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FileSystem: Port most of the code over to using custodies.

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The current working directory is now stored as a custody. Likewise for a
process executable file. This unbreaks /proc/PID/fd which has not been
working since we made the filesystem bigger.

This still needs a bunch of work, for instance when renaming or removing
a file somewhere, we have to update the relevant custody links.
This commit is contained in:
Andreas Kling 2019-05-30 18:58:59 +02:00
parent 4cb87b1753
commit 393851418b
11 changed files with 280 additions and 220 deletions
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10
Kernel/Process.h
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@ -233,8 +233,8 @@ public:
template<typename T>
bool validate_write_typed(T* value, size_t count = 1) { return validate_write(value, sizeof(T) * count); }
Inode& cwd_inode();
Inode* executable_inode() { return m_executable.ptr(); }
Custody& cwd_custody();
Custody* executable_custody() { return m_executable_custody.ptr(); }
int number_of_open_file_descriptors() const;
int max_open_file_descriptors() const { return m_max_open_file_descriptors; }
@ -273,7 +273,7 @@ private:
friend class Scheduler;
friend class Region;
Process(String&& name, uid_t, gid_t, pid_t ppid, RingLevel, RetainPtr<Inode>&& cwd = nullptr, RetainPtr<Inode>&& executable = nullptr, TTY* = nullptr, Process* fork_parent = nullptr);
Process(String&& name, uid_t, gid_t, pid_t ppid, RingLevel, RetainPtr<Custody>&& cwd = nullptr, RetainPtr<Custody>&& executable = nullptr, TTY* = nullptr, Process* fork_parent = nullptr);
Range allocate_range(LinearAddress, size_t);
@ -319,8 +319,8 @@ private:
byte m_termination_status { 0 };
byte m_termination_signal { 0 };
RetainPtr<Inode> m_cwd;
RetainPtr<Inode> m_executable;
RetainPtr<Custody> m_executable_custody;
RetainPtr<Custody> m_cwd_custody;
TTY* m_tty { nullptr };