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Kernel: Implement multi-watch InodeWatcher :^)

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This patch modifies InodeWatcher to switch to a one watcher, multiple
watches architecture.  The following changes have been made:

- The watch_file syscall is removed, and in its place the
  create_iwatcher, iwatcher_add_watch and iwatcher_remove_watch calls
  have been added.
- InodeWatcher now holds multiple WatchDescriptions for each file that
  is being watched.
- The InodeWatcher file descriptor can be read from to receive events on
  all watched files.

Co-authored-by: Gunnar Beutner <gunnar@beutner.name>
This commit is contained in:
sin-ack 2021-05-12 19:17:51 +00:00 • committed by Andreas Kling
parent 2de11b0dc8
commit fe5ca6ca27
16 changed files with 521 additions and 262 deletions
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304
Kernel/API/Syscall.h
View file

@ -27,154 +27,156 @@ typedef u32 socklen_t;
namespace Kernel {
#define ENUMERATE_SYSCALLS(S) \
S(yield) \
S(open) \
S(close) \
S(read) \
S(lseek) \
S(kill) \
S(getuid) \
S(exit) \
S(geteuid) \
S(getegid) \
S(getgid) \
S(getpid) \
S(getppid) \
S(getresuid) \
S(getresgid) \
S(waitid) \
S(mmap) \
S(munmap) \
S(get_dir_entries) \
S(getcwd) \
S(gettimeofday) \
S(gethostname) \
S(sethostname) \
S(chdir) \
S(uname) \
S(set_mmap_name) \
S(readlink) \
S(write) \
S(ttyname) \
S(stat) \
S(getsid) \
S(setsid) \
S(getpgid) \
S(setpgid) \
S(getpgrp) \
S(fork) \
S(execve) \
S(dup2) \
S(sigaction) \
S(umask) \
S(getgroups) \
S(setgroups) \
S(sigreturn) \
S(sigprocmask) \
S(sigpending) \
S(pipe) \
S(killpg) \
S(seteuid) \
S(setegid) \
S(setuid) \
S(setgid) \
S(setreuid) \
S(setresuid) \
S(setresgid) \
S(alarm) \
S(fstat) \
S(access) \
S(fcntl) \
S(ioctl) \
S(mkdir) \
S(times) \
S(utime) \
S(sync) \
S(ptsname) \
S(select) \
S(unlink) \
S(poll) \
S(rmdir) \
S(chmod) \
S(socket) \
S(bind) \
S(accept) \
S(listen) \
S(connect) \
S(link) \
S(chown) \
S(fchmod) \
S(symlink) \
S(sendmsg) \
S(recvmsg) \
S(getsockopt) \
S(setsockopt) \
S(create_thread) \
S(gettid) \
S(donate) \
S(rename) \
S(ftruncate) \
S(exit_thread) \
S(mknod) \
S(writev) \
S(beep) \
S(getsockname) \
S(getpeername) \
S(socketpair) \
S(sched_setparam) \
S(sched_getparam) \
S(fchown) \
S(halt) \
S(reboot) \
S(mount) \
S(umount) \
S(dump_backtrace) \
S(dbgputch) \
S(dbgputstr) \
S(watch_file) \
S(mprotect) \
S(realpath) \
S(get_process_name) \
S(fchdir) \
S(getrandom) \
S(getkeymap) \
S(setkeymap) \
S(clock_gettime) \
S(clock_settime) \
S(clock_nanosleep) \
S(join_thread) \
S(module_load) \
S(module_unload) \
S(detach_thread) \
S(set_thread_name) \
S(get_thread_name) \
S(madvise) \
S(purge) \
S(profiling_enable) \
S(profiling_disable) \
S(profiling_free_buffer) \
S(futex) \
S(chroot) \
S(pledge) \
S(unveil) \
S(perf_event) \
S(shutdown) \
S(get_stack_bounds) \
S(ptrace) \
S(sendfd) \
S(recvfd) \
S(sysconf) \
S(set_process_name) \
S(disown) \
S(adjtime) \
S(allocate_tls) \
S(prctl) \
S(mremap) \
S(set_coredump_metadata) \
S(anon_create) \
S(msyscall) \
S(readv) \
#define ENUMERATE_SYSCALLS(S) \
S(yield) \
S(open) \
S(close) \
S(read) \
S(lseek) \
S(kill) \
S(getuid) \
S(exit) \
S(geteuid) \
S(getegid) \
S(getgid) \
S(getpid) \
S(getppid) \
S(getresuid) \
S(getresgid) \
S(waitid) \
S(mmap) \
S(munmap) \
S(get_dir_entries) \
S(getcwd) \
S(gettimeofday) \
S(gethostname) \
S(sethostname) \
S(chdir) \
S(uname) \
S(set_mmap_name) \
S(readlink) \
S(write) \
S(ttyname) \
S(stat) \
S(getsid) \
S(setsid) \
S(getpgid) \
S(setpgid) \
S(getpgrp) \
S(fork) \
S(execve) \
S(dup2) \
S(sigaction) \
S(umask) \
S(getgroups) \
S(setgroups) \
S(sigreturn) \
S(sigprocmask) \
S(sigpending) \
S(pipe) \
S(killpg) \
S(seteuid) \
S(setegid) \
S(setuid) \
S(setgid) \
S(setreuid) \
S(setresuid) \
S(setresgid) \
S(alarm) \
S(fstat) \
S(access) \
S(fcntl) \
S(ioctl) \
S(mkdir) \
S(times) \
S(utime) \
S(sync) \
S(ptsname) \
S(select) \
S(unlink) \
S(poll) \
S(rmdir) \
S(chmod) \
S(socket) \
S(bind) \
S(accept) \
S(listen) \
S(connect) \
S(link) \
S(chown) \
S(fchmod) \
S(symlink) \
S(sendmsg) \
S(recvmsg) \
S(getsockopt) \
S(setsockopt) \
S(create_thread) \
S(gettid) \
S(donate) \
S(rename) \
S(ftruncate) \
S(exit_thread) \
S(mknod) \
S(writev) \
S(beep) \
S(getsockname) \
S(getpeername) \
S(socketpair) \
S(sched_setparam) \
S(sched_getparam) \
S(fchown) \
S(halt) \
S(reboot) \
S(mount) \
S(umount) \
S(dump_backtrace) \
S(dbgputch) \
S(dbgputstr) \
S(create_inode_watcher) \
S(inode_watcher_add_watch) \
S(inode_watcher_remove_watch) \
S(mprotect) \
S(realpath) \
S(get_process_name) \
S(fchdir) \
S(getrandom) \
S(getkeymap) \
S(setkeymap) \
S(clock_gettime) \
S(clock_settime) \
S(clock_nanosleep) \
S(join_thread) \
S(module_load) \
S(module_unload) \
S(detach_thread) \
S(set_thread_name) \
S(get_thread_name) \
S(madvise) \
S(purge) \
S(profiling_enable) \
S(profiling_disable) \
S(profiling_free_buffer) \
S(futex) \
S(chroot) \
S(pledge) \
S(unveil) \
S(perf_event) \
S(shutdown) \
S(get_stack_bounds) \
S(ptrace) \
S(sendfd) \
S(recvfd) \
S(sysconf) \
S(set_process_name) \
S(disown) \
S(adjtime) \
S(allocate_tls) \
S(prctl) \
S(mremap) \
S(set_coredump_metadata) \
S(anon_create) \
S(msyscall) \
S(readv) \
S(emuctl)
namespace Syscall {
@ -442,6 +444,12 @@ struct SC_set_coredump_metadata_params {
StringArgument value;
};
struct SC_inode_watcher_add_watch_params {
int fd;
StringArgument user_path;
u32 event_mask;
};
void initialize();
int sync();