+ - * | FILE_RESP_NUMBER | 64-bit number (big-endian) | - * +-----------------------------------------------+ - */ - - TRACE_C('R'); - - tmp[0] = FILE_RESP_NUMBER; -#if SIZEOF_VOID_P == 4 - put_int32(0, tmp+1); -#else - put_int32(result>>32, tmp+1); -#endif - put_int32((Uint32)result, tmp+1+4); - driver_output2(desc->port, tmp, sizeof(tmp), NULL, 0); - return 0; -} - -static int reply_Sint64(file_descriptor *desc, Sint64 result) { - char tmp[1+4+4]; - - /* - * Contents of buffer sent back: - * - * +-----------------------------------------------+ - * | FILE_RESP_NUMBER | 64-bit number (big-endian) | - * +-----------------------------------------------+ - */ - - TRACE_C('R'); - - tmp[0] = FILE_RESP_NUMBER; - put_int64(result, tmp+1); - driver_output2(desc->port, tmp, sizeof(tmp), NULL, 0); - return 0; -} - -#if 0 -static void reply_again(file_descriptor *desc) { - char tmp[1]; - tmp[0] = FILE_RESP_AGAIN; - driver_output2(desc->port, tmp, sizeof(tmp), NULL, 0); -} -#endif - -static void reply_ev(file_descriptor *desc, char response, ErlIOVec *ev) { - char tmp[1]; - /* Data arriving at the Erlang process: - * [Response, Binary0, Binary1, .... | BinaryN-1] - */ - tmp[0] = response; - driver_outputv(desc->port, tmp, sizeof(tmp), ev, 0); -} - -static void reply_data(file_descriptor *desc, - ErlDrvBinary *binp, size_t offset, size_t len) { - char header[1+4+4]; - /* Data arriving at the Erlang process: - * [?FILE_RESP_DATA, 64-bit length (big-endian) | Data] - */ - header[0] = FILE_RESP_DATA; -#if SIZEOF_SIZE_T == 4 - put_int32(0, header+1); -#else - put_int32(len>>32, header+1); -#endif - put_int32((Uint32)len, header+1+4); - driver_output_binary(desc->port, header, sizeof(header), - binp, offset, len); -} - -static void reply_buf(file_descriptor *desc, char *buf, size_t len) { - char header[1+4+4]; - /* Data arriving at the Erlang process: - * [?FILE_RESP_DATA, 64-bit length (big-endian) | Data] - */ - header[0] = FILE_RESP_DATA; -#if SIZEOF_SIZE_T == 4 - put_int32(0, header+1); -#else - put_int32(len>>32, header+1); -#endif - put_int32((Uint32)len, header+1+4); - driver_output2(desc->port, header, sizeof(header), buf, len); -} - -static int reply_eof(file_descriptor *desc) { - char c = FILE_RESP_EOF; - - driver_output2(desc->port, &c, 1, NULL, 0); - return 0; -} - -static void invoke_name(void *data, int (*f)(Efile_error *, char *)) -{ - struct t_data *d = (struct t_data *) data; - char *name = (char *) d->b; - - d->again = 0; - d->result_ok = (*f)(&d->errInfo, name); -} - -static void invoke_mkdir(void *data) -{ - DTRACE_INVOKE_SETUP_BY_NAME(FILE_MKDIR); - invoke_name(data, efile_mkdir); - DTRACE_INVOKE_RETURN(FILE_MKDIR); -} - -static void invoke_rmdir(void *data) -{ - DTRACE_INVOKE_SETUP_BY_NAME(FILE_RMDIR); - invoke_name(data, efile_rmdir); - DTRACE_INVOKE_RETURN(FILE_RMDIR); -} - -static void invoke_delete_file(void *data) -{ - DTRACE_INVOKE_SETUP_BY_NAME(FILE_DELETE); - invoke_name(data, efile_delete_file); - DTRACE_INVOKE_RETURN(FILE_DELETE); -} - -static void invoke_chdir(void *data) -{ - DTRACE_INVOKE_SETUP_BY_NAME(FILE_CHDIR); - invoke_name(data, efile_chdir); - DTRACE_INVOKE_RETURN(FILE_CHDIR); -} - -static void invoke_fdatasync(void *data) -{ - struct t_data *d = (struct t_data *) data; - int fd = (int) d->fd; - DTRACE_INVOKE_SETUP(FILE_FDATASYNC); - - d->again = 0; - d->result_ok = efile_fdatasync(&d->errInfo, fd); - DTRACE_INVOKE_RETURN(FILE_FDATASYNC); -} - -static void invoke_fsync(void *data) -{ - struct t_data *d = (struct t_data *) data; - int fd = (int) d->fd; - DTRACE_INVOKE_SETUP(FILE_FSYNC); - - d->again = 0; - d->result_ok = efile_fsync(&d->errInfo, fd); - DTRACE_INVOKE_RETURN(FILE_FSYNC); -} - -static void invoke_truncate(void *data) -{ - struct t_data *d = (struct t_data *) data; - int fd = (int) d->fd; - DTRACE_INVOKE_SETUP(FILE_TRUNCATE); - - d->again = 0; - d->result_ok = efile_truncate_file(&d->errInfo, &fd, d->flags); - DTRACE_INVOKE_RETURN(FILE_TRUNCATE); -} - -static void invoke_read(void *data) -{ - struct t_data *d = (struct t_data *) data; - int status, segment; - size_t size, read_size; - DTRACE_INVOKE_SETUP(FILE_READ); - - segment = d->again && d->c.read.bin_size >= 2*FILE_SEGMENT_READ; - if (segment) { - size = FILE_SEGMENT_READ; - } else { - size = d->c.read.bin_size; - } - read_size = size; - if (d->flags & EFILE_COMPRESSED) { - read_size = erts_gzread((ErtsGzFile)d->fd, - d->c.read.binp->orig_bytes + d->c.read.bin_offset, - size); - status = (read_size != (size_t) -1); - if (!status) { - d->errInfo.posix_errno = EIO; - } - } else { - status = efile_read(&d->errInfo, d->flags, (int) d->fd, - d->c.read.binp->orig_bytes + d->c.read.bin_offset, - size, - &read_size); - } - if ( (d->result_ok = status)) { - ASSERT(read_size <= size); - d->c.read.bin_offset += read_size; - if (read_size < size || !segment) { - d->c.read.bin_size = 0; - d->again = 0; - } else { - d->c.read.bin_size -= read_size; - } - } else { - d->again = 0; - } - DTRACE_INVOKE_RETURN(FILE_READ); -} - -static void free_read(void *data) -{ - struct t_data *d = (struct t_data *) data; - - driver_free_binary(d->c.read.binp); - EF_FREE(d); -} - -static void invoke_read_line(void *data) -{ - struct t_data *d = (struct t_data *) data; - int status; - size_t read_size = 0; - int local_loop = (d->again == 0); - DTRACE_INVOKE_SETUP(FILE_READ_LINE); - - do { - size_t size = (d->c.read_line.binp)->orig_size - - d->c.read_line.read_offset - d->c.read_line.read_size; - if (size == 0) { - /* Need more place */ - ErlDrvSizeT need = (d->c.read_line.read_size >= DEFAULT_LINEBUF_SIZE) ? - d->c.read_line.read_size + DEFAULT_LINEBUF_SIZE : DEFAULT_LINEBUF_SIZE; - ErlDrvBinary *newbin; -#if !ALWAYS_READ_LINE_AHEAD - /* Use read_ahead size if need does not exceed it */ - if (need < (d->c.read_line.binp)->orig_size && - d->c.read_line.read_ahead) - need = (d->c.read_line.binp)->orig_size; -#endif - newbin = driver_alloc_binary(need); - if (newbin == NULL) { - d->result_ok = 0; - d->errInfo.posix_errno = ENOMEM; - d->again = 0; - break; - } - memcpy(newbin->orig_bytes, (d->c.read_line.binp)->orig_bytes + d->c.read_line.read_offset, - d->c.read_line.read_size); - driver_free_binary(d->c.read_line.binp); - d->c.read_line.binp = newbin; - d->c.read_line.read_offset = 0; - size = need - d->c.read_line.read_size; - } - if (d->flags & EFILE_COMPRESSED) { - read_size = erts_gzread((ErtsGzFile)d->fd, - d->c.read_line.binp->orig_bytes + - d->c.read_line.read_offset + d->c.read_line.read_size, - size); - status = (read_size != (size_t) -1); - if (!status) { - d->errInfo.posix_errno = EIO; - } - } else { - status = efile_read(&d->errInfo, d->flags, (int) d->fd, - d->c.read_line.binp->orig_bytes + - d->c.read_line.read_offset + d->c.read_line.read_size, - size, - &read_size); - } - if ( (d->result_ok = status)) { - void *nl_ptr = memchr((d->c.read_line.binp)->orig_bytes + - d->c.read_line.read_offset + d->c.read_line.read_size,'\n',read_size); - ASSERT(read_size <= size); - d->c.read_line.read_size += read_size; - if (nl_ptr != NULL) { - /* If found, we're done */ - d->c.read_line.nl_pos = ((char *) nl_ptr) - - ((char *) ((d->c.read_line.binp)->orig_bytes)) + 1; - if (d->c.read_line.nl_pos > 1 && - *(((char *) nl_ptr) - 1) == '\r') { - --d->c.read_line.nl_pos; - *(((char *) nl_ptr) - 1) = '\n'; - d->c.read_line.nl_skip = 1; - } else { - d->c.read_line.nl_skip = 0; - } - d->again = 0; -#if !ALWAYS_READ_LINE_AHEAD - if (!(d->c.read_line.read_ahead)) { - /* Ouch! Undo buffering... */ - size_t too_much = d->c.read_line.read_size - d->c.read_line.nl_skip - - (d->c.read_line.nl_pos - d->c.read_line.read_offset); - d->c.read_line.read_size -= too_much; - ASSERT(d->c.read_line.read_size >= 0); - if (d->flags & EFILE_COMPRESSED) { - Sint64 location = erts_gzseek((ErtsGzFile)d->fd, - -((Sint64) too_much), EFILE_SEEK_CUR); - if (location == -1) { - d->result_ok = 0; - d->errInfo.posix_errno = errno; - } - } else { - Sint64 location; - d->result_ok = efile_seek(&d->errInfo, (int) d->fd, - -((Sint64) too_much), EFILE_SEEK_CUR, - &location); - } - } -#endif - break; - } else if (read_size == 0) { - d->c.read_line.nl_pos = - d->c.read_line.read_offset + d->c.read_line.read_size; - d->c.read_line.nl_skip = 0; - d->again = 0; - break; - } - } else { - d->again = 0; - break; - } - } while (local_loop); - DTRACE_INVOKE_RETURN(FILE_READ_LINE); -} - -static void free_read_line(void *data) -{ - struct t_data *d = (struct t_data *) data; - - driver_free_binary(d->c.read_line.binp); - EF_FREE(d); -} - -static void invoke_read_file(void *data) -{ - struct t_data *d = (struct t_data *) data; - size_t read_size; - int chop; - DTRACE_INVOKE_SETUP(FILE_READ_FILE); - - if (! d->c.read_file.binp) { /* First invocation only */ - int fd; - Sint64 size; - - if (! (d->result_ok = - efile_openfile(&d->errInfo, d->b, - EFILE_MODE_READ, &fd, &size))) { - goto done; - } - d->fd = fd; - d->c.read_file.size = (int) size; - if (size < 0 || size != d->c.read_file.size || - ! (d->c.read_file.binp = - driver_alloc_binary(d->c.read_file.size))) { - d->result_ok = 0; - d->errInfo.posix_errno = ENOMEM; - goto close; - } - d->c.read_file.offset = 0; - } - /* Invariant: d->c.read_file.size >= d->c.read_file.offset */ - - read_size = (size_t) (d->c.read_file.size - d->c.read_file.offset); - if (! read_size) goto close; - chop = d->again && read_size >= FILE_SEGMENT_READ*2; - if (chop) read_size = FILE_SEGMENT_READ; - d->result_ok = - efile_read(&d->errInfo, - EFILE_MODE_READ, - (int) d->fd, - d->c.read_file.binp->orig_bytes + d->c.read_file.offset, - read_size, - &read_size); - if (d->result_ok) { - d->c.read_file.offset += read_size; - if (chop) goto chop_done; /* again */ - } - close: - efile_closefile((int) d->fd); - done: - d->again = 0; - chop_done: - DTRACE_INVOKE_RETURN(FILE_READ_FILE); -} - -static void free_read_file(void *data) -{ - struct t_data *d = (struct t_data *) data; - - if (d->c.read_file.binp) driver_free_binary(d->c.read_file.binp); - EF_FREE(d); -} - - - -static void invoke_preadv(void *data) -{ - struct t_data *d = (struct t_data *) data; - struct t_preadv *c = &d->c.preadv; - ErlIOVec *ev = &c->eiov; - size_t bytes_read_so_far = 0; - unsigned char *p = (unsigned char *)ev->iov[0].iov_base + 4+4+8*c->cnt; - DTRACE_INVOKE_SETUP(FILE_PREADV); - - while (c->cnt < c->n) { - size_t read_size = ev->iov[1 + c->cnt].iov_len - c->size; - size_t bytes_read = 0; - int chop = d->again - && bytes_read_so_far + read_size >= 2*FILE_SEGMENT_READ; - if (chop) { - ASSERT(bytes_read_so_far < FILE_SEGMENT_READ); - read_size = FILE_SEGMENT_READ + FILE_SEGMENT_READ/2 - - bytes_read_so_far; - } - if ( (d->result_ok - = efile_pread(&d->errInfo, - (int) d->fd, - c->offsets[c->cnt] + c->size, - ((char *)ev->iov[1 + c->cnt].iov_base) + c->size, - read_size, - &bytes_read))) { - bytes_read_so_far += bytes_read; - if (chop && bytes_read == read_size) { - c->size += bytes_read; - goto done; - } - ASSERT(bytes_read <= read_size); - ev->iov[1 + c->cnt].iov_len = bytes_read + c->size; - ev->size += bytes_read + c->size; - put_int64(bytes_read + c->size, p); p += 8; - c->size = 0; - c->cnt++; - if (d->again - && bytes_read_so_far >= FILE_SEGMENT_READ - && c->cnt < c->n) { - goto done; - } - } else { - /* In case of a read error, ev->size will not be correct, - * which does not matter since no read data is returned - * to Erlang. - */ - break; - } - } - d->again = 0; - done: - DTRACE_INVOKE_RETURN(FILE_PREADV); -} - -static void free_preadv(void *data) { - struct t_data *d = data; - int i; - ErlIOVec *ev = &d->c.preadv.eiov; - - for(i = 0; i < ev->vsize; i++) { - driver_free_binary(ev->binv[i]); - } - EF_FREE(d); -} - -static void invoke_ipread(void *data) -{ - struct t_data *d = data; - struct t_preadv *c = &d->c.preadv; - ErlIOVec *ev = &c->eiov; - size_t bytes_read = 0; - char buf[2*sizeof(Uint32)]; - Uint32 offset, size; - DTRACE_INVOKE_SETUP(FILE_IPREAD); - - /* Read indirection header */ - if (! efile_pread(&d->errInfo, (int) d->fd, c->offsets[0], - buf, sizeof(buf), &bytes_read)) { - goto error; - } - if (bytes_read != sizeof(buf)) goto done; /* eof */ - size = get_int32(buf); - offset = get_int32(buf+4); - if (size > c->size) goto done; /* eof */ - c->n = 1; - c->cnt = 0; - c->size = 0; - c->offsets[0] = offset; - if (! (ev->binv[0] = driver_alloc_binary(3*8))) { - d->errInfo.posix_errno = ENOMEM; - goto error; - } - ev->vsize = 1; - ev->iov[0].iov_len = 3*8; - ev->iov[0].iov_base = ev->binv[0]->orig_bytes; - ev->size = ev->iov[0].iov_len; - put_int64(offset, ev->iov[0].iov_base); - put_int64(size, ((char *)ev->iov[0].iov_base) + 2*8); - if (size == 0) { - put_int64(size, ((char *)ev->iov[0].iov_base) + 8); - goto done; - } - if (! (ev->binv[1] = driver_alloc_binary(size))) { - d->errInfo.posix_errno = ENOMEM; - goto error; - } - ev->vsize = 2; - ev->iov[1].iov_len = size; - ev->iov[1].iov_base = ev->binv[1]->orig_bytes; - /* Read data block */ - d->invoke = invoke_preadv; - invoke_preadv(data); - DTRACE_INVOKE_RETURN(FILE_IPREAD); - return; - error: - d->result_ok = 0; - d->again = 0; - DTRACE_INVOKE_RETURN(FILE_IPREAD); - return; - done: - d->result_ok = !0; - d->again = 0; - DTRACE_INVOKE_RETURN(FILE_IPREAD); -} - -/* invoke_writev and invoke_pwritev are the only thread functions that - * access non-thread data i.e the port queue and a mutex in the port - * structure that is used to lock the port queue. - * - * The port will normally not be terminated until the port queue is - * empty, but if the port is killed, i.e., exit(Port, kill) is called, - * it will terminate regardless of the port queue state. When the - * port is invalid driver_peekq() returns NULL and set the size to -1, - * and driver_sizeq() returns -1. - */ - -static void invoke_writev(void *data) { - struct t_data *d = (struct t_data *) data; - SysIOVec *iov0; - SysIOVec *iov; - int iovlen; - int iovcnt; - size_t size; - size_t p; - int segment; - DTRACE_INVOKE_SETUP(FILE_WRITE); - - segment = d->again && d->c.writev.size >= 2*FILE_SEGMENT_WRITE; - if (segment) { - size = FILE_SEGMENT_WRITE; - } else { - size = d->c.writev.size; - } - - /* Copy the io vector to avoid locking the port que while writing, - * also, both we and efile_writev might/will change the SysIOVec - * when segmenting or due to partial write and we do not want to - * tamper with the actual queue that we get from driver_peekq - */ - MUTEX_LOCK(d->c.writev.q_mtx); /* Lock before accessing the port queue */ - iov0 = driver_peekq(d->c.writev.port, &iovlen); - - /* Calculate iovcnt */ - for (p = 0, iovcnt = 0; - p < size && iovcnt < iovlen; - p += iov0[iovcnt++].iov_len) - ; - iov = EF_SAFE_ALLOC(sizeof(SysIOVec)*iovcnt); - memcpy(iov,iov0,iovcnt*sizeof(SysIOVec)); - MUTEX_UNLOCK(d->c.writev.q_mtx); - /* Let go of lock until we deque from original vector */ - - if (iovlen > 0) { - ASSERT(iov[iovcnt-1].iov_len > p - size); - iov[iovcnt-1].iov_len -= p - size; - if (d->flags & EFILE_COMPRESSED) { - int i, status = 1; - for (i = 0; i < iovcnt; i++) { - if (iov[i].iov_base && iov[i].iov_len > 0) { - /* Just in case, I do not know what gzwrite does - * with errno. - */ - errno = EINVAL; - status = erts_gzwrite((ErtsGzFile)d->fd, - iov[i].iov_base, - iov[i].iov_len) == iov[i].iov_len; - if (! status) { - d->errInfo.posix_errno = - d->errInfo.os_errno = errno; /* XXX Correct? */ - break; - } - } - } - d->result_ok = status; - } else { - d->result_ok = efile_writev(&d->errInfo, - d->flags, (int) d->fd, - iov, iovcnt); - } - } else if (iovlen == 0) { - d->result_ok = 1; - } - else { /* Port has terminated */ - d->result_ok = 0; - d->errInfo.posix_errno = d->errInfo.os_errno = EINVAL; - } - EF_FREE(iov); - - if (! d->result_ok) { - d->again = 0; - MUTEX_LOCK(d->c.writev.q_mtx); - driver_deq(d->c.writev.port, d->c.writev.size); - MUTEX_UNLOCK(d->c.writev.q_mtx); - } else { - if (! segment) { - d->again = 0; - } - d->c.writev.size -= size; - TRACE_F(("w%lu", (unsigned long)size)); - MUTEX_LOCK(d->c.writev.q_mtx); - driver_deq(d->c.writev.port, size); - MUTEX_UNLOCK(d->c.writev.q_mtx); - } - - - DTRACE_INVOKE_RETURN(FILE_WRITE); -} - -static void invoke_pwd(void *data) -{ - struct t_data *d = (struct t_data *) data; - DTRACE_INVOKE_SETUP(FILE_PWD); - - d->again = 0; - d->result_ok = efile_getdcwd(&d->errInfo,d->drive, d->b+1, - RESBUFSIZE-1); - DTRACE_INVOKE_RETURN(FILE_PWD); -} - -static void invoke_readlink(void *data) -{ - struct t_data *d = (struct t_data *) data; - char resbuf[RESBUFSIZE]; /* Result buffer. */ - DTRACE_INVOKE_SETUP(FILE_READLINK); - - d->again = 0; - d->result_ok = efile_readlink(&d->errInfo, d->b, resbuf+1, - RESBUFSIZE-1); - if (d->result_ok != 0) - FILENAME_COPY((char *) d->b + 1, resbuf+1); - DTRACE_INVOKE_RETURN(FILE_READLINK); -} - -static void invoke_altname(void *data) -{ - struct t_data *d = (struct t_data *) data; - char resbuf[RESBUFSIZE]; /* Result buffer. */ - DTRACE_INVOKE_SETUP(FILE_ALTNAME); - - d->again = 0; - d->result_ok = efile_altname(&d->errInfo, d->b, resbuf+1, - RESBUFSIZE-1); - if (d->result_ok != 0) - FILENAME_COPY((char *) d->b + 1, resbuf+1); - DTRACE_INVOKE_RETURN(FILE_ALTNAME); -} - -static void invoke_pwritev(void *data) { - struct t_data* const d = (struct t_data *) data; - struct t_pwritev * const c = &d->c.pwritev; - SysIOVec *iov0; - SysIOVec *iov; - int iovlen; - int iovcnt; - size_t p; - int segment; - size_t size, write_size, written; - DTRACE_INVOKE_SETUP(FILE_PWRITEV); - - segment = d->again && c->size >= 2*FILE_SEGMENT_WRITE; - if (segment) { - size = FILE_SEGMENT_WRITE; - } else { - size = c->size; - } - d->result_ok = !0; - p = 0; - /* Lock the queue just for a while, we don't want it locked during write */ - MUTEX_LOCK(c->q_mtx); - iov0 = driver_peekq(c->port, &iovlen); - iov = EF_SAFE_ALLOC(sizeof(SysIOVec)*iovlen); - memcpy(iov,iov0,sizeof(SysIOVec)*iovlen); - MUTEX_UNLOCK(c->q_mtx); - - if (iovlen < 0) - goto error; /* Port terminated */ - for (iovcnt = 0, written = 0; - c->cnt < c->n && iovcnt < iovlen && written < size; - c->cnt++) { - int chop; - write_size = c->specs[c->cnt].size; - if (iov[iovcnt].iov_len - p < write_size) { - goto error; - } - chop = segment && written + write_size >= 2*FILE_SEGMENT_WRITE; - if (chop) { - ASSERT(written < FILE_SEGMENT_WRITE); - write_size = FILE_SEGMENT_WRITE + FILE_SEGMENT_WRITE/2 - - written; - } - d->result_ok = efile_pwrite(&d->errInfo, (int) d->fd, - (char *)(iov[iovcnt].iov_base) + p, - write_size, - c->specs[c->cnt].offset); - if (! d->result_ok) { - d->again = 0; - goto deq_error; - } - written += write_size; - c->size -= write_size; - if (chop) { - c->specs[c->cnt].offset += write_size; - c->specs[c->cnt].size -= write_size; - /* Schedule out (d->again != 0) */ - break; - } - /* Move forward in buffer */ - p += write_size; - ASSERT(iov[iovcnt].iov_len >= p); - if (iov[iovcnt].iov_len == p) { - /* Move to next iov[], we trust that it is not a - * zero length vector, and thereby depend on that - * such are not queued. - */ - iovcnt++; p = 0; - } - } - if (! segment) { - if (c->cnt != c->n) { - /* Mismatch between number of - * pos/size specs vs number of queued buffers . - */ - error: - d->errInfo.posix_errno = EINVAL; - d->result_ok = 0; - d->again = 0; - deq_error: - MUTEX_LOCK(c->q_mtx); - driver_deq(c->port, c->size); - MUTEX_UNLOCK(c->q_mtx); - - goto done; - } else { - ASSERT(written == size); - d->again = 0; - } - } else { - ASSERT(written >= FILE_SEGMENT_WRITE); - } - - MUTEX_LOCK(c->q_mtx); - driver_deq(c->port, written); - MUTEX_UNLOCK(c->q_mtx); - done: - EF_FREE(iov); /* Free our copy of the vector, nothing to restore */ - - DTRACE_INVOKE_RETURN(FILE_PWRITEV); -} - -static void invoke_flstat(void *data) -{ - struct t_data *d = (struct t_data *) data; - - DTRACE3(efile_drv_int_entry, d->sched_i1, d->sched_i2, - d->command == FILE_LSTAT ? FILE_LSTAT : FILE_FSTAT); - d->again = 0; - d->result_ok = efile_fileinfo(&d->errInfo, &d->info, - d->b, d->command == FILE_LSTAT); - DTRACE3(efile_drv_int_entry, d->sched_i1, d->sched_i2, - d->command == FILE_LSTAT ? FILE_LSTAT : FILE_FSTAT); - gcc_optimizer_hack++; -} - -static void invoke_link(void *data) -{ - struct t_data *d = (struct t_data *) data; - char *name = d->b; - char *new_name; - DTRACE_INVOKE_SETUP(FILE_LINK); - - d->again = 0; - new_name = name+FILENAME_BYTELEN(name)+FILENAME_CHARSIZE; - d->result_ok = efile_link(&d->errInfo, name, new_name); - DTRACE_INVOKE_RETURN(FILE_LINK); -} - -static void invoke_symlink(void *data) -{ - struct t_data *d = (struct t_data *) data; - char *name = d->b; - char *new_name; - DTRACE_INVOKE_SETUP(FILE_SYMLINK); - - d->again = 0; - new_name = name+FILENAME_BYTELEN(name)+FILENAME_CHARSIZE; - d->result_ok = efile_symlink(&d->errInfo, name, new_name); - DTRACE_INVOKE_RETURN(FILE_SYMLINK); -} - -static void invoke_rename(void *data) -{ - struct t_data *d = (struct t_data *) data; - char *name = d->b; - char *new_name; - DTRACE_INVOKE_SETUP(FILE_RENAME); - - d->again = 0; - new_name = name+FILENAME_BYTELEN(name)+FILENAME_CHARSIZE; - d->result_ok = efile_rename(&d->errInfo, name, new_name); - DTRACE_INVOKE_RETURN(FILE_RENAME); -} - -static void invoke_write_info(void *data) -{ - struct t_data *d = (struct t_data *) data; - DTRACE_INVOKE_SETUP(FILE_WRITE_INFO); - - d->again = 0; - d->result_ok = efile_write_info(&d->errInfo, &d->info, d->b); - DTRACE_INVOKE_RETURN(FILE_WRITE_INFO); -} - -static void invoke_lseek(void *data) -{ - struct t_data *d = (struct t_data *) data; - int status; - DTRACE_INVOKE_SETUP(FILE_LSEEK); - - d->again = 0; - if (d->flags & EFILE_COMPRESSED) { - int offset = (int) d->c.lseek.offset; - - if (offset != d->c.lseek.offset) { - d->errInfo.posix_errno = EINVAL; - status = 0; - } else { - d->c.lseek.location = erts_gzseek((ErtsGzFile)d->fd, - offset, d->c.lseek.origin); - if (d->c.lseek.location == -1) { - d->errInfo.posix_errno = errno; - status = 0; - } else { - status = 1; - } - } - } else { - status = efile_seek(&d->errInfo, (int) d->fd, - d->c.lseek.offset, d->c.lseek.origin, - &d->c.lseek.location); - } - d->result_ok = status; - DTRACE_INVOKE_RETURN(FILE_LSEEK); -} - -static void invoke_readdir(void *data) -{ - struct t_data *d = (struct t_data *) data; - char *p = NULL; - size_t file_bs; - size_t n = 0, total = 0; - struct t_readdir_buf *b = NULL; - int res = 0; - DTRACE_INVOKE_SETUP(FILE_READDIR); - - d->again = 0; - d->errInfo.posix_errno = 0; - - do { - total = READDIR_BUFSIZE; - n = 1; - b = EF_SAFE_ALLOC(sizeof(struct t_readdir_buf)); - b->next = NULL; - - if (d->c.read_dir.last_buf) { - d->c.read_dir.last_buf->next = b; - } else { - d->c.read_dir.first_buf = b; - } - d->c.read_dir.last_buf = b; - - p = &b->buf[0]; - p[0] = FILE_RESP_LFNAME; - file_bs = READDIR_BUFSIZE - n; - - do { - res = efile_readdir(&d->errInfo, d->b, &d->dir_handle, p + n + 2, &file_bs); - - if (res) { - put_int16((Uint16)file_bs, p + n); - n += 2 + file_bs; - file_bs = READDIR_BUFSIZE - n; - } - } while( res && ((total - n - 2) >= MAXPATHLEN*FILENAME_CHARSIZE)); - - b->n = n; - } while(res); - - d->result_ok = (d->errInfo.posix_errno == 0); - DTRACE_INVOKE_RETURN(FILE_READDIR); -} - -static void invoke_open(void *data) -{ - struct t_data *d = (struct t_data *) data; - int status = 1; /* Status of open call. */ - DTRACE_INVOKE_SETUP(FILE_OPEN); - - d->again = 0; - if ((d->flags & EFILE_COMPRESSED) == 0) { - int fd; - status = efile_openfile(&d->errInfo, d->b, d->flags, &fd, NULL); - d->fd = fd; - } else { - char* mode = NULL; - - if (((d->flags & (EFILE_MODE_READ_WRITE)) == EFILE_MODE_READ_WRITE) || - (d->flags & EFILE_MODE_APPEND)) { - status = 0; - d->errInfo.posix_errno = EINVAL; - } else { - status = efile_may_openfile(&d->errInfo, d->b); - if (status || (d->errInfo.posix_errno != EISDIR)) { - mode = (d->flags & EFILE_MODE_READ) ? "rb" : "wb"; - d->fd = (SWord) erts_gzopen(d->b, mode); - if ((ErtsGzFile)d->fd) { - status = 1; - } else { - if (errno == 0) { - errno = ENOMEM; - } - d->errInfo.posix_errno = errno; - status = 0; - } - } - } - } - - d->result_ok = status; - if (!status) { - d->fd = FILE_FD_INVALID; - } - DTRACE_INVOKE_RETURN(FILE_OPEN); -} - -static void invoke_fadvise(void *data) -{ - struct t_data *d = (struct t_data *) data; - int fd = (int) d->fd; - off_t offset = (off_t) d->c.fadvise.offset; - off_t length = (off_t) d->c.fadvise.length; - int advise = (int) d->c.fadvise.advise; - DTRACE_INVOKE_SETUP(FILE_FADVISE); - - d->again = 0; - d->result_ok = efile_fadvise(&d->errInfo, fd, offset, length, advise); - DTRACE_INVOKE_RETURN(FILE_FADVISE); -} - -#ifdef HAVE_SENDFILE -static void invoke_sendfile(void *data) -{ - struct t_data *d = (struct t_data *)data; - int fd = d->fd; - int out_fd = (int)d->c.sendfile.out_fd; - Uint64 nbytes = d->c.sendfile.nbytes; - int result = 0; - d->again = 0; - - result = efile_sendfile(&d->errInfo, fd, out_fd, &d->c.sendfile.offset, &nbytes, NULL); - - d->c.sendfile.written += nbytes; - - if (result == 1 || (result == 0 && USE_THRDS_FOR_SENDFILE(d))) { - d->result_ok = 0; - } else if (result == 0 && (d->errInfo.posix_errno == EAGAIN - || d->errInfo.posix_errno == EINTR)) { - if ((d->c.sendfile.nbytes - nbytes) != 0) { - d->result_ok = 1; - if (d->c.sendfile.nbytes != 0) - d->c.sendfile.nbytes -= nbytes; - } else if (nbytes == 0 && d->c.sendfile.nbytes == 0) { - d->result_ok = 1; - } else - d->result_ok = 0; - } else { - d->result_ok = -1; - } -} - -static void free_sendfile(void *data) { - struct t_data *d = (struct t_data *)data; - if (USE_THRDS_FOR_SENDFILE(d)) { - SET_NONBLOCKING(d->c.sendfile.out_fd); - } else { - MUTEX_LOCK(d->c.sendfile.q_mtx); - driver_deq(d->c.sendfile.port,1); - MUTEX_UNLOCK(d->c.sendfile.q_mtx); - driver_select(d->c.sendfile.port, (ErlDrvEvent)(long)d->c.sendfile.out_fd, - ERL_DRV_USE_NO_CALLBACK|ERL_DRV_WRITE, 0); - } - EF_FREE(data); -} - -static void file_ready_output(ErlDrvData data, ErlDrvEvent event) -{ - file_descriptor* fd = (file_descriptor*) data; - - switch (fd->d->command) { - case FILE_SENDFILE: - driver_select(fd->d->c.sendfile.port, event, - (int)ERL_DRV_WRITE,(int) 0); - invoke_sendfile((void *)fd->d); - file_async_ready(data, (ErlDrvThreadData)fd->d); - break; - default: - break; - } -} - -static void file_stop_select(ErlDrvEvent event, void* _) -{ - -} - -static int flush_sendfile(file_descriptor *desc,void *_) { - if (desc->sendfile_state == sending) { - desc->d->result_ok = -1; - desc->d->errInfo.posix_errno = ECONNABORTED; - file_async_ready((ErlDrvData)desc,(ErlDrvThreadData)desc->d); - } - return 1; -} -#endif /* HAVE_SENDFILE */ - - -static void invoke_fallocate(void *data) -{ - struct t_data *d = (struct t_data *) data; - int fd = (int) d->fd; - Sint64 offset = d->c.fallocate.offset; - Sint64 length = d->c.fallocate.length; - - d->again = 0; - d->result_ok = efile_fallocate(&d->errInfo, fd, offset, length); -} - -static void free_readdir(void *data) -{ - struct t_data *d = (struct t_data *) data; - struct t_readdir_buf *b1 = d->c.read_dir.first_buf; - - while (b1) { - struct t_readdir_buf *b2 = b1; - b1 = b1->next; - EF_FREE(b2); - } - EF_FREE(d); -} - - - -static void try_free_read_bin(file_descriptor *desc) { - if ((desc->read_size == 0) - && (desc->read_offset >= desc->read_binp->orig_size)) { - ASSERT(desc->read_offset == desc->read_binp->orig_size); - driver_free_binary(desc->read_binp); - desc->read_binp = NULL; - desc->read_offset = 0; - desc->read_size = 0; - } -} - - - -static int try_again(file_descriptor *desc, struct t_data *d) { - if (! d->again) - return 0; - if (desc->timer_state != timer_idle) { - driver_cancel_timer(desc->port); - } - desc->timer_state = timer_again; - desc->invoke = d->invoke; - desc->d = d; - desc->free = d->free; - driver_set_timer(desc->port, 0L); - return !0; -} - - - -static void cq_execute(file_descriptor *desc) { - struct t_data *d; - register void *void_ptr; /* Soft cast variable */ - if (desc->timer_state == timer_again) - return; -#ifdef HAVE_SENDFILE - if (desc->sendfile_state == sending) - return; -#endif - if (! (d = cq_deq(desc))) - return; - TRACE_F(("x%i", (int) d->command)); - d->again = sys_info.async_threads == 0; - DRIVER_ASYNC(d->level, desc, d->invoke, void_ptr=d, d->free); -} - -static struct t_data *async_write(file_descriptor *desc, int *errp, - int reply, Uint32 reply_size -#ifdef USE_VM_PROBES - ,Sint64 *dt_i1, Sint64 *dt_i2, Sint64 *dt_i3 -#endif -) { - struct t_data *d; - if (! (d = EF_ALLOC(sizeof(struct t_data) - 1))) { - if (errp) *errp = ENOMEM; - return NULL; - } - TRACE_F(("w%lu", (unsigned long)desc->write_buffered)); - d->command = FILE_WRITE; - d->fd = desc->fd; - d->flags = desc->flags; - d->c.writev.port = desc->port; - d->c.writev.q_mtx = desc->q_mtx; - d->c.writev.size = desc->write_buffered; -#ifdef USE_VM_PROBES - if (dt_i1 != NULL) { - *dt_i1 = d->fd; - *dt_i2 = d->flags; - *dt_i3 = d->c.writev.size; - } -#endif - d->reply = reply; - d->c.writev.reply_size = reply_size; - d->invoke = invoke_writev; - d->free = free_data; - d->level = 1; - cq_enq(desc, d); - desc->write_buffered = 0; - return d; -} - -static int flush_write(file_descriptor *desc, int *errp -#ifdef USE_VM_PROBES - , dt_private *dt_priv, char *dt_utag -#endif -) { - int result = 0; -#ifdef USE_VM_PROBES - Sint64 dt_i1 = 0, dt_i2 = 0, dt_i3 = 0; -#endif - struct t_data *d = NULL; - - MUTEX_LOCK(desc->q_mtx); - if (desc->write_buffered > 0) { - if ((d = async_write(desc, errp, 0, 0 -#ifdef USE_VM_PROBES - ,&dt_i1, &dt_i2, &dt_i3 -#endif - )) == NULL) { - result = -1; - } - } - MUTEX_UNLOCK(desc->q_mtx); -#ifdef USE_VM_PROBES - if (d != NULL) { - d->sched_i1 = dt_priv->thread_num; - d->sched_i2 = dt_priv->tag; - d->sched_utag[0] = '\0'; - if (dt_utag != NULL) { - if (dt_utag[0] == '\0') { - dt_utag = NULL; - } else { - strncpy(d->sched_utag, dt_utag, sizeof(d->sched_utag) - 1); - d->sched_utag[sizeof(d->sched_utag) - 1] = '\0'; - } - } - DTRACE11(efile_drv_entry, dt_priv->thread_num, dt_priv->tag++, - dt_utag, FILE_WRITE, - NULL, NULL, dt_i1, dt_i2, dt_i3, 0, desc->port_str); - } -#endif /* USE_VM_PROBES */ - return result; -} - -static int check_write_error(file_descriptor *desc, int *errp) { - if (desc->write_error) { - if (errp) *errp = desc->write_errInfo.posix_errno; - desc->write_error = 0; - return -1; - } - return 0; -} - -static int flush_write_check_error(file_descriptor *desc, int *errp -#ifdef USE_VM_PROBES - , dt_private *dt_priv, char *dt_utag -#endif - ) { - int r; - if ( (r = flush_write(desc, errp -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - )) != 0) { - check_write_error(desc, NULL); - return r; - } else { - return check_write_error(desc, errp); - } -} - -static struct t_data *async_lseek(file_descriptor *desc, int *errp, int reply, - Sint64 offset, int origin -#ifdef USE_VM_PROBES - , Sint64 *dt_i1, Sint64 *dt_i2, Sint64 *dt_i3 -#endif - ) { - struct t_data *d; - if (! (d = EF_ALLOC(sizeof(struct t_data)))) { - *errp = ENOMEM; - return NULL; - } - d->flags = desc->flags; - d->fd = desc->fd; - d->command = FILE_LSEEK; - d->reply = reply; - d->c.lseek.offset = offset; - d->c.lseek.origin = origin; -#ifdef USE_VM_PROBES - if (dt_i1 != NULL) { - *dt_i1 = d->fd; - *dt_i2 = d->c.lseek.offset; - *dt_i3 = d->c.lseek.origin; - } -#endif - d->invoke = invoke_lseek; - d->free = free_data; - d->level = 1; - cq_enq(desc, d); - return d; -} - -static void flush_read(file_descriptor *desc) { - desc->read_offset = 0; - desc->read_size = 0; - if (desc->read_binp) { - driver_free_binary(desc->read_binp); - desc->read_binp = NULL; - } -} - -static int lseek_flush_read(file_descriptor *desc, int *errp -#ifdef USE_VM_PROBES - ,dt_private *dt_priv, char *dt_utag -#endif - ) { - int r = 0; - size_t read_size = desc->read_size; -#ifdef USE_VM_PROBES - Sint64 dt_i1 = 0, dt_i2 = 0, dt_i3 = 0; -#endif - struct t_data *d; - - flush_read(desc); - if (read_size != 0) { - if ((d = async_lseek(desc, errp, 0, - -((ssize_t)read_size), EFILE_SEEK_CUR -#ifdef USE_VM_PROBES - , &dt_i1, &dt_i2, &dt_i3 -#endif - )) == NULL) { - r = -1; - } else { -#ifdef USE_VM_PROBES - d->sched_i1 = dt_priv->thread_num; - d->sched_i2 = dt_priv->tag; - d->sched_utag[0] = '\0'; - if (dt_utag != NULL) { - if (dt_utag[0] == '\0') { - dt_utag = NULL; - } else { - strncpy(d->sched_utag, dt_utag, sizeof(d->sched_utag) - 1); - d->sched_utag[sizeof(d->sched_utag) - 1] = '\0'; - } - } - DTRACE11(efile_drv_entry, dt_priv->thread_num, dt_priv->tag++, - dt_utag, FILE_LSEEK, - NULL, NULL, dt_i1, dt_i2, dt_i3, 0, desc->port_str); -#endif /* USE_VM_PROBES */ - } - } - return r; -} - - -/********************************************************************* - * Driver entry point -> stop - * The close has to be scheduled on async thread, so that currently active - * async operation does not suddenly have the ground disappearing under their feet... - */ -static void -file_stop(ErlDrvData e) -{ - file_descriptor* desc = (file_descriptor*)e; - - TRACE_C('p'); - - IF_THRDS { - flush_read(desc); - if (desc->fd != FILE_FD_INVALID) { - struct t_data *d = EF_SAFE_ALLOC(sizeof(struct t_data)); - d->command = FILE_CLOSE_ON_PORT_EXIT; - d->reply = !0; - d->fd = desc->fd; - d->flags = desc->flags; - d->invoke = invoke_close; - d->free = free_data; - d->level = 2; - d->data_to_free = (void *) desc; - cq_enq(desc, d); - desc->fd = FILE_FD_INVALID; - desc->flags = 0; - cq_execute(desc); - } else { - EF_FREE(desc); - } - } else { - if (desc->fd != FILE_FD_INVALID) { - do_close(desc->flags, desc->fd); - desc->fd = FILE_FD_INVALID; - desc->flags = 0; - } - if (desc->read_binp) { - driver_free_binary(desc->read_binp); - } - EF_FREE(desc); - } -} - -/********************************************************************* - * Driver entry point -> ready_async - */ -static void -file_async_ready(ErlDrvData e, ErlDrvThreadData data) -{ - file_descriptor *desc = (file_descriptor*)e; - struct t_data *d = (struct t_data *) data; - char header[5]; /* result code + count */ - char resbuf[RESBUFSIZE]; /* Result buffer. */ -#ifdef USE_VM_PROBES - int sched_i1 = d->sched_i1, sched_i2 = d->sched_i2, command = d->command, - result_ok = d->result_ok, - posix_errno = d->result_ok ? 0 : d->errInfo.posix_errno; - DTRACE_CHARBUF(sched_utag, DTRACE_EFILE_BUFSIZ+1); - - sched_utag[0] = '\0'; - if (DTRACE_ENABLED(efile_drv_return)) { - strncpy(sched_utag, d->sched_utag, DTRACE_EFILE_BUFSIZ); - sched_utag[DTRACE_EFILE_BUFSIZ] = '\0'; - } -#endif /* USE_VM_PROBES */ - - TRACE_C('r'); - - if (try_again(desc, d)) { - /* DTRACE TODO: what kind of probe makes sense here? */ - return; - } - - switch (d->command) - { - case FILE_READ: - if (!d->result_ok) { - reply_error(desc, &d->errInfo); - } else { - size_t available_bytes = - d->c.read.bin_offset + d->c.read.bin_size - desc->read_offset; - if (available_bytes < d->c.read.size) { - d->c.read.size = available_bytes; - } - TRACE_C('D'); - reply_data(desc, d->c.read.binp, - desc->read_offset, d->c.read.size); - desc->read_offset += d->c.read.size; - desc->read_size = - d->c.read.bin_offset + d->c.read.bin_size - desc->read_offset; - try_free_read_bin(desc); - } - free_read(data); - break; - case FILE_READ_LINE: - /* The read_line structure differs from the read structure. - The data->read_offset and d->c.read_line.read_offset are copies, as are - data->read_size and d->c.read_line.read_size - The read_line function does not kniow in advance how large the binary has to be, - why new allocation (but not reallocation of the old binary, for obvious reasons) - may happen in the worker thread. */ - if (!d->result_ok) { - reply_error(desc, &d->errInfo); - } else { - size_t len = d->c.read_line.nl_pos - d->c.read_line.read_offset; - TRACE_C('L'); - reply_data(desc, d->c.read_line.binp, - d->c.read_line.read_offset, len); - desc->read_offset = d->c.read_line.read_offset + d->c.read_line.nl_skip + len; - desc->read_size = - d->c.read_line.read_size - d->c.read_line.nl_skip - len; - if (desc->read_binp != d->c.read_line.binp) { /* New binary allocated */ - driver_free_binary(desc->read_binp); - desc->read_binp = d->c.read_line.binp; - driver_binary_inc_refc(desc->read_binp); - } -#if !ALWAYS_READ_LINE_AHEAD - ASSERT(desc->read_bufsize > 0 || desc->read_size == 0); - if (desc->read_bufsize == 0) { - desc->read_offset = desc->read_binp->orig_size; /* triggers cleanup */ - } -#endif - try_free_read_bin(desc); - } - free_read_line(data); - break; - case FILE_READ_FILE: - if (!d->result_ok) - reply_error(desc, &d->errInfo); - else { - header[0] = FILE_RESP_ALL_DATA; - TRACE_C('R'); - driver_output_binary(desc->port, header, 1, - d->c.read_file.binp, - 0, d->c.read_file.offset); - } - free_read_file(data); - break; - case FILE_WRITE: - if (d->reply) { - if (! d->result_ok) { - reply_error(desc, &d->errInfo); - } else { - reply_Uint(desc, d->c.writev.reply_size); - } - } else { - if (! d->result_ok) { - desc->write_error = !0; - desc->write_errInfo = d->errInfo; - } - } - free_data(data); - break; - case FILE_LSEEK: - if (d->reply) { - if (d->result_ok) - reply_Sint64(desc, d->c.lseek.location); - else - reply_error(desc, &d->errInfo); - } - free_data(data); - break; - case FILE_MKDIR: - case FILE_RMDIR: - case FILE_CHDIR: - case FILE_DELETE: - case FILE_FDATASYNC: - case FILE_FSYNC: - case FILE_TRUNCATE: - case FILE_LINK: - case FILE_SYMLINK: - case FILE_RENAME: - case FILE_WRITE_INFO: - case FILE_FADVISE: - case FILE_FALLOCATE: - reply(desc, d->result_ok, &d->errInfo); - free_data(data); - break; - case FILE_ALTNAME: - case FILE_PWD: - case FILE_READLINK: - { - int length; - char *resbuf = d->b; - - if (!d->result_ok) - reply_error(desc, &d->errInfo); - else { - resbuf[0] = FILE_RESP_FNAME; - length = 1+FILENAME_BYTELEN((char*) resbuf+1); - TRACE_C('R'); - driver_output2(desc->port, resbuf, 1, resbuf+1, length-1); - } - free_data(data); - break; - } - case FILE_OPEN: - if (!d->result_ok) { - reply_error(desc, &d->errInfo); - } else { - ASSERT(d->is_fd_unused); - desc->fd = d->fd; - desc->flags = d->flags; - d->is_fd_unused = 0; - reply_Uint(desc, d->fd); - } - free_data(data); - break; - case FILE_FSTAT: - case FILE_LSTAT: - { - if (d->result_ok) { - resbuf[0] = FILE_RESP_INFO; - - put_int32(d->info.size_high, &resbuf[1 + ( 0 * 4)]); - put_int32(d->info.size_low, &resbuf[1 + ( 1 * 4)]); - put_int32(d->info.type, &resbuf[1 + ( 2 * 4)]); - - /* Note 64 bit indexing in resbuf here */ - put_int64(d->info.accessTime, &resbuf[1 + ( 3 * 4)]); - put_int64(d->info.modifyTime, &resbuf[1 + ( 5 * 4)]); - put_int64(d->info.cTime, &resbuf[1 + ( 7 * 4)]); - - put_int32(d->info.mode, &resbuf[1 + ( 9 * 4)]); - put_int32(d->info.links, &resbuf[1 + (10 * 4)]); - put_int32(d->info.major_device, &resbuf[1 + (11 * 4)]); - put_int32(d->info.minor_device, &resbuf[1 + (12 * 4)]); - put_int32(d->info.inode, &resbuf[1 + (13 * 4)]); - put_int32(d->info.uid, &resbuf[1 + (14 * 4)]); - put_int32(d->info.gid, &resbuf[1 + (15 * 4)]); - put_int32(d->info.access, &resbuf[1 + (16 * 4)]); - -#define RESULT_SIZE (1 + (17 * 4)) - TRACE_C('R'); - driver_output2(desc->port, resbuf, RESULT_SIZE, NULL, 0); -#undef RESULT_SIZE - } else - reply_error(desc, &d->errInfo); - } - free_data(data); - break; - case FILE_READDIR: - if (!d->result_ok) { - reply_error(desc, &d->errInfo); - } else { - struct t_readdir_buf *b1 = d->c.read_dir.first_buf; - char op = FILE_RESP_LFNAME; - - TRACE_C('R'); - ASSERT(b1); - - while (b1) { - struct t_readdir_buf *b2 = b1; - char *p = &b1->buf[0]; - driver_output2(desc->port, p, 1, p + 1, b1->n - 1); - b1 = b1->next; - EF_FREE(b2); - } - driver_output2(desc->port, &op, 1, NULL, 0); - - d->c.read_dir.first_buf = NULL; - d->c.read_dir.last_buf = NULL; - } - free_readdir(data); - break; - case FILE_CLOSE: - if (d->reply) { - TRACE_C('K'); - reply_ok(desc); -#ifdef USE_VM_PROBES - result_ok = 1; -#endif - } - free_data(data); - break; - case FILE_PWRITEV: - if (!d->result_ok) { - reply_Uint_error(desc, d->c.pwritev.cnt, &d->errInfo); - } else { - reply_Uint(desc, d->c.pwritev.n); - } - free_data(data); - break; - case FILE_PREADV: - if (!d->result_ok) { - reply_error(desc, &d->errInfo); - } else { - reply_ev(desc, FILE_RESP_LDATA, &d->c.preadv.eiov); - } - free_preadv(data); - break; - case FILE_IPREAD: - if (!d->result_ok) { - reply_error(desc, &d->errInfo); - } else if (!d->c.preadv.eiov.vsize) { - reply_eof(desc); - } else { - reply_ev(desc, FILE_RESP_N2DATA, &d->c.preadv.eiov); - } - free_preadv(data); - break; -#ifdef HAVE_SENDFILE - case FILE_SENDFILE: - if (d->result_ok == -1) { - if (d->errInfo.posix_errno == ECONNRESET || - d->errInfo.posix_errno == ENOTCONN || - d->errInfo.posix_errno == EPIPE) - reply_string_error(desc,"closed"); - else - reply_error(desc, &d->errInfo); - desc->sendfile_state = not_sending; - free_sendfile(data); - } else if (d->result_ok == 0) { - reply_Sint64(desc, d->c.sendfile.written); - desc->sendfile_state = not_sending; - free_sendfile(data); - } else if (d->result_ok == 1) { /* If we are using select to send the rest of the data */ - desc->sendfile_state = sending; - desc->d = d; - driver_select(desc->port, (ErlDrvEvent)(long)d->c.sendfile.out_fd, - ERL_DRV_USE|ERL_DRV_WRITE, 1); - } - break; -#endif - case FILE_CLOSE_ON_PORT_EXIT: - /* See file_stop. However this is never invoked after the port is killed. */ - free_data(data); - desc = NULL; - /* This is it for this port, so just send dtrace and return, avoid doing anything to the freed data */ - DTRACE6(efile_drv_return, sched_i1, sched_i2, sched_utag, - command, result_ok, posix_errno); - return; - default: - abort(); - } - DTRACE6(efile_drv_return, sched_i1, sched_i2, sched_utag, - command, result_ok, posix_errno); - if (desc->write_buffered != 0 && desc->timer_state == timer_idle ) { - desc->timer_state = timer_write; - driver_set_timer(desc->port, desc->write_delay); - } - cq_execute(desc); - -} - - -/********************************************************************* - * Driver entry point -> output - */ -static void -file_output(ErlDrvData e, char* buf, ErlDrvSizeT count) -{ - file_descriptor* desc = (file_descriptor*)e; - Efile_error errInfo; /* The error codes for the last operation. */ - Sint fd; /* The file descriptor for this port, if any, - * -1 if none. - */ - char* name; /* Points to the filename in buf. */ - int command; - struct t_data *d = NULL; -#ifdef USE_VM_PROBES - char *dt_utag = NULL; - char *dt_s1 = NULL, *dt_s2 = NULL; - Sint64 dt_i1 = 0; - Sint64 dt_i2 = 0; - Sint64 dt_i3 = 0; - Sint64 dt_i4 = 0; - dt_private *dt_priv = get_dt_private(0); -#endif /* USE_VM_PROBES */ - - TRACE_C('o'); - - fd = desc->fd; - name = buf+1; - command = *(uchar*)buf++; - - switch(command) { - - case FILE_MKDIR: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + FILENAME_BYTELEN(name) + FILENAME_CHARSIZE); - - FILENAME_COPY(d->b, name); -#ifdef USE_VM_PROBES - dt_s1 = d->b; - dt_utag = name + FILENAME_BYTELEN(name) + FILENAME_CHARSIZE; -#endif - d->command = command; - d->invoke = invoke_mkdir; - d->free = free_data; - d->level = 2; - goto done; - } - case FILE_RMDIR: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + FILENAME_BYTELEN(name) + FILENAME_CHARSIZE); - - FILENAME_COPY(d->b, name); -#ifdef USE_VM_PROBES - dt_s1 = d->b; - dt_utag = name + FILENAME_BYTELEN(name) + FILENAME_CHARSIZE; -#endif - d->command = command; - d->invoke = invoke_rmdir; - d->free = free_data; - d->level = 2; - goto done; - } - case FILE_DELETE: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + FILENAME_BYTELEN(name) + FILENAME_CHARSIZE); - - FILENAME_COPY(d->b, name); -#ifdef USE_VM_PROBES - dt_s1 = d->b; - dt_utag = name + FILENAME_BYTELEN(name) + FILENAME_CHARSIZE; -#endif - d->command = command; - d->invoke = invoke_delete_file; - d->free = free_data; - d->level = 2; - goto done; - } - case FILE_RENAME: - { - char* new_name; - int namelen = FILENAME_BYTELEN(name)+FILENAME_CHARSIZE; - new_name = name+namelen; - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 - + namelen - + FILENAME_BYTELEN(new_name) + FILENAME_CHARSIZE); - - FILENAME_COPY(d->b, name); - FILENAME_COPY(d->b + namelen, new_name); -#ifdef USE_VM_PROBES - dt_s1 = d->b; - dt_s2 = d->b + namelen; - dt_utag = buf + namelen + FILENAME_BYTELEN(new_name) + FILENAME_CHARSIZE; -#endif - d->flags = desc->flags; - d->fd = fd; - d->command = command; - d->invoke = invoke_rename; - d->free = free_data; - d->level = 2; - goto done; - } - case FILE_CHDIR: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + FILENAME_BYTELEN(name) + FILENAME_CHARSIZE); - - FILENAME_COPY(d->b, name); -#ifdef USE_VM_PROBES - dt_s1 = d->b; - dt_utag = name + FILENAME_BYTELEN(name) + FILENAME_CHARSIZE; -#endif - d->command = command; - d->invoke = invoke_chdir; - d->free = free_data; - d->level = 2; - goto done; - } - case FILE_PWD: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + RESBUFSIZE + 1); - - d->drive = *(uchar*)buf; -#ifdef USE_VM_PROBES - dt_utag = buf + 1; -#endif - d->command = command; - d->invoke = invoke_pwd; - d->free = free_data; - d->level = 2; - goto done; - } - - case FILE_READDIR: -#ifdef USE_THREADS - if (sys_info.async_threads > 0) - { - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + FILENAME_BYTELEN(name) + - FILENAME_CHARSIZE); - - FILENAME_COPY(d->b, name); -#ifdef USE_VM_PROBES - dt_s1 = d->b; - dt_utag = name + FILENAME_BYTELEN(name) + FILENAME_CHARSIZE; -#endif - d->dir_handle = NULL; - d->command = command; - d->invoke = invoke_readdir; - d->free = free_readdir; - d->level = 2; - d->c.read_dir.first_buf = NULL; - d->c.read_dir.last_buf = NULL; - goto done; - } - else -#endif - { - size_t resbufsize; - size_t n = 0, total = 0; - int res = 0; - char resbuf[READDIR_BUFSIZE]; - - EFILE_DIR_HANDLE dir_handle; /* Handle to open directory. */ - - total = READDIR_BUFSIZE; - errInfo.posix_errno = 0; - dir_handle = NULL; - resbuf[0] = FILE_RESP_LFNAME; - -#ifdef USE_VM_PROBES - dt_s1 = name; - dt_utag = name + FILENAME_BYTELEN(name) + FILENAME_CHARSIZE; -#endif - /* Fill the buffer with multiple directory listings before sending it to the - * receiving process. READDIR_CHUNKS is minimum number of files sent to the - * receiver. - * Format for each driver_output2: - * ------------------------------------ - * | Type | Len | Filename | ... - * | 1 byte | 2 bytes | Len bytes | ... - * ------------------------------------ - */ - - do { - n = 1; - resbufsize = READDIR_BUFSIZE - n; - - do { - res = efile_readdir(&errInfo, name, &dir_handle, resbuf + n + 2, &resbufsize); - - if (res) { - put_int16((Uint16)resbufsize, resbuf + n); - n += 2 + resbufsize; - resbufsize = READDIR_BUFSIZE - n; - } - } while( res && ((total - n - 2) >= MAXPATHLEN*FILENAME_CHARSIZE)); - - if (n > 1) { - driver_output2(desc->port, resbuf, 1, resbuf + 1, n - 1); - } - } while(res); - - if (errInfo.posix_errno != 0) { - reply_error(desc, &errInfo); - return; - } -#ifdef USE_VM_PROBES - if (dt_utag != NULL && dt_utag[0] == '\0') { - dt_utag = NULL; - } - - DTRACE11(efile_drv_entry, dt_priv->thread_num, dt_priv->tag, - dt_utag, command, name, dt_s2, - dt_i1, dt_i2, dt_i3, dt_i4, desc->port_str); - DTRACE6(efile_drv_return, dt_priv->thread_num, dt_priv->tag++, - dt_utag, command, 1, 0); -#endif - TRACE_C('R'); - driver_output2(desc->port, resbuf, 1, NULL, 0); - return; - } - case FILE_OPEN: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + FILENAME_BYTELEN(buf+4) + - FILENAME_CHARSIZE); - - d->flags = get_int32((uchar*)buf); - name = buf+4; - FILENAME_COPY(d->b, name); -#ifdef USE_VM_PROBES - dt_i1 = d->flags; - dt_s1 = d->b; - dt_utag = name + FILENAME_BYTELEN(d->b) + FILENAME_CHARSIZE; -#endif - d->command = command; - d->invoke = invoke_open; - d->free = free_data; - d->level = 2; - d->is_fd_unused = 1; - goto done; - } - - case FILE_FDATASYNC: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data)); - - d->fd = fd; -#ifdef USE_VM_PROBES - dt_utag = name; - dt_i1 = fd; -#endif - d->command = command; - d->invoke = invoke_fdatasync; - d->free = free_data; - d->level = 2; - goto done; - } - - case FILE_FSYNC: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data)); - - d->fd = fd; -#ifdef USE_VM_PROBES - dt_utag = name; - dt_i1 = fd; -#endif - d->command = command; - d->invoke = invoke_fsync; - d->free = free_data; - d->level = 2; - goto done; - } - - - case FILE_FSTAT: - case FILE_LSTAT: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + FILENAME_BYTELEN(name) + - FILENAME_CHARSIZE); - - FILENAME_COPY(d->b, name); - d->fd = fd; -#ifdef USE_VM_PROBES - dt_utag = name + FILENAME_BYTELEN(d->b) + FILENAME_CHARSIZE; - if (command == FILE_LSTAT) { - dt_s1 = d->b; - } else { - dt_i1 = fd; - } -#endif - d->command = command; - d->invoke = invoke_flstat; - d->free = free_data; - d->level = 2; - goto done; - } - - case FILE_TRUNCATE: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data)); - - d->flags = desc->flags; - d->fd = fd; -#ifdef USE_VM_PROBES - dt_utag = name; - dt_i1 = fd; - dt_i2 = d->flags; -#endif - d->command = command; - d->invoke = invoke_truncate; - d->free = free_data; - d->level = 2; - goto done; - } - - case FILE_WRITE_INFO: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 - + FILENAME_BYTELEN(buf + 9*4) + FILENAME_CHARSIZE); - - d->info.mode = get_int32(buf + 0 * 4); - d->info.uid = get_int32(buf + 1 * 4); - d->info.gid = get_int32(buf + 2 * 4); - d->info.accessTime = get_int64(buf + 3 * 4); - d->info.modifyTime = get_int64(buf + 5 * 4); - d->info.cTime = get_int64(buf + 7 * 4); - - FILENAME_COPY(d->b, buf + 9*4); -#ifdef USE_VM_PROBES - dt_i1 = d->info.mode; - dt_i2 = d->info.uid; - dt_i3 = d->info.gid; - dt_s1 = d->b; - dt_utag = buf + 9 * 4 + FILENAME_BYTELEN(d->b) + FILENAME_CHARSIZE; -#endif - d->command = command; - d->invoke = invoke_write_info; - d->free = free_data; - d->level = 2; - goto done; - } - - case FILE_READLINK: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + - MAX(RESBUFSIZE, (FILENAME_BYTELEN(name) + - FILENAME_CHARSIZE)) + 1); - FILENAME_COPY(d->b, name); -#ifdef USE_VM_PROBES - dt_s1 = d->b; - dt_utag = name + FILENAME_BYTELEN(d->b) + FILENAME_CHARSIZE; -#endif - d->command = command; - d->invoke = invoke_readlink; - d->free = free_data; - d->level = 2; - goto done; - } - - case FILE_ALTNAME: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + - MAX(RESBUFSIZE, (FILENAME_BYTELEN(name) + - FILENAME_CHARSIZE)) + 1); - FILENAME_COPY(d->b, name); -#ifdef USE_VM_PROBES - dt_s1 = d->b; - dt_utag = name + FILENAME_BYTELEN(d->b) + FILENAME_CHARSIZE; -#endif - d->command = command; - d->invoke = invoke_altname; - d->free = free_data; - d->level = 2; - goto done; - } - - - case FILE_LINK: - { - char* new_name; - int namelen = FILENAME_BYTELEN(name) + FILENAME_CHARSIZE; - - new_name = name+namelen; - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 - + namelen - + FILENAME_BYTELEN(new_name) + FILENAME_CHARSIZE); - - FILENAME_COPY(d->b, name); - FILENAME_COPY(d->b + namelen, new_name); -#ifdef USE_VM_PROBES - dt_s1 = d->b; - dt_s2 = d->b + namelen; - dt_utag = buf + namelen + FILENAME_BYTELEN(dt_s2) + FILENAME_CHARSIZE; -#endif - d->flags = desc->flags; - d->fd = fd; - d->command = command; - d->invoke = invoke_link; - d->free = free_data; - d->level = 2; - goto done; - } - - case FILE_SYMLINK: - { - char* new_name; - int namelen = FILENAME_BYTELEN(name) + FILENAME_CHARSIZE; - - new_name = name+namelen; - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 - + namelen - + FILENAME_BYTELEN(new_name) + FILENAME_CHARSIZE); - - FILENAME_COPY(d->b, name); - FILENAME_COPY(d->b + namelen, new_name); -#ifdef USE_VM_PROBES - dt_s1 = d->b; - dt_s2 = d->b + namelen; - dt_utag = buf + namelen + FILENAME_BYTELEN(dt_s2) + FILENAME_CHARSIZE; -#endif - d->flags = desc->flags; - d->fd = fd; - d->command = command; - d->invoke = invoke_symlink; - d->free = free_data; - d->level = 2; - goto done; - } - - case FILE_FADVISE: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data)); - - d->fd = fd; - d->command = command; - d->invoke = invoke_fadvise; - d->free = free_data; - d->level = 2; - d->c.fadvise.offset = get_int64((uchar*) buf); - d->c.fadvise.length = get_int64(((uchar*) buf) + sizeof(Sint64)); - d->c.fadvise.advise = get_int32(((uchar*) buf) + 2 * sizeof(Sint64)); -#ifdef USE_VM_PROBES - dt_i1 = d->fd; - dt_i2 = d->c.fadvise.offset; - dt_i3 = d->c.fadvise.length; - dt_i4 = d->c.fadvise.advise; - dt_utag = buf + 3 * sizeof(Sint64); -#endif - goto done; - } - - case FILE_FALLOCATE: - { - d = EF_SAFE_ALLOC(sizeof(struct t_data)); - - d->fd = fd; - d->command = command; - d->invoke = invoke_fallocate; - d->free = free_data; - d->level = 2; - d->c.fallocate.offset = get_int64((uchar*) buf); - d->c.fallocate.length = get_int64(((uchar*) buf) + sizeof(Sint64)); - goto done; - } - - } - - /* - * Ignore anything else -- let the caller hang. - */ - - return; - - done: - if (d) { -#ifdef USE_VM_PROBES - d->sched_i1 = dt_priv->thread_num; - d->sched_i2 = dt_priv->tag; - d->sched_utag[0] = '\0'; - if (dt_utag != NULL) { - if (dt_utag[0] == '\0') { - dt_utag = NULL; - } else { - strncpy(d->sched_utag, dt_utag, sizeof(d->sched_utag) - 1); - d->sched_utag[sizeof(d->sched_utag) - 1] = '\0'; - } - } - DTRACE11(efile_drv_entry, dt_priv->thread_num, dt_priv->tag++, - dt_utag, command, dt_s1, dt_s2, - dt_i1, dt_i2, dt_i3, dt_i4, desc->port_str); -#endif - cq_enq(desc, d); - } -} - -/********************************************************************* - * Driver entry point -> flush - */ -static void -file_flush(ErlDrvData e) { - file_descriptor *desc = (file_descriptor *)e; -#ifdef DEBUG - int r; -#endif -#ifdef USE_VM_PROBES - dt_private *dt_priv = get_dt_private(dt_driver_io_worker_base); -#endif - - TRACE_C('f'); - -#ifdef HAVE_SENDFILE - flush_sendfile(desc, NULL); -#endif - -#ifdef DEBUG - r = -#endif - flush_write(desc, NULL -#ifdef USE_VM_PROBES - , dt_priv, (desc->d == NULL) ? NULL : desc->d->sched_utag -#endif - ); - /* Only possible reason for bad return value is ENOMEM, and - * there is nobody to tell... - */ -#ifdef DEBUG - ASSERT(r == 0); -#endif - cq_execute(desc); -} - - - -/********************************************************************* - * Driver entry point -> control - * Only debug functionality... - */ -static ErlDrvSSizeT -file_control(ErlDrvData e, unsigned int command, - char* buf, ErlDrvSizeT len, char **rbuf, ErlDrvSizeT rlen) { - file_descriptor *desc = (file_descriptor *)e; - switch (command) { - case 'K' : - if (rlen < 4) { - *rbuf = EF_ALLOC(4); - } - (*rbuf)[0] = ((desc->key) >> 24) & 0xFF; - (*rbuf)[1] = ((desc->key) >> 16) & 0xFF; - (*rbuf)[2] = ((desc->key) >> 8) & 0xFF; - (*rbuf)[3] = (desc->key) & 0xFF; - return 4; - default: - return 0; - } -} - -/********************************************************************* - * Driver entry point -> timeout - */ -static void -file_timeout(ErlDrvData e) { - file_descriptor *desc = (file_descriptor *)e; - enum e_timer timer_state = desc->timer_state; -#ifdef USE_VM_PROBES - dt_private *dt_priv = get_dt_private(dt_driver_io_worker_base); -#endif - - TRACE_C('t'); - - desc->timer_state = timer_idle; - switch (timer_state) { - case timer_idle: - ASSERT(0); - break; - case timer_again: - ASSERT(desc->invoke); - ASSERT(desc->free); - driver_async(desc->port, KEY(desc), desc->invoke, desc->d, desc->free); - break; - case timer_write: { -#ifdef DEBUG - int r = -#endif - flush_write(desc, NULL -#ifdef USE_VM_PROBES - , dt_priv, (desc->d == NULL) ? NULL : desc->d->sched_utag -#endif - ); - /* Only possible reason for bad return value is ENOMEM, and - * there is nobody to tell... - */ - ASSERT(r == 0); - cq_execute(desc); - } break; - } /* case */ -} - - - -/********************************************************************* - * Driver entry point -> outputv - */ -static void -file_outputv(ErlDrvData e, ErlIOVec *ev) { - file_descriptor* desc = (file_descriptor*)e; - char command; - size_t p, q; - int err; - struct t_data *d = NULL; -#ifdef USE_VM_PROBES - Sint64 dt_i1 = 0, dt_i2 = 0, dt_i3 = 0; - Sint64 dt_i4 = 0; - char *dt_utag = NULL; - char *dt_s1 = NULL; - dt_private *dt_priv = get_dt_private(dt_driver_io_worker_base); -#endif - - TRACE_C('v'); - - p = 0; q = 1; - if (! EV_GET_CHAR(ev, &command, &p, &q)) { - /* Empty command */ - reply_posix_error(desc, EINVAL); - goto done; - } - /* 'command' contains the decoded command number, - * 'p' and 'q' point out the next byte in the command: - * ((char *)ev->iov[q].iov_base) + p; - */ - - TRACE_F(("%i", (int) command)); - - switch (command) { - - case FILE_CLOSE: { -#ifdef USE_VM_PROBES - dt_utag = EV_CHAR_P(ev, p, q); -#endif - flush_read(desc); - if (flush_write_check_error(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_posix_error(desc, err); - goto done; - } - if (desc->fd != FILE_FD_INVALID) { - if (! (d = EF_ALLOC(sizeof(struct t_data)))) { - reply_posix_error(desc, ENOMEM); - } else { - d->command = command; - d->reply = !0; - d->fd = desc->fd; - d->flags = desc->flags; -#ifdef USE_VM_PROBES - dt_i1 = d->fd; - dt_i2 = d->flags; -#endif - d->invoke = invoke_close; - d->free = free_data; - d->level = 2; - cq_enq(desc, d); - desc->fd = FILE_FD_INVALID; - desc->flags = 0; - } - } else { - reply_posix_error(desc, EBADF); - } - } goto done; - - case FILE_READ: { - Uint32 sizeH, sizeL; - size_t size, alloc_size; - - if (!EV_GET_UINT32(ev, &sizeH, &p, &q) - || !EV_GET_UINT32(ev, &sizeL, &p, &q)) { - /* Wrong buffer length to contain the read count */ - reply_posix_error(desc, EINVAL); - goto done; - } -#ifdef USE_VM_PROBES - dt_utag = EV_CHAR_P(ev, p, q); -#endif - if (flush_write_check_error(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_posix_error(desc, err); - goto done; - } -#if ALWAYS_READ_LINE_AHEAD - if (desc->read_bufsize == 0 && desc->read_binp != NULL && desc->read_size > 0) { - /* We have allocated a buffer for line mode but should not really have a - read-ahead buffer... */ - if (lseek_flush_read(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_posix_error(desc, err); - goto done; - } - } -#endif -#if SIZEOF_SIZE_T == 4 - if (sizeH != 0) { - reply_posix_error(desc, EINVAL); - goto done; - } - size = sizeL; -#else - size = ((size_t)sizeH << 32) | sizeL; -#endif - if ((desc->fd == FILE_FD_INVALID) - || (! (desc->flags & EFILE_MODE_READ)) ) { - reply_posix_error(desc, EBADF); - goto done; - } - if (size == 0) { - reply_buf(desc, &command, 0); - goto done; - } - if (desc->read_size >= size) { - /* We already have all data */ - TRACE_C('D'); - reply_data(desc, desc->read_binp, desc->read_offset, size); - desc->read_offset += size; - desc->read_size -= size; - try_free_read_bin(desc); - goto done; - } - /* We may have some of the data - */ - /* Justification for the following strange formula: - * If the read request is for such a large block as more than - * half the buffer size it may lead to a lot of unnecessary copying, - * since the tail of the old buffer is copied to the head of the - * new, and if the tail is almost half the buffer it is a lot - * to copy. Therefore allocate the exact amount needed in - * this case, giving no lingering tail. */ - alloc_size = - size > (desc->read_bufsize>>1) ? - size : desc->read_bufsize; - if (! desc->read_binp) { - /* Need to allocate a new binary for the result */ - if (! (desc->read_binp = driver_alloc_binary(alloc_size))) { - reply_posix_error(desc, ENOMEM); - goto done; - } - } else { - /* We already have a buffer */ - if (desc->read_binp->orig_size - desc->read_offset < size) { - /* Need to allocate a new binary for the result */ - ErlDrvBinary *binp; - if (! (binp = driver_alloc_binary(alloc_size))) { - reply_posix_error(desc, ENOMEM); - goto done; - } - /* Move data we already have to the new binary */ - sys_memcpy(binp->orig_bytes, - desc->read_binp->orig_bytes + desc->read_offset, - desc->read_size); - driver_free_binary(desc->read_binp); - desc->read_offset = 0; - desc->read_binp = binp; - } - } - if (! (d = EF_ALLOC(sizeof(struct t_data)))) { - reply_posix_error(desc, ENOMEM); - goto done; - } - d->command = command; - d->reply = !0; - d->fd = desc->fd; - d->flags = desc->flags; - d->c.read.binp = desc->read_binp; - d->c.read.bin_offset = desc->read_offset + desc->read_size; - d->c.read.bin_size = desc->read_binp->orig_size - d->c.read.bin_offset; - d->c.read.size = size; -#ifdef USE_VM_PROBES - dt_i1 = d->fd; - dt_i2 = d->flags; - dt_i3 = d->c.read.size; -#endif - driver_binary_inc_refc(d->c.read.binp); - d->invoke = invoke_read; - d->free = free_read; - d->level = 1; - cq_enq(desc, d); - } goto done; /* case FILE_READ: */ - - case FILE_READ_LINE: { - /* - * Icky little creature... We do mostly as ordinary file read, but with a few differences. - * 1) We have to scan for proper newline sequence if there is a buffer already, we cannot know - * in advance if the buffer contains a whole line without scanning. - * 2) We do not know how large the buffer needs to be in advance. We give a default buffer, - * but the worker may need to allocate a new one. Freeing the old and rereferencing a newly - * allocated binary + dealing with offsets and lengts are done in file_async ready - * for this OP. - */ -#ifdef USE_VM_PROBES - dt_utag = EV_CHAR_P(ev, p, q); -#endif - if (flush_write_check_error(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_posix_error(desc, err); - goto done; - } - if (ev->size != 1 -#ifdef USE_VM_PROBES - + FILENAME_BYTELEN(dt_utag) + FILENAME_CHARSIZE -#endif - ) { - /* Wrong command length */ - reply_posix_error(desc, EINVAL); - goto done; - } - if ((desc->fd == FILE_FD_INVALID) - || (! (desc->flags & EFILE_MODE_READ)) ) { - reply_posix_error(desc, EBADF); - goto done; - } - if (desc->read_size > 0) { - /* look for '\n' in what we'we already got */ - void *nl_ptr = memchr(desc->read_binp->orig_bytes + desc->read_offset,'\n',desc->read_size); - if (nl_ptr != NULL) { - /* If found, we're done */ - int skip = 0; - size_t size = ((char *) nl_ptr) - - ((char *) (desc->read_binp->orig_bytes + desc->read_offset)) + 1; - if (size > 1 && - *(((char *) nl_ptr) - 1) == '\r') { - *(((char *) nl_ptr) - 1) = '\n'; - skip = 1; - --size; - } - reply_data(desc, desc->read_binp, desc->read_offset, size); - desc->read_offset += (size + skip); - desc->read_size -= (size + skip); - try_free_read_bin(desc); - goto done; - } - } - /* Now, it's up to the thread to work out the need for more buffers and such, it's - no use doing it in this thread as we do not have the information required anyway. - Even a NULL buffer could be handled by the thread, but code is simplified by us - allocating it */ - if (! desc->read_binp) { - int alloc_size = (desc->read_bufsize > DEFAULT_LINEBUF_SIZE) ? desc->read_bufsize : - DEFAULT_LINEBUF_SIZE; - /* Allocate a new binary for the result */ - if (! (desc->read_binp = driver_alloc_binary(alloc_size))) { - reply_posix_error(desc, ENOMEM); - goto done; - } - } - if (! (d = EF_ALLOC(sizeof(struct t_data)))) { - reply_posix_error(desc, ENOMEM); - goto done; - } - - d->command = command; - d->reply = !0; - d->fd = desc->fd; - d->flags = desc->flags; - d->c.read_line.binp = desc->read_binp; - d->c.read_line.read_offset = desc->read_offset; - d->c.read_line.read_size = desc->read_size; -#ifdef USE_VM_PROBES - dt_i1 = d->fd; - dt_i2 = d->flags; - dt_i3 = d->c.read_line.read_offset; -#endif -#if !ALWAYS_READ_LINE_AHEAD - d->c.read_line.read_ahead = (desc->read_bufsize > 0); -#ifdef USE_VM_PROBES - dt_i4 = d->c.read_line.read_ahead; -#endif -#endif - driver_binary_inc_refc(d->c.read.binp); - d->invoke = invoke_read_line; - d->free = free_read_line; - d->level = 1; - cq_enq(desc, d); - } goto done; - case FILE_WRITE: { /* Dtrace: The dtrace user tag is not last in message, - but follows the message tag directly. - This is handled specially in prim_file.erl */ - ErlDrvSizeT skip = 1; - ErlDrvSizeT size = ev->size - skip; - -#ifdef USE_VM_PROBES - dt_utag = EV_CHAR_P(ev, p, q); - skip += FILENAME_BYTELEN(dt_utag) + FILENAME_CHARSIZE; - size = ev->size - skip; -#endif - if (lseek_flush_read(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_posix_error(desc, err); - goto done; - } - if (! (desc->flags & EFILE_MODE_WRITE)) { - reply_posix_error(desc, EBADF); - goto done; - } - if (size == 0) { - reply_Uint(desc, size); - goto done; - } - MUTEX_LOCK(desc->q_mtx); - if (driver_enqv(desc->port, ev, skip)) { - MUTEX_UNLOCK(desc->q_mtx); - reply_posix_error(desc, ENOMEM); - goto done; - } - desc->write_buffered += size; - if (desc->write_buffered < desc->write_bufsize) { - MUTEX_UNLOCK(desc->q_mtx); - reply_Uint(desc, size); - if (desc->timer_state == timer_idle) { - desc->timer_state = timer_write; - driver_set_timer(desc->port, desc->write_delay); - } - } else { - if ((d = async_write(desc, &err, !0, size -#ifdef USE_VM_PROBES - , &dt_i1, &dt_i2, &dt_i3 -#endif - )) == NULL) { - MUTEX_UNLOCK(desc->q_mtx); - reply_posix_error(desc, err); - goto done; - } else { - MUTEX_UNLOCK(desc->q_mtx); - } - } - } goto done; /* case FILE_WRITE */ - - case FILE_PWRITEV: { /* Dtrace: The dtrace user tag is not last in message, - but follows the message tag directly. - This is handled specially in prim_file.erl */ - Uint32 i, j, n; - size_t total; -#ifdef USE_VM_PROBES - char dt_tmp; - int dt_utag_bytes = 1; - - dt_utag = EV_CHAR_P(ev, p, q); - /* This will work for UTF-8, but not for UTF-16 - extra reminder here */ -#ifdef FILENAMES_16BIT -#error 16bit characters in filenames and dtrace in combination is not supported. -#endif - while (EV_GET_CHAR(ev, &dt_tmp, &p, &q) && dt_tmp != '\0') { - dt_utag_bytes++; - } -#endif - if (ev->size < 1+4 -#ifdef USE_VM_PROBES - + dt_utag_bytes -#endif - || !EV_GET_UINT32(ev, &n, &p, &q)) { - /* Buffer too short to contain even the number of pos/size specs */ - reply_Uint_posix_error(desc, 0, EINVAL); - goto done; - } - if (lseek_flush_read(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_Uint_posix_error(desc, 0, err); - goto done; - } - if (flush_write_check_error(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_Uint_posix_error(desc, 0, err); - goto done; - } - if (n == 0) { - /* Trivial case - nothing to write */ - if (ev->size != 1+4) { - reply_posix_error(desc, err); - } else { - reply_Uint(desc, 0); - } - goto done; - } - if (ev->size < 1+4+8*(2*n) -#ifdef USE_VM_PROBES - + dt_utag_bytes -#endif - ) { - /* Buffer too short to contain even the pos/size specs */ - reply_Uint_posix_error(desc, 0, EINVAL); - goto done; - } - d = EF_ALLOC(sizeof(struct t_data) - + (n * sizeof(struct t_pbuf_spec))); - if (! d) { - reply_Uint_posix_error(desc, 0, ENOMEM); - goto done; - } - d->command = command; - d->reply = !0; - d->fd = desc->fd; - d->flags = desc->flags; -#ifdef USE_VM_PROBES - dt_i1 = d->fd; - dt_i2 = d->flags; -#endif - d->c.pwritev.port = desc->port; - d->c.pwritev.q_mtx = desc->q_mtx; - d->c.pwritev.n = n; - d->c.pwritev.cnt = 0; - total = 0; - j = 0; - /* Create pos/size specs in the thread data structure - * for all non-zero size binaries. Calculate total size. - */ - for(i = 0; i < n; i++) { - Uint32 sizeH, sizeL; - size_t size; - if ( !EV_GET_SINT64(ev, &d->c.pwritev.specs[i].offset, &p, &q) - || !EV_GET_UINT32(ev, &sizeH, &p, &q) - || !EV_GET_UINT32(ev, &sizeL, &p, &q)) { - /* Misalignment in buffer */ - reply_Uint_posix_error(desc, 0, EINVAL); - EF_FREE(d); - goto done; - } -#if SIZEOF_SIZE_T == 4 - if (sizeH != 0) { - reply_Uint_posix_error(desc, 0, EINVAL); - EF_FREE(d); - goto done; - } - size = sizeL; -#else - size = ((size_t)sizeH<<32) | sizeL; -#endif - if (size > 0) { - total += size; - d->c.pwritev.specs[j].size = size; - j++; - } - } - d->c.pwritev.size = total; -#ifdef USE_VM_PROBES - dt_i3 = d->c.pwritev.size; -#endif - if (j == 0) { - /* Trivial case - nothing to write */ - EF_FREE(d); - reply_Uint(desc, 0); - } else { - ErlDrvSizeT skip = 1 + 4 + 8 * (2*n) -#ifdef USE_VM_PROBES - + dt_utag_bytes -#endif - ; - if (skip + total != ev->size) { - /* Actual amount of data does not match - * total of all pos/size specs - */ - EF_FREE(d); - reply_Uint_posix_error(desc, 0, EINVAL); - } else { - /* Enqueue the data */ - MUTEX_LOCK(desc->q_mtx); - driver_enqv(desc->port, ev, skip); - MUTEX_UNLOCK(desc->q_mtx); - /* Execute the command */ - d->invoke = invoke_pwritev; - d->free = free_data; - d->level = 1; - cq_enq(desc, d); - } - } - } goto done; /* case FILE_PWRITEV: */ - - case FILE_PREADV: { /* Dtrace: The dtrace user tag is not last in message, - but follows the message tag directly. - This is handled specially in prim_file.erl */ - register void * void_ptr; - Uint32 i, n; - ErlIOVec *res_ev; -#ifdef USE_VM_PROBES - char dt_tmp; - int dt_utag_bytes = 1; - /* This will work for UTF-8, but not for UTF-16 - extra reminder here */ -#ifdef FILENAMES_16BIT -#error 16bit characters in filenames and dtrace in combination is not supported. -#endif - dt_utag = EV_CHAR_P(ev, p, q); - while (EV_GET_CHAR(ev, &dt_tmp, &p, &q) && dt_tmp != '\0') { - dt_utag_bytes++; - } -#endif - if (lseek_flush_read(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_posix_error(desc, err); - goto done; - } - if (flush_write_check_error(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_posix_error(desc, err); - goto done; - } - if (ev->size < 1+8 -#ifdef USE_VM_PROBES - + dt_utag_bytes -#endif - || !EV_GET_UINT32(ev, &n, &p, &q) - || !EV_GET_UINT32(ev, &n, &p, &q)) { - /* Buffer too short to contain even the number of pos/size specs */ - reply_posix_error(desc, EINVAL); - goto done; - } - if (ev->size < 1+8+8*(2*n) -#ifdef USE_VM_PROBES - + dt_utag_bytes -#endif - ) { - /* Buffer wrong length to contain the pos/size specs */ - reply_posix_error(desc, EINVAL); - goto done; - } - /* Create the thread data structure with the contained ErlIOVec - * and corresponding binaries for the response - */ - d = EF_ALLOC(sizeof(*d) - + (n * sizeof(*d->c.preadv.offsets)) - + ((1+n) * (sizeof(*res_ev->iov) - + sizeof(*res_ev->binv)))); - if (! d) { - reply_posix_error(desc, ENOMEM); - goto done; - } - d->command = command; - d->reply = !0; - d->fd = desc->fd; - d->flags = desc->flags; -#ifdef USE_VM_PROBES - dt_i1 = d->fd; - dt_i2 = d->flags; -#endif - d->c.preadv.n = n; - d->c.preadv.cnt = 0; - d->c.preadv.size = 0; - res_ev = &d->c.preadv.eiov; - /* XXX possible alignment problems here for weird machines */ - res_ev->vsize = 1+d->c.preadv.n; - res_ev->iov = void_ptr = &d->c.preadv.offsets[d->c.preadv.n]; - res_ev->binv = void_ptr = &res_ev->iov[res_ev->vsize]; - /* Read in the pos/size specs and allocate binaries for the results */ - for (i = 1; i < 1+n; i++) { - Uint32 sizeH, sizeL; - size_t size; - if ( !EV_GET_SINT64(ev, &d->c.preadv.offsets[i-1], &p, &q) - || !EV_GET_UINT32(ev, &sizeH, &p, &q) - || !EV_GET_UINT32(ev, &sizeL, &p, &q)) { - reply_posix_error(desc, EINVAL); - break; - } -#if SIZEOF_SIZE_T == 4 - if (sizeH != 0) { - reply_posix_error(desc, EINVAL); - break; - } - size = sizeL; -#else - size = ((size_t)sizeH<<32) | sizeL; -#endif -#ifdef USE_VM_PROBES - dt_i3 += size; -#endif - if (! (res_ev->binv[i] = driver_alloc_binary(size))) { - reply_posix_error(desc, ENOMEM); - break; - } else { - res_ev->iov[i].iov_len = size; - res_ev->iov[i].iov_base = res_ev->binv[i]->orig_bytes; - } - } - if (i < 1+n) { - for (i--; i > 0; i--) { - driver_free_binary(res_ev->binv[i]); - } - EF_FREE(d); - goto done; - } - /* Allocate the header binary (index 0) */ - res_ev->binv[0] = driver_alloc_binary(4+4+8*n); - if (! res_ev->binv[0]) { - reply_posix_error(desc, ENOMEM); - for (i = 1; i < 1+n; i++) { - driver_free_binary(res_ev->binv[i]); - } - EF_FREE(d); - goto done; - } - res_ev->iov[0].iov_len = 4+4+8*n; - res_ev->iov[0].iov_base = res_ev->binv[0]->orig_bytes; - /* Fill in the number of buffers in the header */ - put_int32(0, res_ev->iov[0].iov_base); - put_int32(n, (char *)(res_ev->iov[0].iov_base) + 4); - /**/ - res_ev->size = res_ev->iov[0].iov_len; - if (n == 0) { - /* Trivial case - nothing to read */ - reply_ev(desc, FILE_RESP_LDATA, res_ev); - free_preadv(d); - goto done; - } else { - d->invoke = invoke_preadv; - d->free = free_preadv; - d->level = 1; - cq_enq(desc, d); - } - } goto done; /* case FILE_PREADV: */ - - case FILE_LSEEK: { - Sint64 offset; /* Offset for seek */ - Uint32 origin; /* Origin of seek. */ - - if (ev->size < 1+8+4 - || !EV_GET_SINT64(ev, &offset, &p, &q) - || !EV_GET_UINT32(ev, &origin, &p, &q)) { - /* Wrong length of buffer to contain offset and origin */ - reply_posix_error(desc, EINVAL); - goto done; - } -#ifdef USE_VM_PROBES - dt_utag = EV_CHAR_P(ev, p, q); -#endif - if (lseek_flush_read(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_posix_error(desc, err); - goto done; - } - if (flush_write_check_error(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_posix_error(desc, err); - goto done; - } - if ((d = async_lseek(desc, &err, !0, offset, origin -#ifdef USE_VM_PROBES - , &dt_i1, &dt_i2, &dt_i3 -#endif - )) == NULL) { - reply_posix_error(desc, err); - goto done; - } - } goto done; - - case FILE_READ_FILE: { - char *filename; - if (ev->size < 1+1) { - /* Buffer contains empty name */ - reply_posix_error(desc, ENOENT); - goto done; - } -#ifndef USE_VM_PROBES - /* In the dtrace case, the iov has an extra element, the dtrace utag - we will need - another test to see that - the filename is in a single buffer: */ - if (ev->size-1 != ev->iov[q].iov_len-p) { - /* Name not in one single buffer */ - reply_posix_error(desc, EINVAL); - goto done; - } -#else - if (((byte *)ev->iov[q].iov_base)[ev->iov[q].iov_len-1] != '\0') { - /* Name not in one single buffer */ - reply_posix_error(desc, EINVAL); - goto done; - } -#endif - filename = EV_CHAR_P(ev, p, q); - d = EF_ALLOC(sizeof(struct t_data) -1 + FILENAME_BYTELEN(filename) + FILENAME_CHARSIZE); - if (! d) { - reply_posix_error(desc, ENOMEM); - goto done; - } - d->command = command; - d->reply = !0; - /* Copy name */ - FILENAME_COPY(d->b, filename); -#ifdef USE_VM_PROBES - { - char dt_tmp; - - /* This will work for UTF-8, but not for UTF-16 - extra reminder here */ -#ifdef FILENAMES_16BIT -#error 16bit characters in filenames and dtrace in combination is not supported. -#endif - while (EV_GET_CHAR(ev, &dt_tmp, &p, &q) && dt_tmp != '\0') - ; - dt_s1 = d->b; - dt_utag = EV_CHAR_P(ev, p, q); - } -#endif - d->c.read_file.binp = NULL; - d->invoke = invoke_read_file; - d->free = free_read_file; - d->level = 2; - cq_enq(desc, d); - } goto done; - - case FILE_IPREAD: { - /* This operation cheets by using invoke_preadv() and free_preadv() - * plus its own invoke_ipread. Therefore the result format is - * a bit awkward - the header binary contains one extra 64 bit - * field that invoke_preadv() fortunately ignores, - * and the first 64 bit field does not contain the number of - * data binaries which invoke_preadv() also ignores. - */ - register void * void_ptr; - char mode; - Sint64 hdr_offset; - Uint32 max_size; - ErlIOVec *res_ev; - int vsize; - if (! EV_GET_CHAR(ev, &mode, &p, &q)) { - /* Empty command */ - reply_posix_error(desc, EINVAL); - goto done; - } - if (mode != IPREAD_S32BU_P32BU) { - reply_posix_error(desc, EINVAL); - goto done; - } - if (ev->size < 1+1+8+4 - || !EV_GET_SINT64(ev, &hdr_offset, &p, &q) - || !EV_GET_UINT32(ev, &max_size, &p, &q)) { - /* Buffer too short to contain - * the header offset and max size spec */ - reply_posix_error(desc, EINVAL); - goto done; - } -#ifdef USE_VM_PROBES - dt_utag = EV_CHAR_P(ev, p, q); -#endif - if (lseek_flush_read(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_posix_error(desc, err); - goto done; - } - if (flush_write_check_error(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_posix_error(desc, err); - goto done; - } - /* Create the thread data structure with the contained ErlIOVec - * and corresponding binaries for the response - */ - vsize = 2; - d = EF_ALLOC(sizeof(*d) + - vsize*(sizeof(*res_ev->iov) + sizeof(*res_ev->binv))); - if (! d) { - reply_posix_error(desc, ENOMEM); - goto done; - } - d->command = command; - d->reply = !0; - d->fd = desc->fd; - d->flags = desc->flags; - d->c.preadv.offsets[0] = hdr_offset; - d->c.preadv.size = max_size; -#ifdef USE_VM_PROBES - dt_i1 = d->fd; - dt_i2 = d->flags; - dt_i3 = d->c.preadv.offsets[0]; - dt_i4 = d->c.preadv.size; -#endif - res_ev = &d->c.preadv.eiov; - /* XXX possible alignment problems here for weird machines */ - res_ev->iov = void_ptr = d + 1; - res_ev->binv = void_ptr = res_ev->iov + vsize; - res_ev->size = 0; - res_ev->vsize = 0; - d->invoke = invoke_ipread; - d->free = free_preadv; - d->level = 1; - cq_enq(desc, d); - } goto done; /* case FILE_IPREAD: */ - - case FILE_SETOPT: { - char opt; - - if (ev->size < 1+1 - || !EV_GET_CHAR(ev, &opt, &p, &q)) { - /* Buffer too short to contain even the option type */ - reply_posix_error(desc, EINVAL); - goto done; - } -#ifdef USE_VM_PROBES - dt_i1 = opt; - dt_utag = EV_CHAR_P(ev, p, q); -#endif - switch (opt) { - case FILE_OPT_DELAYED_WRITE: { - Uint32 sizeH, sizeL, delayH, delayL; - if (ev->size != 1+1+4*sizeof(Uint32) -#ifdef USE_VM_PROBES - + FILENAME_BYTELEN(dt_utag) + FILENAME_CHARSIZE -#endif - || !EV_GET_UINT32(ev, &sizeH, &p, &q) - || !EV_GET_UINT32(ev, &sizeL, &p, &q) - || !EV_GET_UINT32(ev, &delayH, &p, &q) - || !EV_GET_UINT32(ev, &delayL, &p, &q)) { - /* Buffer has wrong length to contain the option values */ - reply_posix_error(desc, EINVAL); - goto done; - } -#if SIZEOF_SIZE_T == 4 - if (sizeH != 0) { - reply_posix_error(desc, EINVAL); - goto done; - } - desc->write_bufsize = sizeL; -#else - desc->write_bufsize = ((size_t)sizeH << 32) | sizeL; -#endif -#if SIZEOF_LONG == 4 - if (delayH != 0) { - reply_posix_error(desc, EINVAL); - goto done; - } - desc->write_delay = delayL; -#else - desc->write_delay = ((unsigned long)delayH << 32) | delayL; -#endif -#ifdef USE_VM_PROBES - dt_i2 = desc->write_delay; -#endif - TRACE_C('K'); - reply_ok(desc); - } goto done; - case FILE_OPT_READ_AHEAD: { - Uint32 sizeH, sizeL; - if (ev->size != 1+1+2*sizeof(Uint32) -#ifdef USE_VM_PROBES - + FILENAME_BYTELEN(dt_utag)+FILENAME_CHARSIZE -#endif - || !EV_GET_UINT32(ev, &sizeH, &p, &q) - || !EV_GET_UINT32(ev, &sizeL, &p, &q)) { - /* Buffer has wrong length to contain the option values */ - reply_posix_error(desc, EINVAL); - goto done; - } -#if SIZEOF_SIZE_T == 4 - if (sizeH != 0) { - reply_posix_error(desc, EINVAL); - goto done; - } - desc->read_bufsize = sizeL; -#else - desc->read_bufsize = ((size_t)sizeH << 32) | sizeL; -#endif -#ifdef USE_VM_PROBES - dt_i2 = desc->read_bufsize; -#endif - TRACE_C('K'); - reply_ok(desc); - } goto done; - default: - reply_posix_error(desc, EINVAL); - goto done; - } /* case FILE_OPT_DELAYED_WRITE: */ - } ASSERT(0); goto done; /* case FILE_SETOPT: */ - - case FILE_SENDFILE: { - -#ifdef HAVE_SENDFILE - struct t_data *d; - Uint32 out_fd, offsetH, offsetL, hd_len, tl_len; - Uint64 nbytes; - char flags; - - if (ev->size < 1 + 7 * sizeof(Uint32) + sizeof(char) - || !EV_GET_UINT32(ev, &out_fd, &p, &q) - || !EV_GET_CHAR(ev, &flags, &p, &q) - || !EV_GET_UINT32(ev, &offsetH, &p, &q) - || !EV_GET_UINT32(ev, &offsetL, &p, &q) - || !EV_GET_UINT64(ev, &nbytes, &p, &q) - || !EV_GET_UINT32(ev, &hd_len, &p, &q) - || !EV_GET_UINT32(ev, &tl_len, &p, &q)) { - /* Buffer has wrong length to contain all the needed values */ - reply_posix_error(desc, EINVAL); - goto done; - } - - if (hd_len != 0 || tl_len != 0) { - /* We do not allow header, trailers */ - reply_posix_error(desc, EINVAL); - goto done; - } - - - if (flags & SENDFILE_FLGS_USE_THREADS && !THRDS_AVAILABLE) { - /* We do not allow use_threads flag on a system where - no threads are available. */ - reply_posix_error(desc, EINVAL); - goto done; - } - - d = EF_SAFE_ALLOC(sizeof(struct t_data)); - d->fd = desc->fd; - d->command = command; - d->invoke = invoke_sendfile; - d->free = free_sendfile; - d->flags = flags; - d->level = 2; - - d->c.sendfile.out_fd = (int) out_fd; - d->c.sendfile.written = 0; - d->c.sendfile.port = desc->port; - d->c.sendfile.q_mtx = desc->q_mtx; - - #if SIZEOF_OFF_T == 4 - if (offsetH != 0) { - reply_posix_error(desc, EINVAL); - goto done; - } - d->c.sendfile.offset = (off_t) offsetL; - #else - d->c.sendfile.offset = ((off_t) offsetH << 32) | offsetL; - #endif - - d->c.sendfile.nbytes = nbytes; - - if (USE_THRDS_FOR_SENDFILE(d)) { - SET_BLOCKING(d->c.sendfile.out_fd); - } else { - /** - * Write a place holder to queue in order to force file_flush - * to be called before the driver is closed. - */ - char tmp[1] = ""; - MUTEX_LOCK(d->c.sendfile.q_mtx); - if (driver_enq(d->c.sendfile.port, tmp, 1)) { - MUTEX_UNLOCK(d->c.sendfile.q_mtx); - reply_posix_error(desc, ENOMEM); - goto done; - } - MUTEX_UNLOCK(d->c.sendfile.q_mtx); - } - - cq_enq(desc, d); -#else - reply_posix_error(desc, ENOTSUP); -#endif - goto done; - } /* case FILE_SENDFILE: */ - - } /* switch(command) */ - - if (lseek_flush_read(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_posix_error(desc, err); - goto done; - } - if (flush_write_check_error(desc, &err -#ifdef USE_VM_PROBES - , dt_priv, dt_utag -#endif - ) < 0) { - reply_posix_error(desc, err); - goto done; - } else { - /* Flatten buffer and send it to file_output(desc, buf, len) */ - int len = ev->size; - char *buf = EF_ALLOC(len); - if (! buf) { - reply_posix_error(desc, ENOMEM); - goto done; - } - driver_vec_to_buf(ev, buf, len); - file_output((ErlDrvData) desc, buf, len); - EF_FREE(buf); - goto done; - } - - done: - if (d != NULL) { -#ifdef USE_VM_PROBES - /* - * If d == NULL, then either: - * 1). There was an error of some sort, or - * 2). The command given to us is actually implemented - * by file_output() instead. - * - * Case #1 is probably a TODO item, perhaps? - * Case #2 we definitely don't want to activate a probe. - */ - d->sched_i1 = dt_priv->thread_num; - d->sched_i2 = dt_priv->tag; - d->sched_utag[0] = '\0'; - if (dt_utag != NULL) { - if (dt_utag[0] == '\0') { - dt_utag = NULL; - } else { - strncpy(d->sched_utag, dt_utag, sizeof(d->sched_utag) - 1); - d->sched_utag[sizeof(d->sched_utag) - 1] = '\0'; - } - } - DTRACE11(efile_drv_entry, dt_priv->thread_num, dt_priv->tag++, - dt_utag, command, dt_s1, NULL, dt_i1, dt_i2, dt_i3, dt_i4, - desc->port_str); -#endif - } - cq_execute(desc); -} - -#ifdef USE_VM_PROBES -dt_private * -get_dt_private(int base) -{ - dt_private *dt_priv = (dt_private *) pthread_getspecific(dt_driver_key); - - if (dt_priv == NULL) { - dt_priv = EF_SAFE_ALLOC(sizeof(dt_private)); - erts_mtx_lock(&dt_driver_mutex); - dt_priv->thread_num = (base + dt_driver_idnum++); - erts_mtx_unlock(&dt_driver_mutex); - dt_priv->tag = 0; - pthread_setspecific(dt_driver_key, dt_priv); - } - return dt_priv; -} -#endif /* USE_VM_PROBES */ diff --git a/erts/emulator/drivers/common/erl_efile.h b/erts/emulator/drivers/common/erl_efile.h deleted file mode 100644 index b7f063b4f2..0000000000 --- a/erts/emulator/drivers/common/erl_efile.h +++ /dev/null @@ -1,176 +0,0 @@ -/* - * %CopyrightBegin% - * - * Copyright Ericsson AB 1997-2016. All Rights Reserved. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - * %CopyrightEnd% - */ -/* - * Defines the interfaces between the generic efile driver and its - * operating-system dependent helpers. - */ - -#include "sys.h" -#include "erl_driver.h" - -/* - * Open modes for efile_openfile(). - */ -#define EFILE_MODE_READ 1 -#define EFILE_MODE_WRITE 2 /* Implies truncating file when used alone. */ -#define EFILE_MODE_READ_WRITE 3 -#define EFILE_MODE_APPEND 4 -#define EFILE_COMPRESSED 8 -#define EFILE_MODE_EXCL 16 -#define EFILE_NO_TRUNCATE 32 /* Special for reopening on VxWorks */ -#define EFILE_MODE_SYNC 64 - -/* - * Seek modes for efile_seek(). - */ -#define EFILE_SEEK_SET 0 -#define EFILE_SEEK_CUR 1 -#define EFILE_SEEK_END 2 - -/* - * File types returned by efile_fileinfo(). - */ -#define FT_DEVICE 1 -#define FT_DIRECTORY 2 -#define FT_REGULAR 3 -#define FT_SYMLINK 4 -#define FT_OTHER 5 - -/* - * Access attributes returned by efile_fileinfo() (the bits can be ORed - * together). - */ -#define FA_NONE 0 -#define FA_WRITE 1 -#define FA_READ 2 - -/* Some OS'es (i.e. Windows) has filenames in wide charaqcters. That requires special handling */ -/* Note that we do *not* honor alignment in the communication to the OS specific driver, */ -/* which is not a problem on x86, but might be on other platforms. The OS specific efile */ -/* implementation is expected to align if needed */ -#ifdef __WIN32__ -#define FILENAMES_16BIT 1 -#endif - -/* We use sendfilev if it exist on solaris */ -#if !defined(HAVE_SENDFILE) && defined(HAVE_SENDFILEV) -#define HAVE_SENDFILE -#endif - -/* - * An handle to an open directory. To be cast to the correct type - * in the system-dependent directory functions. - */ - -typedef struct _Efile_Dir_Handle* EFILE_DIR_HANDLE; - -/* - * Error information from the last call. - */ -typedef struct _Efile_error { - int posix_errno; /* Posix error number, as in <errno.h>. */ - int os_errno; /* Os-dependent error number (not used). */ -} Efile_error; - -/* - * Describes what is returned by file:file_info/1. - */ - -typedef struct _Efile_info { - Uint32 size_low; /* Size of file, lower 32 bits.. */ - Uint32 size_high; /* Size of file, higher 32 bits. */ - Uint32 type; /* Type of file -- one of FT_*. */ - Uint32 access; /* Access to file -- one of FA_*. */ - Uint32 mode; /* Access permissions -- bit field. */ - Uint32 links; /* Number of links to file. */ - Uint32 major_device; /* Major device or file system. */ - Uint32 minor_device; /* Minor device (for devices). */ - Uint32 inode; /* Inode number. */ - Uint32 uid; /* User id of owner. */ - Uint32 gid; /* Group id of owner. */ - Sint64 accessTime; /* Last time the file was accessed. */ - Sint64 modifyTime; /* Last time the file was modified. */ - Sint64 cTime; /* Creation time (Windows) or last - * inode change (Unix). - */ -} Efile_info; - - -#ifdef HAVE_SENDFILE -/* - * Describes the structure of headers/trailers for sendfile - */ -struct t_sendfile_hdtl { - SysIOVec *headers; - int hdr_cnt; - SysIOVec *trailers; - int trl_cnt; -}; -#endif /* HAVE_SENDFILE */ - -/* - * Functions. - */ -int efile_init(void); -int efile_mkdir(Efile_error* errInfo, char* name); -int efile_rmdir(Efile_error* errInfo, char* name); -int efile_delete_file(Efile_error* errInfo, char* name); -int efile_rename(Efile_error* errInfo, char* src, char* dst); -int efile_chdir(Efile_error* errInfo, char* name); -int efile_getdcwd(Efile_error* errInfo, int drive, - char* buffer, size_t size); -int efile_readdir(Efile_error* errInfo, char* name, - EFILE_DIR_HANDLE* dir_handle, - char* buffer, size_t *size); -int efile_openfile(Efile_error* errInfo, char* name, int flags, - int* pfd, Sint64* pSize); -void efile_closefile(int fd); -int efile_fdatasync(Efile_error* errInfo, int fd); -int efile_fsync(Efile_error* errInfo, int fd); -int efile_fileinfo(Efile_error* errInfo, Efile_info* pInfo, - char *name, int info_for_link); -int efile_write_info(Efile_error* errInfo, Efile_info* pInfo, char *name); -int efile_write(Efile_error* errInfo, int flags, int fd, - char* buf, size_t count); -int efile_writev(Efile_error* errInfo, int flags, int fd, - SysIOVec* iov, int iovcnt); -int efile_read(Efile_error* errInfo, int flags, int fd, - char* buf, size_t count, size_t* pBytesRead); -int efile_seek(Efile_error* errInfo, int fd, - Sint64 offset, int origin, Sint64* new_location); -int efile_truncate_file(Efile_error* errInfo, int *fd, int flags); -int efile_pwrite(Efile_error* errInfo, int fd, - char* buf, size_t count, Sint64 offset); -int efile_pread(Efile_error* errInfo, int fd, - Sint64 offset, char* buf, size_t count, size_t* pBytesRead); -int efile_readlink(Efile_error* errInfo, char *name, - char* buffer, size_t size); -int efile_altname(Efile_error* errInfo, char *name, - char* buffer, size_t size); -int efile_link(Efile_error* errInfo, char* old, char* new); -int efile_symlink(Efile_error* errInfo, char* old, char* new); -int efile_may_openfile(Efile_error* errInfo, char *name); -int efile_fadvise(Efile_error* errInfo, int fd, Sint64 offset, Sint64 length, - int advise); -#ifdef HAVE_SENDFILE -int efile_sendfile(Efile_error* errInfo, int in_fd, int out_fd, - off_t *offset, Uint64 *nbytes, struct t_sendfile_hdtl *hdtl); -#endif /* HAVE_SENDFILE */ -int efile_fallocate(Efile_error* errInfo, int fd, Sint64 offset, Sint64 length); diff --git a/erts/emulator/drivers/common/gzio.c b/erts/emulator/drivers/common/gzio.c index f60c781894..86c3b07cea 100644 --- a/erts/emulator/drivers/common/gzio.c +++ b/erts/emulator/drivers/common/gzio.c @@ -19,726 +19,16 @@ #include <unistd.h> #endif #include <ctype.h> + #include "erl_driver.h" -#include "erl_efile.h" #include "sys.h" -#ifdef __WIN32__ -#ifndef HAVE_CONFLICTING_FREAD_DECLARATION -#define HAVE_CONFLICTING_FREAD_DECLARATION -#endif -#define FILENAMES_16BIT 1 -#endif - -#ifdef STDC -# define zstrerror(errnum) strerror(errnum) -#else -# define zstrerror(errnum) "" -#endif - #include "gzio_zutil.h" #include "erl_zlib.h" #include "gzio.h" -/********struct internal_state {int dummy;}; / * for buggy compilers */ - -#define Z_BUFSIZE 4096 - -#define ALLOC(size) driver_alloc(size) -#define TRYFREE(p) {if (p) driver_free(p);} - static int gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */ -/* gzip flag byte */ -#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */ -#define HEAD_CRC 0x02 /* bit 1 set: header CRC present */ -#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */ -#define ORIG_NAME 0x08 /* bit 3 set: original file name present */ -#define COMMENT 0x10 /* bit 4 set: file comment present */ -#define RESERVED 0xE0 /* bits 5..7: reserved */ - -typedef struct gz_stream { - z_stream stream; - int z_err; /* error code for last stream operation */ - int z_eof; /* set if end of input file */ -#ifdef UNIX - int file; /* .gz file descriptor */ -#else - FILE *file; /* .gz file */ -#endif - Byte *inbuf; /* input buffer */ - Byte *outbuf; /* output buffer */ - uLong crc; /* crc32 of uncompressed data */ - char *msg; /* error message */ - char *path; /* path name for debugging only */ - int transparent; /* 1 if input file is not a .gz file */ - char mode; /* 'w' or 'r' */ - int position; /* Position (for seek) */ - int (*destroy)(struct gz_stream*); /* Function to destroy - * this structure. */ -} gz_stream; - -local ErtsGzFile gz_open (const char *path, const char *mode); -local int get_byte (gz_stream *s); -local void check_header (gz_stream *s); -local int destroy (gz_stream *s); -local uLong getLong (gz_stream *s); - -#ifdef UNIX -/* - * In Solaris 8 and earlier, fopen() and its friends cannot handle - * file descriptors larger than 255. Therefore, we use read()/write() - * on all Unix systems. - */ -# define ERTS_GZWRITE(File, Buf, Count) write((File), (Buf), (Count)) -# define ERTS_GZREAD(File, Buf, Count) read((File), (Buf), (Count)) -#else -/* - * On all other operating systems, using fopen(), fread()/fwrite(), since - * there is not guaranteed to exist any read()/write() (not part of - * ANSI/ISO-C). - */ -# define ERTS_GZWRITE(File, Buf, Count) fwrite((Buf), 1, (Count), (File)) -# define ERTS_GZREAD(File, Buf, Count) fread((Buf), 1, (Count), (File)) -#endif - -/* - * Ripped from efile_drv.c - */ - -#ifdef FILENAMES_16BIT -# define FILENAME_BYTELEN(Str) filename_len_16bit(Str) -# define FILENAME_COPY(To,From) filename_cpy_16bit((To),(From)) -# define FILENAME_CHARSIZE 2 - - static int filename_len_16bit(const char *str) - { - const char *p = str; - while(*p != '\0' || p[1] != '\0') { - p += 2; - } - return (p - str); - } - - static void filename_cpy_16bit(char *to, const char *from) - { - while(*from != '\0' || from[1] != '\0') { - *to++ = *from++; - *to++ = *from++; - } - *to++ = *from++; - *to++ = *from++; - } - -#else -# define FILENAME_BYTELEN(Str) strlen(Str) -# define FILENAME_COPY(To,From) strcpy(To,From) -# define FILENAME_CHARSIZE 1 -#endif - -/* =========================================================================== - Opens a gzip (.gz) file for reading or writing. The mode parameter - is as in fopen ("rb" or "wb"). The file is given either by file descriptor - or path name (if fd == -1). - gz_open return NULL if the file could not be opened or if there was - insufficient memory to allocate the (de)compression state; errno - can be checked to distinguish the two cases (if errno is zero, the - zlib error is Z_MEM_ERROR). -*/ -local ErtsGzFile gz_open (path, mode) - const char *path; - const char *mode; -{ - int err; - int level = Z_DEFAULT_COMPRESSION; /* compression level */ - char *p = (char*)mode; - gz_stream *s; - char fmode[80]; /* copy of mode, without the compression level */ - char *m = fmode; - - if (!path || !mode) return Z_NULL; - - s = (gz_stream *)ALLOC(sizeof(gz_stream)); - if (!s) return Z_NULL; - - erl_zlib_alloc_init(&s->stream); - s->stream.next_in = s->inbuf = Z_NULL; - s->stream.next_out = s->outbuf = Z_NULL; - s->stream.avail_in = s->stream.avail_out = 0; -#ifdef UNIX - s->file = -1; -#else - s->file = NULL; -#endif - s->z_err = Z_OK; - s->z_eof = 0; - s->crc = crc32(0L, Z_NULL, 0); - s->msg = NULL; - s->transparent = 0; - s->position = 0; - s->destroy = destroy; - - s->path = (char*)ALLOC(FILENAME_BYTELEN(path)+FILENAME_CHARSIZE); - if (s->path == NULL) { - return s->destroy(s), (ErtsGzFile)Z_NULL; - } - FILENAME_COPY(s->path, path); /* do this early for debugging */ - - s->mode = '\0'; - do { - if (*p == 'r') - s->mode = 'r'; - if (*p == 'w' || *p == 'a') - s->mode = 'w'; - if (isdigit((int)*p)) { - level = *p - '0'; - } else { - *m++ = *p; /* Copy the mode */ - } - } while (*p++ && m < fmode + sizeof(fmode) - 1); - *m = '\0'; - if (s->mode == '\0') - return s->destroy(s), (ErtsGzFile)Z_NULL; - - if (s->mode == 'w') { - err = deflateInit2(&(s->stream), level, - Z_DEFLATED, MAX_WBITS+16, DEF_MEM_LEVEL, 0); - /* windowBits is passed < 0 to suppress zlib header */ - - s->stream.next_out = s->outbuf = (Byte*)ALLOC(Z_BUFSIZE); - - if (err != Z_OK || s->outbuf == Z_NULL) { - return s->destroy(s), (ErtsGzFile)Z_NULL; - } - } else { - /* - * It is tempting to use the built-in support in zlib - * for handling GZIP headers, but unfortunately it - * cannot handle multiple GZIP headers (which occur when - * several GZIP files have been concatenated). - */ - - err = inflateInit2(&(s->stream), -MAX_WBITS); - s->stream.next_in = s->inbuf = (Byte*)ALLOC(Z_BUFSIZE); - - if (err != Z_OK || s->inbuf == Z_NULL) { - return s->destroy(s), (ErtsGzFile)Z_NULL; - } - } - s->stream.avail_out = Z_BUFSIZE; - - errno = 0; -#if defined(FILENAMES_16BIT) - { - FILE* efile_wfopen(const WCHAR* name, const WCHAR* mode); - WCHAR wfmode[80]; - int i = 0; - int j; - for(j = 0; fmode[j] != '\0'; ++j) { - wfmode[i++] = (WCHAR) fmode[j]; - } - wfmode[i++] = L'\0'; - s->file = efile_wfopen((WCHAR *)path, wfmode); - if (s->file == NULL) { - return s->destroy(s), (ErtsGzFile)Z_NULL; - } - } -#elif defined(UNIX) - if (s->mode == 'r') { - s->file = open(path, O_RDONLY); - } else { - s->file = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0666); - } - if (s->file == -1) { - return s->destroy(s), (ErtsGzFile)Z_NULL; - } -#else - s->file = fopen(path, fmode); - if (s->file == NULL) { - return s->destroy(s), (ErtsGzFile)Z_NULL; - } -#endif - if (s->mode == 'r') { - check_header(s); /* skip the .gz header */ - } - return (ErtsGzFile)s; -} - -/* =========================================================================== - Rewind a gzfile back to the beginning. -*/ - -local int gz_rewind (gz_stream *s) -{ - TRYFREE(s->msg); - -#ifdef UNIX - lseek(s->file, 0L, SEEK_SET); -#else - fseek(s->file, 0L, SEEK_SET); -#endif - inflateReset(&(s->stream)); - s->stream.next_in = Z_NULL; - s->stream.next_out = Z_NULL; - s->stream.avail_in = s->stream.avail_out = 0; - s->z_err = Z_OK; - s->z_eof = 0; - s->crc = crc32(0L, Z_NULL, 0); - s->msg = NULL; - s->position = 0; - s->stream.next_in = s->inbuf; - - s->stream.avail_out = Z_BUFSIZE; - - check_header(s); /* skip the .gz header */ - return 1; -} - -/* =========================================================================== - Opens a gzip (.gz) file for reading or writing. -*/ -ErtsGzFile erts_gzopen (path, mode) - const char *path; - const char *mode; -{ - return gz_open (path, mode); -} - - -/* =========================================================================== - Read a byte from a gz_stream; update next_in and avail_in. Return EOF - for end of file. - IN assertion: the stream s has been successfully opened for reading. -*/ -local int get_byte(s) - gz_stream *s; -{ - if (s->z_eof) return EOF; - if (s->stream.avail_in == 0) { -#ifdef UNIX - ssize_t res; - errno = 0; - res = ERTS_GZREAD(s->file, s->inbuf, Z_BUFSIZE); - if (res == 0) { - s->stream.avail_in = 0; - s->z_eof = 1; - return EOF; - } else if (res < 0) { - s->stream.avail_in = 0; - s->z_eof = 1; - s->z_err = Z_ERRNO; - return EOF; - } else { - s->stream.avail_in = (uInt) res; - } -#else - errno = 0; - s->stream.avail_in = ERTS_GZREAD(s->file, s->inbuf, Z_BUFSIZE); - if (s->stream.avail_in == 0) { - s->z_eof = 1; - if (s->file && ferror(s->file)) - s->z_err = Z_ERRNO; - return EOF; - } -#endif - s->stream.next_in = s->inbuf; - } - s->stream.avail_in--; - return *(s->stream.next_in)++; -} - -/* =========================================================================== - Check the gzip header of a gz_stream opened for reading. Set the stream - mode to transparent if the gzip magic header is not present; set s->err - to Z_DATA_ERROR if the magic header is present but the rest of the header - is incorrect. - IN assertion: the stream s has already been created sucessfully; - s->stream.avail_in is zero for the first time, but may be non-zero - for concatenated .gz files. -*/ -local void check_header(s) - gz_stream *s; -{ - int method; /* method byte */ - int flags; /* flags byte */ - uInt len; - int c; - - /* Check the gzip magic header */ - for (len = 0; len < 2; len++) { - c = get_byte(s); - if (c != gz_magic[len]) { - if (len != 0) s->stream.avail_in++, s->stream.next_in--; - if (c != EOF) { - s->stream.avail_in++, s->stream.next_in--; - s->transparent = 1; - } - s->z_err = s->stream.avail_in != 0 ? Z_OK : Z_STREAM_END; - return; - } - } - method = get_byte(s); - flags = get_byte(s); - if (method != Z_DEFLATED || (flags & RESERVED) != 0) { - s->z_err = Z_DATA_ERROR; - return; - } - - /* Discard time, xflags and OS code: */ - for (len = 0; len < 6; len++) (void)get_byte(s); - - if ((flags & EXTRA_FIELD) != 0) { /* skip the extra field */ - len = (uInt)get_byte(s); - len += ((uInt)get_byte(s))<<8; - /* len is garbage if EOF but the loop below will quit anyway */ - while (len-- != 0 && get_byte(s) != EOF) ; - } - if ((flags & ORIG_NAME) != 0) { /* skip the original file name */ - while ((c = get_byte(s)) != 0 && c != EOF) ; - } - if ((flags & COMMENT) != 0) { /* skip the .gz file comment */ - while ((c = get_byte(s)) != 0 && c != EOF) ; - } - if ((flags & HEAD_CRC) != 0) { /* skip the header crc */ - for (len = 0; len < 2; len++) (void)get_byte(s); - } - s->z_err = s->z_eof ? Z_DATA_ERROR : Z_OK; -} - - /* =========================================================================== - * Cleanup then free the given gz_stream. Return a zlib error code. - Try freeing in the reverse order of allocations. - */ -local int destroy (s) - gz_stream *s; -{ - int err = Z_OK; - - if (!s) return Z_STREAM_ERROR; - - TRYFREE(s->msg); - - if (s->stream.state != NULL) { - if (s->mode == 'w') { - err = deflateEnd(&(s->stream)); - } else if (s->mode == 'r') { - err = inflateEnd(&(s->stream)); - } - } -#ifdef UNIX - if (s->file != -1 && close(s->file)) { - err = Z_ERRNO; - } -#else - if (s->file != NULL && fclose(s->file)) { - err = Z_ERRNO; - } -#endif - if (s->z_err < 0) err = s->z_err; - - TRYFREE(s->inbuf); - TRYFREE(s->outbuf); - TRYFREE(s->path); - TRYFREE(s); - return err; -} - -/* =========================================================================== - Reads the given number of uncompressed bytes from the compressed file. - gzread returns the number of bytes actually read (0 for end of file). -*/ -int -erts_gzread(ErtsGzFile file, voidp buf, unsigned len) -{ - gz_stream *s = (gz_stream*)file; - Bytef *start = buf; /* starting point for crc computation */ - Byte *next_out; /* == stream.next_out but not forced far (for MSDOS) */ - - if (s == NULL || s->mode != 'r') return Z_STREAM_ERROR; - - if (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO) return -1; - if (s->z_err == Z_STREAM_END) return 0; /* EOF */ - - s->stream.next_out = next_out = buf; - s->stream.avail_out = len; - - while (s->stream.avail_out != 0) { - - if (s->transparent) { - /* Copy first the lookahead bytes: */ - uInt n = s->stream.avail_in; - if (n > s->stream.avail_out) n = s->stream.avail_out; - if (n > 0) { - zmemcpy(s->stream.next_out, s->stream.next_in, n); - next_out += n; - s->stream.next_out = next_out; - s->stream.next_in += n; - s->stream.avail_out -= n; - s->stream.avail_in -= n; - } - if (s->stream.avail_out > 0) { - s->stream.avail_out -= ERTS_GZREAD(s->file, next_out, - s->stream.avail_out); - } - len -= s->stream.avail_out; - s->stream.total_in += (uLong)len; - s->stream.total_out += (uLong)len; - if (len == 0) s->z_eof = 1; - s->position += (int)len; - return (int)len; - } - if (s->stream.avail_in == 0 && !s->z_eof) { -#ifdef UNIX - ssize_t res; - errno = 0; - res = ERTS_GZREAD(s->file, s->inbuf, Z_BUFSIZE); - if (res == 0) { - s->stream.avail_in = 0; - s->z_eof = 1; - return EOF; - } else if (res < 0) { - s->stream.avail_in = 0; - s->z_eof = 1; - s->z_err = Z_ERRNO; - return EOF; - } else { - s->stream.avail_in = (uInt) res; - } -#else - errno = 0; - s->stream.avail_in = ERTS_GZREAD(s->file, s->inbuf, Z_BUFSIZE); - if (s->stream.avail_in == 0) { - s->z_eof = 1; - if (s->file && ferror(s->file)) { - s->z_err = Z_ERRNO; - break; - } - } -#endif - s->stream.next_in = s->inbuf; - } - s->z_err = inflate(&(s->stream), Z_NO_FLUSH); - - if (s->z_err == Z_STREAM_END) { - /* Check CRC and original size */ - s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start)); - start = s->stream.next_out; - - if (getLong(s) != s->crc) { - s->z_err = Z_DATA_ERROR; - } else { - (void)getLong(s); - /* The uncompressed length returned by above getlong() may - * be different from s->stream.total_out) in case of - * concatenated .gz files. Check for such files: - */ - check_header(s); - if (s->z_err == Z_OK) { - uLong total_in = s->stream.total_in; - uLong total_out = s->stream.total_out; - - inflateReset(&(s->stream)); - s->stream.total_in = total_in; - s->stream.total_out = total_out; - s->crc = crc32(0L, Z_NULL, 0); - } - } - } - if (s->z_err != Z_OK || s->z_eof) break; - } - s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start)); - - s->position += (int)(len - s->stream.avail_out); - - return (int)(len - s->stream.avail_out); -} - -/* =========================================================================== - Writes the given number of uncompressed bytes into the compressed file. - gzwrite returns the number of bytes actually written (0 in case of error). -*/ -int -erts_gzwrite(ErtsGzFile file, voidp buf, unsigned len) -{ - gz_stream *s = (gz_stream*)file; - - if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR; - - s->stream.next_in = buf; - s->stream.avail_in = len; - - while (s->stream.avail_in != 0) { - - if (s->stream.avail_out == 0) { - - s->stream.next_out = s->outbuf; - if (ERTS_GZWRITE(s->file, s->outbuf, Z_BUFSIZE) != Z_BUFSIZE) { - s->z_err = Z_ERRNO; - break; - } - s->stream.avail_out = Z_BUFSIZE; - } - s->z_err = deflate(&(s->stream), Z_NO_FLUSH); - if (s->z_err != Z_OK) break; - } - s->position += (int)(len - s->stream.avail_in); - return (int)(len - s->stream.avail_in); -} - -/* - * For use by Erlang file driver. - * - * XXX Limitations: - * - SEEK_END is not allowed (length of file is not known). - * - When writing, only forward seek is supported. - */ - -int -erts_gzseek(ErtsGzFile file, int offset, int whence) -{ - int pos; - gz_stream* s = (gz_stream *) file; - - switch (whence) { - case EFILE_SEEK_SET: whence = SEEK_SET; break; - case EFILE_SEEK_CUR: whence = SEEK_CUR; break; - case EFILE_SEEK_END: whence = SEEK_END; break; - default: - errno = EINVAL; - return -1; - } - - if (s == NULL) { - errno = EINVAL; - return -1; - } - if (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO) { - errno = EIO; - return -1; - } - - switch (whence) { - case SEEK_SET: pos = offset; break; - case SEEK_CUR: pos = s->position+offset; break; - case SEEK_END: - default: - errno = EINVAL; return -1; - } - - if (pos == s->position) { - return pos; - } - - if (pos < s->position) { - if (s->mode == 'w') { - errno = EINVAL; - return -1; - } - gz_rewind(s); - } - - while (s->position < pos) { - char buf[512]; - int n; - int save_pos = s->position; - - n = pos - s->position; - if (n > sizeof(buf)) - n = sizeof(buf); - - if (s->mode == 'r') { - erts_gzread(file, buf, n); - } else { - memset(buf, '\0', n); - erts_gzwrite(file, buf, n); - } - if (save_pos == s->position) break; - } - - return s->position; -} - -/* =========================================================================== - Flushes all pending output into the compressed file. The parameter - flush is as in the deflate() function. - gzflush should be called only when strictly necessary because it can - degrade compression. -*/ -int -erts_gzflush(ErtsGzFile file, int flush) -{ - uInt len; - int done = 0; - gz_stream *s = (gz_stream*)file; - - if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR; - - s->stream.avail_in = 0; /* should be zero already anyway */ - - for (;;) { - len = Z_BUFSIZE - s->stream.avail_out; - - if (len != 0) { - if ((uInt)ERTS_GZWRITE(s->file, s->outbuf, len) != len) { - s->z_err = Z_ERRNO; - return Z_ERRNO; - } - s->stream.next_out = s->outbuf; - s->stream.avail_out = Z_BUFSIZE; - } - if (done) break; - s->z_err = deflate(&(s->stream), flush); - - /* deflate has finished flushing only when it hasn't used up - * all the available space in the output buffer: - */ - done = (s->stream.avail_out != 0 || s->z_err == Z_STREAM_END); - - if (s->z_err != Z_OK && s->z_err != Z_STREAM_END) break; - } -#ifndef UNIX - fflush(s->file); -#endif - return s->z_err == Z_STREAM_END ? Z_OK : s->z_err; -} - -/* =========================================================================== - Reads a long in LSB order from the given gz_stream. Sets -*/ -local uLong getLong (s) - gz_stream *s; -{ - uLong x = (uLong)get_byte(s); - int c; - - x += ((uLong)get_byte(s))<<8; - x += ((uLong)get_byte(s))<<16; - c = get_byte(s); - if (c == EOF) s->z_err = Z_DATA_ERROR; - x += ((uLong)c)<<24; - return x; -} - -/* =========================================================================== - Flushes all pending output if necessary, closes the compressed file - and deallocates all the (de)compression state. -*/ -int -erts_gzclose(ErtsGzFile file) -{ - int err; - gz_stream *s = (gz_stream*)file; - - if (s == NULL) return Z_STREAM_ERROR; - - if (s->mode == 'w') { - err = erts_gzflush (file, Z_FINISH); - if (err != Z_OK) return s->destroy(s); - } - return s->destroy(s); -} - - /* =========================================================================== Uncompresses the buffer given and returns a pointer to a binary. If the buffer was not compressed with gzip, the buffer contents diff --git a/erts/emulator/drivers/common/gzio.h b/erts/emulator/drivers/common/gzio.h index ee0ebe7bd8..e331b5208b 100644 --- a/erts/emulator/drivers/common/gzio.h +++ b/erts/emulator/drivers/common/gzio.h @@ -20,13 +20,5 @@ #include "zlib.h" -typedef struct erts_gzFile* ErtsGzFile; - -ErtsGzFile erts_gzopen (const char *path, const char *mode); -int erts_gzread(ErtsGzFile file, voidp buf, unsigned len); -int erts_gzwrite(ErtsGzFile file, voidp buf, unsigned len); -int erts_gzseek(ErtsGzFile, int, int); -int erts_gzflush(ErtsGzFile file, int flush); -int erts_gzclose(ErtsGzFile file); ErlDrvBinary* erts_gzinflate_buffer(char*, uLong); ErlDrvBinary* erts_gzdeflate_buffer(char*, uLong); diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c index 554c48059f..4294fb4f46 100644 --- a/erts/emulator/drivers/common/inet_drv.c +++ b/erts/emulator/drivers/common/inet_drv.c @@ -63,6 +63,20 @@ #include <sys/un.h> #endif +#ifdef HAVE_SENDFILE +#if defined(__linux__) || (defined(__sun) && defined(__SVR4)) + #include <sys/sendfile.h> +#elif defined(__FreeBSD__) || defined(__DragonFly__) + /* Need to define __BSD_VISIBLE in order to expose prototype of sendfile */ + #define __BSD_VISIBLE 1 + #include <sys/socket.h> +#endif +#endif + +#if defined(__APPLE__) && defined(__MACH__) && !defined(__DARWIN__) + #define __DARWIN__ 1 +#endif + /* All platforms fail on malloc errors. */ #define FATAL_MALLOC @@ -701,6 +715,7 @@ static size_t my_strnlen(const char *s, size_t maxlen) #define TCP_REQ_RECV 42 #define TCP_REQ_UNRECV 43 #define TCP_REQ_SHUTDOWN 44 +#define TCP_REQ_SENDFILE 45 /* UDP and SCTP requests */ #define PACKET_REQ_RECV 60 /* Common for UDP and SCTP */ /* #define SCTP_REQ_LISTEN 61 MERGED Different from TCP; not for UDP */ @@ -723,6 +738,7 @@ static size_t my_strnlen(const char *s, size_t maxlen) #define TCP_ADDF_DELAYED_ECONNRESET 128 /* An ECONNRESET error occurred on send or shutdown */ #define TCP_ADDF_SHUTDOWN_WR_DONE 256 /* A shutdown(sock, SHUT_WR) or SHUT_RDWR was made */ #define TCP_ADDF_LINGER_ZERO 512 /* Discard driver queue on port close */ +#define TCP_ADDF_SENDFILE 1024 /* Send from an fd instead of the driver queue */ /* *_REQ_* replies */ #define INET_REP_ERROR 0 @@ -1136,7 +1152,6 @@ static int packet_inet_init(void); static void packet_inet_stop(ErlDrvData); static void packet_inet_command(ErlDrvData, char*, ErlDrvSizeT); static void packet_inet_drv_input(ErlDrvData data, ErlDrvEvent event); -static void packet_inet_drv_output(ErlDrvData data, ErlDrvEvent event); static ErlDrvData udp_inet_start(ErlDrvPort, char* command); #ifdef HAVE_SCTP static ErlDrvData sctp_inet_start(ErlDrvPort, char* command); @@ -1161,7 +1176,7 @@ static struct erl_drv_entry udp_inet_driver_entry = NULL, #else packet_inet_drv_input, - packet_inet_drv_output, + NULL, #endif "udp_inet", NULL, @@ -1196,7 +1211,7 @@ static struct erl_drv_entry sctp_inet_driver_entry = NULL, #else packet_inet_drv_input, - packet_inet_drv_output, + NULL, #endif "sctp_inet", NULL, @@ -1236,6 +1251,21 @@ typedef struct { inet_async_multi_op *multi_first;/* NULL == no multi-accept-queue, op is in ordinary queue */ inet_async_multi_op *multi_last; MultiTimerData *mtd; /* Timer structures for multiple accept */ +#ifdef HAVE_SENDFILE + struct { + ErlDrvSizeT ioq_skip; /* The number of bytes in the queue at the time + * sendfile was issued, which must be sent + * before issuing the sendfile call itself. */ + int dup_file_fd; /* The file handle to send from; this is + * duplicated when sendfile is issued to + * reduce (but not eliminate) the impact of a + * nasty race, so we have to remember to close + * it. */ + Uint64 bytes_sent; + Uint64 offset; + Uint64 length; + } sendfile; +#endif } tcp_descriptor; /* send function */ @@ -1246,6 +1276,8 @@ static int tcp_deliver(tcp_descriptor* desc, int len); static int tcp_shutdown_error(tcp_descriptor* desc, int err); +static int tcp_inet_sendfile(tcp_descriptor* desc); + static int tcp_inet_output(tcp_descriptor* desc, HANDLE event); static int tcp_inet_input(tcp_descriptor* desc, HANDLE event); @@ -1262,7 +1294,6 @@ typedef struct { static int packet_inet_input(udp_descriptor* udesc, HANDLE event); -static int packet_inet_output(udp_descriptor* udesc, HANDLE event); #endif /* convert descriptor pointer to inet_descriptor pointer */ @@ -1331,6 +1362,9 @@ static ErlDrvTermData am_ipv6_v6only; static ErlDrvTermData am_netns; static ErlDrvTermData am_bind_to_device; #endif +#ifdef HAVE_SENDFILE +static ErlDrvTermData am_sendfile; +#endif static char str_eafnosupport[] = "eafnosupport"; static char str_einval[] = "einval"; @@ -3877,6 +3911,10 @@ static int inet_init() INIT_ATOM(https); INIT_ATOM(scheme); +#ifdef HAVE_SENDFILE + INIT_ATOM(sendfile); +#endif + /* add TCP, UDP and SCTP drivers */ add_driver_entry(&tcp_inet_driver_entry); #ifdef HAVE_UDP @@ -9272,6 +9310,13 @@ static void tcp_inet_stop(ErlDrvData e) * will be freed through tcp_inet_stop later on. */ static void tcp_desc_close(tcp_descriptor* desc) { +#ifdef HAVE_SENDFILE + if(desc->tcp_add_flags & TCP_ADDF_SENDFILE) { + desc->tcp_add_flags &= ~TCP_ADDF_SENDFILE; + close(desc->sendfile.dup_file_fd); + } +#endif + tcp_clear_input(desc); tcp_clear_output(desc); @@ -9610,6 +9655,60 @@ static ErlDrvSSizeT tcp_inet_ctl(ErlDrvData e, unsigned int cmd, return ctl_reply(INET_REP_OK, NULL, 0, rbuf, rsize); } } + + case TCP_REQ_SENDFILE: { +#ifdef HAVE_SENDFILE + const ErlDrvSizeT required_len = + sizeof(desc->sendfile.dup_file_fd) + + sizeof(Uint64) * 2; + + int raw_file_fd; + + DEBUGF(("tcp_inet_ctl(%ld): SENDFILE\r\n", (long)desc->inet.port)); + + if (len != required_len) { + return ctl_error(EINVAL, rbuf, rsize); + } else if (!IS_CONNECTED(INETP(desc))) { + return ctl_error(ENOTCONN, rbuf, rsize); + } + + sys_memcpy(&raw_file_fd, buf, sizeof(raw_file_fd)); + buf += sizeof(raw_file_fd); + + desc->sendfile.dup_file_fd = dup(raw_file_fd); + + if(desc->sendfile.dup_file_fd == -1) { + return ctl_error(errno, rbuf, rsize); + } + + desc->sendfile.offset = get_int64(buf); + buf += sizeof(Uint64); + + desc->sendfile.length = get_int64(buf); + buf += sizeof(Uint64); + + ASSERT(desc->sendfile.offset >= 0); + ASSERT(desc->sendfile.length >= 0); + + desc->sendfile.ioq_skip = driver_sizeq(desc->inet.port); + desc->sendfile.bytes_sent = 0; + + desc->inet.caller = driver_caller(desc->inet.port); + desc->tcp_add_flags |= TCP_ADDF_SENDFILE; + + /* See if we can finish sending without selecting & rescheduling. */ + tcp_inet_sendfile(desc); + + if(desc->sendfile.length > 0) { + sock_select(INETP(desc), FD_WRITE, 1); + } + + return ctl_reply(INET_REP_OK, NULL, 0, rbuf, rsize); +#else + return ctl_error(ENOTSUP, rbuf, rsize); +#endif + } + default: DEBUGF(("tcp_inet_ctl(%ld): %u\r\n", (long)desc->inet.port, cmd)); return inet_ctl(INETP(desc), cmd, buf, len, rbuf, rsize); @@ -9749,12 +9848,27 @@ static void tcp_inet_commandv(ErlDrvData e, ErlIOVec* ev) static void tcp_inet_flush(ErlDrvData e) { tcp_descriptor* desc = (tcp_descriptor*)e; - if (!(desc->inet.event_mask & FD_WRITE)) { - /* Discard send queue to avoid hanging port (OTP-7615) */ - tcp_clear_output(desc); + int discard_output; + + /* Discard send queue to avoid hanging port (OTP-7615) */ + discard_output = !(desc->inet.event_mask & FD_WRITE); + + discard_output |= desc->tcp_add_flags & TCP_ADDF_LINGER_ZERO; + +#ifdef HAVE_SENDFILE + /* The old file driver aborted when it was stopped during sendfile, so + * we'll clear the flag and discard all output. */ + if(desc->tcp_add_flags & TCP_ADDF_SENDFILE) { + desc->tcp_add_flags &= ~TCP_ADDF_SENDFILE; + close(desc->sendfile.dup_file_fd); + + discard_output = 1; + } +#endif + + if (discard_output) { + tcp_clear_output(desc); } - if (desc->tcp_add_flags & TCP_ADDF_LINGER_ZERO) - tcp_clear_output(desc); } static void tcp_inet_process_exit(ErlDrvData e, ErlDrvMonitor *monitorp) @@ -10649,7 +10763,9 @@ static int tcp_sendv(tcp_descriptor* desc, ErlIOVec* ev) ev->size += h_len; } - if ((sz = driver_sizeq(ix)) > 0) { + sz = driver_sizeq(ix); + + if ((desc->tcp_add_flags & TCP_ADDF_SENDFILE) || sz > 0) { driver_enqv(ix, ev, 0); if (sz+ev->size >= desc->high) { DEBUGF(("tcp_sendv(%ld): s=%d, sender forced busy\r\n", @@ -10743,8 +10859,9 @@ static int tcp_send(tcp_descriptor* desc, char* ptr, ErlDrvSizeT len) inet_output_count(INETP(desc), len+h_len); + sz = driver_sizeq(ix); - if ((sz = driver_sizeq(ix)) > 0) { + if ((desc->tcp_add_flags & TCP_ADDF_SENDFILE) || sz > 0) { if (h_len > 0) driver_enq(ix, buf, h_len); driver_enq(ix, ptr, len); @@ -10834,6 +10951,246 @@ static void tcp_inet_drv_input(ErlDrvData data, ErlDrvEvent event) (void)tcp_inet_input((tcp_descriptor*)data, (HANDLE)event); } +#ifdef HAVE_SENDFILE +static int tcp_sendfile_completed(tcp_descriptor* desc) { + ErlDrvTermData spec[LOAD_PORT_CNT + LOAD_TUPLE_CNT * 2 + + LOAD_ATOM_CNT * 2 + LOAD_UINT_CNT * 2]; + Uint32 sent_low, sent_high; + int i; + + desc->tcp_add_flags &= ~TCP_ADDF_SENDFILE; + close(desc->sendfile.dup_file_fd); + + /* While we flushed the output queue prior to sending the file, we've + * deferred clearing busy status until now as there's no point in doing so + * while we still have a file to send. + * + * The watermark is checked since more data may have been added while we + * were sending the file. */ + + if (driver_sizeq(desc->inet.port) <= desc->low) { + if (IS_BUSY(INETP(desc))) { + desc->inet.caller = desc->inet.busy_caller; + desc->inet.state &= ~INET_F_BUSY; + + set_busy_port(desc->inet.port, 0); + + /* if we have a timer then cancel and send ok to client */ + if (desc->busy_on_send) { + driver_cancel_timer(desc->inet.port); + desc->busy_on_send = 0; + } + + inet_reply_ok(INETP(desc)); + } + } + + if (driver_sizeq(desc->inet.port) == 0) { + sock_select(INETP(desc), FD_WRITE, 0); + send_empty_out_q_msgs(INETP(desc)); + + if (desc->tcp_add_flags & TCP_ADDF_PENDING_SHUTDOWN) { + tcp_shutdown_async(desc); + } + } + + sent_low = ((Uint64)desc->sendfile.bytes_sent >> 0) & 0xFFFFFFFF; + sent_high = ((Uint64)desc->sendfile.bytes_sent >> 32) & 0xFFFFFFFF; + + i = LOAD_ATOM(spec, 0, am_sendfile); + i = LOAD_PORT(spec, i, desc->inet.dport); + i = LOAD_ATOM(spec, i, am_ok); + i = LOAD_UINT(spec, i, sent_low); + i = LOAD_UINT(spec, i, sent_high); + i = LOAD_TUPLE(spec, i, 3); + i = LOAD_TUPLE(spec, i, 3); + + ASSERT(i == sizeof(spec)/sizeof(*spec)); + + return erl_drv_output_term(desc->inet.dport, spec, i); +} + +static int tcp_sendfile_aborted(tcp_descriptor* desc, int socket_error) { + ErlDrvTermData spec[LOAD_PORT_CNT + LOAD_TUPLE_CNT * 2 + LOAD_ATOM_CNT * 3]; + int i; + + /* We don't clean up sendfile state here, as that's done in tcp_desc_close + * following normal error handling. All we do here is report the failure. */ + + i = LOAD_ATOM(spec, 0, am_sendfile); + i = LOAD_PORT(spec, i, desc->inet.dport); + i = LOAD_ATOM(spec, i, am_error); + + switch (socket_error) { + case ECONNRESET: + case ENOTCONN: + case EPIPE: + i = LOAD_ATOM(spec, i, am_closed); + break; + default: + i = LOAD_ATOM(spec, i, error_atom(socket_error)); + } + + i = LOAD_TUPLE(spec, i, 2); + i = LOAD_TUPLE(spec, i, 3); + + ASSERT(i == sizeof(spec)/sizeof(*spec)); + + return erl_drv_output_term(desc->inet.dport, spec, i); +} + +static int tcp_inet_sendfile(tcp_descriptor* desc) { + ErlDrvPort ix = desc->inet.port; + int result = 0; + ssize_t n; + + DEBUGF(("tcp_inet_sendfile(%ld) {s=%d\r\n", (long)ix, desc->inet.s)); + + /* If there was any data in the queue by the time sendfile was issued, + * we'll need to skip it first. Note that we don't clear busy status until + * we're finished sending the file. */ + while (desc->sendfile.ioq_skip > 0) { + ssize_t bytes_to_send; + SysIOVec* iov; + int vsize; + + ASSERT(driver_sizeq(ix) >= desc->sendfile.ioq_skip); + + if ((iov = driver_peekq(ix, &vsize)) == NULL) { + ERTS_INTERNAL_ERROR("ioq empty when sendfile.ioq_skip > 0"); + } + + bytes_to_send = MIN(desc->sendfile.ioq_skip, iov[0].iov_len); + n = sock_send(desc->inet.s, iov[0].iov_base, bytes_to_send, 0); + + if (!IS_SOCKET_ERROR(n)) { + desc->sendfile.ioq_skip -= n; + driver_deq(ix, n); + } else if (sock_errno() == ERRNO_BLOCK) { +#ifdef __WIN32__ + desc->inet.send_would_block = 1; +#endif + goto done; + } else if (sock_errno() != EINTR) { + goto socket_error; + } + } + + while (desc->sendfile.length > 0) { + /* For some reason the maximum ssize_t cannot be used as the max size. + * 1GB seems to work on all platforms */ + const Sint64 SENDFILE_CHUNK_SIZE = ((1UL << 30) - 1); + + ssize_t bytes_to_send = MIN(SENDFILE_CHUNK_SIZE, desc->sendfile.length); + off_t offset = desc->sendfile.offset; + +#if defined(__linux__) + n = sendfile(desc->inet.s, desc->sendfile.dup_file_fd, &offset, + bytes_to_send); +#elif defined(__FreeBSD__) || defined(__DragonFly__) || defined(__DARWIN__) + { + off_t bytes_sent; + int error; + + #if defined(__DARWIN__) + bytes_sent = bytes_to_send; + + error = sendfile(desc->sendfile.dup_file_fd, desc->inet.s, offset, + &bytes_sent, NULL, 0); + n = bytes_sent; + #else + error = sendfile(desc->sendfile.dup_file_fd, desc->inet.s, offset, + bytes_to_send, NULL, &bytes_sent, 0); + n = bytes_sent; + #endif + + if(error < 0) { + /* EAGAIN/EINTR report partial success by setting bytes_sent, + * so we have to skip error handling if nonzero, and skip EOF + * handling if zero, as it's possible that we didn't manage to + * send anything at all before being interrupted by a + * signal. */ + if((errno != EAGAIN && errno != EINTR) || bytes_sent == 0) { + n = -1; + } + } + } +#elif defined(__sun) && defined(__SVR4) && defined(HAVE_SENDFILEV) + { + sendfilevec_t sfvec[1]; + size_t bytes_sent; + ssize_t error; + + sfvec[0].sfv_fd = desc->sendfile.dup_file_fd; + sfvec[0].sfv_len = bytes_to_send; + sfvec[0].sfv_off = offset; + sfvec[0].sfv_flag = 0; + + error = sendfilev(desc->inet.s, sfvec, 1, &bytes_sent); + n = bytes_sent; + + if(error < 0) { + if(errno == EINVAL) { + /* On some solaris versions (I've seen it on SunOS 5.10), + * using a sfv_len larger than the filesize will result in + * a (-1 && errno == EINVAL). We translate this to a + * successful send of the data.*/ + } else { + /* EAGAIN/EINTR behavior is identical to *BSD. */ + if((errno != EAGAIN && errno != EINTR) || bytes_sent == 0) { + n = -1; + } + } + } + } +#else + #error "Unsupported sendfile syscall; update configure test." +#endif + + if (n > 0) { + desc->sendfile.bytes_sent += n; + desc->sendfile.offset += n; + desc->sendfile.length -= n; + } else if (n == 0) { + /* EOF. */ + desc->sendfile.length = 0; + break; + } else if (IS_SOCKET_ERROR(n) && sock_errno() != EINTR) { + if (sock_errno() != ERRNO_BLOCK) { + goto socket_error; + } + +#ifdef __WIN32__ + desc->inet.send_would_block = 1; +#endif + break; + } + } + + if (desc->sendfile.length == 0) { + tcp_sendfile_completed(desc); + } + + goto done; + +socket_error: { + int socket_errno = sock_errno(); + + DEBUGF(("tcp_inet_sendfile(%ld): send errno = %d (errno %d)\r\n", + (long)desc->inet.port, socket_errno, errno)); + + result = tcp_send_error(desc, socket_errno); + tcp_sendfile_aborted(desc, socket_errno); + + goto done; + } + +done: + DEBUGF(("tcp_inet_sendfile(%ld) }\r\n", (long)desc->inet.port)); + return result; +} +#endif /* HAVE_SENDFILE */ + /* socket ready for ouput: ** 1. INET_STATE_CONNECTING => non block connect ? ** 2. INET_STATE_CONNECTED => write output @@ -10894,7 +11251,14 @@ static int tcp_inet_output(tcp_descriptor* desc, HANDLE event) async_ok(INETP(desc)); } else if (IS_CONNECTED(INETP(desc))) { - for (;;) { + +#ifdef HAVE_SENDFILE + if(desc->tcp_add_flags & TCP_ADDF_SENDFILE) { + return tcp_inet_sendfile(desc); + } +#endif + + for (;;) { int vsize; ssize_t n; SysIOVec* iov; @@ -11300,24 +11664,20 @@ static ErlDrvSSizeT packet_inet_ctl(ErlDrvData e, unsigned int cmd, char* buf, (desc->sfamily, &remote, &buf, &len)) != NULL) return ctl_xerror(xerror, rbuf, rsize); - sock_select(desc, FD_CONNECT, 1); code = sock_connect(desc->s, &remote.sa, len); if (IS_SOCKET_ERROR(code) && (sock_errno() == EINPROGRESS)) { /* XXX: Unix only -- WinSock would have a different cond! */ - desc->state = INET_STATE_CONNECTING; if (timeout != INET_INFINITY) driver_set_timer(desc->port, timeout); enq_async(desc, tbuf, INET_REQ_CONNECT); + async_ok(desc); } else if (code == 0) { /* OK we are connected */ - sock_select(desc, FD_CONNECT, 0); - desc->state = INET_STATE_CONNECTED; enq_async(desc, tbuf, INET_REQ_CONNECT); async_ok(desc); } else { - sock_select(desc, FD_CONNECT, 0); return ctl_error(sock_errno(), rbuf, rsize); } return ctl_reply(INET_REP_OK, tbuf, 2, rbuf, rsize); @@ -11832,77 +12192,6 @@ static int packet_inet_input(udp_descriptor* udesc, HANDLE event) return count; } -static void packet_inet_drv_output(ErlDrvData e, ErlDrvEvent event) -{ - (void) packet_inet_output((udp_descriptor*)e, (HANDLE)event); -} - -/* UDP/SCTP socket ready for output: -** This is a Back-End for Non-Block SCTP Connect (INET_STATE_CONNECTING) -*/ -static int packet_inet_output(udp_descriptor* udesc, HANDLE event) -{ - inet_descriptor* desc = INETP(udesc); - int ret = 0; - ErlDrvPort ix = desc->port; - - DEBUGF(("packet_inet_output(%ld) {s=%d\r\n", - (long)desc->port, desc->s)); - - if (desc->state == INET_STATE_CONNECTING) { - sock_select(desc, FD_CONNECT, 0); - - driver_cancel_timer(ix); /* posssibly cancel a timer */ -#ifndef __WIN32__ - /* - * XXX This is strange. This *should* work on Windows NT too, - * but doesn't. An bug in Winsock 2.0 for Windows NT? - * - * See "Unix Netwok Programming", W.R.Stevens, p 412 for a - * discussion about Unix portability and non blocking connect. - */ - -#ifndef SO_ERROR - { - int sz = sizeof(desc->remote); - int code = sock_peer(desc->s, - (struct sockaddr*) &desc->remote, &sz); - - if (IS_SOCKET_ERROR(code)) { - desc->state = INET_STATE_OPEN; /* restore state */ - ret = async_error(desc, sock_errno()); - goto done; - } - } -#else - { - int error = 0; /* Has to be initiated, we check it */ - unsigned int sz = sizeof(error); /* even if we get -1 */ - int code = sock_getopt(desc->s, SOL_SOCKET, SO_ERROR, - (void *)&error, &sz); - - if ((code < 0) || error) { - desc->state = INET_STATE_OPEN; /* restore state */ - ret = async_error(desc, error); - goto done; - } - } -#endif /* SO_ERROR */ -#endif /* !__WIN32__ */ - - desc->state = INET_STATE_CONNECTED; - async_ok(desc); - } - else { - sock_select(desc,FD_CONNECT,0); - - DEBUGF(("packet_inet_output(%ld): bad state: %04x\r\n", - (long)desc->port, desc->state)); - } - done: - DEBUGF(("packet_inet_output(%ld) }\r\n", (long)desc->port)); - return ret; -} #endif /*---------------------------------------------------------------------------*/ |