line source
/******************************************************************************
* Flash File System (ffs)
* Idea, design and coding by Mads Meisner-Jensen, mmj@ti.com
*
* ffs public API functions
*
* $Id: ffs.c 1.69.1.24.1.40 Thu, 08 Jan 2004 15:05:23 +0100 tsj $
*
f ******************************************************************************/
#ifndef TARGET
#include "ffs.cfg"
#endif
#if ((TARGET == 1) || (RIV_ENV== 1))
#include "ffs/board/task.h"
#endif
#if (TARGET == 0)
#include <stdlib.h>
#endif
#include <string.h>
#include <limits.h>
#include "ffs/ffs.h"
#include "ffs/board/core.h"
#include "ffs/board/ffstrace.h"
/******************************************************************************
*
******************************************************************************/
extern struct fs_s fs; // defined in core.c
// These dummy defines and struct are only use to simulate FFS on the
// PC. The ones that is used in target are located in task.h
#if (TARGET == 0)
struct ffs_blocking_s {int x; };
#define FFS_BLOCKING_CALL_BEGIN()
int result; \
struct ffs_blocking_s fb;
#define FFS_BLOCKING_CALL_END()
#endif
/******************************************************************************
* Create, Read and Write
******************************************************************************/
req_id_t ffs_file_write_b(const char *pathname, void *src, int size,
ffs_options_t option, T_RV_RETURN *cp,
struct ffs_blocking_s *fb)
{
iref_t i, dir;
char *name;
effs_t error;
int chunk_size, size_remaining, bytes_free;
tw(tr(TR_FUNC, TrApi, "ffs_file_write('%s', 0x%x, %d, %d) ?\n",
pathname, (int) src, size, option));
ttw(ttr(TTrApi, "ffs_file_write('%s', 0x%x, %d, %d) ?" NL,
pathname, (int) src, size, option));
// TASKBEGIN effs_t FILE_WRITE(path=pathname, src=src, size=size, value16=option) iref_t i, dir; char *name; effs_t error; int chunk_size, size_remaining, bytes_free;
if (fs.initerror)
return fs.initerror;
if (size < 0)
return EFFS_INVALID;
ffs_query(Q_BYTES_FREE, &bytes_free);
if (bytes_free < size)
return EFFS_NOSPACE;
chunk_size = (size > fs.chunk_size_max ? fs.chunk_size_max : size);
if ((i = object_lookup(pathname, &name, &dir)) < 0) {
// Object not found, continue like fcreate()
if (i != EFFS_NOTFOUND)
return i;
if (!is_open_option(option, FFS_O_CREATE))
return EFFS_NOTFOUND;
journal_begin(0);
if ((dir = object_create(name, src, chunk_size, -dir)) < 0)
return dir;
journal_end(OT_FILE);
}
else {
// Object found, continue like fupdate()
if (is_open_option(option, (FFS_O_CREATE))
&& is_open_option(option, (FFS_O_EXCL)))
return EFFS_EXISTS;
if (get_fdi(i) >= 0)
return EFFS_LOCKED;
// Even though the ffs architecture allows to have data in
// directory objects, we don't want to complicate matters, so we
// return an error
if (is_object(inode_addr(i), OT_DIR) && !(fs.flags & FS_DIR_DATA)) {
return EFFS_NOTAFILE;
}
if ((i = is_readonly(i, pathname)) < 0)
return i;
// Save the segment (if any) in the global variable because this
// global variable will be updated if the inode is going to be
// relocated if an inode_reclaim() is triggeret by the object_create()
fs.i_backup = segment_next(i);
journal_begin(i);
if ((dir = object_create(name, src, chunk_size, -dir)) < 0)
return dir;
// Do not link child - we are replacing the complete file!
fs.link_child = 0;
journal_end(0);
// If any other segments exist then remove them FIXME: If we get a
// power failure here then the remaining segments wil not be removed
// before inode_reclaim() has been executed
if (fs.i_backup > 0)
if ((error = object_remove(fs.i_backup)) < 0)
return error;
}
// Save dir in fs.i_backup because this will be updated if some of the
// chunks below trigger a inode reclaim!
fs.i_backup = dir;
size_remaining = size - chunk_size;
while (size_remaining > 0) {
chunk_size = (size_remaining > fs.chunk_size_max ?
fs.chunk_size_max : size_remaining);
journal_begin(0);
if ((i = segment_create((char*) src + size - size_remaining,
chunk_size, fs.i_backup)) < 0)
return i;
journal_end(OT_SEGMENT);
size_remaining -= chunk_size;
}
tw(tr_bstat());
return EFFS_OK;
// TASKEND
}
// Note: ffs_fcreate() is deprecated and should not be used. Use
// ffs_file_write(..., FFS_O_CREATE | FFS_O_EXCL) instead.
effs_t ffs_fcreate(const char *pathname, void *src, int size)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_file_write_b(pathname, src, size, FFS_O_CREATE | FFS_O_EXCL,
0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_fcreate_nb(const char *pathname, void *src, int size,
T_RV_RETURN *cp)
{
return ffs_file_write_b(pathname, src, size, FFS_O_CREATE | FFS_O_EXCL,
cp, 0);
}
// Note: ffs_fupdate() is deprecated and should not be used. Use
// ffs_file_write(...,FFS_O_TRUNC) instead.
effs_t ffs_fupdate(const char *pathname, void *src, int size)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_file_write_b(pathname, src, size, FFS_O_TRUNC, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_fupdate_nb(const char *pathname, void *src, int size,
T_RV_RETURN *cp)
{
return ffs_file_write_b(pathname, src, size, FFS_O_TRUNC, cp, 0);
}
// Note: ffs_fwrite() is deprecated and should not be used. Use
// ffs_file_write(...,FFS_O_CREATE | FFS_O_TRUNC) instead.
effs_t ffs_fwrite(const char *pathname, void *src, int size)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_file_write_b(pathname, src, size,
FFS_O_CREATE | FFS_O_TRUNC, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_fwrite_nb(const char *pathname, void *src, int size,
T_RV_RETURN *cp)
{
return ffs_file_write_b(pathname, src, size,
FFS_O_CREATE | FFS_O_TRUNC, cp, 0);
}
effs_t ffs_file_write(const char *pathname, void *src, int size,
ffs_options_t option)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_file_write_b(pathname, src, size, option, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_file_write_nb(const char *pathname, void *src, int size,
ffs_options_t option,
T_RV_RETURN *cp)
{
return ffs_file_write_b(pathname, src, size, option, cp, 0);
}
// Note important: ffs_fread() is deprecated and should not be used. Use
// ffs_file_read() instead.
int ffs_fread(const char *name, void *addr, int size)
{
return ffs_file_read(name, addr, size);
}
int ffs_file_read(const char *name, void *addr, int size)
{
int error;
tw(tr(TR_BEGIN, TrApi, "file_read('%s', 0x%x, %d) {\n",
name, (int) addr, size));
if ((error = ffs_begin()) == EFFS_OK)
{
error = file_read(name, addr, size);
}
tw(tr(TR_END, TrApi, "} %d\n", error));
return ffs_end(error); // number of bytes read
}
/******************************************************************************
* Stat, Symlink, Remove and Rename
******************************************************************************/
effs_t ffs_stat(const char *name, struct stat_s *stat)
{
iref_t i;
tw(tr(TR_FUNC, TrApi, "ffs_stat('%s', ?) ?\n", name));
ttw(ttr(TTrApi, "ffs_stat('%s', ?) ?" NL, name));
if (name == NULL)
return EFFS_BADNAME;
if ((i = ffs_begin()) == EFFS_OK)
{
if ((i = object_stat(name, (struct xstat_s*) stat, 0, 0, 0)) > 0)
i = EFFS_OK;
}
return ffs_end(i);
}
effs_t ffs_lstat(const char *name, struct stat_s *stat)
{
iref_t i;
tw(tr(TR_FUNC, TrApi, "ffs_lstat('%s', ?) ?\n", name));
ttw(ttr(TTrApi, "ffs_lstat('%s', ?) ?" NL, name));
if ((i = ffs_begin()) == EFFS_OK) {
if ((i = object_stat(name, (struct xstat_s*)stat, 1, 0, 0)) > 0)
i = EFFS_OK;
}
return ffs_end(i);
}
effs_t ffs_xlstat(const char *name, struct xstat_s *stat)
{
iref_t i;
tw(tr(TR_FUNC, TrApi, "ffs_xlstat('%s', ?) ?\n", name));
ttw(ttr(TTrApi, "ffs_xlstat('%s', ?) ?" NL, name));
if ((i = ffs_begin()) == EFFS_OK) {
if ((i = object_stat(name, stat, 1, 0, 1)) > 0)
i = EFFS_OK;
}
return ffs_end(i);
}
effs_t ffs_fstat(fd_t fdi, struct stat_s *stat)
{
iref_t i;
tw(tr(TR_FUNC, TrApi, "ffs_fstat('%d', ?) ?\n", fdi));
ttw(ttr(TTrApi, "ffs_fstat('%d', ?) ?" NL, fdi));
if ((i = ffs_begin()) == EFFS_OK) {
if ((i = object_stat( 0, (struct xstat_s*) stat, 0, fdi, 0)) > 0)
i = EFFS_OK;
}
return ffs_end(i);
}
req_id_t ffs_symlink_b(const char *pathname, const char *src,
T_RV_RETURN *cp, struct ffs_blocking_s *fb)
{
iref_t i, dir;
char *name;
int size;
tw(tr(TR_FUNC, TrApi, "ffs_symlink('%s', '%s') ?\n", pathname, src));
ttw(ttr(TTrApi, "ffs_symlink('%s', '%s') ?" NL, pathname, src));
// TASKBEGIN effs_t SYMLINK(path=pathname, src=src) iref_t i, dir; int size; char *name;
if (fs.initerror)
return fs.initerror;
if (src == NULL)
return EFFS_BADNAME;
i = object_lookup(pathname, &name, &dir);
if (i > 0)
return EFFS_EXISTS;
if (i != EFFS_NOTFOUND)
return i;
size = ffs_strlen(src) + 1; // include null-terminator
journal_begin(0);
if ((i = object_create(name, src, size, -dir)) < 0)
return i;
journal_end(OT_LINK);
tw(tr_bstat());
return EFFS_OK;
// TASKEND
}
effs_t ffs_symlink(const char *pathname, const char *actualpath)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_symlink_b(pathname, actualpath, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_symlink_nb(const char *pathname, const char *src,
T_RV_RETURN *cp)
{
return ffs_symlink_b(pathname, src, cp, 0);
}
int ffs_readlink(const char *name, char *addr, int size)
{
int error;
tw(tr(TR_FUNC, TrApi, "ffs_readlink('%s')\n", name));
if ((error = ffs_begin()) == EFFS_OK)
{
error = object_read(name, addr, size, 1);
}
return ffs_end(error);
}
req_id_t ffs_remove_b(const char *pathname, T_RV_RETURN *cp,
struct ffs_blocking_s *fb)
{
iref_t i;
tw(tr(TR_FUNC, TrApi, "ffs_remove('%s')\n", pathname));
ttw(ttr(TTrApi, "ffs_remove('%s') ?" NL, pathname));
// TASKBEGIN effs_t REMOVE(path=pathname) iref_t i;
if (fs.initerror)
return fs.initerror;
if ((i = object_lookup_once(pathname, 0, 0)) < 0)
return i;
if (get_fdi(i) >= 0)
return EFFS_LOCKED;
if ((i = is_readonly(i, pathname)) < 0)
return i;
if ((i = object_remove(i)) < 0)
return i;
tw(tr_bstat());
return EFFS_OK;
// TASKEND
}
effs_t ffs_remove(const char *pathname)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_remove_b(pathname, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_remove_nb(const char *pathname, T_RV_RETURN *cp)
{
return ffs_remove_b(pathname, cp, 0);
}
req_id_t ffs_fcontrol_b(const char *pathname, int8 action, int param,
T_RV_RETURN *cp, struct ffs_blocking_s *fb)
{
iref_t i;
tw(tr(TR_FUNC, TrApi, "ffs_fcontrol('%s', %d, 0x%x) ?\n",
pathname, action, param));
ttw(ttr(TTrApi, "ffs_fcontrol('%s', %d, 0x%x) ?" NL,
pathname, action, param));
// TASKBEGIN effs_t FCONTROL(path=pathname, value16=action, size=param) iref_t i;
if (fs.initerror)
return fs.initerror;
if (pathname == NULL)
return EFFS_BADNAME;
if ((i = ffs_strcmp(pathname, "/dev/ffs")) != 0)
{
if ((i = object_lookup_once(pathname, 0, 0)) < 0)
return i;
if ((i = is_readonly(i, pathname)) < 0)
return i;
}
if ((i = object_control(i, action, param)) < 0)
return i;
tw(tr_bstat());
return EFFS_OK;
// TASKEND
}
effs_t ffs_fcontrol(const char *pathname, int8 action, int param)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_fcontrol_b(pathname, action, param, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_fcontrol_nb(const char *pathname, int8 action, int param,
T_RV_RETURN *cp)
{
return ffs_fcontrol_b(pathname, action, param, cp, 0);
}
req_id_t ffs_rename_b(const char *pathname, const char *newname,
T_RV_RETURN *cp, struct ffs_blocking_s *fb)
{
iref_t i, oldi, dir;
char *name;
struct inode_s *ip;
tw(tr(TR_FUNC, TrApi, "ffs_rename('%s', '%s') ?\n", pathname, newname));
ttw(ttr(TTrApi, "ffs_rename('%s', '%s') ?" NL, pathname, newname));
// TASKBEGIN effs_t RENAME(path=pathname, src=newname) iref_t i, oldi, dir; char *name; struct inode_s *ip;
if (fs.initerror)
return fs.initerror;
// pathname MUST exist, not be open and MUST be writable
if ((oldi = object_lookup_once(pathname, 0, 0)) < 0)
return oldi;
if ((oldi = is_readonly(oldi, pathname)) < 0)
return oldi;
if (get_fdi(oldi) >= 0)
return EFFS_LOCKED;
journal_begin(oldi);
if ((i = object_lookup_once(newname, &name, &dir)) < 0) {
if (i != EFFS_NOTFOUND)
return i;
}
else { // newname obj exist
ip = inode_addr(oldi);
if (is_object(ip, OT_FILE)) { // is old obj a file?
if ((i = is_readonly(i, newname)) < 0)
return i;
ip = inode_addr(i);
if (!is_object(ip, OT_FILE)) // newname MUST be a file
return EFFS_NOTAFILE;
fs.journal.repli = i;
}
else
return EFFS_EXISTS;
}
if ((i = object_rename(oldi, name, -dir)) < 0)
return i;
journal_end(0);
tw(tr_bstat());
return EFFS_OK;
// TASKEND
}
effs_t ffs_rename(const char *pathname, const char *newname)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_rename_b(pathname, newname, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_rename_nb(const char *pathname, const char *newname,
T_RV_RETURN *cp)
{
return ffs_rename_b(pathname, newname, cp, 0);
}
/******************************************************************************
* Directory Operations
******************************************************************************/
// All directory operations are more or less similar to unix
// semantics.
req_id_t ffs_mkdir_b(const char *pathname, T_RV_RETURN *cp,
struct ffs_blocking_s *fb)
{
iref_t i, dir;
char *name;
tw(tr(TR_FUNC, TrApi, "ffs_mkdir('%s')\n", pathname));
ttw(ttr(TTrApi, "ffs_mkdir('%s') ?" NL, pathname));
// TASKBEGIN effs_t MKDIR(path=pathname) iref_t i, dir; char *name;
if (fs.initerror)
return fs.initerror;
i = object_lookup(pathname, &name, &dir);
if (i > 0)
return EFFS_EXISTS;
if (i != EFFS_NOTFOUND)
return i;
journal_begin(0);
if ((i = object_create(name, 0, 0, -dir)) < 0)
return i;
journal_end(OT_DIR);
tw(tr_bstat());
return EFFS_OK;
// TASKEND
}
effs_t ffs_mkdir(const char *pathname)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_mkdir_b(pathname, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_mkdir_nb(const char *pathname, T_RV_RETURN *cp)
{
return ffs_mkdir_b(pathname, cp, 0);
}
int ffs_opendir(const char *name, struct dir_s *dir)
{
int i;
tw(tr(TR_FUNC, TrApi, "ffs_opendir('%s', ?)\n", name));
ttw(ttr(TTrApi, "ffs_opendir('%s', ?) ?" NL, name));
if (dir == NULL)
return EFFS_INVALID;
if ((i = ffs_begin()) == EFFS_OK)
{
if ((i = dir_open(name)) >= 0)
{
dir->this = i;
dir->index = i;
// Now count the number of entries in the directory
dir_traverse(-i, (iref_t *) &i);
}
}
return ffs_end(i);
}
int ffs_readdir(struct dir_s *dir, char *name, int size)
{
iref_t i;
tw(tr(TR_BEGIN, TrApi, "ffs_readdir(?, ?, ?) {\n"));
ttw(ttr(TTrApi, "ffs_readdir(?, ?, ?) ?" NL));
if (dir == NULL || name == NULL || size < 0) {
tw(tr(TR_END, TrApi, "} %d\n", EFFS_INVALID));
return EFFS_INVALID;
}
if ((i = ffs_begin()) == EFFS_OK)
{
if ((i = dir_next(dir->this, dir->index, name, size)))
dir->index = i;
}
tw(tr(TR_END, TrApi, "} ('%s') %d\n", name, i));
return ffs_end(i);
}
/******************************************************************************
* Preformat and Format
******************************************************************************/
// Note that we do NOT call ffs_begin() because it will just return
// EFFS_NOFORMAT!
req_id_t ffs_format_b(const char *name, uint16 magic, T_RV_RETURN *cp,
struct ffs_blocking_s *fb)
{
effs_t i;
tw(tr(TR_BEGIN, TrApi, "ffs_format('%s', 0x%x) {\n", name, magic));
ttw(ttr(TTrApi, "ffs_format('%s', 0x%x) ?" NL, name, magic));
// TASKBEGIN effs_t FORMAT(path=name, size=magic) iref_t i;
if (magic != 0x2BAD) {
tw(tr(TR_END, TrApi, "} %d\n", EFFS_INVALID));
return EFFS_INVALID;
}
if (name == NULL) {
name = "/ffs-5.54";
}
if (*name != '/') {
tw(tr(TR_END, TrApi, "} %d\n", EFFS_BADNAME));
return EFFS_BADNAME;
}
if ((i = is_formattable(1)) < 0) {
tw(tr(TR_END, TrApi, "} %d\n", i));
return i;
}
if ((i = fs_format(name)) < 0)
return i;
tw(tr(TR_END, TrApi, "} %d\n", i));
tw(tr_bstat());
return EFFS_OK;
// TASKEND
}
effs_t ffs_format(const char *name, uint16 magic)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_format_b(name, magic, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_format_nb(const char *name, uint16 magic, T_RV_RETURN *cp)
{
return ffs_format_b(name, magic, cp, 0);
}
req_id_t ffs_preformat_b(uint16 magic, T_RV_RETURN *cp,
struct ffs_blocking_s *fb)
{
effs_t i;
tw(tr(TR_BEGIN, TrApi, "ffs_preformat(0x%x) {\n", magic));
ttw(ttr(TTrApi, "ffs_preformat(0x%x) ?" NL, magic));
// TASKBEGIN effs_t PREFORMAT(path="/", size=magic) effs_t i;
if (magic != 0xDEAD) {
tw(tr(TR_END, TrApi, "} %d\n", EFFS_INVALID));
return EFFS_INVALID;
}
if (!ffs_is_modifiable("")) {
tw(tr(TR_END, TrApi, "} %d\n", EFFS_ACCESS));
return EFFS_ACCESS;
}
if ((i = is_formattable(0)) < 0) {
tw(tr(TR_END, TrApi, "} %d\n", i));
return i;
}
if ((i = fs_preformat()) < 0)
return i;
tw(tr(TR_END, TrApi, "} %d\n", i));
tw(tr_bstat());
return EFFS_OK;
// TASKEND
}
effs_t ffs_preformat(uint16 magic)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_preformat_b(magic, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_preformat_nb(uint16 magic, T_RV_RETURN *cp)
{
return ffs_preformat_b(magic, cp, 0);
}
/******************************************************************************
* Open, Read, Write, Close
******************************************************************************/
req_id_t ffs_open_b(const char *pathname, ffs_options_t option,
T_RV_RETURN *cp, struct ffs_blocking_s *fb)
{
iref_t i, dir, dummy;
char *name;
fd_t other_fdi, fdi = 0;
int error;
struct inode_s *ip;
tw(tr(TR_FUNC, TrApi, "ffs_open('%s', 0x%x) ?\n", pathname, option));
ttw(ttr(TTrApi, "ffs_open('%s', 0x%x) ?" NL, pathname, option));
// TASKBEGIN fd_t OPEN(path=pathname, value16=option) iref_t i, dir, dummy; char *name; fd_t other_fdi, fdi = 0; int error; struct inode_s *ip;
if (fs.initerror)
return fs.initerror;
// Minimum one of the flags RD or WR must be specifyed
if (!is_open_option(option, FFS_O_RDONLY) &&
!is_open_option(option, FFS_O_WRONLY))
return EFFS_INVALID;
// RDONLY must not be combined with any other options if not together
// with WR!
if (is_open_option(option, FFS_O_RDONLY) &&
!is_open_option(option, FFS_O_WRONLY))
if (!(option == FFS_O_RDONLY))
return EFFS_INVALID;
for (fdi = 0; fdi < fs.fd_max; fdi++) { // Find free fd
if (fs.fd[fdi].options == 0) {
break;
}
}
if (fdi >= fs.fd_max)
return EFFS_NUMFD; // Too many open files in system
i = object_lookup(pathname, &name, &dir);
if (i < 0 && i != EFFS_NOTFOUND)
return i;
// Open one file several times in RD is okay but only one time in WR
if (i != EFFS_NOTFOUND && (other_fdi = get_fdi(i)) >= 0) {
if (is_open_option(fs.fd[other_fdi].options, FFS_O_WRONLY) ||
is_open_option(option, FFS_O_WRONLY))
return EFFS_LOCKED;
}
// Init default values
fs.fd[fdi].fp = fs.fd[fdi].size = fs.fd[fdi].wfp = fs.fd[fdi].dirty = 0;
if (i == EFFS_NOTFOUND) {
if (is_open_option(option, (FFS_O_CREATE | FFS_O_WRONLY))) {
if ((error = is_filename(name)) < 0)
return error;
// Create segmenthead
journal_begin(0);
if ((i = object_create(name, 0, 0, -dir)) < 0)
return i;
journal_end(OT_FILE);
tw(tr_bstat());
fs.fd[fdi].seghead = i;
}
else
return EFFS_NOTFOUND;
}
else {
if (is_open_option(option, FFS_O_WRONLY)) {
if (is_open_option(option, (FFS_O_CREATE | FFS_O_EXCL)))
return EFFS_EXISTS;
if ((i = is_readonly(i, pathname)) < 0)
return i;
}
ip = inode_addr(i);
if (is_object(ip, OT_DIR))
return EFFS_NOTAFILE;
if (is_open_option(option, FFS_O_TRUNC)) {
// Save the segment (if any) in the global variable because this
// global variable will be updated if the inode is relocated by
// an inode_reclaim() triggeret by object_create()
fs.i_backup = segment_next(i);
// Replace old seghead with a new and remove all old segments
journal_begin(i);
if ((i = object_create(name, 0, 0, -dir)) < 0)
return i;
// Do not link child
fs.link_child = 0;
journal_end(0);
// If any further segments exist then remove them now
if (fs.i_backup > 0)
if ((error = object_remove(fs.i_backup)) < 0)
return error;
tw(tr_bstat());
}
else {
// Get total size of the file.
fs.fd[fdi].size = segfile_seek(i, INT_MAX, &dummy, 0);
}
if (is_open_option(option, FFS_O_APPEND)) {
fs.fd[fdi].fp = fs.fd[fdi].size;
}
}
if (is_open_option(option, FFS_O_WRONLY)) {
#if (TARGET == 1)
if ((fs.fd[fdi].buf = (char *) target_malloc(fs.fd_buf_size)) == 0)
return EFFS_MEMORY;
#else
if ((fs.fd[fdi].buf = malloc(fs.fd_buf_size)) == 0)
return EFFS_MEMORY;
#endif
}
// Save data in file descriptor
fs.fd[fdi].seghead = i;
fs.fd[fdi].options = option;
return fdi + FFS_FD_OFFSET;
// TASKEND
}
fd_t ffs_open(const char *pathname, ffs_options_t option)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_open_b(pathname, option, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_open_nb(const char *pathname, ffs_options_t option,
T_RV_RETURN *cp)
{
return ffs_open_b(pathname, option, cp, 0);
}
req_id_t ffs_close_b(fd_t fdi, T_RV_RETURN *cp, struct ffs_blocking_s *fb)
{
int error;
tw(tr(TR_FUNC, TrApi, "ffs_close(%d) ?\n", fdi));
ttw(ttr(TTrApi, "ffs_close(%d) ?" NL, fdi));
// TASKBEGIN effs_t CLOSE(fdi=fdi) iref_t i; int error;
if (fs.initerror)
return fs.initerror;
fdi -= FFS_FD_OFFSET;
if (!is_fd_valid(fdi))
return EFFS_BADFD;
if (is_open_option(fs.fd[fdi].options, FFS_O_WRONLY )) {
if ((error = datasync(fdi)) < 0)
return error;
#if (TARGET == 1)
target_free(fs.fd[fdi].buf);
#else
free(fs.fd[fdi].buf);
#endif
}
// Clear all data in file descriptor
fs.fd[fdi].seghead = 0;
fs.fd[fdi].options = fs.fd[fdi].fp = 0;
return EFFS_OK;
// TASKEND
}
effs_t ffs_close(fd_t fdi)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_close_b(fdi, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_close_nb(fd_t fdi, T_RV_RETURN *cp)
{
return ffs_close_b( fdi, cp, 0);
}
req_id_t ffs_write_b(fd_t fdi, void *src, int amount,
T_RV_RETURN *cp, struct ffs_blocking_s *fb)
{
effs_t error;
iref_t i;
int size_remaining, fp_offset;
int size, size_done;
offset_t chunk_offset;
tw(tr(TR_BEGIN, TrApi, "ffs_write_b(%d, 0x%x, %d) ?{\n", fdi, src, amount));
ttw(ttr(TTrApi, "ffs_write_b(%d, 0x%x, %d) ?" NL, fdi, src, amount));
// TASKBEGIN int WRITE(fdi=fdi, src=src, size=amount) effs_t error; iref_t i; int size_remaining, fp_offset; int size, size_done; offset_t chunk_offset;
if (fs.initerror)
return fs.initerror;
if (amount < 0 || src == NULL)
return EFFS_INVALID;
fdi -= FFS_FD_OFFSET;
if (!is_fd_valid(fdi))
return EFFS_BADFD;
if (!is_open_option(fs.fd[fdi].options, FFS_O_WRONLY ))
return EFFS_INVALID; // not opened with write flag
// If FFS_O_APPEEND is specified move fp to eof
if (is_open_option(fs.fd[fdi].options, FFS_O_APPEND ))
fs.fd[fdi].fp = fs.fd[fdi].size;
// If fp has been moved outside the write buf (by a read) then flush the
// write buffer.
if (fs.fd[fdi].fp >= (fs.fd[fdi].wfp + fs.chunk_size_max)) {
if ((error = datasync(fdi)) < 0)
return error;
}
size_done = 0;
size_remaining = amount;
do {
if (!fs.fd[fdi].dirty ) {
// Buffer is not dirty so find the chunk that fp points to.
segfile_seek(fs.fd[fdi].seghead, fs.fd[fdi].fp, &i,
&chunk_offset);
if ((fs.fd[fdi].size == fs.fd[fdi].fp &&
chunk_offset == fs.chunk_size_max) || fs.fd[fdi].size == 0 ) {
// End of file and last chunk is full or empty seghead.
fs.fd[fdi].wfp = fs.fd[fdi].size;
fs.fd[fdi].wch = 0; // Create new chunk (not update).
}
else {
// Work on this chunk and update it later by datasyns
segment_read(i, fs.fd[fdi].buf, fs.fd_buf_size, 0);
fs.fd[fdi].wfp = fs.fd[fdi].fp - chunk_offset;
fs.fd[fdi].wch = i;
}
}
fs.fd[fdi].dirty = 1;
fp_offset = fs.fd[fdi].fp - fs.fd[fdi].wfp;
// Fill the buffer to max or just add the rest
size = fs.chunk_size_max - fp_offset;
if (size_remaining <= fs.chunk_size_max - fp_offset)
size = size_remaining;
tw(tr(TR_FUNC, TrApi, "Copy data to buffer (size: %d)\n", size));
memcpy(fs.fd[fdi].buf + fp_offset, (uint8*)src + size_done,
size);
fs.fd[fdi].fp += size;
if (fs.fd[fdi].fp > fs.fd[fdi].size)
fs.fd[fdi].size = fs.fd[fdi].fp;
size_done += size; // FIXME: remove size_done or size_remaining
size_remaining -= size;
// If wrbuf is full (size = chunk_size_max) so create a chunk.
if (fs.fd[fdi].fp >= (fs.fd[fdi].wfp + fs.chunk_size_max)) {
if ((error = datasync(fdi)) < 0)
return error;
}
} while(size_remaining > 0);
tw(tr(TR_END, TrApi, "} %d\n", amount));
return amount;
// TASKEND
}
int ffs_write(fd_t fdi, void *src, int amount)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_write_b(fdi, src, amount, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_write_nb(fd_t fdi, void *src, int amount, T_RV_RETURN *cp)
{
tw(tr(TR_FUNC, TrApi, "ffs_write_nb(%d, 0x%x, %d) ?\n", fdi, src, amount));
return ffs_write_b(fdi, src, amount, cp, 0);
}
int ffs_read(fd_t fdi, void *src, int size)
{
int error;
tw(tr(TR_BEGIN, TrApi, "ffs_read(%d, 0x%x, %d) {\n", fdi, src, size));
ttw(ttr(TTrApi, "ffs_read(%d, 0x%x, %d) ?" NL, fdi, src, size));
if ((error = ffs_begin()) == EFFS_OK)
{
error = stream_read(fdi - FFS_FD_OFFSET, src, size);
}
tw(tr(TR_END, TrApi, "} %d\n", error));
return ffs_end(error); // number of bytes read
}
// The seek function will not allow the file offset to be set beyond the end
// of the existing data in the file or the final offset to be negative.
req_id_t ffs_seek_b(fd_t fdi, int offset, int whence, T_RV_RETURN *cp,
struct ffs_blocking_s *fb)
{
effs_t error;
int fp_new;
tw(tr(TR_FUNC, TrApi, "ffs_seek(%d, %d, %d) ?\n", fdi, offset, whence));
ttw(ttr(TTrApi, "ffs_seek(%d, %d, %d) ?" NL, fdi, offset, whence));
// TASKBEGIN int SEEK(fdi=fdi, size=offset, value16=whence) effs_t error; iref_t i; int fp_new, foffset;
if (fs.initerror)
return fs.initerror;
fdi -= FFS_FD_OFFSET;
if (!is_fd_valid(fdi))
return EFFS_BADFD;
switch(whence) {
case FFS_SEEK_SET:
if (offset < 0 || offset > fs.fd[fdi].size)
return EFFS_INVALID;
fp_new = offset;
break;
case FFS_SEEK_CUR:
if (fs.fd[fdi].fp + offset < 0 ||
fs.fd[fdi].fp + offset > fs.fd[fdi].size)
return EFFS_INVALID;
fp_new = fs.fd[fdi].fp + offset;
break;
case FFS_SEEK_END:
if (offset > 0 || fs.fd[fdi].size < -offset)
return EFFS_INVALID;
fp_new = (offset + fs.fd[fdi].size);
break;
default:
return EFFS_INVALID;
}
if (!is_offset_in_buf(fp_new, fdi))
if ((error = datasync(fdi)) < 0)
return error;
return fs.fd[fdi].fp = fp_new;
// TASKEND
}
int ffs_seek(fd_t fdi, int offset, int whence)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_seek_b(fdi, offset, whence, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_seek_nb(fd_t fdi, int offset, int whence, T_RV_RETURN *cp)
{
return ffs_seek_b(fdi, offset, whence, cp, 0);
}
req_id_t ffs_truncate_b(const char *path, offset_t length, T_RV_RETURN *cp,
struct ffs_blocking_s *fb)
{
tw(tr(TR_FUNC, TrApi, "ffs_truncate('%s', %d) \n", path, length));
ttw(ttr(TTrApi, "ffs_ftruncate('%s', %d) ?" NL, path, length));
// TASKBEGIN effs_t TRUNC(path=path, size=length) iref_t i;
if (fs.initerror)
return fs.initerror;
if (path == NULL)
return EFFS_BADNAME;
return object_truncate(path, -1, length);
// TASKEND
}
effs_t ffs_truncate(const char *path, offset_t length)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_truncate_b(path, length, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_truncate_nb(const char *path, offset_t length, T_RV_RETURN *cp)
{
return ffs_truncate_b(path, length, cp, 0);
}
req_id_t ffs_ftruncate_b(fd_t fdi, offset_t length, T_RV_RETURN *cp,
struct ffs_blocking_s *fb)
{
tw(tr(TR_FUNC, TrApi, "ffs_ftruncate(%d, %d) \n", fdi, length));
ttw(ttr(TTrApi, "ffs_ftruncate(%d, %d) ?" NL, fdi, length));
// TASKBEGIN effs_t FTRUNC(fdi=fdi, size=length) iref_t i;
if (fs.initerror)
return fs.initerror;
return object_truncate(0, fdi - FFS_FD_OFFSET, length);
// TASKEND
}
effs_t ffs_ftruncate(fd_t fdi, offset_t length)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_ftruncate_b(fdi, length, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_ftruncate_nb(fd_t fdi, offset_t length, T_RV_RETURN *cp)
{
return ffs_ftruncate_b(fdi, length, cp, 0);
}
req_id_t ffs_fdatasync_b(fd_t fdi, T_RV_RETURN *cp, struct ffs_blocking_s *fb)
{
tw(tr(TR_FUNC, TrApi, "ffs_fdatasync(%d) \n", fdi));
ttw(ttr(TTrApi, "ffs_fdatasync(%d) ?" NL, fdi));
// TASKBEGIN effs_t FDATASYNC(fdi=fdi) effs_t error;
if (fs.initerror)
return fs.initerror;
return datasync(fdi - FFS_FD_OFFSET);
// TASKEND
}
effs_t ffs_fdatasync(fd_t fdi)
{
FFS_BLOCKING_CALL_BEGIN();
result = ffs_fdatasync_b(fdi, 0, &fb);
FFS_BLOCKING_CALL_END();
return result;
}
req_id_t ffs_fdatasync_nb(fd_t fdi, T_RV_RETURN *cp)
{
return ffs_fdatasync_b(fdi, cp, 0);
}