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Create the /dev/sys/block/by-name/zoned_device symbolic link

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This link will be used to change the sysfs attributes of the zoned block
device from an .rc file.

Bug: 335708738
Change-Id: I99f74c121e7d9da404c0564860c03ac1efe6c6d8
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
This commit is contained in:
Bart Van Assche 2024-05-23 11:20:07 -07:00 committed by Bart Van Assche
parent 7bbb008d57
commit 262f1e8096
1 changed files with 12 additions and 1 deletions
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13
init/devices.cpp
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@ -435,6 +435,7 @@ std::vector<std::string> DeviceHandler::GetBlockDeviceSymlinks(const Uevent& uev
if (ReadFileToString("/sys/class/block/" + uevent.device_name + "/queue/zoned", &model) &&
!StartsWith(model, "none")) {
links.emplace_back("/dev/block/by-name/zoned_device");
links.emplace_back("/dev/sys/block/by-name/zoned_device");
}
auto last_slash = uevent.path.rfind('/');
@ -483,11 +484,21 @@ void DeviceHandler::HandleDevice(const std::string& action, const std::string& d
// event.
if (action == "add" || (action == "change" && StartsWith(devpath, "/dev/block/dm-"))) {
for (const auto& link : links) {
std::string target;
if (StartsWith(link, "/dev/block/")) {
target = devpath;
} else if (StartsWith(link, "/dev/sys/block/")) {
target = "/sys/class/block/" + Basename(devpath);
} else {
LOG(ERROR) << "Unrecognized link type: " << link;
continue;
}
if (!mkdir_recursive(Dirname(link), 0755)) {
PLOG(ERROR) << "Failed to create directory " << Dirname(link);
}
if (symlink(devpath.c_str(), link.c_str())) {
if (symlink(target.c_str(), link.c_str())) {
if (errno != EEXIST) {
PLOG(ERROR) << "Failed to symlink " << devpath << " to " << link;
} else if (std::string link_path;