Unverified Commit 082f4bbb authored by Tommaso Tocci's avatar Tommaso Tocci
Browse files

intercept statfs

parent 39d9fb59

include/client/hooks.hpp

+2 −0
Original line number Diff line number Diff line
@@ -51,6 +51,8 @@ int hook_readlinkat(int dirfd, const char * cpath, char * buf, int bufsiz); 
int hook_fcntl(unsigned int fd, unsigned int cmd, unsigned long arg);

int hook_renameat(int olddfd, const char * oldname, int newdfd, const char * newname,

                  unsigned int flags);

int hook_statfs(const char * path, struct statfs * buf);

int hook_fstatfs(unsigned int fd, struct statfs * buf);





#endif

src/client/hooks.cpp

+17 −0
Original line number Diff line number Diff line
@@ -626,3 +626,20 @@ int hook_renameat(int olddfd, const char * oldname, 


   return syscall_no_intercept(SYS_renameat2, olddfd, oldpath_pass, newdfd, newpath_pass, flags);

}



int hook_statfs(const char * path, struct statfs * buf) {

    CTX->log()->trace("{}() called with path: {}", __func__, path);

    std::string rel_path;

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

        return with_errno(adafs_statfs(buf));

    }

    return syscall_no_intercept(SYS_statfs, rel_path.c_str(), buf);

}



int hook_fstatfs(unsigned int fd, struct statfs * buf) {

    CTX->log()->trace("{}() called with fs: {}", __func__, fd);

    if (CTX->file_map()->exist(fd)) {

        return with_errno(adafs_statfs(buf));

    }

    return syscall_no_intercept(SYS_fstatfs, fd, buf);

}

src/client/intercept.cpp

+11 −1
Original line number Diff line number Diff line
@@ -286,6 +286,16 @@ static inline int hook(long syscall_number, 
                                static_cast<unsigned int>(arg4));

        break;



    case SYS_fstatfs:

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

                               reinterpret_cast<struct statfs *>(arg1));

        break;



    case SYS_statfs:

        *result = hook_statfs(reinterpret_cast<const char *>(arg0),

                               reinterpret_cast<struct statfs *>(arg1));

        break;



    default:

        /*

         * Ignore any other syscalls