Added readme

README.md

@@ -0,0 +1,60 @@
+# Usage:
+1.
+```shell
+make
+```
+2.
+```shell
+sudo insmod libfs.ko
+```
+3.
+```shell
+sudo mkdir /mnt/customfs
+```
+4.
+```shell
+sudo mount -t customfs none /mnt/customfs
+```
+5.
+```shell
+ls -la /mnt/customfs
+# Должны быть:
+# drwxrwxrwt books
+# drwxr-xr-x authors
+```
+# Testing:
+1. 
+```shell
+echo hello > /mnt/customfs/books/test.txt
+cat /mnt/customfs/books/test.txt
+```
+```shell
+mkdir /mnt/customfs/books/subdir  # Ожидаемый результат: ошибка
+```
+2.
+```shell
+mkdir /mnt/customfs/authors/ivan
+ls -ld /mnt/customfs/authors/ivan  # Проверка прав: drwxrwxrwt
+```
+```shell
+touch /mnt/customfs/authors/ivan/file  # Ожидаемый результат: ошибка
+```
+```shell
+ln /mnt/customfs/books/test.txt /mnt/customfs/authors/ivan/link_to_test
+```
+```shell
+rm /mnt/customfs/books/test.txt
+```
+```shell
+ls /mnt/customfs/authors/ivan  # Должно быть пусто
+```
+3. 
+```shell
+sudo rmdir /mnt/customfs/books  # Ожидаемый результат: ошибка
+sudo mv /mnt/customfs/books /mnt/customfs/books2  # Ожидаемый результат: ошибка
+```
+4. 
+```shell
+sudo umount /mnt/customfs
+sudo rmmod libfs
+```