Commit 73dff511 authored by Julius Athenstaedt's avatar Julius Athenstaedt
Browse files

remove DIR* dependency from directory handlers

parent 8a9b6b27

include/client/fuse/fuse_client.hpp

+0 −13
Original line number Diff line number Diff line
@@ -45,19 +45,6 @@ 
extern "C" {

#define FUSE_USE_VERSION FUSE_MAKE_VERSION(3, 12)

#include <fuse3/fuse_lowlevel.h>



// TODO do we really need this? sizeof(DIR) statement, copied from gkfs_libc.hpp

struct __dirstream {

    int fd; // File descriptor.

    //__libc_lock_define (, lock) // Mutex lock for this structure. //TODO

    size_t allocation; // Space allocated for the block.

    size_t size;       // Total valid data in the block.

    size_t offset;     // Current offset into the block.

    off_t filepos;     // Position of next entry to read.

    // Directory block.

    char* path;

    char data[1] __attribute__((aligned(__alignof__(void*))));

}; // Originally its 0, but C++ does not permit it

}



#include <unistd.h>

src/client/fuse/fuse_client.cpp

+7 −40
Original line number Diff line number Diff line
@@ -442,41 +442,20 @@ opendir_handler(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info* fi) { 
        fuse_reply_err(req, ENOTDIR);

        return;

    }

    struct stat st;

    if(ud->debug)

        fuse_log(FUSE_LOG_DEBUG, "open dir %s \n", inode->path.c_str());

    if(gkfs::syscall::gkfs_stat(inode->path, &st) != 0 || S_ISREG(st.st_mode)) {

        fuse_reply_err(req, ENOTDIR);

        return;

    }



    const int fd = gkfs::syscall::gkfs_opendir(inode->path);

    if(fd < 0) {

        fuse_reply_err(req, ENOTDIR);

        return;

    }



    // Simulate DIR structure for GekkoFS

    DIR* dirp =

            static_cast<DIR*>(malloc(sizeof(DIR) + inode->path.length() +

                                     1)); // Approximate size for DIR and path

    if(dirp == nullptr) {

        gkfs::syscall::gkfs_close(fd); // Clean up opened GekkoFS fd

        fuse_reply_err(req, ENOMEM);

        return;

    }

    if(ud->debug)

        fuse_log(FUSE_LOG_DEBUG, "\t with fd %i \n", fd);



    GkfsDir* gkfs_dir = reinterpret_cast<GkfsDir*>(dirp);

    gkfs_dir->fd = fd;

    gkfs_dir->path = strdup(inode->path.c_str()); // strdup allocates memory

    if(!gkfs_dir->path) {

        free(dirp);

        gkfs::syscall::gkfs_close(fd);

        fuse_reply_err(req, ENOMEM);

    if(fd < 0) {

        fuse_reply_err(req, ENOTDIR);

        return;

    }



    fi->fh = (uint64_t) dirp; // pointer trick

    fi->fh = (uint64_t) fd;

    fuse_reply_open(req, fi);

}
@@ -486,13 +465,8 @@ readdir_handler(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off, 
    auto* ud = udata(req);

    if(ud->debug)

        fuse_log(FUSE_LOG_DEBUG, "readdir handler \n");

    auto* dir_ptr = reinterpret_cast<GkfsDir*>(fi->fh);

    if(!dir_ptr) {

        fuse_reply_err(req, EBADF);

        return;

    }



    auto open_dir = CTX->file_map()->get_dir(dir_ptr->fd);

    auto open_dir = CTX->file_map()->get_dir(fi->fh);



    if(ud->debug)

        fuse_log(FUSE_LOG_DEBUG, "read dir %s \n", open_dir->path().c_str());
@@ -516,7 +490,6 @@ readdir_handler(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off, 
        auto de = open_dir->getdent(pos);



        struct stat st{};

        // TODO cannot be right, right? no stat?

        st.st_ino =

                std::hash<std::string>()(open_dir->path() + "/" + de.name());

        st.st_mode = (de.type() == gkfs::filemap::FileType::regular) ? S_IFREG
@@ -572,15 +545,9 @@ releasedir_handler(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info* fi) { 
    auto* ud = udata(req);

    if(ud->debug)

        fuse_log(FUSE_LOG_DEBUG, "releasedir handler \n");

    GkfsDir* dir_ptr = reinterpret_cast<GkfsDir*>(fi->fh);

    if(CTX->interception_enabled() && CTX->file_map()->exist(dir_ptr->fd)) {

        int fd = dir_ptr->fd;

    if(CTX->interception_enabled() && CTX->file_map()->exist(fi->fh)) {

        int ret = gkfs::syscall::gkfs_close(fd); // Close GekkoFS internal FD



        if(dir_ptr->path) { // Check if path was strdup'd

            free(dir_ptr->path);

        }

        free(dir_ptr); // Free the DIR struct itself

        fuse_reply_err(req, ret);

        return;

    }