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lwext4_fs: handle WRITE_TIMESTAMP packet

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This commits adds handling for the 'WRITE_TIMESTAMP' packet, which is
used to update the modification time and additionally returns the
proper rwx information for nodes.

Fixes #201.
This commit is contained in:
Josef Söntgen
2020-02-26 16:36:58 +01:00
committed by Norman Feske
parent 26ec7ca719
commit 0ed545e55a
2 changed files with 30 additions and 2 deletions
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10
src/server/lwext4_fs/main.cc
View File

@@ -102,6 +102,16 @@ class Lwext4_fs::Session_component : public File_system::Session_rpc_object
}
break;
case Packet_descriptor::WRITE_TIMESTAMP:
if (tx_sink()->packet_valid(packet) && (packet.length() <= packet.size())) {
packet.with_timestamp([&] (File_system::Timestamp const time) {
open_node.node().update_modification_time(time);
succeeded = true;
});
}
break;
case Packet_descriptor::CONTENT_CHANGED:
open_node.register_notify(*tx_sink());
/* notify_listeners may bounce the packet back*/

22
src/server/lwext4_fs/node.h
View File

@@ -57,6 +57,15 @@ class Lwext4_fs::Node : public Node_base
}
}
void update_modification_time(Timestamp const time)
{
/* lwext4 only supports 32bit time values */
uint32_t const mtime = time.value > 0 ? (uint32_t)time.value : 0;
/* silently ignore errors */
(void)ext4_mtime_set(name(), mtime);
}
virtual Status status()
{
int err = ext4_raw_inode_fill(_name.base(), &_ino, &_inode);
@@ -76,15 +85,24 @@ class Lwext4_fs::Node : public Node_base
status.size = ext4_inode_get_size(sb, &_inode);
status.inode = _ino;
unsigned int const v = ext4_inode_get_mode(sb, &_inode) & 0xf000;
unsigned int mtime = 0;
(void) ext4_mtime_get(_name.base(), &mtime);
status.modification_time = { mtime };
switch (v) {
unsigned int const mode = ext4_inode_get_mode(sb, &_inode);
unsigned int const type = mode & 0xf000;
switch (type) {
case EXT4_INODE_MODE_DIRECTORY: status.type = Node_type::DIRECTORY; break;
case EXT4_INODE_MODE_SOFTLINK: status.type = Node_type::SYMLINK; break;
case EXT4_INODE_MODE_FILE:
default: status.type = Node_type::CONTINUOUS_FILE; break;
}
status.rwx = { .readable = mode & 0x100,
.writeable = mode & 0x080,
.executable = mode & 0x040,
};
return status;
}