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AP_Filesystem: add support for downloading raw storage via ftp sysfs

This commit is contained in:
bugobliterator 2021-10-30 13:26:08 +05:30 committed by Andrew Tridgell
parent 6c29eb73d2
commit 528e57c2ae
1 changed files with 17 additions and 1 deletions
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16
libraries/AP_Filesystem/AP_Filesystem_Sys.cpp
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@ -49,6 +49,7 @@ static const SysFileList sysfs_file_list[] = {
#if defined(HAL_CRASH_DUMP_FLASHPAGE)
{"crash_dump.bin"},
#endif
{"storage.bin"},
};
int8_t AP_Filesystem_Sys::file_in_sysfs(const char *fname) {
@ -135,6 +136,16 @@ int AP_Filesystem_Sys::open(const char *fname, int flags)
hal.util->last_crash_dump(*r.str);
}
#endif
if (strcmp(fname, "storage.bin") == 0) {
// we don't want to store the contents of storage.bin
// we read directly from the storage driver
void *ptr = nullptr;
size_t size = 0;
if (hal.storage->get_storage_ptr(ptr, size)) {
r.str->set_buffer((char*)ptr, size, size);
}
}
if (r.str->get_length() == 0) {
errno = r.str->has_failed_allocation()?ENOMEM:ENOENT;
delete r.str;
@ -168,6 +179,7 @@ int32_t AP_Filesystem_Sys::read(int fd, void *buf, uint32_t count)
struct rfile &r = file[fd];
count = MIN(count, r.str->get_length() - r.file_ofs);
memcpy(buf, &r.str->get_string()[r.file_ofs], count);
r.file_ofs += count;
return count;
}
@ -254,6 +266,10 @@ int AP_Filesystem_Sys::stat(const char *pathname, struct stat *stbuf)
}
// give a fixed size for stat. It is too expensive to
// read every file for a directory listing
if (strcmp(pathname_noslash, "storage.bin") == 0) {
stbuf->st_size = HAL_STORAGE_SIZE;
} else {
stbuf->st_size = 100000;
}
return 0;
}