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More controllable file read/write

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This commit is contained in:
Matéo Duparc 2022-09-23 20:54:23 +02:00
parent c0600c2624
commit dc82772e5e
Signed by: hardcoresushi
GPG Key ID: AFE384344A45E13A
2 changed files with 6 additions and 7 deletions
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4
src/jni/include/libcryfs-jni.h
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@ -9,8 +9,8 @@ jboolean cryfs_change_encryption_key(JNIEnv *env,
jbyteArray jnewPassword, jobject jreturnedHash); jbyteArray jnewPassword, jobject jreturnedHash);
jlong cryfs_create(JNIEnv* env, jlong fusePtr, jstring jpath, mode_t mode); jlong cryfs_create(JNIEnv* env, jlong fusePtr, jstring jpath, mode_t mode);
jlong cryfs_open(JNIEnv* env, jlong fusePtr, jstring jpath, jint flags); jlong cryfs_open(JNIEnv* env, jlong fusePtr, jstring jpath, jint flags);
jint cryfs_read(JNIEnv* env, jlong fusePtr, jlong fileHandle, jbyteArray jbuffer, jlong offset); jint cryfs_read(JNIEnv* env, jlong fusePtr, jlong fileHandle, jlong fileOffset, jbyteArray buffer, jlong dstOffset, jlong length);
jint cryfs_write(JNIEnv* env, jlong fusePtr, jlong fileHandle, jlong offset, jbyteArray jbuffer, jint size); jint cryfs_write(JNIEnv* env, jlong fusePtr, jlong fileHandle, jlong fileOffset, jbyteArray buffer, jlong srcOffset, jlong length);
jint cryfs_truncate(JNIEnv* env, jlong fusePtr, jstring jpath, jlong size); jint cryfs_truncate(JNIEnv* env, jlong fusePtr, jstring jpath, jlong size);
jint cryfs_unlink(JNIEnv* env, jlong fusePtr, jstring jpath); jint cryfs_unlink(JNIEnv* env, jlong fusePtr, jstring jpath);
jint cryfs_release(jlong fusePtr, jlong fileHandle); jint cryfs_release(jlong fusePtr, jlong fileHandle);

9
src/jni/libcryfs-jni.cpp
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@ -148,22 +148,21 @@ extern "C" jlong cryfs_open(JNIEnv* env, jlong fusePtr, jstring jpath, jint flag
} }
} }
extern "C" jint cryfs_read(JNIEnv* env, jlong fusePtr, jlong fileHandle, jbyteArray jbuffer, jlong offset) { extern "C" jint cryfs_read(JNIEnv* env, jlong fusePtr, jlong fileHandle, jlong fileOffset, jbyteArray jbuffer, jlong dstOffset, jlong length) {
Fuse* fuse = reinterpret_cast<Fuse*>(fusePtr); Fuse* fuse = reinterpret_cast<Fuse*>(fusePtr);
const jsize size = env->GetArrayLength(jbuffer);
char* buff = reinterpret_cast<char*>(env->GetByteArrayElements(jbuffer, NULL)); char* buff = reinterpret_cast<char*>(env->GetByteArrayElements(jbuffer, NULL));
int result = fuse->read(buff, size, offset, fileHandle); int result = fuse->read(buff+dstOffset, length, fileOffset, fileHandle);
env->ReleaseByteArrayElements(jbuffer, reinterpret_cast<jbyte*>(buff), 0); env->ReleaseByteArrayElements(jbuffer, reinterpret_cast<jbyte*>(buff), 0);
return result; return result;
} }
extern "C" jint cryfs_write(JNIEnv* env, jlong fusePtr, jlong fileHandle, jlong offset, jbyteArray jbuffer, jint size) { extern "C" jint cryfs_write(JNIEnv* env, jlong fusePtr, jlong fileHandle, jlong fileOffset, jbyteArray jbuffer, jlong srcOffset, jlong length) {
Fuse* fuse = reinterpret_cast<Fuse*>(fusePtr); Fuse* fuse = reinterpret_cast<Fuse*>(fusePtr);
char* buff = reinterpret_cast<char*>(env->GetByteArrayElements(jbuffer, NULL)); char* buff = reinterpret_cast<char*>(env->GetByteArrayElements(jbuffer, NULL));
int result = fuse->write(buff, size, offset, fileHandle); int result = fuse->write(buff+srcOffset, length, fileOffset, fileHandle);
env->ReleaseByteArrayElements(jbuffer, reinterpret_cast<jbyte*>(buff), 0); env->ReleaseByteArrayElements(jbuffer, reinterpret_cast<jbyte*>(buff), 0);
return result; return result;