Add libtar to TWRP instead of using busybox tar
Add proper mkdosfs tool
Add fuse to TWRP
Add experimental exfat-fuse to TWRP
Convert all system() functions to use new Exec_Cmd function
diff --git a/fuse/fuse_lowlevel.c b/fuse/fuse_lowlevel.c
new file mode 100644
index 0000000..90f756e
--- /dev/null
+++ b/fuse/fuse_lowlevel.c
@@ -0,0 +1,1862 @@
+/*
+ FUSE: Filesystem in Userspace
+ Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
+
+ This program can be distributed under the terms of the GNU LGPLv2.
+ See the file COPYING.LIB
+*/
+
+#include "fuse_i.h"
+#include "fuse_kernel.h"
+#include "fuse_opt.h"
+#include "fuse_misc.h"
+#include "fuse_common_compat.h"
+#include "fuse_lowlevel_compat.h"
+
+#define linux
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+
+#define PARAM(inarg) (((char *)(inarg)) + sizeof(*(inarg)))
+#define OFFSET_MAX 0x7fffffffffffffffLL
+
+struct fuse_pollhandle {
+ uint64_t kh;
+ struct fuse_chan *ch;
+ struct fuse_ll *f;
+};
+
+static void convert_stat(const struct stat *stbuf, struct fuse_attr *attr)
+{
+ attr->ino = stbuf->st_ino;
+ attr->mode = stbuf->st_mode;
+ attr->nlink = stbuf->st_nlink;
+ attr->uid = stbuf->st_uid;
+ attr->gid = stbuf->st_gid;
+ attr->rdev = stbuf->st_rdev;
+ attr->size = stbuf->st_size;
+ attr->blksize = stbuf->st_blksize;
+ attr->blocks = stbuf->st_blocks;
+ attr->atime = stbuf->st_atime;
+ attr->mtime = stbuf->st_mtime;
+ attr->ctime = stbuf->st_ctime;
+ attr->atimensec = ST_ATIM_NSEC(stbuf);
+ attr->mtimensec = ST_MTIM_NSEC(stbuf);
+ attr->ctimensec = ST_CTIM_NSEC(stbuf);
+}
+
+static void convert_attr(const struct fuse_setattr_in *attr, struct stat *stbuf)
+{
+ stbuf->st_mode = attr->mode;
+ stbuf->st_uid = attr->uid;
+ stbuf->st_gid = attr->gid;
+ stbuf->st_size = attr->size;
+ stbuf->st_atime = attr->atime;
+ stbuf->st_mtime = attr->mtime;
+ ST_ATIM_NSEC_SET(stbuf, attr->atimensec);
+ ST_MTIM_NSEC_SET(stbuf, attr->mtimensec);
+}
+
+static size_t iov_length(const struct iovec *iov, size_t count)
+{
+ size_t seg;
+ size_t ret = 0;
+
+ for (seg = 0; seg < count; seg++)
+ ret += iov[seg].iov_len;
+ return ret;
+}
+
+static void list_init_req(struct fuse_req *req)
+{
+ req->next = req;
+ req->prev = req;
+}
+
+static void list_del_req(struct fuse_req *req)
+{
+ struct fuse_req *prev = req->prev;
+ struct fuse_req *next = req->next;
+ prev->next = next;
+ next->prev = prev;
+}
+
+static void list_add_req(struct fuse_req *req, struct fuse_req *next)
+{
+ struct fuse_req *prev = next->prev;
+ req->next = next;
+ req->prev = prev;
+ prev->next = req;
+ next->prev = req;
+}
+
+static void destroy_req(fuse_req_t req)
+{
+ pthread_mutex_destroy(&req->lock);
+ free(req);
+}
+
+void fuse_free_req(fuse_req_t req)
+{
+ int ctr;
+ struct fuse_ll *f = req->f;
+
+ pthread_mutex_lock(&f->lock);
+ req->u.ni.func = NULL;
+ req->u.ni.data = NULL;
+ list_del_req(req);
+ ctr = --req->ctr;
+ pthread_mutex_unlock(&f->lock);
+ if (!ctr)
+ destroy_req(req);
+}
+
+int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
+ int count)
+{
+ struct fuse_out_header out;
+
+ if (error <= -1000 || error > 0) {
+ fprintf(stderr, "fuse: bad error value: %i\n", error);
+ error = -ERANGE;
+ }
+
+ out.unique = req->unique;
+ out.error = error;
+ iov[0].iov_base = &out;
+ iov[0].iov_len = sizeof(struct fuse_out_header);
+ out.len = iov_length(iov, count);
+
+ if (req->f->debug) {
+ if (out.error) {
+ fprintf(stderr,
+ " unique: %llu, error: %i (%s), outsize: %i\n",
+ (unsigned long long) out.unique, out.error,
+ strerror(-out.error), out.len);
+ } else {
+ fprintf(stderr,
+ " unique: %llu, success, outsize: %i\n",
+ (unsigned long long) out.unique, out.len);
+ }
+ }
+
+ return fuse_chan_send(req->ch, iov, count);
+}
+
+static int send_reply_iov(fuse_req_t req, int error, struct iovec *iov,
+ int count)
+{
+ int res;
+
+ res = fuse_send_reply_iov_nofree(req, error, iov, count);
+ fuse_free_req(req);
+ return res;
+}
+
+static int send_reply(fuse_req_t req, int error, const void *arg,
+ size_t argsize)
+{
+ struct iovec iov[2];
+ int count = 1;
+ if (argsize) {
+ iov[1].iov_base = (void *) arg;
+ iov[1].iov_len = argsize;
+ count++;
+ }
+ return send_reply_iov(req, error, iov, count);
+}
+
+int fuse_reply_iov(fuse_req_t req, const struct iovec *iov, int count)
+{
+ int res;
+ struct iovec *padded_iov;
+
+ padded_iov = malloc((count + 1) * sizeof(struct iovec));
+ if (padded_iov == NULL)
+ return fuse_reply_err(req, -ENOMEM);
+
+ memcpy(padded_iov + 1, iov, count * sizeof(struct iovec));
+ count++;
+
+ res = send_reply_iov(req, 0, padded_iov, count);
+ free(padded_iov);
+
+ return res;
+}
+
+size_t fuse_dirent_size(size_t namelen)
+{
+ return FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + namelen);
+}
+
+char *fuse_add_dirent(char *buf, const char *name, const struct stat *stbuf,
+ off64_t off)
+{
+ unsigned namelen = strlen(name);
+ unsigned entlen = FUSE_NAME_OFFSET + namelen;
+ unsigned entsize = fuse_dirent_size(namelen);
+ unsigned padlen = entsize - entlen;
+ struct fuse_dirent *dirent = (struct fuse_dirent *) buf;
+
+ dirent->ino = stbuf->st_ino;
+ dirent->off = off;
+ dirent->namelen = namelen;
+ dirent->type = (stbuf->st_mode & 0170000) >> 12;
+ strncpy(dirent->name, name, namelen);
+ if (padlen)
+ memset(buf + entlen, 0, padlen);
+
+ return buf + entsize;
+}
+
+size_t fuse_add_direntry(fuse_req_t req, char *buf, size_t bufsize,
+ const char *name, const struct stat *stbuf, off64_t off)
+{
+ size_t entsize;
+
+ (void) req;
+ entsize = fuse_dirent_size(strlen(name));
+ if (entsize <= bufsize && buf)
+ fuse_add_dirent(buf, name, stbuf, off);
+ return entsize;
+}
+
+static void convert_statfs(const struct statvfs *stbuf,
+ struct fuse_kstatfs *kstatfs)
+{
+ kstatfs->bsize = stbuf->f_bsize;
+ kstatfs->frsize = stbuf->f_frsize;
+ kstatfs->blocks = stbuf->f_blocks;
+ kstatfs->bfree = stbuf->f_bfree;
+ kstatfs->bavail = stbuf->f_bavail;
+ kstatfs->files = stbuf->f_files;
+ kstatfs->ffree = stbuf->f_ffree;
+ kstatfs->namelen = stbuf->f_namemax;
+}
+
+static int send_reply_ok(fuse_req_t req, const void *arg, size_t argsize)
+{
+ return send_reply(req, 0, arg, argsize);
+}
+
+int fuse_reply_err(fuse_req_t req, int err)
+{
+ return send_reply(req, -err, NULL, 0);
+}
+
+void fuse_reply_none(fuse_req_t req)
+{
+ fuse_chan_send(req->ch, NULL, 0);
+ fuse_free_req(req);
+}
+
+static unsigned long calc_timeout_sec(double t)
+{
+ if (t > (double) ULONG_MAX)
+ return ULONG_MAX;
+ else if (t < 0.0)
+ return 0;
+ else
+ return (unsigned long) t;
+}
+
+static unsigned int calc_timeout_nsec(double t)
+{
+ double f = t - (double) calc_timeout_sec(t);
+ if (f < 0.0)
+ return 0;
+ else if (f >= 0.999999999)
+ return 999999999;
+ else
+ return (unsigned int) (f * 1.0e9);
+}
+
+static void fill_entry(struct fuse_entry_out *arg,
+ const struct fuse_entry_param *e)
+{
+ arg->nodeid = e->ino;
+ arg->generation = e->generation;
+ arg->entry_valid = calc_timeout_sec(e->entry_timeout);
+ arg->entry_valid_nsec = calc_timeout_nsec(e->entry_timeout);
+ arg->attr_valid = calc_timeout_sec(e->attr_timeout);
+ arg->attr_valid_nsec = calc_timeout_nsec(e->attr_timeout);
+ convert_stat(&e->attr, &arg->attr);
+}
+
+static void fill_open(struct fuse_open_out *arg,
+ const struct fuse_file_info *f)
+{
+ arg->fh = f->fh;
+ if (f->direct_io)
+ arg->open_flags |= FOPEN_DIRECT_IO;
+ if (f->keep_cache)
+ arg->open_flags |= FOPEN_KEEP_CACHE;
+ if (f->nonseekable)
+ arg->open_flags |= FOPEN_NONSEEKABLE;
+}
+
+int fuse_reply_entry(fuse_req_t req, const struct fuse_entry_param *e)
+{
+ struct fuse_entry_out arg;
+ size_t size = req->f->conn.proto_minor < 9 ?
+ FUSE_COMPAT_ENTRY_OUT_SIZE : sizeof(arg);
+
+ /* before ABI 7.4 e->ino == 0 was invalid, only ENOENT meant
+ negative entry */
+ if (!e->ino && req->f->conn.proto_minor < 4)
+ return fuse_reply_err(req, ENOENT);
+
+ memset(&arg, 0, sizeof(arg));
+ fill_entry(&arg, e);
+ return send_reply_ok(req, &arg, size);
+}
+
+int fuse_reply_create(fuse_req_t req, const struct fuse_entry_param *e,
+ const struct fuse_file_info *f)
+{
+ char buf[sizeof(struct fuse_entry_out) + sizeof(struct fuse_open_out)];
+ size_t entrysize = req->f->conn.proto_minor < 9 ?
+ FUSE_COMPAT_ENTRY_OUT_SIZE : sizeof(struct fuse_entry_out);
+ struct fuse_entry_out *earg = (struct fuse_entry_out *) buf;
+ struct fuse_open_out *oarg = (struct fuse_open_out *) (buf + entrysize);
+
+ memset(buf, 0, sizeof(buf));
+ fill_entry(earg, e);
+ fill_open(oarg, f);
+ return send_reply_ok(req, buf,
+ entrysize + sizeof(struct fuse_open_out));
+}
+
+int fuse_reply_attr(fuse_req_t req, const struct stat *attr,
+ double attr_timeout)
+{
+ struct fuse_attr_out arg;
+ size_t size = req->f->conn.proto_minor < 9 ?
+ FUSE_COMPAT_ATTR_OUT_SIZE : sizeof(arg);
+
+ memset(&arg, 0, sizeof(arg));
+ arg.attr_valid = calc_timeout_sec(attr_timeout);
+ arg.attr_valid_nsec = calc_timeout_nsec(attr_timeout);
+ convert_stat(attr, &arg.attr);
+
+ return send_reply_ok(req, &arg, size);
+}
+
+int fuse_reply_readlink(fuse_req_t req, const char *linkname)
+{
+ return send_reply_ok(req, linkname, strlen(linkname));
+}
+
+int fuse_reply_open(fuse_req_t req, const struct fuse_file_info *f)
+{
+ struct fuse_open_out arg;
+
+ memset(&arg, 0, sizeof(arg));
+ fill_open(&arg, f);
+ return send_reply_ok(req, &arg, sizeof(arg));
+}
+
+int fuse_reply_write(fuse_req_t req, size_t count)
+{
+ struct fuse_write_out arg;
+
+ memset(&arg, 0, sizeof(arg));
+ arg.size = count;
+
+ return send_reply_ok(req, &arg, sizeof(arg));
+}
+
+int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size)
+{
+ return send_reply_ok(req, buf, size);
+}
+
+int fuse_reply_statfs(fuse_req_t req, const struct statvfs *stbuf)
+{
+ struct fuse_statfs_out arg;
+ size_t size = req->f->conn.proto_minor < 4 ?
+ FUSE_COMPAT_STATFS_SIZE : sizeof(arg);
+
+ memset(&arg, 0, sizeof(arg));
+ convert_statfs(stbuf, &arg.st);
+
+ return send_reply_ok(req, &arg, size);
+}
+
+int fuse_reply_xattr(fuse_req_t req, size_t count)
+{
+ struct fuse_getxattr_out arg;
+
+ memset(&arg, 0, sizeof(arg));
+ arg.size = count;
+
+ return send_reply_ok(req, &arg, sizeof(arg));
+}
+
+int fuse_reply_lock(fuse_req_t req, struct flock *lock)
+{
+ struct fuse_lk_out arg;
+
+ memset(&arg, 0, sizeof(arg));
+ arg.lk.type = lock->l_type;
+ if (lock->l_type != F_UNLCK) {
+ arg.lk.start = lock->l_start;
+ if (lock->l_len == 0)
+ arg.lk.end = OFFSET_MAX;
+ else
+ arg.lk.end = lock->l_start + lock->l_len - 1;
+ }
+ arg.lk.pid = lock->l_pid;
+ return send_reply_ok(req, &arg, sizeof(arg));
+}
+
+int fuse_reply_bmap(fuse_req_t req, uint64_t idx)
+{
+ struct fuse_bmap_out arg;
+
+ memset(&arg, 0, sizeof(arg));
+ arg.block = idx;
+
+ return send_reply_ok(req, &arg, sizeof(arg));
+}
+
+int fuse_reply_ioctl_retry(fuse_req_t req,
+ const struct iovec *in_iov, size_t in_count,
+ const struct iovec *out_iov, size_t out_count)
+{
+ struct fuse_ioctl_out arg;
+ struct iovec iov[4];
+ size_t count = 1;
+
+ memset(&arg, 0, sizeof(arg));
+ arg.flags |= FUSE_IOCTL_RETRY;
+ arg.in_iovs = in_count;
+ arg.out_iovs = out_count;
+ iov[count].iov_base = &arg;
+ iov[count].iov_len = sizeof(arg);
+ count++;
+
+ if (in_count) {
+ iov[count].iov_base = (void *)in_iov;
+ iov[count].iov_len = sizeof(in_iov[0]) * in_count;
+ count++;
+ }
+
+ if (out_count) {
+ iov[count].iov_base = (void *)out_iov;
+ iov[count].iov_len = sizeof(out_iov[0]) * out_count;
+ count++;
+ }
+
+ return send_reply_iov(req, 0, iov, count);
+}
+
+int fuse_reply_ioctl(fuse_req_t req, int result, const void *buf, size_t size)
+{
+ struct fuse_ioctl_out arg;
+ struct iovec iov[3];
+ size_t count = 1;
+
+ memset(&arg, 0, sizeof(arg));
+ arg.result = result;
+ iov[count].iov_base = &arg;
+ iov[count].iov_len = sizeof(arg);
+ count++;
+
+ if (size) {
+ iov[count].iov_base = (char *) buf;
+ iov[count].iov_len = size;
+ count++;
+ }
+
+ return send_reply_iov(req, 0, iov, count);
+}
+
+int fuse_reply_ioctl_iov(fuse_req_t req, int result, const struct iovec *iov,
+ int count)
+{
+ struct iovec *padded_iov;
+ struct fuse_ioctl_out arg;
+ int res;
+
+ padded_iov = malloc((count + 2) * sizeof(struct iovec));
+ if (padded_iov == NULL)
+ return fuse_reply_err(req, -ENOMEM);
+
+ memset(&arg, 0, sizeof(arg));
+ arg.result = result;
+ padded_iov[1].iov_base = &arg;
+ padded_iov[1].iov_len = sizeof(arg);
+
+ memcpy(&padded_iov[2], iov, count * sizeof(struct iovec));
+
+ res = send_reply_iov(req, 0, padded_iov, count + 2);
+ free(padded_iov);
+
+ return res;
+}
+
+int fuse_reply_poll(fuse_req_t req, unsigned revents)
+{
+ struct fuse_poll_out arg;
+
+ memset(&arg, 0, sizeof(arg));
+ arg.revents = revents;
+
+ return send_reply_ok(req, &arg, sizeof(arg));
+}
+
+static void do_lookup(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ char *name = (char *) inarg;
+
+ if (req->f->op.lookup)
+ req->f->op.lookup(req, nodeid, name);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_forget(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_forget_in *arg = (struct fuse_forget_in *) inarg;
+
+ if (req->f->op.forget)
+ req->f->op.forget(req, nodeid, arg->nlookup);
+ else
+ fuse_reply_none(req);
+}
+
+static void do_getattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_file_info *fip = NULL;
+ struct fuse_file_info fi;
+
+ if (req->f->conn.proto_minor >= 9) {
+ struct fuse_getattr_in *arg = (struct fuse_getattr_in *) inarg;
+
+ if (arg->getattr_flags & FUSE_GETATTR_FH) {
+ memset(&fi, 0, sizeof(fi));
+ fi.fh = arg->fh;
+ fi.fh_old = fi.fh;
+ fip = &fi;
+ }
+ }
+
+ if (req->f->op.getattr)
+ req->f->op.getattr(req, nodeid, fip);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_setattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_setattr_in *arg = (struct fuse_setattr_in *) inarg;
+
+ if (req->f->op.setattr) {
+ struct fuse_file_info *fi = NULL;
+ struct fuse_file_info fi_store;
+ struct stat stbuf;
+ memset(&stbuf, 0, sizeof(stbuf));
+ convert_attr(arg, &stbuf);
+ if (arg->valid & FATTR_FH) {
+ arg->valid &= ~FATTR_FH;
+ memset(&fi_store, 0, sizeof(fi_store));
+ fi = &fi_store;
+ fi->fh = arg->fh;
+ fi->fh_old = fi->fh;
+ }
+ arg->valid &=
+ FUSE_SET_ATTR_MODE |
+ FUSE_SET_ATTR_UID |
+ FUSE_SET_ATTR_GID |
+ FUSE_SET_ATTR_SIZE |
+ FUSE_SET_ATTR_ATIME |
+ FUSE_SET_ATTR_MTIME |
+ FUSE_SET_ATTR_ATIME_NOW |
+ FUSE_SET_ATTR_MTIME_NOW;
+
+ req->f->op.setattr(req, nodeid, &stbuf, arg->valid, fi);
+ } else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_access(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_access_in *arg = (struct fuse_access_in *) inarg;
+
+ if (req->f->op.access)
+ req->f->op.access(req, nodeid, arg->mask);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_readlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ (void) inarg;
+
+ if (req->f->op.readlink)
+ req->f->op.readlink(req, nodeid);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_mknod(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_mknod_in *arg = (struct fuse_mknod_in *) inarg;
+ char *name = PARAM(arg);
+
+ if (req->f->conn.proto_minor >= 12)
+ req->ctx.umask = arg->umask;
+ else
+ name = (char *) inarg + FUSE_COMPAT_MKNOD_IN_SIZE;
+
+ if (req->f->op.mknod)
+ req->f->op.mknod(req, nodeid, name, arg->mode, arg->rdev);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_mkdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_mkdir_in *arg = (struct fuse_mkdir_in *) inarg;
+
+ if (req->f->conn.proto_minor >= 12)
+ req->ctx.umask = arg->umask;
+
+ if (req->f->op.mkdir)
+ req->f->op.mkdir(req, nodeid, PARAM(arg), arg->mode);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_unlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ char *name = (char *) inarg;
+
+ if (req->f->op.unlink)
+ req->f->op.unlink(req, nodeid, name);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_rmdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ char *name = (char *) inarg;
+
+ if (req->f->op.rmdir)
+ req->f->op.rmdir(req, nodeid, name);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_symlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ char *name = (char *) inarg;
+ char *linkname = ((char *) inarg) + strlen((char *) inarg) + 1;
+
+ if (req->f->op.symlink)
+ req->f->op.symlink(req, linkname, nodeid, name);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_rename(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_rename_in *arg = (struct fuse_rename_in *) inarg;
+ char *oldname = PARAM(arg);
+ char *newname = oldname + strlen(oldname) + 1;
+
+ if (req->f->op.rename)
+ req->f->op.rename(req, nodeid, oldname, arg->newdir, newname);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_link(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_link_in *arg = (struct fuse_link_in *) inarg;
+
+ if (req->f->op.link)
+ req->f->op.link(req, arg->oldnodeid, nodeid, PARAM(arg));
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_create(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_create_in *arg = (struct fuse_create_in *) inarg;
+
+ if (req->f->op.create) {
+ struct fuse_file_info fi;
+ char *name = PARAM(arg);
+
+ memset(&fi, 0, sizeof(fi));
+ fi.flags = arg->flags;
+
+ if (req->f->conn.proto_minor >= 12)
+ req->ctx.umask = arg->umask;
+ else
+ name = (char *) inarg + sizeof(struct fuse_open_in);
+
+ req->f->op.create(req, nodeid, name, arg->mode, &fi);
+ } else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_open(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_open_in *arg = (struct fuse_open_in *) inarg;
+ struct fuse_file_info fi;
+
+ memset(&fi, 0, sizeof(fi));
+ fi.flags = arg->flags;
+
+ if (req->f->op.open)
+ req->f->op.open(req, nodeid, &fi);
+ else
+ fuse_reply_open(req, &fi);
+}
+
+static void do_read(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_read_in *arg = (struct fuse_read_in *) inarg;
+
+ if (req->f->op.read) {
+ struct fuse_file_info fi;
+
+ memset(&fi, 0, sizeof(fi));
+ fi.fh = arg->fh;
+ fi.fh_old = fi.fh;
+ if (req->f->conn.proto_minor >= 9) {
+ fi.lock_owner = arg->lock_owner;
+ fi.flags = arg->flags;
+ }
+ req->f->op.read(req, nodeid, arg->size, arg->offset, &fi);
+ } else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_write(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_write_in *arg = (struct fuse_write_in *) inarg;
+ struct fuse_file_info fi;
+ char *param;
+
+ memset(&fi, 0, sizeof(fi));
+ fi.fh = arg->fh;
+ fi.fh_old = fi.fh;
+ fi.writepage = arg->write_flags & 1;
+
+ if (req->f->conn.proto_minor < 9) {
+ param = ((char *) arg) + FUSE_COMPAT_WRITE_IN_SIZE;
+ } else {
+ fi.lock_owner = arg->lock_owner;
+ fi.flags = arg->flags;
+ param = PARAM(arg);
+ }
+
+ if (req->f->op.write)
+ req->f->op.write(req, nodeid, param, arg->size,
+ arg->offset, &fi);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_flush(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_flush_in *arg = (struct fuse_flush_in *) inarg;
+ struct fuse_file_info fi;
+
+ memset(&fi, 0, sizeof(fi));
+ fi.fh = arg->fh;
+ fi.fh_old = fi.fh;
+ fi.flush = 1;
+ if (req->f->conn.proto_minor >= 7)
+ fi.lock_owner = arg->lock_owner;
+
+ if (req->f->op.flush)
+ req->f->op.flush(req, nodeid, &fi);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_release(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_release_in *arg = (struct fuse_release_in *) inarg;
+ struct fuse_file_info fi;
+
+ memset(&fi, 0, sizeof(fi));
+ fi.flags = arg->flags;
+ fi.fh = arg->fh;
+ fi.fh_old = fi.fh;
+ if (req->f->conn.proto_minor >= 8) {
+ fi.flush = (arg->release_flags & FUSE_RELEASE_FLUSH) ? 1 : 0;
+ fi.lock_owner = arg->lock_owner;
+ }
+
+ if (req->f->op.release)
+ req->f->op.release(req, nodeid, &fi);
+ else
+ fuse_reply_err(req, 0);
+}
+
+static void do_fsync(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_fsync_in *arg = (struct fuse_fsync_in *) inarg;
+ struct fuse_file_info fi;
+
+ memset(&fi, 0, sizeof(fi));
+ fi.fh = arg->fh;
+ fi.fh_old = fi.fh;
+
+ if (req->f->op.fsync)
+ req->f->op.fsync(req, nodeid, arg->fsync_flags & 1, &fi);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_opendir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_open_in *arg = (struct fuse_open_in *) inarg;
+ struct fuse_file_info fi;
+
+ memset(&fi, 0, sizeof(fi));
+ fi.flags = arg->flags;
+
+ if (req->f->op.opendir)
+ req->f->op.opendir(req, nodeid, &fi);
+ else
+ fuse_reply_open(req, &fi);
+}
+
+static void do_readdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_read_in *arg = (struct fuse_read_in *) inarg;
+ struct fuse_file_info fi;
+
+ memset(&fi, 0, sizeof(fi));
+ fi.fh = arg->fh;
+ fi.fh_old = fi.fh;
+
+ if (req->f->op.readdir)
+ req->f->op.readdir(req, nodeid, arg->size, arg->offset, &fi);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_releasedir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_release_in *arg = (struct fuse_release_in *) inarg;
+ struct fuse_file_info fi;
+
+ memset(&fi, 0, sizeof(fi));
+ fi.flags = arg->flags;
+ fi.fh = arg->fh;
+ fi.fh_old = fi.fh;
+
+ if (req->f->op.releasedir)
+ req->f->op.releasedir(req, nodeid, &fi);
+ else
+ fuse_reply_err(req, 0);
+}
+
+static void do_fsyncdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_fsync_in *arg = (struct fuse_fsync_in *) inarg;
+ struct fuse_file_info fi;
+
+ memset(&fi, 0, sizeof(fi));
+ fi.fh = arg->fh;
+ fi.fh_old = fi.fh;
+
+ if (req->f->op.fsyncdir)
+ req->f->op.fsyncdir(req, nodeid, arg->fsync_flags & 1, &fi);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_statfs(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ (void) nodeid;
+ (void) inarg;
+
+ if (req->f->op.statfs)
+ req->f->op.statfs(req, nodeid);
+ else {
+ struct statvfs buf = {
+ .f_namemax = 255,
+ .f_bsize = 512,
+ };
+ fuse_reply_statfs(req, &buf);
+ }
+}
+
+static void do_setxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_setxattr_in *arg = (struct fuse_setxattr_in *) inarg;
+ char *name = PARAM(arg);
+ char *value = name + strlen(name) + 1;
+
+ if (req->f->op.setxattr)
+ req->f->op.setxattr(req, nodeid, name, value, arg->size,
+ arg->flags);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_getxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_getxattr_in *arg = (struct fuse_getxattr_in *) inarg;
+
+ if (req->f->op.getxattr)
+ req->f->op.getxattr(req, nodeid, PARAM(arg), arg->size);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_listxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_getxattr_in *arg = (struct fuse_getxattr_in *) inarg;
+
+ if (req->f->op.listxattr)
+ req->f->op.listxattr(req, nodeid, arg->size);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_removexattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ char *name = (char *) inarg;
+
+ if (req->f->op.removexattr)
+ req->f->op.removexattr(req, nodeid, name);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void convert_fuse_file_lock(struct fuse_file_lock *fl,
+ struct flock *flock)
+{
+ memset(flock, 0, sizeof(struct flock));
+ flock->l_type = fl->type;
+ flock->l_whence = SEEK_SET;
+ flock->l_start = fl->start;
+ if (fl->end == OFFSET_MAX)
+ flock->l_len = 0;
+ else
+ flock->l_len = fl->end - fl->start + 1;
+ flock->l_pid = fl->pid;
+}
+
+static void do_getlk(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_lk_in *arg = (struct fuse_lk_in *) inarg;
+ struct fuse_file_info fi;
+ struct flock flock;
+
+ memset(&fi, 0, sizeof(fi));
+ fi.fh = arg->fh;
+ fi.lock_owner = arg->owner;
+
+ convert_fuse_file_lock(&arg->lk, &flock);
+ if (req->f->op.getlk)
+ req->f->op.getlk(req, nodeid, &fi, &flock);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_setlk_common(fuse_req_t req, fuse_ino_t nodeid,
+ const void *inarg, int sleep)
+{
+ struct fuse_lk_in *arg = (struct fuse_lk_in *) inarg;
+ struct fuse_file_info fi;
+ struct flock flock;
+
+ memset(&fi, 0, sizeof(fi));
+ fi.fh = arg->fh;
+ fi.lock_owner = arg->owner;
+
+ convert_fuse_file_lock(&arg->lk, &flock);
+ if (req->f->op.setlk)
+ req->f->op.setlk(req, nodeid, &fi, &flock, sleep);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_setlk(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ do_setlk_common(req, nodeid, inarg, 0);
+}
+
+static void do_setlkw(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ do_setlk_common(req, nodeid, inarg, 1);
+}
+
+static int find_interrupted(struct fuse_ll *f, struct fuse_req *req)
+{
+ struct fuse_req *curr;
+
+ for (curr = f->list.next; curr != &f->list; curr = curr->next) {
+ if (curr->unique == req->u.i.unique) {
+ fuse_interrupt_func_t func;
+ void *data;
+
+ curr->ctr++;
+ pthread_mutex_unlock(&f->lock);
+
+ /* Ugh, ugly locking */
+ pthread_mutex_lock(&curr->lock);
+ pthread_mutex_lock(&f->lock);
+ curr->interrupted = 1;
+ func = curr->u.ni.func;
+ data = curr->u.ni.data;
+ pthread_mutex_unlock(&f->lock);
+ if (func)
+ func(curr, data);
+ pthread_mutex_unlock(&curr->lock);
+
+ pthread_mutex_lock(&f->lock);
+ curr->ctr--;
+ if (!curr->ctr)
+ destroy_req(curr);
+
+ return 1;
+ }
+ }
+ for (curr = f->interrupts.next; curr != &f->interrupts;
+ curr = curr->next) {
+ if (curr->u.i.unique == req->u.i.unique)
+ return 1;
+ }
+ return 0;
+}
+
+static void do_interrupt(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_interrupt_in *arg = (struct fuse_interrupt_in *) inarg;
+ struct fuse_ll *f = req->f;
+
+ (void) nodeid;
+ if (f->debug)
+ fprintf(stderr, "INTERRUPT: %llu\n",
+ (unsigned long long) arg->unique);
+
+ req->u.i.unique = arg->unique;
+
+ pthread_mutex_lock(&f->lock);
+ if (find_interrupted(f, req))
+ destroy_req(req);
+ else
+ list_add_req(req, &f->interrupts);
+ pthread_mutex_unlock(&f->lock);
+}
+
+static struct fuse_req *check_interrupt(struct fuse_ll *f, struct fuse_req *req)
+{
+ struct fuse_req *curr;
+
+ for (curr = f->interrupts.next; curr != &f->interrupts;
+ curr = curr->next) {
+ if (curr->u.i.unique == req->unique) {
+ req->interrupted = 1;
+ list_del_req(curr);
+ free(curr);
+ return NULL;
+ }
+ }
+ curr = f->interrupts.next;
+ if (curr != &f->interrupts) {
+ list_del_req(curr);
+ list_init_req(curr);
+ return curr;
+ } else
+ return NULL;
+}
+
+static void do_bmap(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_bmap_in *arg = (struct fuse_bmap_in *) inarg;
+
+ if (req->f->op.bmap)
+ req->f->op.bmap(req, nodeid, arg->blocksize, arg->block);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+static void do_ioctl(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_ioctl_in *arg = (struct fuse_ioctl_in *) inarg;
+ unsigned int flags = arg->flags;
+ void *in_buf = arg->in_size ? PARAM(arg) : NULL;
+ struct fuse_file_info fi;
+
+ memset(&fi, 0, sizeof(fi));
+ fi.fh = arg->fh;
+ fi.fh_old = fi.fh;
+
+ if (req->f->op.ioctl)
+ req->f->op.ioctl(req, nodeid, arg->cmd,
+ (void *)(uintptr_t)arg->arg, &fi, flags,
+ in_buf, arg->in_size, arg->out_size);
+ else
+ fuse_reply_err(req, ENOSYS);
+}
+
+void fuse_pollhandle_destroy(struct fuse_pollhandle *ph)
+{
+ free(ph);
+}
+
+static void do_poll(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_poll_in *arg = (struct fuse_poll_in *) inarg;
+ struct fuse_file_info fi;
+
+ memset(&fi, 0, sizeof(fi));
+ fi.fh = arg->fh;
+ fi.fh_old = fi.fh;
+
+ if (req->f->op.poll) {
+ struct fuse_pollhandle *ph = NULL;
+
+ if (arg->flags & FUSE_POLL_SCHEDULE_NOTIFY) {
+ ph = malloc(sizeof(struct fuse_pollhandle));
+ if (ph == NULL) {
+ fuse_reply_err(req, ENOMEM);
+ return;
+ }
+ ph->kh = arg->kh;
+ ph->ch = req->ch;
+ ph->f = req->f;
+ }
+
+ req->f->op.poll(req, nodeid, &fi, ph);
+ } else {
+ fuse_reply_err(req, ENOSYS);
+ }
+}
+
+static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_init_in *arg = (struct fuse_init_in *) inarg;
+ struct fuse_init_out outarg;
+ struct fuse_ll *f = req->f;
+ size_t bufsize = fuse_chan_bufsize(req->ch);
+
+ (void) nodeid;
+ if (f->debug) {
+ fprintf(stderr, "INIT: %u.%u\n", arg->major, arg->minor);
+ if (arg->major == 7 && arg->minor >= 6) {
+ fprintf(stderr, "flags=0x%08x\n", arg->flags);
+ fprintf(stderr, "max_readahead=0x%08x\n",
+ arg->max_readahead);
+ }
+ }
+ f->conn.proto_major = arg->major;
+ f->conn.proto_minor = arg->minor;
+ f->conn.capable = 0;
+ f->conn.want = 0;
+
+ memset(&outarg, 0, sizeof(outarg));
+ outarg.major = FUSE_KERNEL_VERSION;
+ outarg.minor = FUSE_KERNEL_MINOR_VERSION;
+
+ if (arg->major < 7) {
+ fprintf(stderr, "fuse: unsupported protocol version: %u.%u\n",
+ arg->major, arg->minor);
+ fuse_reply_err(req, EPROTO);
+ return;
+ }
+
+ if (arg->major > 7) {
+ /* Wait for a second INIT request with a 7.X version */
+ send_reply_ok(req, &outarg, sizeof(outarg));
+ return;
+ }
+
+ if (arg->minor >= 6) {
+ if (f->conn.async_read)
+ f->conn.async_read = arg->flags & FUSE_ASYNC_READ;
+ if (arg->max_readahead < f->conn.max_readahead)
+ f->conn.max_readahead = arg->max_readahead;
+ if (arg->flags & FUSE_ASYNC_READ)
+ f->conn.capable |= FUSE_CAP_ASYNC_READ;
+ if (arg->flags & FUSE_POSIX_LOCKS)
+ f->conn.capable |= FUSE_CAP_POSIX_LOCKS;
+ if (arg->flags & FUSE_ATOMIC_O_TRUNC)
+ f->conn.capable |= FUSE_CAP_ATOMIC_O_TRUNC;
+ if (arg->flags & FUSE_EXPORT_SUPPORT)
+ f->conn.capable |= FUSE_CAP_EXPORT_SUPPORT;
+ if (arg->flags & FUSE_BIG_WRITES)
+ f->conn.capable |= FUSE_CAP_BIG_WRITES;
+ if (arg->flags & FUSE_DONT_MASK)
+ f->conn.capable |= FUSE_CAP_DONT_MASK;
+ } else {
+ f->conn.async_read = 0;
+ f->conn.max_readahead = 0;
+ }
+
+ if (f->atomic_o_trunc)
+ f->conn.want |= FUSE_CAP_ATOMIC_O_TRUNC;
+ if (f->op.getlk && f->op.setlk && !f->no_remote_lock)
+ f->conn.want |= FUSE_CAP_POSIX_LOCKS;
+ if (f->big_writes)
+ f->conn.want |= FUSE_CAP_BIG_WRITES;
+
+ if (bufsize < FUSE_MIN_READ_BUFFER) {
+ fprintf(stderr, "fuse: warning: buffer size too small: %zu\n",
+ bufsize);
+ bufsize = FUSE_MIN_READ_BUFFER;
+ }
+
+ bufsize -= 4096;
+ if (bufsize < f->conn.max_write)
+ f->conn.max_write = bufsize;
+
+ f->got_init = 1;
+ if (f->op.init)
+ f->op.init(f->userdata, &f->conn);
+
+ if (f->conn.async_read || (f->conn.want & FUSE_CAP_ASYNC_READ))
+ outarg.flags |= FUSE_ASYNC_READ;
+ if (f->conn.want & FUSE_CAP_POSIX_LOCKS)
+ outarg.flags |= FUSE_POSIX_LOCKS;
+ if (f->conn.want & FUSE_CAP_ATOMIC_O_TRUNC)
+ outarg.flags |= FUSE_ATOMIC_O_TRUNC;
+ if (f->conn.want & FUSE_CAP_EXPORT_SUPPORT)
+ outarg.flags |= FUSE_EXPORT_SUPPORT;
+ if (f->conn.want & FUSE_CAP_BIG_WRITES)
+ outarg.flags |= FUSE_BIG_WRITES;
+ if (f->conn.want & FUSE_CAP_DONT_MASK)
+ outarg.flags |= FUSE_DONT_MASK;
+ outarg.max_readahead = f->conn.max_readahead;
+ outarg.max_write = f->conn.max_write;
+
+ if (f->debug) {
+ fprintf(stderr, " INIT: %u.%u\n", outarg.major, outarg.minor);
+ fprintf(stderr, " flags=0x%08x\n", outarg.flags);
+ fprintf(stderr, " max_readahead=0x%08x\n",
+ outarg.max_readahead);
+ fprintf(stderr, " max_write=0x%08x\n", outarg.max_write);
+ }
+
+ send_reply_ok(req, &outarg, arg->minor < 5 ? 8 : sizeof(outarg));
+}
+
+static void do_destroy(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+ struct fuse_ll *f = req->f;
+
+ (void) nodeid;
+ (void) inarg;
+
+ f->got_destroy = 1;
+ if (f->op.destroy)
+ f->op.destroy(f->userdata);
+
+ send_reply_ok(req, NULL, 0);
+}
+
+static int send_notify_iov(struct fuse_ll *f, struct fuse_chan *ch,
+ int notify_code, struct iovec *iov, int count)
+{
+ struct fuse_out_header out;
+
+ out.unique = 0;
+ out.error = notify_code;
+ iov[0].iov_base = &out;
+ iov[0].iov_len = sizeof(struct fuse_out_header);
+ out.len = iov_length(iov, count);
+
+ if (f->debug)
+ fprintf(stderr, "NOTIFY: code=%d count=%d length=%u\n",
+ notify_code, count, out.len);
+
+ return fuse_chan_send(ch, iov, count);
+}
+
+int fuse_lowlevel_notify_poll(struct fuse_pollhandle *ph)
+{
+ if (ph != NULL) {
+ struct fuse_notify_poll_wakeup_out outarg;
+ struct iovec iov[2];
+
+ outarg.kh = ph->kh;
+
+ iov[1].iov_base = &outarg;
+ iov[1].iov_len = sizeof(outarg);
+
+ return send_notify_iov(ph->f, ph->ch, FUSE_NOTIFY_POLL, iov, 2);
+ } else {
+ return 0;
+ }
+}
+
+int fuse_lowlevel_notify_inval_inode(struct fuse_chan *ch, fuse_ino_t ino,
+ off64_t off, off64_t len)
+{
+ struct fuse_notify_inval_inode_out outarg;
+ struct fuse_ll *f;
+ struct iovec iov[2];
+
+ if (!ch)
+ return -EINVAL;
+
+ f = (struct fuse_ll *)fuse_session_data(fuse_chan_session(ch));
+ if (!f)
+ return -ENODEV;
+
+ outarg.ino = ino;
+ outarg.off = off;
+ outarg.len = len;
+
+ iov[1].iov_base = &outarg;
+ iov[1].iov_len = sizeof(outarg);
+
+ return send_notify_iov(f, ch, FUSE_NOTIFY_INVAL_INODE, iov, 2);
+}
+
+int fuse_lowlevel_notify_inval_entry(struct fuse_chan *ch, fuse_ino_t parent,
+ const char *name, size_t namelen)
+{
+ struct fuse_notify_inval_entry_out outarg;
+ struct fuse_ll *f;
+ struct iovec iov[3];
+
+ if (!ch)
+ return -EINVAL;
+
+ f = (struct fuse_ll *)fuse_session_data(fuse_chan_session(ch));
+ if (!f)
+ return -ENODEV;
+
+ outarg.parent = parent;
+ outarg.namelen = namelen;
+ outarg.padding = 0;
+
+ iov[1].iov_base = &outarg;
+ iov[1].iov_len = sizeof(outarg);
+ iov[2].iov_base = (void *)name;
+ iov[2].iov_len = namelen + 1;
+
+ return send_notify_iov(f, ch, FUSE_NOTIFY_INVAL_ENTRY, iov, 3);
+}
+
+void *fuse_req_userdata(fuse_req_t req)
+{
+ return req->f->userdata;
+}
+
+const struct fuse_ctx *fuse_req_ctx(fuse_req_t req)
+{
+ return &req->ctx;
+}
+
+/*
+ * The size of fuse_ctx got extended, so need to be careful about
+ * incompatibility (i.e. a new binary cannot work with an old
+ * library).
+ */
+const struct fuse_ctx *fuse_req_ctx_compat24(fuse_req_t req);
+const struct fuse_ctx *fuse_req_ctx_compat24(fuse_req_t req)
+{
+ return fuse_req_ctx(req);
+}
+FUSE_SYMVER(".symver fuse_req_ctx_compat24,fuse_req_ctx@FUSE_2.4");
+
+
+void fuse_req_interrupt_func(fuse_req_t req, fuse_interrupt_func_t func,
+ void *data)
+{
+ pthread_mutex_lock(&req->lock);
+ pthread_mutex_lock(&req->f->lock);
+ req->u.ni.func = func;
+ req->u.ni.data = data;
+ pthread_mutex_unlock(&req->f->lock);
+ if (req->interrupted && func)
+ func(req, data);
+ pthread_mutex_unlock(&req->lock);
+}
+
+int fuse_req_interrupted(fuse_req_t req)
+{
+ int interrupted;
+
+ pthread_mutex_lock(&req->f->lock);
+ interrupted = req->interrupted;
+ pthread_mutex_unlock(&req->f->lock);
+
+ return interrupted;
+}
+
+static struct {
+ void (*func)(fuse_req_t, fuse_ino_t, const void *);
+ const char *name;
+} fuse_ll_ops[] = {
+ [FUSE_LOOKUP] = { do_lookup, "LOOKUP" },
+ [FUSE_FORGET] = { do_forget, "FORGET" },
+ [FUSE_GETATTR] = { do_getattr, "GETATTR" },
+ [FUSE_SETATTR] = { do_setattr, "SETATTR" },
+ [FUSE_READLINK] = { do_readlink, "READLINK" },
+ [FUSE_SYMLINK] = { do_symlink, "SYMLINK" },
+ [FUSE_MKNOD] = { do_mknod, "MKNOD" },
+ [FUSE_MKDIR] = { do_mkdir, "MKDIR" },
+ [FUSE_UNLINK] = { do_unlink, "UNLINK" },
+ [FUSE_RMDIR] = { do_rmdir, "RMDIR" },
+ [FUSE_RENAME] = { do_rename, "RENAME" },
+ [FUSE_LINK] = { do_link, "LINK" },
+ [FUSE_OPEN] = { do_open, "OPEN" },
+ [FUSE_READ] = { do_read, "READ" },
+ [FUSE_WRITE] = { do_write, "WRITE" },
+ [FUSE_STATFS] = { do_statfs, "STATFS" },
+ [FUSE_RELEASE] = { do_release, "RELEASE" },
+ [FUSE_FSYNC] = { do_fsync, "FSYNC" },
+ [FUSE_SETXATTR] = { do_setxattr, "SETXATTR" },
+ [FUSE_GETXATTR] = { do_getxattr, "GETXATTR" },
+ [FUSE_LISTXATTR] = { do_listxattr, "LISTXATTR" },
+ [FUSE_REMOVEXATTR] = { do_removexattr, "REMOVEXATTR" },
+ [FUSE_FLUSH] = { do_flush, "FLUSH" },
+ [FUSE_INIT] = { do_init, "INIT" },
+ [FUSE_OPENDIR] = { do_opendir, "OPENDIR" },
+ [FUSE_READDIR] = { do_readdir, "READDIR" },
+ [FUSE_RELEASEDIR] = { do_releasedir, "RELEASEDIR" },
+ [FUSE_FSYNCDIR] = { do_fsyncdir, "FSYNCDIR" },
+ [FUSE_GETLK] = { do_getlk, "GETLK" },
+ [FUSE_SETLK] = { do_setlk, "SETLK" },
+ [FUSE_SETLKW] = { do_setlkw, "SETLKW" },
+ [FUSE_ACCESS] = { do_access, "ACCESS" },
+ [FUSE_CREATE] = { do_create, "CREATE" },
+ [FUSE_INTERRUPT] = { do_interrupt, "INTERRUPT" },
+ [FUSE_BMAP] = { do_bmap, "BMAP" },
+ [FUSE_IOCTL] = { do_ioctl, "IOCTL" },
+ [FUSE_POLL] = { do_poll, "POLL" },
+ [FUSE_DESTROY] = { do_destroy, "DESTROY" },
+ [CUSE_INIT] = { cuse_lowlevel_init, "CUSE_INIT" },
+};
+
+#define FUSE_MAXOP (sizeof(fuse_ll_ops) / sizeof(fuse_ll_ops[0]))
+
+static const char *opname(enum fuse_opcode opcode)
+{
+ if (opcode >= FUSE_MAXOP || !fuse_ll_ops[opcode].name)
+ return "???";
+ else
+ return fuse_ll_ops[opcode].name;
+}
+
+static void fuse_ll_process(void *data, const char *buf, size_t len,
+ struct fuse_chan *ch)
+{
+ struct fuse_ll *f = (struct fuse_ll *) data;
+ struct fuse_in_header *in = (struct fuse_in_header *) buf;
+ const void *inarg = buf + sizeof(struct fuse_in_header);
+ struct fuse_req *req;
+ int err;
+
+ if (f->debug)
+ fprintf(stderr,
+ "unique: %llu, opcode: %s (%i), nodeid: %lu, insize: %zu\n",
+ (unsigned long long) in->unique,
+ opname((enum fuse_opcode) in->opcode), in->opcode,
+ (unsigned long) in->nodeid, len);
+
+ req = (struct fuse_req *) calloc(1, sizeof(struct fuse_req));
+ if (req == NULL) {
+ fprintf(stderr, "fuse: failed to allocate request\n");
+ return;
+ }
+
+ req->f = f;
+ req->unique = in->unique;
+ req->ctx.uid = in->uid;
+ req->ctx.gid = in->gid;
+ req->ctx.pid = in->pid;
+ req->ch = ch;
+ req->ctr = 1;
+ list_init_req(req);
+ fuse_mutex_init(&req->lock);
+
+ err = EIO;
+ if (!f->got_init) {
+ enum fuse_opcode expected;
+
+ expected = f->cuse_data ? CUSE_INIT : FUSE_INIT;
+ if (in->opcode != expected)
+ goto reply_err;
+ } else if (in->opcode == FUSE_INIT || in->opcode == CUSE_INIT)
+ goto reply_err;
+
+ err = EACCES;
+ if (f->allow_root && in->uid != f->owner && in->uid != 0 &&
+ in->opcode != FUSE_INIT && in->opcode != FUSE_READ &&
+ in->opcode != FUSE_WRITE && in->opcode != FUSE_FSYNC &&
+ in->opcode != FUSE_RELEASE && in->opcode != FUSE_READDIR &&
+ in->opcode != FUSE_FSYNCDIR && in->opcode != FUSE_RELEASEDIR)
+ goto reply_err;
+
+ err = ENOSYS;
+ if (in->opcode >= FUSE_MAXOP || !fuse_ll_ops[in->opcode].func)
+ goto reply_err;
+ if (in->opcode != FUSE_INTERRUPT) {
+ struct fuse_req *intr;
+ pthread_mutex_lock(&f->lock);
+ intr = check_interrupt(f, req);
+ list_add_req(req, &f->list);
+ pthread_mutex_unlock(&f->lock);
+ if (intr)
+ fuse_reply_err(intr, EAGAIN);
+ }
+ fuse_ll_ops[in->opcode].func(req, in->nodeid, inarg);
+ return;
+
+ reply_err:
+ fuse_reply_err(req, err);
+}
+
+enum {
+ KEY_HELP,
+ KEY_VERSION,
+};
+
+static struct fuse_opt fuse_ll_opts[] = {
+ { "debug", offsetof(struct fuse_ll, debug), 1 },
+ { "-d", offsetof(struct fuse_ll, debug), 1 },
+ { "allow_root", offsetof(struct fuse_ll, allow_root), 1 },
+ { "max_write=%u", offsetof(struct fuse_ll, conn.max_write), 0 },
+ { "max_readahead=%u", offsetof(struct fuse_ll, conn.max_readahead), 0 },
+ { "async_read", offsetof(struct fuse_ll, conn.async_read), 1 },
+ { "sync_read", offsetof(struct fuse_ll, conn.async_read), 0 },
+ { "atomic_o_trunc", offsetof(struct fuse_ll, atomic_o_trunc), 1},
+ { "no_remote_lock", offsetof(struct fuse_ll, no_remote_lock), 1},
+ { "big_writes", offsetof(struct fuse_ll, big_writes), 1},
+ FUSE_OPT_KEY("max_read=", FUSE_OPT_KEY_DISCARD),
+ FUSE_OPT_KEY("-h", KEY_HELP),
+ FUSE_OPT_KEY("--help", KEY_HELP),
+ FUSE_OPT_KEY("-V", KEY_VERSION),
+ FUSE_OPT_KEY("--version", KEY_VERSION),
+ FUSE_OPT_END
+};
+
+static void fuse_ll_version(void)
+{
+ fprintf(stderr, "using FUSE kernel interface version %i.%i\n",
+ FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
+}
+
+static void fuse_ll_help(void)
+{
+ fprintf(stderr,
+" -o max_write=N set maximum size of write requests\n"
+" -o max_readahead=N set maximum readahead\n"
+" -o async_read perform reads asynchronously (default)\n"
+" -o sync_read perform reads synchronously\n"
+" -o atomic_o_trunc enable atomic open+truncate support\n"
+" -o big_writes enable larger than 4kB writes\n"
+" -o no_remote_lock disable remote file locking\n");
+}
+
+static int fuse_ll_opt_proc(void *data, const char *arg, int key,
+ struct fuse_args *outargs)
+{
+ (void) data; (void) outargs;
+
+ switch (key) {
+ case KEY_HELP:
+ fuse_ll_help();
+ break;
+
+ case KEY_VERSION:
+ fuse_ll_version();
+ break;
+
+ default:
+ fprintf(stderr, "fuse: unknown option `%s'\n", arg);
+ }
+
+ return -1;
+}
+
+int fuse_lowlevel_is_lib_option(const char *opt)
+{
+ return fuse_opt_match(fuse_ll_opts, opt);
+}
+
+static void fuse_ll_destroy(void *data)
+{
+ struct fuse_ll *f = (struct fuse_ll *) data;
+
+ if (f->got_init && !f->got_destroy) {
+ if (f->op.destroy)
+ f->op.destroy(f->userdata);
+ }
+
+ pthread_mutex_destroy(&f->lock);
+ free(f->cuse_data);
+ free(f);
+}
+
+/*
+ * always call fuse_lowlevel_new_common() internally, to work around a
+ * misfeature in the FreeBSD runtime linker, which links the old
+ * version of a symbol to internal references.
+ */
+struct fuse_session *fuse_lowlevel_new_common(struct fuse_args *args,
+ const struct fuse_lowlevel_ops *op,
+ size_t op_size, void *userdata)
+{
+ struct fuse_ll *f;
+ struct fuse_session *se;
+ struct fuse_session_ops sop = {
+ .process = fuse_ll_process,
+ .destroy = fuse_ll_destroy,
+ };
+
+ if (sizeof(struct fuse_lowlevel_ops) < op_size) {
+ fprintf(stderr, "fuse: warning: library too old, some operations may not work\n");
+ op_size = sizeof(struct fuse_lowlevel_ops);
+ }
+
+ f = (struct fuse_ll *) calloc(1, sizeof(struct fuse_ll));
+ if (f == NULL) {
+ fprintf(stderr, "fuse: failed to allocate fuse object\n");
+ goto out;
+ }
+
+ f->conn.async_read = 1;
+ f->conn.max_write = UINT_MAX;
+ f->conn.max_readahead = UINT_MAX;
+ f->atomic_o_trunc = 0;
+ list_init_req(&f->list);
+ list_init_req(&f->interrupts);
+ fuse_mutex_init(&f->lock);
+
+ if (fuse_opt_parse(args, f, fuse_ll_opts, fuse_ll_opt_proc) == -1)
+ goto out_free;
+
+ if (f->debug)
+ fprintf(stderr, "FUSE library version: %s\n", PACKAGE_VERSION);
+
+ memcpy(&f->op, op, op_size);
+ f->owner = getuid();
+ f->userdata = userdata;
+
+ se = fuse_session_new(&sop, f);
+ if (!se)
+ goto out_free;
+
+ return se;
+
+out_free:
+ free(f);
+out:
+ return NULL;
+}
+
+
+struct fuse_session *fuse_lowlevel_new(struct fuse_args *args,
+ const struct fuse_lowlevel_ops *op,
+ size_t op_size, void *userdata)
+{
+ return fuse_lowlevel_new_common(args, op, op_size, userdata);
+}
+
+#ifdef linux
+int fuse_req_getgroups(fuse_req_t req, int size, gid_t list[])
+{
+ char *buf;
+ size_t bufsize = 1024;
+ char path[128];
+ int ret;
+ int fd;
+ unsigned long pid = req->ctx.pid;
+ char *s;
+
+ sprintf(path, "/proc/%lu/task/%lu/status", pid, pid);
+
+retry:
+ buf = malloc(bufsize);
+ if (buf == NULL)
+ return -ENOMEM;
+
+ ret = -EIO;
+ fd = open(path, O_RDONLY);
+ if (fd == -1)
+ goto out_free;
+
+ ret = read(fd, buf, bufsize);
+ close(fd);
+ if (ret == -1) {
+ ret = -EIO;
+ goto out_free;
+ }
+
+ if (ret == bufsize) {
+ free(buf);
+ bufsize *= 4;
+ goto retry;
+ }
+
+ ret = -EIO;
+ s = strstr(buf, "\nGroups:");
+ if (s == NULL)
+ goto out_free;
+
+ s += 8;
+ ret = 0;
+ while (1) {
+ char *end;
+ unsigned long val = strtoul(s, &end, 0);
+ if (end == s)
+ break;
+
+ s = end;
+ if (ret < size)
+ list[ret] = val;
+ ret++;
+ }
+
+out_free:
+ free(buf);
+ return ret;
+}
+#else /* linux */
+/*
+ * This is currently not implemented on other than Linux...
+ */
+int fuse_req_getgroups(fuse_req_t req, int size, gid_t list[])
+{
+ return -ENOSYS;
+}
+#endif
+
+#ifndef __FreeBSD__
+
+static void fill_open_compat(struct fuse_open_out *arg,
+ const struct fuse_file_info_compat *f)
+{
+ arg->fh = f->fh;
+ if (f->direct_io)
+ arg->open_flags |= FOPEN_DIRECT_IO;
+ if (f->keep_cache)
+ arg->open_flags |= FOPEN_KEEP_CACHE;
+}
+
+static void convert_statfs_compat(const struct statfs *compatbuf,
+ struct statvfs *buf)
+{
+ buf->f_bsize = compatbuf->f_bsize;
+ buf->f_blocks = compatbuf->f_blocks;
+ buf->f_bfree = compatbuf->f_bfree;
+ buf->f_bavail = compatbuf->f_bavail;
+ buf->f_files = compatbuf->f_files;
+ buf->f_ffree = compatbuf->f_ffree;
+ buf->f_namemax = compatbuf->f_namelen;
+}
+
+int fuse_reply_open_compat(fuse_req_t req,
+ const struct fuse_file_info_compat *f)
+{
+ struct fuse_open_out arg;
+
+ memset(&arg, 0, sizeof(arg));
+ fill_open_compat(&arg, f);
+ return send_reply_ok(req, &arg, sizeof(arg));
+}
+
+int fuse_reply_statfs_compat(fuse_req_t req, const struct statfs *stbuf)
+{
+ struct statvfs newbuf;
+
+ memset(&newbuf, 0, sizeof(newbuf));
+ convert_statfs_compat(stbuf, &newbuf);
+
+ return fuse_reply_statfs(req, &newbuf);
+}
+
+struct fuse_session *fuse_lowlevel_new_compat(const char *opts,
+ const struct fuse_lowlevel_ops_compat *op,
+ size_t op_size, void *userdata)
+{
+ struct fuse_session *se;
+ struct fuse_args args = FUSE_ARGS_INIT(0, NULL);
+
+ if (opts &&
+ (fuse_opt_add_arg(&args, "") == -1 ||
+ fuse_opt_add_arg(&args, "-o") == -1 ||
+ fuse_opt_add_arg(&args, opts) == -1)) {
+ fuse_opt_free_args(&args);
+ return NULL;
+ }
+ se = fuse_lowlevel_new(&args, (const struct fuse_lowlevel_ops *) op,
+ op_size, userdata);
+ fuse_opt_free_args(&args);
+
+ return se;
+}
+
+struct fuse_ll_compat_conf {
+ unsigned max_read;
+ int set_max_read;
+};
+
+static const struct fuse_opt fuse_ll_opts_compat[] = {
+ { "max_read=", offsetof(struct fuse_ll_compat_conf, set_max_read), 1 },
+ { "max_read=%u", offsetof(struct fuse_ll_compat_conf, max_read), 0 },
+ FUSE_OPT_KEY("max_read=", FUSE_OPT_KEY_KEEP),
+ FUSE_OPT_END
+};
+
+int fuse_sync_compat_args(struct fuse_args *args)
+{
+ struct fuse_ll_compat_conf conf;
+
+ memset(&conf, 0, sizeof(conf));
+ if (fuse_opt_parse(args, &conf, fuse_ll_opts_compat, NULL) == -1)
+ return -1;
+
+ if (fuse_opt_insert_arg(args, 1, "-osync_read"))
+ return -1;
+
+ if (conf.set_max_read) {
+ char tmpbuf[64];
+
+ sprintf(tmpbuf, "-omax_readahead=%u", conf.max_read);
+ if (fuse_opt_insert_arg(args, 1, tmpbuf) == -1)
+ return -1;
+ }
+ return 0;
+}
+
+FUSE_SYMVER(".symver fuse_reply_statfs_compat,fuse_reply_statfs@FUSE_2.4");
+FUSE_SYMVER(".symver fuse_reply_open_compat,fuse_reply_open@FUSE_2.4");
+FUSE_SYMVER(".symver fuse_lowlevel_new_compat,fuse_lowlevel_new@FUSE_2.4");
+
+#else /* __FreeBSD__ */
+
+int fuse_sync_compat_args(struct fuse_args *args)
+{
+ (void) args;
+ return 0;
+}
+
+#endif /* __FreeBSD__ */
+
+struct fuse_session *fuse_lowlevel_new_compat25(struct fuse_args *args,
+ const struct fuse_lowlevel_ops_compat25 *op,
+ size_t op_size, void *userdata)
+{
+ if (fuse_sync_compat_args(args) == -1)
+ return NULL;
+
+ return fuse_lowlevel_new_common(args,
+ (const struct fuse_lowlevel_ops *) op,
+ op_size, userdata);
+}
+
+FUSE_SYMVER(".symver fuse_lowlevel_new_compat25,fuse_lowlevel_new@FUSE_2.5");