Verified Commit 68be5b2d authored by Marc Vef's avatar Marc Vef
Browse files

Adding getxattr() syscall support

parent 0cbaae39

include/client/hooks.hpp

+3 −0
Original line number Diff line number Diff line
@@ -173,6 +173,9 @@ hook_fstatfs(unsigned int fd, struct statfs* buf); 
int

hook_fsync(unsigned int fd);



int

hook_getxattr(const char* path, const char* name, void* value, size_t size);



} // namespace gkfs::hook



#endif

src/client/hooks.cpp

+13 −1
Original line number Diff line number Diff line
@@ -182,7 +182,6 @@ hook_lstat(const char* path, struct stat* buf) { 
        return with_errno(gkfs::syscall::gkfs_stat(rel_path, buf));

    }

    return syscall_no_intercept_wrapper(SYS_lstat, rel_path.c_str(), buf);

    ;

}



int
@@ -955,4 +954,17 @@ hook_fsync(unsigned int fd) { 
    return syscall_no_intercept_wrapper(SYS_fsync, fd);

}



int

hook_getxattr(const char* path, const char* name, void* value, size_t size) {



    LOG(DEBUG, "{}() called with path '{}' name '{}' value '{}' size '{}'",

        __func__, path, name, fmt::ptr(value), size);



    std::string rel_path;

    if(CTX->relativize_path(path, rel_path)) {

        return -ENOTSUP;

    }

    return syscall_no_intercept_wrapper(SYS_getxattr, path, name, value, size);

}



} // namespace gkfs::hook

src/client/intercept.cpp

+7 −0
Original line number Diff line number Diff line
@@ -774,6 +774,13 @@ hook(long syscall_number, long arg0, long arg1, long arg2, long arg3, long arg4, 
            *result = gkfs::hook::hook_fsync(static_cast<unsigned int>(arg0));

            break;



        case SYS_getxattr:

            *result = gkfs::hook::hook_getxattr(

                    reinterpret_cast<const char*>(arg0),

                    reinterpret_cast<const char*>(arg1),

                    reinterpret_cast<void*>(arg2), static_cast<size_t>(arg4));

            break;



        default:

            // ignore any other syscalls, i.e.: pass them on to the kernel

            // (syscalls forwarded to the kernel that return are logged in