Unverified Commit d0eabbd2 authored by Tommaso Tocci's avatar Tommaso Tocci
Browse files

intercept mkdir/mkdirat

parent 47388a1d

include/client/hooks.hpp

+1 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ int hook_dup(unsigned int fd); 
int hook_dup2(unsigned int oldfd, unsigned int newfd);

int hook_dup3(unsigned int oldfd, unsigned int newfd, int flags);

int hook_getdents(unsigned int fd, struct linux_dirent *dirp, unsigned int count);

int hook_mkdirat(int dirfd, const char * cpath, mode_t mode);





#endif

src/client/hooks.cpp

+25 −0
Original line number Diff line number Diff line
@@ -189,3 +189,28 @@ int hook_getdents(unsigned int fd, struct linux_dirent *dirp, unsigned int count 
    }

    return syscall_no_intercept(SYS_getdents, fd, dirp, count);

}



int hook_mkdirat(int dirfd, const char * cpath, mode_t mode) {

    CTX->log()->trace("{}() called with fd: {}, path: {}, mode: {}",

                      __func__, dirfd, cpath, mode);



    std::string resolved;

    auto rstatus = CTX->relativize_fd_path(dirfd, cpath, resolved);

    switch(rstatus) {

        case RelativizeStatus::external:

            return syscall_no_intercept(SYS_mkdirat, dirfd, resolved.c_str(), mode);



        case RelativizeStatus::fd_unknown:

            return syscall_no_intercept(SYS_mkdirat, dirfd, cpath, mode);



        case RelativizeStatus::fd_not_a_dir:

            return -ENOTDIR;



        case RelativizeStatus::internal:

            return with_errno(adafs_mk_node(resolved, mode | S_IFDIR));



        default:

            CTX->log()->error("{}() relativize status unknown: {}", __func__);

            return -EINVAL;

    }

}

src/client/intercept.cpp

+12 −0
Original line number Diff line number Diff line
@@ -117,6 +117,18 @@ static inline int hook(long syscall_number, 
                                static_cast<unsigned int>(arg2));

        break;



    case SYS_mkdirat:

        *result = hook_mkdirat(static_cast<unsigned int>(arg0),

                               reinterpret_cast<const char *>(arg1),

                               static_cast<mode_t>(arg2));

        break;



    case SYS_mkdir:

        *result = hook_mkdirat(AT_FDCWD,

                               reinterpret_cast<const char *>(arg0),

                               static_cast<mode_t>(arg1));

        break;



    default:

        /*

         * Ignore any other syscalls