diff options
Diffstat (limited to 'erts/emulator/drivers/ose')
| -rw-r--r-- | erts/emulator/drivers/ose/ose_efile.c | 1124 | ||||
| -rw-r--r-- | erts/emulator/drivers/ose/ose_signal_drv.c | 896 | ||||
| -rw-r--r-- | erts/emulator/drivers/ose/ttsl_drv.c | 68 |
3 files changed, 2088 insertions, 0 deletions
diff --git a/erts/emulator/drivers/ose/ose_efile.c b/erts/emulator/drivers/ose/ose_efile.c new file mode 100644 index 0000000000..035ff81a9b --- /dev/null +++ b/erts/emulator/drivers/ose/ose_efile.c @@ -0,0 +1,1124 @@ +/* + * %CopyrightBegin% + * + * Copyright Ericsson AB 1997-2012. All Rights Reserved. + * + * The contents of this file are subject to the Erlang Public License, + * Version 1.1, (the "License"); you may not use this file except in + * compliance with the License. You should have received a copy of the + * Erlang Public License along with this software. If not, it can be + * retrieved online at http://www.erlang.org/. + * + * Software distributed under the License is distributed on an "AS IS" + * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + * the License for the specific language governing rights and limitations + * under the License. + * + * %CopyrightEnd% + */ +/* + * Purpose: Provides file and directory operations for OSE. + */ +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif +#if defined(HAVE_POSIX_FALLOCATE) && !defined(__sun) && !defined(__sun__) +#define _XOPEN_SOURCE 600 +#endif +#if !defined(_GNU_SOURCE) && defined(HAVE_LINUX_FALLOC_H) +#define _GNU_SOURCE +#endif +#include "sys.h" +#include "erl_driver.h" +#include "erl_efile.h" +#if defined(DARWIN) || defined(HAVE_LINUX_FALLOC_H) || defined(HAVE_POSIX_FALLOCATE) +#include "fcntl.h" +#endif +#include "ose.h" +#include "unistd.h" +#include "sys/stat.h" +#include "dirent.h" +#include "sys/time.h" +#include "time.h" +#include "assert.h" + +/* Find a definition of MAXIOV, that is used in the code later. */ +#if defined IOV_MAX +#define MAXIOV IOV_MAX +#elif defined UIO_MAXIOV +#define MAXIOV UIO_MAXIOV +#else +#define MAXIOV 16 +#endif + +/* + * Macros for testing file types. + */ + +#define ISDIR(st) (((st).st_mode & S_IFMT) == S_IFDIR) +#define ISREG(st) (((st).st_mode & S_IFMT) == S_IFREG) +#define ISDEV(st) \ + (((st).st_mode&S_IFMT) == S_IFCHR || ((st).st_mode&S_IFMT) == S_IFBLK) +#define ISLNK(st) (((st).st_mode & S_IFLNK) == S_IFLNK) +#ifdef NO_UMASK +#define FILE_MODE 0644 +#define DIR_MODE 0755 +#else +#define FILE_MODE 0666 +#define DIR_MODE 0777 +#endif + +#define IS_DOT_OR_DOTDOT(s) \ + (s[0] == '.' && (s[1] == '\0' || (s[1] == '.' && s[2] == '\0'))) + +/* + * Macros for handling local file descriptors + * and mutexes. + * + * Handling of files like this is necessary because OSE + * does not allow seeking after the end of a file. So + * what we do it emulate this by keeping track of the size + * of the file and where the file's positions is. If a + * write happens after eof then we pad it. + * + * Given time this should be rewritten to get rid of the + * mutex and use the port lock to protect the data. This + * could be done be done by adapting the efile api for some + * calls to allow some meta-data to be associated with the + * open file. + */ + +#define L_FD_IS_VALID(fd_data) ((fd_data)->beyond_eof > 0) +#define L_FD_INVALIDATE(fd_data) (fd_data)->beyond_eof = 0 +#define L_FD_CUR(fd_data) (fd_data)->pos +#define L_FD_OFFS_BEYOND_EOF(fd_data, offs) \ + (((fd_data)->size > offs) ? 0 : 1) + +#define L_FD_FAIL -1 +#define L_FD_SUCCESS 1 +#define L_FD_PAD_SIZE 255 + +struct fd_meta { + ErlDrvMutex *meta_mtx; + struct fd_data *fd_data_list; +}; + +struct fd_data { + int fd; + struct fd_data *next; + struct fd_data *prev; + int pos; + int beyond_eof; + size_t size; +#ifdef DEBUG + PROCESS owner; +#endif +}; + +static int l_invalidate_local_fd(int fd); +static int l_pad_file(struct fd_data *fd_data, off_t offset); +static int check_error(int result, Efile_error* errInfo); +static struct fd_data* l_new_fd(void); +static int l_remove_local_fd(int fd); +static struct fd_data* l_find_local_fd(int fd); +static int l_update_local_fd(int fd, int pos, int size); + +static struct fd_meta* fdm = NULL; + + +/***************************************************************************/ + +static int +l_remove_local_fd(int fd) +{ + struct fd_data *fd_data; + fd_data = l_find_local_fd(fd); + + if (fd_data == NULL) { + return L_FD_FAIL; + } +#ifdef DEBUG + assert(fd_data->owner == current_process()); +#endif + erl_drv_mutex_lock(fdm->meta_mtx); + /* head ? */ + if (fd_data == fdm->fd_data_list) { + if (fd_data->next != NULL) { + /* remove link to head */ + fd_data->next->prev = NULL; + /* set new head */ + fdm->fd_data_list = fd_data->next; + } + else { + /* head is lonely */ + fdm->fd_data_list = NULL; + } + } + else { /* not head */ + if (fd_data->prev == NULL) { + erl_drv_mutex_unlock(fdm->meta_mtx); + return L_FD_FAIL; + } + else { + if (fd_data->next != NULL) { + fd_data->next->prev = fd_data->prev; + fd_data->prev->next = fd_data->next; + } + else { + fd_data->prev->next = NULL; + } + } + } + + /* scramble values */ + fd_data->beyond_eof = -1; + fd_data->next = NULL; + fd_data->prev = NULL; + fd_data->fd = -1; + + /* unlock and clean */ + driver_free(fd_data); + erl_drv_mutex_unlock(fdm->meta_mtx); + + return L_FD_SUCCESS; +} + +/***************************************************************************/ + +static int +l_invalidate_local_fd(int fd) { + struct fd_data *fd_data; + + if ((fd_data = l_find_local_fd(fd)) == NULL) { + return L_FD_FAIL; + } + + fd_data->beyond_eof = 0; + return L_FD_SUCCESS; +} + +/****************************************************************************/ + +static struct fd_data* +l_find_local_fd(int fd) { + struct fd_data *fd_data; + + fd_data = NULL; + erl_drv_mutex_lock(fdm->meta_mtx); + for (fd_data = fdm->fd_data_list; fd_data != NULL; ) { + if (fd_data->fd == fd) { +#ifdef DEBUG + assert(fd_data->owner == current_process()); +#endif + break; + } + fd_data = fd_data->next; + } + erl_drv_mutex_unlock(fdm->meta_mtx); + return fd_data; +} + +/***************************************************************************/ + +static struct fd_data* +l_new_fd(void) { + struct fd_data *fd_data; + + fd_data = driver_alloc(sizeof(struct fd_data)); + if (fd_data == NULL) { + return NULL; + } + erl_drv_mutex_lock(fdm->meta_mtx); + if (fdm->fd_data_list == NULL) { + fdm->fd_data_list = fd_data; + fdm->fd_data_list->prev = NULL; + fdm->fd_data_list->next = NULL; + } + else { + fd_data->next = fdm->fd_data_list; + fdm->fd_data_list = fd_data; + fdm->fd_data_list->prev = NULL; + } +#ifdef DEBUG + fd_data->owner = current_process(); +#endif + erl_drv_mutex_unlock(fdm->meta_mtx); + return fd_data; +} + +/***************************************************************************/ + +static int +l_update_local_fd(int fd, int pos, int size) { + struct fd_data *fd_data = NULL; + + fd_data = l_find_local_fd(fd); + /* new fd to handle? */ + if (fd_data == NULL) { + fd_data = l_new_fd(); + if (fd_data == NULL) { + /* out of memory */ + return L_FD_FAIL; + } + } + fd_data->size = size; + fd_data->pos = pos; + fd_data->fd = fd; + fd_data->beyond_eof = 1; + + return L_FD_SUCCESS; +} + +/***************************************************************************/ + +static int +l_pad_file(struct fd_data *fd_data, off_t offset) { + int size_dif; + int written = 0; + int ret_val = L_FD_SUCCESS; + char padding[L_FD_PAD_SIZE]; + + size_dif = (offset - fd_data->size); + memset(&padding, '\0', L_FD_PAD_SIZE); + + while (size_dif > 0) { + written = write(fd_data->fd, padding, + (size_dif < L_FD_PAD_SIZE) ? + size_dif : L_FD_PAD_SIZE); + if (written < 0 && errno != EINTR && errno != EAGAIN) { + ret_val = -1; + break; + } + size_dif -= written; + } + L_FD_INVALIDATE(fd_data); + return ret_val; +} + +/***************************************************************************/ + +static int +check_error(int result, Efile_error *errInfo) { + if (result < 0) { + errInfo->posix_errno = errInfo->os_errno = errno; + return 0; + } + return 1; +} + +/***************************************************************************/ + +int +efile_init() { + fdm = driver_alloc(sizeof(struct fd_meta)); + if (fdm == NULL) { + return L_FD_FAIL; + } + fdm->meta_mtx = erl_drv_mutex_create("ose_efile local fd mutex\n"); + erl_drv_mutex_lock(fdm->meta_mtx); + fdm->fd_data_list = NULL; + erl_drv_mutex_unlock(fdm->meta_mtx); + return L_FD_SUCCESS; +} + +/***************************************************************************/ + +int +efile_mkdir(Efile_error* errInfo, /* Where to return error codes. */ + char* name) /* Name of directory to create. */ +{ +#ifdef NO_MKDIR_MODE + return check_error(mkdir(name), errInfo); +#else + int res = mkdir(name, DIR_MODE); + if (res < 0 && errno == EINVAL) { + errno = ENOENT; + } + return check_error(res, errInfo); +#endif +} + +/***************************************************************************/ + +int +efile_rmdir(Efile_error* errInfo, /* Where to return error codes. */ + char* name) /* Name of directory to delete. */ +{ + if (rmdir(name) == 0) { + return 1; + } + if (errno == ENOTEMPTY) { + errno = EEXIST; + } + if (errno == EEXIST || errno == EINVAL) { + int saved_errno = errno; + struct stat file_stat; + struct stat cwd_stat; + + if(stat(name, &file_stat) != 0) { + errno = ENOENT; + return check_error(-1, errInfo); + } + /* + * The error code might be wrong if this is the current directory. + */ + if (stat(name, &file_stat) == 0 && stat(".", &cwd_stat) == 0 && + file_stat.st_ino == cwd_stat.st_ino && + file_stat.st_dev == cwd_stat.st_dev) { + saved_errno = EACCES; + } + errno = saved_errno; + } + return check_error(-1, errInfo); +} + +/***************************************************************************/ + +int +efile_delete_file(Efile_error* errInfo, /* Where to return error codes. */ + char* name) /* Name of file to delete. */ +{ + struct stat statbuf; + + if (stat(name, &statbuf) >= 0) { + /* Do not let unlink() remove directories */ + if (ISDIR(statbuf)) { + errno = EPERM; + return check_error(-1, errInfo); + } + + if (unlink(name) == 0) { + return 1; + } + + if (errno == EISDIR) { + errno = EPERM; + return check_error(-1, errInfo); + } + } + else { + if (errno == EINVAL) { + errno = ENOENT; + return check_error(-1, errInfo); + } + } + return check_error(-1, errInfo); +} + +/* + *--------------------------------------------------------------------------- + * + * Changes the name of an existing file or directory, from src to dst. + * If src and dst refer to the same file or directory, does nothing + * and returns success. Otherwise if dst already exists, it will be + * deleted and replaced by src subject to the following conditions: + * If src is a directory, dst may be an empty directory. + * If src is a file, dst may be a file. + * In any other situation where dst already exists, the rename will + * fail. + * + * Results: + * If the directory was successfully created, returns 1. + * Otherwise the return value is 0 and errno is set to + * indicate the error. Some possible values for errno are: + * + * EACCES: src or dst parent directory can't be read and/or written. + * EEXIST: dst is a non-empty directory. + * EINVAL: src is a root directory or dst is a subdirectory of src. + * EISDIR: dst is a directory, but src is not. + * ENOENT: src doesn't exist, or src or dst is "". + * ENOTDIR: src is a directory, but dst is not. + * EXDEV: src and dst are on different filesystems. + * + * Side effects: + * The implementation of rename may allow cross-filesystem renames, + * but the caller should be prepared to emulate it with copy and + * delete if errno is EXDEV. + * + *--------------------------------------------------------------------------- + */ + +int +efile_rename(Efile_error* errInfo, /* Where to return error codes. */ + char* src, /* Original name. */ + char* dst) /* New name. */ +{ + + /* temporary fix AFM does not recognize ./<file name> + * in destination remove pending on adaption of AFM fix + */ + + char *dot_str; + if (dst != NULL) { + dot_str = strchr(dst, '.'); + if (dot_str && dot_str == dst && dot_str[1] == '/') { + dst = dst+2; + } + } + + if (rename(src, dst) == 0) { + return 1; + } + if (errno == ENOTEMPTY) { + errno = EEXIST; + } + if (errno == EINVAL) { + struct stat file_stat; + + if (stat(dst, &file_stat)== 0) { + if (ISDIR(file_stat)) { + errno = EISDIR; + } + else if (ISREG(file_stat)) { + errno = ENOTDIR; + } + else { + errno = EINVAL; + } + } + else { + errno = EINVAL; + } + } + + if (strcmp(src, "/") == 0) { + errno = EINVAL; + } + return check_error(-1, errInfo); +} + +/***************************************************************************/ + +int +efile_chdir(Efile_error* errInfo, /* Where to return error codes. */ + char* name) /* Name of directory to make current. */ +{ + return check_error(chdir(name), errInfo); +} + +/***************************************************************************/ + +int +efile_getdcwd(Efile_error* errInfo, /* Where to return error codes. */ + int drive, /* 0 - current, 1 - A, 2 - B etc. */ + char* buffer, /* Where to return the current + directory. */ + size_t size) /* Size of buffer. */ +{ + if (drive == 0) { + if (getcwd(buffer, size) == NULL) + return check_error(-1, errInfo); + + return 1; + } + + /* + * Drives other than 0 is not supported on Unix. + */ + + errno = ENOTSUP; + return check_error(-1, errInfo); +} + +/***************************************************************************/ + +int +efile_readdir(Efile_error* errInfo, /* Where to return error codes. */ + char* name, /* Name of directory to open. */ + EFILE_DIR_HANDLE* p_dir_handle, /* Pointer to directory + handle of + open directory.*/ + char* buffer, /* Pointer to buffer for + one filename. */ + size_t *size) /* in-out Size of buffer, length + of name. */ +{ + DIR *dp; /* Pointer to directory structure. */ + struct dirent* dirp; /* Pointer to directory entry. */ + + /* + * If this is the first call, we must open the directory. + */ + + if (*p_dir_handle == NULL) { + dp = opendir(name); + if (dp == NULL) + return check_error(-1, errInfo); + *p_dir_handle = (EFILE_DIR_HANDLE) dp; + } + + /* + * Retrieve the name of the next file using the directory handle. + */ + + dp = *((DIR **)((void *)p_dir_handle)); + for (;;) { + dirp = readdir(dp); + if (dirp == NULL) { + closedir(dp); + return 0; + } + if (IS_DOT_OR_DOTDOT(dirp->d_name)) + continue; + buffer[0] = '\0'; + strncat(buffer, dirp->d_name, (*size)-1); + *size = strlen(dirp->d_name); + return 1; + } +} + +/***************************************************************************/ + +int +efile_openfile(Efile_error* errInfo, /* Where to return error codes. */ + char* name, /* Name of directory to open. */ + int flags, /* Flags to user for opening. */ + int* pfd, /* Where to store the file + descriptor. */ + Sint64 *pSize) /* Where to store the size of the + file. */ +{ + struct stat statbuf; + int fd; + int mode; /* Open mode. */ + + if (stat(name, &statbuf) >= 0 && !ISREG(statbuf)) { + errno = EISDIR; + return check_error(-1, errInfo); + } + + switch (flags & (EFILE_MODE_READ|EFILE_MODE_WRITE)) { + case EFILE_MODE_READ: + mode = O_RDONLY; + break; + case EFILE_MODE_WRITE: + if (flags & EFILE_NO_TRUNCATE) + mode = O_WRONLY | O_CREAT; + else + mode = O_WRONLY | O_CREAT | O_TRUNC; + break; + case EFILE_MODE_READ_WRITE: + mode = O_RDWR | O_CREAT; + break; + default: + errno = EINVAL; + return check_error(-1, errInfo); + } + + + if (flags & EFILE_MODE_APPEND) { + mode &= ~O_TRUNC; + mode |= O_APPEND; + } + + if (flags & EFILE_MODE_EXCL) { + mode |= O_EXCL; + } + + fd = open(name, mode, FILE_MODE); + + if (!check_error(fd, errInfo)) + return 0; + + *pfd = fd; + if (pSize) { + *pSize = statbuf.st_size; + } + return 1; +} + +/***************************************************************************/ + +int +efile_may_openfile(Efile_error* errInfo, char *name) { + struct stat statbuf; /* Information about the file */ + int result; + + result = stat(name, &statbuf); + if (!check_error(result, errInfo)) + return 0; + if (!ISREG(statbuf)) { + errno = EISDIR; + return check_error(-1, errInfo); + } + return 1; +} + +/***************************************************************************/ + +void +efile_closefile(int fd) +{ + if (l_find_local_fd(fd) != NULL) { + l_remove_local_fd(fd); + } + close(fd); +} + +/***************************************************************************/ + +int +efile_fdatasync(Efile_error *errInfo, /* Where to return error codes. */ + int fd) /* File descriptor for file to sync data. */ +{ + return efile_fsync(errInfo, fd); +} + +/***************************************************************************/ + +int +efile_fsync(Efile_error *errInfo, /* Where to return error codes. */ + int fd) /* File descriptor for file to sync. */ +{ + return check_error(fsync(fd), errInfo); +} + +/***************************************************************************/ + +int +efile_fileinfo(Efile_error* errInfo, Efile_info* pInfo, + char* name, int info_for_link) +{ + struct stat statbuf; /* Information about the file */ + int result; + + result = stat(name, &statbuf); + if (!check_error(result, errInfo)) { + return 0; + } + +#if SIZEOF_OFF_T == 4 + pInfo->size_high = 0; +#else + pInfo->size_high = (Uint32)(statbuf.st_size >> 32); +#endif + pInfo->size_low = (Uint32)statbuf.st_size; + +#ifdef NO_ACCESS + /* Just look at read/write access for owner. */ + + pInfo->access = ((statbuf.st_mode >> 6) & 07) >> 1; + +#else + pInfo->access = FA_NONE; + if (access(name, R_OK) == 0) + pInfo->access |= FA_READ; + if (access(name, W_OK) == 0) + pInfo->access |= FA_WRITE; + +#endif + + if (ISDEV(statbuf)) + pInfo->type = FT_DEVICE; + else if (ISDIR(statbuf)) + pInfo->type = FT_DIRECTORY; + else if (ISREG(statbuf)) + pInfo->type = FT_REGULAR; + else if (ISLNK(statbuf)) + pInfo->type = FT_SYMLINK; + else + pInfo->type = FT_OTHER; + + pInfo->accessTime = statbuf.st_atime; + pInfo->modifyTime = statbuf.st_mtime; + pInfo->cTime = statbuf.st_ctime; + + pInfo->mode = statbuf.st_mode; + pInfo->links = statbuf.st_nlink; + pInfo->major_device = statbuf.st_dev; + pInfo->inode = statbuf.st_ino; + pInfo->uid = statbuf.st_uid; + pInfo->gid = statbuf.st_gid; + + return 1; +} + +/***************************************************************************/ + +int +efile_write_info(Efile_error *errInfo, Efile_info *pInfo, char *name) +{ + /* + * On some systems chown will always fail for a non-root user unless + * POSIX_CHOWN_RESTRICTED is not set. Others will succeed as long as + * you don't try to chown a file to someone besides youself. + */ + if (pInfo->mode != -1) { + mode_t newMode = pInfo->mode & (S_ISUID | S_ISGID | + S_IRWXU | S_IRWXG | S_IRWXO); + if (chmod(name, newMode)) { + newMode &= ~(S_ISUID | S_ISGID); + if (chmod(name, newMode)) { + return check_error(-1, errInfo); + } + } + } + + return 1; +} + +/***************************************************************************/ + +int +efile_write(Efile_error* errInfo, /* Where to return error codes. */ + int flags, /* Flags given when file was + opened. */ + int fd, /* File descriptor to write to. */ + char* buf, /* Buffer to write. */ + size_t count) /* Number of bytes to write. */ +{ + ssize_t written; /* Bytes written in last operation. */ + struct fd_data *fd_data; + + if ((fd_data = l_find_local_fd(fd)) != NULL) { + if (L_FD_IS_VALID(fd_data)) { + /* we are beyond eof and need to pad*/ + if (l_pad_file(fd_data, L_FD_CUR(fd_data)) < 0) { + return check_error(-1, errInfo); + } + } + } + + while (count > 0) { + if ((written = write(fd, buf, count)) < 0) { + if (errno != EINTR) { + return check_error(-1, errInfo); + } + else { + written = 0; + } + } + ASSERT(written <= count); + buf += written; + count -= written; + } + return 1; +} + +/***************************************************************************/ + +int +efile_writev(Efile_error* errInfo, /* Where to return error codes */ + int flags, /* Flags given when file was + * opened */ + int fd, /* File descriptor to write to */ + SysIOVec* iov, /* Vector of buffer structs. + * The structs may be changed i.e. + * due to incomplete writes */ + int iovcnt) /* Number of structs in vector */ +{ + struct fd_data *fd_data; + int cnt = 0; /* Buffers so far written */ + + ASSERT(iovcnt >= 0); + if ((fd_data = l_find_local_fd(fd)) != NULL) { + if (L_FD_IS_VALID(fd_data)) { + /* we are beyond eof and need to pad*/ + if (l_pad_file(fd_data, L_FD_CUR(fd_data)) < 0) { + return check_error(-1, errInfo); + } + } + } + while (cnt < iovcnt) { + if ((! iov[cnt].iov_base) || (iov[cnt].iov_len <= 0)) { + /* Empty buffer - skip */ + cnt++; + } + else { /* Non-empty buffer */ + ssize_t w; /* Bytes written in this call */ + do { + w = write(fd, iov[cnt].iov_base, iov[cnt].iov_len); + } while (w < 0 && errno == EINTR); + + ASSERT(w <= iov[cnt].iov_len || w == -1); + + if (w < 0) { + return check_error(-1, errInfo); + } + /* Move forward to next buffer to write */ + for (; cnt < iovcnt && w > 0; cnt++) { + if (iov[cnt].iov_base && iov[cnt].iov_len > 0) { + if (w < iov[cnt].iov_len) { + /* Adjust the buffer for next write */ + iov[cnt].iov_len -= w; + iov[cnt].iov_base += w; + w = 0; + break; + } + else { + w -= iov[cnt].iov_len; + } + } + } + ASSERT(w == 0); + } /* else Non-empty buffer */ + } /* while (cnt< iovcnt) */ + return 1; +} + +/***************************************************************************/ + +int +efile_read(Efile_error* errInfo, /* Where to return error codes. */ + int flags, /* Flags given when file was opened. */ + int fd, /* File descriptor to read from. */ + char* buf, /* Buffer to read into. */ + size_t count, /* Number of bytes to read. */ + size_t *pBytesRead) /* Where to return number of + bytes read. */ +{ + ssize_t n; + struct fd_data *fd_data; + + if ((fd_data = l_find_local_fd(fd)) != NULL) { + if (L_FD_IS_VALID(fd_data)) { + *pBytesRead = 0; + return 1; + } + } + for (;;) { + if ((n = read(fd, buf, count)) >= 0) { + break; + } + else if (errno != EINTR) { + return check_error(-1, errInfo); + } + } + if (fd_data != NULL && L_FD_IS_VALID(fd_data)) { + L_FD_INVALIDATE(fd_data); + } + *pBytesRead = (size_t) n; + return 1; +} + +/* pread() and pwrite() */ +/* Some unix systems, notably Solaris has these syscalls */ +/* It is especially nice for i.e. the dets module to have support */ +/* for this, even if the underlying OS dosn't support it, it is */ +/* reasonably easy to work around by first calling seek, and then */ +/* calling read(). */ +/* This later strategy however changes the file pointer, which pread() */ +/* does not do. We choose to ignore this and say that the location */ +/* of the file pointer is undefined after a call to any of the p functions*/ + + +int +efile_pread(Efile_error* errInfo, /* Where to return error codes. */ + int fd, /* File descriptor to read from. */ + Sint64 offset, /* Offset in bytes from BOF. */ + char* buf, /* Buffer to read into. */ + size_t count, /* Number of bytes to read. */ + size_t *pBytesRead) /* Where to return + number of bytes read. */ +{ + int res = efile_seek(errInfo, fd, offset, EFILE_SEEK_SET, NULL); + if (res) { + return efile_read(errInfo, 0, fd, buf, count, pBytesRead); + } else { + return res; + } +} + + +/***************************************************************************/ + +int +efile_pwrite(Efile_error* errInfo, /* Where to return error codes. */ + int fd, /* File descriptor to write to. */ + char* buf, /* Buffer to write. */ + size_t count, /* Number of bytes to write. */ + Sint64 offset) /* where to write it */ +{ + int res = efile_seek(errInfo, fd, offset, EFILE_SEEK_SET, NULL); + + if (res) { + return efile_write(errInfo, 0, fd, buf, count); + } else { + return res; + } +} + +/***************************************************************************/ + +int +efile_seek(Efile_error* errInfo, /* Where to return error codes. */ + int fd, /* File descriptor to do the seek on. */ + Sint64 offset, /* Offset in bytes from the given + origin. */ + int origin, /* Origin of seek (SEEK_SET, SEEK_CUR, + SEEK_END). */ + Sint64 *new_location) /* Resulting new location in file. */ +{ + off_t off, result; + off = (off_t) offset; + + switch (origin) { + case EFILE_SEEK_SET: + origin = SEEK_SET; + break; + case EFILE_SEEK_CUR: + origin = SEEK_CUR; + break; + case EFILE_SEEK_END: + origin = SEEK_END; + break; + default: + errno = EINVAL; + return check_error(-1, errInfo); + } + + if (off != offset) { + errno = EINVAL; + return check_error(-1, errInfo); + } + + errno = 0; + result = lseek(fd, off, origin); + + if (result >= 0) { + l_invalidate_local_fd(fd); + } + + if (result < 0) + { + if (errno == ENOSYS) { + int size, cur_pos; + + if (off < 0) { + errno = EINVAL; + return check_error(-1, errInfo); + } + + cur_pos = lseek(fd, 0, SEEK_CUR); + size = lseek(fd, 0, SEEK_END); + + if (origin == SEEK_SET) { + result = offset; + } + else if (origin == SEEK_CUR) { + result = offset + cur_pos; + } + else if (origin == SEEK_END) { + result = size + offset; + } + + /* sanity check our result */ + if (size > result) { + return check_error(-1, errInfo); + } + + /* store the data localy */ + l_update_local_fd(fd, result, size); + + /* reset the original file position */ + if (origin != SEEK_END) { + lseek(fd, cur_pos, SEEK_SET); + } + } + else if (errno == 0) { + errno = EINVAL; + } + } + + if (new_location) { + *new_location = result; + } + + return 1; +} + +/***************************************************************************/ + +int +efile_truncate_file(Efile_error* errInfo, int *fd, int flags) +{ + off_t offset; + struct fd_data *fd_data; + + if ((fd_data = l_find_local_fd(*fd)) != NULL && L_FD_IS_VALID(fd_data)) { + offset = L_FD_CUR(fd_data); + } + else { + offset = lseek(*fd, 0, SEEK_CUR); + } + + return check_error(((offset >= 0) && + (ftruncate(*fd, offset) == 0)) ? 1 : -1, errInfo); +} + +/***************************************************************************/ + +int +efile_readlink(Efile_error* errInfo, char* name, char* buffer, size_t size) +{ + errno = ENOTSUP; + return check_error(-1, errInfo); +} + +/***************************************************************************/ + +int +efile_altname(Efile_error* errInfo, char* name, char* buffer, size_t size) +{ + errno = ENOTSUP; + return check_error(-1, errInfo); +} + +/***************************************************************************/ + +int +efile_link(Efile_error* errInfo, char* old, char* new) +{ + errno = ENOTSUP; + return check_error(-1, errInfo); +} + +/***************************************************************************/ + +int +efile_symlink(Efile_error* errInfo, char* old, char* new) +{ + errno = ENOTSUP; + return check_error(-1, errInfo); +} + +/***************************************************************************/ + +int +efile_fadvise(Efile_error* errInfo, int fd, Sint64 offset, + Sint64 length, int advise) +{ + return check_error(posix_fadvise(fd, offset, length, advise), errInfo); +} + +/***************************************************************************/ + +static int +call_posix_fallocate(int fd, Sint64 offset, Sint64 length) +{ + int ret; + + /* + * On Linux and Solaris for example, posix_fallocate() returns + * a positive error number on error and it does not set errno. + * On FreeBSD however (9.0 at least), it returns -1 on error + * and it sets errno. + */ + do { + ret = posix_fallocate(fd, (off_t) offset, (off_t) length); + if (ret > 0) { + errno = ret; + ret = -1; + } + } while (ret != 0 && errno == EINTR); + + return ret; +} + +/***************************************************************************/ + +int +efile_fallocate(Efile_error* errInfo, int fd, Sint64 offset, Sint64 length) +{ + return check_error(call_posix_fallocate(fd, offset, length), errInfo); +} diff --git a/erts/emulator/drivers/ose/ose_signal_drv.c b/erts/emulator/drivers/ose/ose_signal_drv.c new file mode 100644 index 0000000000..4929b53856 --- /dev/null +++ b/erts/emulator/drivers/ose/ose_signal_drv.c @@ -0,0 +1,896 @@ +/* + * %CopyrightBegin% + * + * Copyright Ericsson AB 2013-2013. All Rights Reserved. + * + * The contents of this file are subject to the Erlang Public License, + * Version 1.1, (the "License"); you may not use this file except in + * compliance with the License. You should have received a copy of the + * Erlang Public License along with this software. If not, it can be + * retrieved online at http://www.erlang.org/. + * + * Software distributed under the License is distributed on an "AS IS" + * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + * the License for the specific language governing rights and limitations + * under the License. + * + * %CopyrightEnd% + */ +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include "errno.h" +#include "stdio.h" +#include "string.h" +#include "stddef.h" + +#include "sys.h" +#include "erl_driver.h" +#include "ose.h" + + +#ifdef HAVE_OSE_SPI_H +#include "ose_spi/ose_spi.h" +#endif + +#define DEBUG_ATTACH 0 +#define DEBUG_HUNT 0 +#define DEBUG_SEND 0 +#define DEBUG_LISTEN 0 + +#if 0 +#define DEBUGP(FMT,...) printf(FMT, __VA_ARGS__) +#else +#define DEBUGP(FMT,...) +#endif + +#if DEBUG_ATTACH +#define DEBUGP_ATTACH(...) DEBUGP( __VA_ARGS__) +#else +#define DEBUGP_ATTACH(...) +#endif + +#if DEBUG_HUNT +#define DEBUGP_HUNT(...) DEBUGP( __VA_ARGS__) +#else +#define DEBUGP_HUNT(...) +#endif + +#if DEBUG_LISTEN +#define DEBUGP_LISTEN(...) DEBUGP( __VA_ARGS__) +#else +#define DEBUGP_LISTEN(...) +#endif + +#if DEBUG_SEND +#define DEBUGP_SEND(...) DEBUGP( __VA_ARGS__) +#else +#define DEBUGP_SEND(...) +#endif + + +#define DRIVER_NAME "ose_signal_drv" +#define GET_SPID 1 +#define GET_NAME 2 +#define HUNT 100 +#define DEHUNT 101 +#define ATTACH 102 +#define DETACH 103 +#define SEND 104 +#define SEND_W_S 105 +#define LISTEN 106 +#define OPEN 200 + +#define REF_SEGMENT_SIZE 8 + +struct async { + SIGSELECT signo; + ErlDrvTermData port; + ErlDrvTermData proc; + PROCESS spid; + PROCESS target; + Uint32 ref; +}; + +/** + * OSE signals + **/ +union SIGNAL { + SIGSELECT signo; + struct async async; +}; + +/** + * The driver's context + **/ +typedef struct _driver_context { + ErlDrvPort port; + PROCESS spid; + ErlDrvEvent perm_events[2]; + ErlDrvEvent *events; + Uint32 event_cnt; + Uint32 ref; + Uint32 *outstanding_refs; + Uint32 outstanding_refs_max; + Uint32 outstanding_refs_cnt; +} driver_context_t; + +/** + * Global variables + **/ +static ErlDrvTermData a_ok; +static ErlDrvTermData a_error; +static ErlDrvTermData a_enomem; +static ErlDrvTermData a_enoent; +static ErlDrvTermData a_badarg; +static ErlDrvTermData a_mailbox_up; +static ErlDrvTermData a_mailbox_down; +static ErlDrvTermData a_ose_drv_reply; +static ErlDrvTermData a_message; +static PROCESS proxy_proc; + + +/** + * Serialize/unserialize unsigned 32-bit values + **/ +static char *put_u32(unsigned int value, char *ptr) { + *ptr++ = (value & 0xff000000) >> 24; + *ptr++ = (value & 0x00ff0000) >> 16; + *ptr++ = (value & 0x0000ff00) >> 8; + *ptr++ = (value & 0xff); + + return ptr; +} + +static unsigned int get_u32(char *ptr) { + unsigned int result = 0; + result += (ptr[0] & 0xff) << 24; + result += (ptr[1] & 0xff) << 16; + result += (ptr[2] & 0xff) << 8; + result += (ptr[3] & 0xff); + + return result; +} + + +/* Stolen from efile_drv.c */ + +/* 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) ev_get_char(ev, p ,pp, qp) +static int +ev_get_char(ErlIOVec *ev, char *p, int *pp, int *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) = *(pp)+1; + else { + (*(qp))++; + *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) ev_get_uint32(ev,(Uint32*)(p),pp,qp) +static int +ev_get_uint32(ErlIOVec *ev, Uint32 *p, int *pp, int *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) = *(pp)+4; + else { + (*(qp))++; + *pp = 0; + } + return !0; + } + return 0; +} + +/** + * Convinience macros + **/ +#define send_response(port,output) erl_drv_send_term(driver_mk_port(port),\ + driver_caller(port), output, sizeof(output) / sizeof(output[0])); + +void iov_memcpy(void *dest,ErlIOVec *ev,int ind,int off); +void iov_memcpy(void *dest,ErlIOVec *ev,int ind,int off) { + int i; + memcpy(dest,ev->iov[ind].iov_base+off,ev->iov[ind].iov_len-off); + for (i = ind+1; i < ev->vsize; i++) + memcpy(dest,ev->iov[i].iov_base,ev->iov[i].iov_len); +} + +/** + * Reference handling + **/ + +static int add_reference(driver_context_t *ctxt, Uint32 ref) { + + /* + * Premature optimizations may be evil, but they sure are fun. + */ + + if (ctxt->outstanding_refs == NULL) { + /* First ref to be ignored */ + ctxt->outstanding_refs = driver_alloc(REF_SEGMENT_SIZE*sizeof(Uint32)); + if (!ctxt->outstanding_refs) + return 1; + + memset(ctxt->outstanding_refs,0,REF_SEGMENT_SIZE*sizeof(Uint32)); + ctxt->outstanding_refs_max += REF_SEGMENT_SIZE; + ctxt->outstanding_refs[ctxt->outstanding_refs_cnt++] = ref; + } else if (ctxt->outstanding_refs_cnt == ctxt->outstanding_refs_max) { + /* Expand ref array */ + Uint32 *new_array; + ctxt->outstanding_refs_max += REF_SEGMENT_SIZE; + new_array = driver_realloc(ctxt->outstanding_refs, + ctxt->outstanding_refs_max*sizeof(Uint32)); + + if (!new_array) { + ctxt->outstanding_refs_max -= REF_SEGMENT_SIZE; + return 1; + } + + ctxt->outstanding_refs = new_array; + + memset(ctxt->outstanding_refs+ctxt->outstanding_refs_cnt,0, + REF_SEGMENT_SIZE*sizeof(Uint32)); + ctxt->outstanding_refs[ctxt->outstanding_refs_cnt++] = ref; + + } else { + /* Find an empty slot: + * First we try current index, + * then we scan for a slot. + */ + if (!ctxt->outstanding_refs[ctxt->outstanding_refs_cnt]) { + ctxt->outstanding_refs[ctxt->outstanding_refs_cnt++] = ref; + } else { + int i; + ASSERT(ctxt->outstanding_refs_cnt < ctxt->outstanding_refs_max); + for (i = 0; i < ctxt->outstanding_refs_max; i++) + if (!ctxt->outstanding_refs[i]) + break; + ASSERT(ctxt->outstanding_refs[i] == 0); + ctxt->outstanding_refs[i] = ref; + ctxt->outstanding_refs_cnt++; + } + } + return 0; +} + +/* Return 0 if removed, 1 if does not exist, */ +static int remove_reference(driver_context_t *ctxt, Uint32 ref) { + int i,j; + + if (ctxt->outstanding_refs_max == 0 && ctxt->outstanding_refs_cnt == 0) { + ASSERT(ctxt->outstanding_refs == NULL); + return 1; + } + + for (i = 0; i < ctxt->outstanding_refs_max; i++) { + if (ctxt->outstanding_refs[i] == ref) { + ctxt->outstanding_refs[i] = 0; + ctxt->outstanding_refs_cnt--; + i = -1; + break; + } + } + + if (i != -1) + return 1; + + if (ctxt->outstanding_refs_cnt == 0) { + driver_free(ctxt->outstanding_refs); + ctxt->outstanding_refs = NULL; + ctxt->outstanding_refs_max = 0; + } else if (ctxt->outstanding_refs_cnt == (ctxt->outstanding_refs_max - REF_SEGMENT_SIZE)) { + Uint32 *new_array; + for (i = 0, j = 0; i < ctxt->outstanding_refs_cnt; i++) { + if (ctxt->outstanding_refs[i] == 0) { + for (j = i+1; j < ctxt->outstanding_refs_max; j++) + if (ctxt->outstanding_refs[j]) { + ctxt->outstanding_refs[i] = ctxt->outstanding_refs[j]; + ctxt->outstanding_refs[j] = 0; + break; + } + } + } + ctxt->outstanding_refs_max -= REF_SEGMENT_SIZE; + new_array = driver_realloc(ctxt->outstanding_refs, + ctxt->outstanding_refs_max*sizeof(Uint32)); + if (!new_array) { + ctxt->outstanding_refs_max += REF_SEGMENT_SIZE; + return 2; + } + + ctxt->outstanding_refs = new_array; + + } + + return 0; +} + +/** + * The OSE proxy process. This only handles ERTS_SIGNAL_OSE_DRV_ATTACH. + * The process is needed because signals triggered by attach ignore + * redir tables. + * + * We have one global proxy process to save memory. An attempt to make each + * port phantom into a proxy was made, but that used way to much memory. + */ +static OS_PROCESS(driver_proxy_process) { + SIGSELECT sigs[] = {1,ERTS_SIGNAL_OSE_DRV_ATTACH}; + PROCESS master = 0; + + while (1) { + union SIGNAL *sig = receive(sigs); + + if (sig->signo == ERTS_SIGNAL_OSE_DRV_ATTACH) { + + /* The first message is used to determine who to send messages to. */ + if (master == 0) + master = sender(&sig); + + if (sig->async.target == 0) { + PROCESS from = sender(&sig); + restore(sig); + DEBUGP_ATTACH("0x%x: got attach 0x%x, sending to 0x%x\n", + current_process(),from,master); + sig->async.target = from; + send(&sig,master); + } else { + PROCESS target = sig->async.target; + restore(sig); + sig->async.target = 0; + DEBUGP_ATTACH("0x%x: doing attach on 0x%x\n",current_process(),target); + attach(&sig,target); + } + } + } +} + + +/** + * Init routine for the driver + **/ +static int drv_init(void) { + + a_ok = driver_mk_atom("ok"); + a_error = driver_mk_atom("error"); + a_enomem = driver_mk_atom("enomem"); + a_enoent = driver_mk_atom("enoent"); + a_badarg = driver_mk_atom("badarg"); + a_mailbox_up = driver_mk_atom("mailbox_up"); + a_mailbox_down = driver_mk_atom("mailbox_down"); + a_ose_drv_reply = driver_mk_atom("ose_drv_reply"); + a_message = driver_mk_atom("message"); + + proxy_proc = create_process(get_ptype(current_process()), + "ose_signal_driver_proxy", + driver_proxy_process, 10000, + get_pri(current_process()), + 0, 0, NULL, 0, 0); + +#ifdef DEBUG + efs_clone(proxy_proc); +#endif + start(proxy_proc); + + return 0; +} + +/* Signal resolution callback */ +static ErlDrvOseEventId resolve_signal(union SIGNAL* osig) { + union SIGNAL *sig = osig; + if (sig->signo == ERTS_SIGNAL_OSE_DRV_HUNT || + sig->signo == ERTS_SIGNAL_OSE_DRV_ATTACH) { + return sig->async.spid; + } + DEBUGP("%p: Got signal %d sent to %p from 0x%p\n", + current_process(),sig->signo,addressee(&sig),sender(&sig)); + return addressee(&sig); +} + + +/** + * Start routine for the driver + **/ +static ErlDrvData drv_start(ErlDrvPort port, char *command) +{ + driver_context_t *ctxt = driver_alloc(sizeof(driver_context_t)); + + ctxt->perm_events[0] = NULL; + ctxt->perm_events[1] = NULL; + + ctxt->spid = 0; + ctxt->port = port; + ctxt->event_cnt = 0; + ctxt->events = NULL; + ctxt->ref = 0; + ctxt->outstanding_refs = NULL; + ctxt->outstanding_refs_max = 0; + ctxt->outstanding_refs_cnt = 0; + + + /* Set the communication protocol to Erlang to be binary */ + set_port_control_flags(port, PORT_CONTROL_FLAG_BINARY); + + /* Everything ok */ + return (ErlDrvData)ctxt; +} + +/** + * Stop routine for the driver + **/ +static void drv_stop(ErlDrvData driver_data) +{ + driver_context_t *ctxt = (driver_context_t *)driver_data; + int i; + + /* HUNT + ATTACH */ + if (ctxt->perm_events[0]) + driver_select(ctxt->port, ctxt->perm_events[0], + ERL_DRV_USE|ERL_DRV_READ, 0); + if (ctxt->perm_events[1]) + driver_select(ctxt->port, ctxt->perm_events[1], + ERL_DRV_USE|ERL_DRV_READ, 0); + + for (i = 0; i < ctxt->event_cnt; i++) { + driver_select(ctxt->port, ctxt->events[i], ERL_DRV_USE|ERL_DRV_READ, 0); + } + + if (ctxt->spid != 0) + kill_proc(ctxt->spid); + DEBUGP("0x%x: stopped\n",ctxt->spid); + if (ctxt->events) + driver_free(ctxt->events); + if (ctxt->outstanding_refs) + driver_free(ctxt->outstanding_refs); + + driver_free(ctxt); +} + +/** + * Output from Erlang + **/ +static void outputv(ErlDrvData driver_data, ErlIOVec *ev) +{ + driver_context_t *ctxt = (driver_context_t *)driver_data; + int p = 0, q = 1; + char cmd; + + if (! EV_GET_CHAR(ev,&cmd,&p,&q)) { + ErlDrvTermData output[] = { + ERL_DRV_ATOM, a_ose_drv_reply, + ERL_DRV_PORT, driver_mk_port(ctxt->port), + ERL_DRV_ATOM, a_badarg, + ERL_DRV_TUPLE, 3}; + send_response(ctxt->port, output); + return; + } + + /* Command is in the buffer's first byte */ + switch(cmd) { + + case OPEN: { + char *name = driver_alloc(ev->size - 1+1); + struct OS_redir_entry redir[2]; + + redir[0].sig = 1; + redir[0].pid = current_process(); + + iov_memcpy(name,ev,q,p); + name[ev->size-1] = '\0'; + + ctxt->spid = create_process(OS_PHANTOM, name, NULL, 0, + 0, 0, 0, redir, 0, 0); + + DEBUGP("0x%x: open\n",ctxt->spid); + + ctxt->perm_events[1] = + erl_drv_ose_event_alloc(ERTS_SIGNAL_OSE_DRV_ATTACH,(int)ctxt->spid, + resolve_signal, NULL); + driver_select(ctxt->port,ctxt->perm_events[1],ERL_DRV_READ|ERL_DRV_USE,1); + + ctxt->perm_events[0] = + erl_drv_ose_event_alloc(ERTS_SIGNAL_OSE_DRV_HUNT,(int)ctxt->spid, + resolve_signal, NULL); + driver_select(ctxt->port,ctxt->perm_events[0],ERL_DRV_READ|ERL_DRV_USE,1); + + start(ctxt->spid); + + { + ErlDrvTermData output[] = { + ERL_DRV_ATOM, a_ose_drv_reply, + ERL_DRV_PORT, driver_mk_port(ctxt->port), + ERL_DRV_ATOM, a_ok, + ERL_DRV_TUPLE, 3}; + + send_response(ctxt->port, output); + } + + break; + + } + + case ATTACH: + case HUNT: + { + union SIGNAL *sig = alloc(sizeof(union SIGNAL), + cmd == HUNT ? ERTS_SIGNAL_OSE_DRV_HUNT:ERTS_SIGNAL_OSE_DRV_ATTACH); + + sig->async.port = driver_mk_port(ctxt->port); + sig->async.proc = driver_caller(ctxt->port); + sig->async.spid = ctxt->spid; + sig->async.ref = ++ctxt->ref; + + if (add_reference(ctxt,ctxt->ref)) { + ErlDrvTermData output[] = { + ERL_DRV_ATOM, a_ose_drv_reply, + ERL_DRV_PORT, driver_mk_port(ctxt->port), + ERL_DRV_ATOM, a_enomem, + ERL_DRV_TUPLE, 3}; + send_response(ctxt->port, output); + free_buf(&sig); + } else { + ErlDrvTermData output[] = { + ERL_DRV_ATOM, a_ose_drv_reply, + ERL_DRV_PORT, driver_mk_port(ctxt->port), + ERL_DRV_PORT, driver_mk_port(ctxt->port), + ERL_DRV_INT, (ErlDrvUInt)ctxt->ref, + ERL_DRV_TUPLE, 2, + ERL_DRV_TUPLE, 3}; + send_response(ctxt->port, output); + + if (cmd == HUNT) { + char *huntname = driver_alloc(sizeof(char)*((ev->size-1)+1)); + + iov_memcpy(huntname,ev,q,p); + huntname[ev->size-1] = '\0'; + + DEBUGP_HUNT("0x%x: hunt %s -> %u (%u,%u)\n", + ctxt->spid,huntname,ctxt->ref, + ctxt->outstanding_refs_cnt, + ctxt->outstanding_refs_max); + + hunt(huntname, 0, NULL, &sig); + + driver_free(huntname); + } else { + EV_GET_UINT32(ev,&sig->async.target,&p,&q); + DEBUGP_ATTACH("0x%x: attach %u -> %u (%u,%u)\n", + ctxt->spid,sig->async.target, + ctxt->ref, + ctxt->outstanding_refs_cnt, + ctxt->outstanding_refs_max); + + send(&sig,proxy_proc); + } + + } + + break; + } + + case DETACH: + case DEHUNT: + { + + Uint32 ref; + + EV_GET_UINT32(ev,&ref,&p,&q); + if (cmd == DETACH) { + DEBUGP_ATTACH("0x%x: detach %u (%u,%u)\n",ctxt->spid,ref, + ctxt->outstanding_refs_cnt, + ctxt->outstanding_refs_max); + } else { + DEBUGP_HUNT("0x%x: dehunt %u (%u,%u)\n",ctxt->spid,ref, + ctxt->outstanding_refs_cnt, + ctxt->outstanding_refs_max); + } + + if (remove_reference(ctxt,ref)) { + ErlDrvTermData output[] = { + ERL_DRV_ATOM, a_ose_drv_reply, + ERL_DRV_PORT, driver_mk_port(ctxt->port), + ERL_DRV_ATOM, a_error, + ERL_DRV_ATOM, a_enoent, + ERL_DRV_TUPLE, 2, + ERL_DRV_TUPLE, 3}; + + send_response(ctxt->port, output); + } else { + ErlDrvTermData output[] = { + ERL_DRV_ATOM, a_ose_drv_reply, + ERL_DRV_PORT, driver_mk_port(ctxt->port), + ERL_DRV_ATOM, a_ok, + ERL_DRV_TUPLE, 3}; + + send_response(ctxt->port, output); + } + + break; + } + + case SEND: + case SEND_W_S: + { + PROCESS spid; + PROCESS sender; + SIGSELECT signo; + OSBUFSIZE size = ev->size-9; + union SIGNAL *sig; + + EV_GET_UINT32(ev,&spid,&p,&q); + + if (cmd == SEND_W_S) { + EV_GET_UINT32(ev,&sender,&p,&q); + size -= 4; + } else { + sender = ctxt->spid; + } + + EV_GET_UINT32(ev,&signo,&p,&q); + + sig = alloc(size + sizeof(SIGSELECT),signo); + + if (cmd == SEND_W_S) { + DEBUGP_SEND("0x%x: send_w_s(%u,%u,%u)\n",ctxt->spid,spid,signo,sender); + } else { + DEBUGP_SEND("0x%x: send(%u,%u)\n",ctxt->spid,spid,signo); + } + + iov_memcpy(((char *)&sig->signo) + sizeof(SIGSELECT),ev,q,p); + + send_w_s(&sig, sender, spid); + + break; + } + + case LISTEN: + { + int i,j,event_cnt = (ev->size - 1)/4; + ErlDrvEvent *events = NULL; + SIGSELECT signo,tmp_signo; + + if (event_cnt == 0) { + for (i = 0; i < ctxt->event_cnt; i++) + driver_select(ctxt->port,ctxt->events[i],ERL_DRV_READ|ERL_DRV_USE,0); + if (ctxt->events) + driver_free(ctxt->events); + } else { + events = driver_alloc(sizeof(ErlDrvEvent)*event_cnt); + EV_GET_UINT32(ev,&signo,&p,&q); + for (i = 0, j = 0; i < event_cnt || j < ctxt->event_cnt; ) { + + if (ctxt->events) + erl_drv_ose_event_fetch(ctxt->events[j],&tmp_signo,NULL,NULL); + + if (signo == tmp_signo) { + events[i++] = ctxt->events[j++]; + EV_GET_UINT32(ev,&signo,&p,&q); + } else if (signo < tmp_signo || !ctxt->events) { + /* New signal to select on */ + events[i] = erl_drv_ose_event_alloc(signo,(int)ctxt->spid, + resolve_signal, NULL); + driver_select(ctxt->port,events[i++],ERL_DRV_READ|ERL_DRV_USE,1); + EV_GET_UINT32(ev,&signo,&p,&q); + } else { + /* Remove old signal to select on */ + driver_select(ctxt->port,ctxt->events[j++],ERL_DRV_READ|ERL_DRV_USE,0); + } + } + if (ctxt->events) + driver_free(ctxt->events); + } + ctxt->events = events; + ctxt->event_cnt = event_cnt; + + { + ErlDrvTermData output[] = { + ERL_DRV_ATOM, a_ose_drv_reply, + ERL_DRV_PORT, driver_mk_port(ctxt->port), + ERL_DRV_ATOM, a_ok, + ERL_DRV_TUPLE, 3}; + send_response(ctxt->port, output); + } + break; + } + + default: + { + DEBUGP("Warning: 'ose_signal_drv' unknown command '%d'\n", cmd); + break; + } + } +} + +/** + * Handler for when OSE signal arrives + **/ +static void ready_input(ErlDrvData driver_data, ErlDrvEvent event) +{ + driver_context_t *ctxt = (driver_context_t *)driver_data; + union SIGNAL *sig = erl_drv_ose_get_signal(event); + + while (sig != NULL) { + + switch(sig->signo) + { + /* Remote process is available */ + case ERTS_SIGNAL_OSE_DRV_HUNT: + { + const PROCESS spid = sender(&sig); + + if (remove_reference(ctxt,sig->async.ref)) { + DEBUGP_HUNT("0x%x: Got hunt from 0x%x -> %u (CANCELLED) (%u,%u)\n", + ctxt->spid,spid,sig->async.ref, + ctxt->outstanding_refs_cnt, + ctxt->outstanding_refs_max); + /* Already removed by dehunt */ + } else { + ErlDrvTermData reply[] = { + ERL_DRV_ATOM, a_mailbox_up, + ERL_DRV_PORT, sig->async.port, + ERL_DRV_PORT, sig->async.port, + ERL_DRV_UINT, (ErlDrvUInt)sig->async.ref, + ERL_DRV_TUPLE, 2, + ERL_DRV_UINT, (ErlDrvUInt)spid, + ERL_DRV_TUPLE, 4}; + DEBUGP_HUNT("0x%x: Got hunt from 0x%x -> %u (%u,%u)\n", + ctxt->spid,spid,sig->async.ref, + ctxt->outstanding_refs_cnt, + ctxt->outstanding_refs_max); + erl_drv_send_term(sig->async.port, sig->async.proc, reply, + sizeof(reply) / sizeof(reply[0])); + } + break; + } + + /* Remote process is down */ + case ERTS_SIGNAL_OSE_DRV_ATTACH: + { + PROCESS spid = sig->async.target; + + if (remove_reference(ctxt,sig->async.ref)) { + DEBUGP_ATTACH("0x%x: Got attach from 0x%x -> %u (CANCELLED) (%u,%u)\n", + ctxt->spid,spid,sig->async.ref, + ctxt->outstanding_refs_cnt, + ctxt->outstanding_refs_max); + /* Already removed by detach */ + } else { + ErlDrvTermData reply[] = { + ERL_DRV_ATOM, a_mailbox_down, + ERL_DRV_PORT, sig->async.port, + ERL_DRV_PORT, sig->async.port, + ERL_DRV_UINT, sig->async.ref, + ERL_DRV_TUPLE, 2, + ERL_DRV_UINT, (ErlDrvUInt)spid, + ERL_DRV_TUPLE, 4}; + DEBUGP_ATTACH("0x%x: Got attach from 0x%x -> %u (%u,%u)\n", + ctxt->spid,spid,sig->async.ref, + ctxt->outstanding_refs_cnt, + ctxt->outstanding_refs_max); + erl_drv_send_term(sig->async.port, sig->async.proc, reply, + sizeof(reply) / sizeof(reply[0])); + } + break; + } + + /* Received user defined signal */ + default: + { + const PROCESS spid = sender(&sig); + const OSBUFSIZE size = sigsize(&sig) - sizeof(SIGSELECT); + const char *sig_data = ((char *)&sig->signo) + sizeof(SIGSELECT); + + ErlDrvTermData reply[] = { + ERL_DRV_ATOM, a_message, + ERL_DRV_PORT, driver_mk_port(ctxt->port), + ERL_DRV_UINT, (ErlDrvUInt)spid, + ERL_DRV_UINT, (ErlDrvUInt)ctxt->spid, + ERL_DRV_UINT, (ErlDrvUInt)sig->signo, + ERL_DRV_BUF2BINARY, (ErlDrvTermData)sig_data, (ErlDrvUInt)size, + ERL_DRV_TUPLE, 4, + ERL_DRV_TUPLE, 3}; + + DEBUGP_SEND("0x%x: Got 0x%u\r\n", spid, sig->signo); + + erl_drv_output_term(driver_mk_port(ctxt->port), reply, + sizeof(reply) / sizeof(reply[0])); + break; + } + } + + free_buf(&sig); + sig = erl_drv_ose_get_signal(event); + } +} + +/** + * Handler for 'port_control' + **/ +static ErlDrvSSizeT control(ErlDrvData driver_data, unsigned int cmd, + char *buf, ErlDrvSizeT len, + char **rbuf, ErlDrvSizeT rlen) +{ + driver_context_t *ctxt = (driver_context_t *)driver_data; + + switch(cmd) + { + case GET_SPID: + { + const PROCESS spid = ctxt->spid; + put_u32(spid, *rbuf); + return sizeof(PROCESS); + } + +#ifdef HAVE_OSE_SPI_H + case GET_NAME: + { + const PROCESS spid = get_u32(buf); + char *name = (char*)get_pid_info(spid,OSE_PI_NAME); + int n; + if (!name) { + *rbuf = NULL; + return 0; + } + + if (rlen < (n = strlen(name))) { + ErlDrvBinary *bin = driver_alloc_binary(n); + strncpy(bin->orig_bytes,name,n); + *rbuf = (char*)bin; + } else + strncpy(*rbuf,name,n); + free_buf((union SIGNAL**)&name); + + return n; + } +#endif + default: + { + /* Unknown command */ + return (ErlDrvSSizeT)ERL_DRV_ERROR_GENERAL; + break; + } + } +} + +static void stop_select(ErlDrvEvent event, void *reserved) +{ + erl_drv_ose_event_free(event); +} + +/** + * Setup the driver entry for the Erlang runtime + **/ +ErlDrvEntry ose_signal_driver_entry = { + .init = drv_init, + .start = drv_start, + .stop = drv_stop, + .outputv = outputv, + .ready_input = ready_input, + .driver_name = DRIVER_NAME, + .control = control, + .extended_marker = ERL_DRV_EXTENDED_MARKER, + .major_version = ERL_DRV_EXTENDED_MAJOR_VERSION, + .minor_version = ERL_DRV_EXTENDED_MINOR_VERSION, + .driver_flags = ERL_DRV_FLAG_USE_PORT_LOCKING, + .stop_select = stop_select +}; + diff --git a/erts/emulator/drivers/ose/ttsl_drv.c b/erts/emulator/drivers/ose/ttsl_drv.c new file mode 100644 index 0000000000..8af2ce6af3 --- /dev/null +++ b/erts/emulator/drivers/ose/ttsl_drv.c @@ -0,0 +1,68 @@ +/* + * %CopyrightBegin% + * + * Copyright Ericsson AB 1996-2013. All Rights Reserved. + * + * The contents of this file are subject to the Erlang Public License, + * Version 1.1, (the "License"); you may not use this file except in + * compliance with the License. You should have received a copy of the + * Erlang Public License along with this software. If not, it can be + * retrieved online at http://www.erlang.org/. + * + * Software distributed under the License is distributed on an "AS IS" + * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + * the License for the specific language governing rights and limitations + * under the License. + * + * %CopyrightEnd% + */ +/* + * Stub tty driver because group/user depend on this. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include "erl_driver.h" + +static int ttysl_init(void); +static ErlDrvData ttysl_start(ErlDrvPort, char*); + +/* Define the driver table entry. */ +struct erl_drv_entry ttsl_driver_entry = { + ttysl_init, + ttysl_start, + NULL, + NULL, + NULL, + NULL, + "tty_sl", + NULL, + NULL, + NULL, + NULL, /* timeout */ + NULL, /* outputv */ + NULL, /* ready_async */ + NULL, /* flush */ + NULL, /* call */ + NULL, /* event */ + ERL_DRV_EXTENDED_MARKER, + ERL_DRV_EXTENDED_MAJOR_VERSION, + ERL_DRV_EXTENDED_MINOR_VERSION, + 0, /* ERL_DRV_FLAGs */ + NULL, + NULL, /* process_exit */ + NULL +}; + + +static int ttysl_init(void) +{ + return 0; +} + +static ErlDrvData ttysl_start(ErlDrvPort port, char* buf) +{ + return ERL_DRV_ERROR_GENERAL; +} |