[PATCH v3] erofs-utils: add support for fuse 2/3 lowlevel API
Li Yiyan
lyy0627 at sjtu.edu.cn
Tue Jul 25 22:18:38 AEST 2023
Add support for fuse2/3 lowlevel API in erofsfuse,
pass the make check test in experimental-test branch.
Conduct performance evaluation, providing higher
performance compared to highlevel API. Compatible with
fuse 2(>=2.6) and 3(>=3.0)
Signed-off-by: Li Yiyan <lyy0627 at sjtu.edu.cn>
---
Changes since v2:
- merge lowlevel.c into main.c
- fix typo in autoconf
- optimize naming
- remove redundant code
- avoid global sbi dependencies
Changes since v1:
- remove highlevel fallback path
- remove redundant code
- add static for erofsfuse_ll_func
---
configure.ac | 23 +-
fuse/Makefile.am | 4 +-
fuse/main.c | 624 +++++++++++++++++++++++++++++++++++++----------
3 files changed, 516 insertions(+), 135 deletions(-)
diff --git a/configure.ac b/configure.ac
index a8cecd0..6d08d96 100644
--- a/configure.ac
+++ b/configure.ac
@@ -336,15 +336,26 @@ AS_IF([test "x$with_selinux" != "xno"], [
# Configure fuse
AS_IF([test "x$enable_fuse" != "xno"], [
- PKG_CHECK_MODULES([libfuse], [fuse >= 2.6])
# Paranoia: don't trust the result reported by pkgconfig before trying out
saved_LIBS="$LIBS"
saved_CPPFLAGS=${CPPFLAGS}
- CPPFLAGS="${libfuse_CFLAGS} ${CPPFLAGS}"
- LIBS="${libfuse_LIBS} $LIBS"
- AC_CHECK_LIB(fuse, fuse_main, [
- have_fuse="yes" ], [
- AC_MSG_ERROR([libfuse (>= 2.6) doesn't work properly])])
+ PKG_CHECK_MODULES([libfuse3], [fuse3 >= 3.0], [
+ AC_DEFINE([FUSE_USE_VERSION], [30], [used FUSE API version])
+ CPPFLAGS="${libfuse3_CFLAGS} ${CPPFLAGS}"
+ LIBS="${libfuse3_LIBS} $LIBS"
+ AC_CHECK_LIB(fuse3, fuse_session_new, [], [
+ AC_MSG_ERROR([libfuse3 (>= 3.0) doesn't work properly for lowlevel api])])
+ have_fuse="yes"
+ ], [
+ PKG_CHECK_MODULES([libfuse2], [fuse >= 2.6], [
+ AC_DEFINE([FUSE_USE_VERSION], [26], [used FUSE API version])
+ CPPFLAGS="${libfuse2_CFLAGS} ${CPPFLAGS}"
+ LIBS="${libfuse2_LIBS} $LIBS"
+ AC_CHECK_LIB(fuse, fuse_lowlevel_new, [], [
+ AC_MSG_ERROR([libfuse (>= 2.6) doesn't work properly for lowlevel api])])
+ have_fuse="yes"
+ ], [have_fuse="no"])
+ ])
LIBS="${saved_LIBS}"
CPPFLAGS="${saved_CPPFLAGS}"], [have_fuse="no"])
diff --git a/fuse/Makefile.am b/fuse/Makefile.am
index 50be783..c63efcd 100644
--- a/fuse/Makefile.am
+++ b/fuse/Makefile.am
@@ -5,6 +5,6 @@ noinst_HEADERS = $(top_srcdir)/fuse/macosx.h
bin_PROGRAMS = erofsfuse
erofsfuse_SOURCES = main.c
erofsfuse_CFLAGS = -Wall -I$(top_srcdir)/include
-erofsfuse_CFLAGS += -DFUSE_USE_VERSION=26 ${libfuse_CFLAGS} ${libselinux_CFLAGS}
-erofsfuse_LDADD = $(top_builddir)/lib/liberofs.la ${libfuse_LIBS} ${liblz4_LIBS} \
+erofsfuse_CFLAGS += ${libfuse2_CFLAGS} ${libfuse3_CFLAGS} ${libselinux_CFLAGS}
+erofsfuse_LDADD = $(top_builddir)/lib/liberofs.la ${libfuse2_LIBS} ${libfuse3_LIBS} ${liblz4_LIBS} \
${libselinux_LIBS} ${liblzma_LIBS} ${zlib_LIBS} ${libdeflate_LIBS}
diff --git a/fuse/main.c b/fuse/main.c
index 821d98c..37bd3ab 100644
--- a/fuse/main.c
+++ b/fuse/main.c
@@ -1,13 +1,12 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Created by Li Guifu <blucerlee at gmail.com>
+ * Lowlevel implemented by Li Yiyan <lyy0627 at sjtu.edu.com>
*/
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <libgen.h>
-#include <fuse.h>
-#include <fuse_opt.h>
#include "macosx.h"
#include "erofs/config.h"
#include "erofs/print.h"
@@ -15,180 +14,514 @@
#include "erofs/dir.h"
#include "erofs/inode.h"
-struct erofsfuse_dir_context {
+#include <float.h>
+#include <fuse.h>
+#include <fuse_lowlevel.h>
+
+/* used in list/getxattr, given buf size is 0 and
+ * expected return val is xattr size
+ */
+#define EROFSFUSE_XATTR_BUF_SIZE 4096
+#define EROFSFUSE_TIMEOUT DBL_MAX
+
+struct erofsfuse_ll_dir_context {
struct erofs_dir_context ctx;
- fuse_fill_dir_t filler;
- struct fuse_file_info *fi;
+
+ fuse_req_t req;
void *buf;
+ int is_plus;
+ size_t offset;
+ size_t buf_size;
+ size_t start_off;
+ struct fuse_file_info *fi;
+};
+
+struct erofsfuse_ll_dir_search_context {
+ struct erofs_dir_context ctx;
+
+ const char *target_name;
+ struct fuse_entry_param *ent;
};
-static int erofsfuse_fill_dentries(struct erofs_dir_context *ctx)
+static int erofsfuse_ll_fill_dentries(struct erofs_dir_context *ctx)
{
- struct erofsfuse_dir_context *fusectx = (void *)ctx;
- struct stat st = {0};
+ size_t r = 0;
+ struct stat st = { 0 };
char dname[EROFS_NAME_LEN + 1];
+ struct erofsfuse_ll_dir_context *fusectx =
+ (struct erofsfuse_ll_dir_context *)ctx;
+
+ if (fusectx->offset < fusectx->start_off) {
+ fusectx->offset +=
+ ctx->de_namelen + sizeof(struct erofs_dirent);
+ return 0;
+ }
strncpy(dname, ctx->dname, ctx->de_namelen);
dname[ctx->de_namelen] = '\0';
- st.st_mode = erofs_ftype_to_dtype(ctx->de_ftype) << 12;
- fusectx->filler(fusectx->buf, dname, &st, 0);
+ fusectx->offset += ctx->de_namelen + sizeof(struct erofs_dirent);
+
+ if (!fusectx->is_plus) { /* fuse 3 still use non-plus readdir */
+ st.st_mode = erofs_ftype_to_dtype(ctx->de_ftype);
+ st.st_ino = ctx->de_nid;
+
+ r = fuse_add_direntry(fusectx->req, fusectx->buf,
+ fusectx->buf_size, dname, &st,
+ fusectx->offset);
+ } else {
+#if FUSE_MAJOR_VERSION >= 3
+ struct fuse_entry_param param;
+
+ param.ino = ctx->de_nid;
+ param.generation = 0;
+ param.attr.st_ino = ctx->de_nid;
+ param.attr.st_mode = erofs_ftype_to_dtype(ctx->de_ftype);
+ param.attr_timeout = EROFSFUSE_TIMEOUT;
+ param.entry_timeout = EROFSFUSE_TIMEOUT;
+
+ r = fuse_add_direntry_plus(fusectx->req, fusectx->buf,
+ fusectx->buf_size, dname, ¶m,
+ fusectx->offset);
+#else
+ erofs_err("fuse 2 readdirplus is not supported\n");
+#endif
+ }
+
+ if (r > fusectx->buf_size) {
+ fusectx->offset -=
+ ctx->de_namelen + sizeof(struct erofs_dirent);
+ return 1;
+ }
+ fusectx->buf += r;
+ fusectx->buf_size -= r;
return 0;
}
-int erofsfuse_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
- off_t offset, struct fuse_file_info *fi)
+static void erofsfuse_ll_fill_stat(struct erofs_inode *vi, struct stat *stbuf)
{
- int ret;
- struct erofs_inode dir;
- struct erofsfuse_dir_context ctx = {
- .ctx.dir = &dir,
- .ctx.cb = erofsfuse_fill_dentries,
- .filler = filler,
- .fi = fi,
- .buf = buf,
- };
- erofs_dbg("readdir:%s offset=%llu", path, (long long)offset);
-
- dir.sbi = &sbi;
- ret = erofs_ilookup(path, &dir);
- if (ret)
- return ret;
+ stbuf->st_mode = vi->i_mode;
+ stbuf->st_nlink = vi->i_nlink;
- erofs_dbg("path=%s nid = %llu", path, dir.nid | 0ULL);
- if (!S_ISDIR(dir.i_mode))
- return -ENOTDIR;
+ if (!S_ISDIR(stbuf->st_mode))
+ stbuf->st_size = vi->i_size;
+ if (S_ISBLK(vi->i_mode) || S_ISCHR(vi->i_mode))
+ stbuf->st_rdev = vi->u.i_rdev;
+
+ stbuf->st_blocks = roundup(vi->i_size, erofs_blksiz(&sbi)) >> 9;
+
+ stbuf->st_uid = vi->i_uid;
+ stbuf->st_gid = vi->i_gid;
+
+ stbuf->st_ctime = vi->i_mtime;
+ stbuf->st_mtime = stbuf->st_ctime;
+ stbuf->st_atime = stbuf->st_ctime;
+}
+
+static int erofsfuse_ll_search_dentries(struct erofs_dir_context *ctx)
+{
+ int r = 0;
+ struct erofs_inode vi = { .sbi = &sbi };
+ struct erofsfuse_ll_dir_search_context *search_ctx =
+ (struct erofsfuse_ll_dir_search_context *)ctx;
+
+ if (search_ctx->ent->ino == 0 &&
+ strlen(search_ctx->target_name) == ctx->de_namelen &&
+ !strncmp(search_ctx->target_name, ctx->dname, ctx->de_namelen)) {
+ search_ctx->ent->ino = ctx->de_nid;
+ search_ctx->ent->attr.st_ino = ctx->de_nid;
+ vi.nid = (erofs_nid_t)ctx->de_nid;
+
+ r = erofs_read_inode_from_disk(&vi);
+ if (r < 0)
+ return r;
+
+ erofsfuse_ll_fill_stat(&vi, &(search_ctx->ent->attr));
+ }
+
+ return 0;
+}
+
+static inline erofs_nid_t erofsfuse_ll_getnid(fuse_ino_t ino)
+{
+ return ino == FUSE_ROOT_ID ? sbi.root_nid : (erofs_nid_t)ino;
+}
+
+static inline void erofsfuse_readdir_general(fuse_req_t req, fuse_ino_t ino,
+ size_t size, off_t off,
+ struct fuse_file_info *fi,
+ int plus)
+{
+ int err = 0;
+ char *buf = malloc(size);
+ struct erofsfuse_ll_dir_context ctx;
+ struct erofs_inode *vi = (struct erofs_inode *)fi->fh;
+
+ erofs_dbg("readdir, ino: %lu, req: %p, fh: %lu, size: %lu, off: %lu\n",
+ ino, req, fi->fh, size, off);
+ if (!buf) {
+ fuse_reply_err(req, ENOMEM);
+ return;
+ }
+ ctx.ctx.dir = vi;
+ ctx.ctx.cb = erofsfuse_ll_fill_dentries;
+
+ ctx.fi = fi;
+ ctx.buf = buf;
+ ctx.buf_size = size;
+ ctx.req = req;
+ ctx.offset = 0;
+ ctx.start_off = off;
+ ctx.is_plus = plus;
- if (!dir.i_size)
- return 0;
#ifdef NDEBUG
- return erofs_iterate_dir(&ctx.ctx, false);
+ err = erofs_iterate_dir(&ctx.ctx, false);
#else
- return erofs_iterate_dir(&ctx.ctx, true);
+ err = erofs_iterate_dir(&ctx.ctx, true);
#endif
+
+ if (err < 0) /* if buffer insufficient, return 1 */
+ fuse_reply_err(req, EIO);
+ else
+ fuse_reply_buf(req, buf, size - ctx.buf_size);
+
+ free(buf);
+}
+
+static void erofsfuse_ll_readdir(fuse_req_t req, fuse_ino_t ino, size_t size,
+ off_t off, struct fuse_file_info *fi)
+{
+ erofsfuse_readdir_general(req, ino, size, off, fi, 0);
}
-static void *erofsfuse_init(struct fuse_conn_info *info)
+#if FUSE_MAJOR_VERSION >= 3
+static void erofsfuse_ll_readdirplus(fuse_req_t req, fuse_ino_t ino,
+ size_t size, off_t off,
+ struct fuse_file_info *fi)
{
- erofs_info("Using FUSE protocol %d.%d", info->proto_major, info->proto_minor);
- return NULL;
+ erofsfuse_readdir_general(req, ino, size, off, fi, 1);
}
+#endif
-static int erofsfuse_open(const char *path, struct fuse_file_info *fi)
+static void erofsfuse_ll_init(void *userdata, struct fuse_conn_info *conn)
{
- erofs_dbg("open path=%s", path);
+ erofs_dbg("init fuse lowlevel erofs\n");
+}
- if ((fi->flags & O_ACCMODE) != O_RDONLY)
- return -EACCES;
+static void erofsfuse_ll_open(fuse_req_t req, fuse_ino_t ino,
+ struct fuse_file_info *fi)
+{
+ int ret = 0;
+ struct erofs_inode *vi;
- return 0;
+ erofs_dbg("open, ino = %lu, req = %p\n", ino, req);
+ if (fi->flags & (O_WRONLY | O_RDWR)) {
+ fuse_reply_err(req, EROFS);
+ return;
+ }
+
+ if (ino == FUSE_ROOT_ID) {
+ fuse_reply_err(req, EISDIR);
+ return;
+ }
+
+ vi = (struct erofs_inode *)malloc(sizeof(struct erofs_inode));
+ if (!vi) {
+ fuse_reply_err(req, ENOMEM);
+ return;
+ }
+
+ vi->sbi = &sbi;
+ vi->nid = (erofs_nid_t)ino;
+ ret = erofs_read_inode_from_disk(vi);
+ if (ret < 0) {
+ fuse_reply_err(req, EIO);
+ goto out;
+ }
+
+ if (!S_ISREG(vi->i_mode)) {
+ fuse_reply_err(req, EISDIR);
+ } else {
+ fi->fh = (uint64_t)vi;
+ fi->keep_cache = 1;
+ fuse_reply_open(req, fi);
+ return;
+ }
+
+out:
+ free(vi);
}
-static int erofsfuse_getattr(const char *path, struct stat *stbuf)
+static void erofsfuse_ll_getattr(fuse_req_t req, fuse_ino_t ino,
+ struct fuse_file_info *fi)
{
- struct erofs_inode vi = { .sbi = &sbi };
int ret;
+ struct stat stbuf = { 0 };
+ struct erofs_inode vi = { .sbi = &sbi };
- erofs_dbg("getattr(%s)", path);
- ret = erofs_ilookup(path, &vi);
- if (ret)
- return -ENOENT;
-
- stbuf->st_mode = vi.i_mode;
- stbuf->st_nlink = vi.i_nlink;
- stbuf->st_size = vi.i_size;
- stbuf->st_blocks = roundup(vi.i_size, erofs_blksiz(vi.sbi)) >> 9;
- stbuf->st_uid = vi.i_uid;
- stbuf->st_gid = vi.i_gid;
- if (S_ISBLK(vi.i_mode) || S_ISCHR(vi.i_mode))
- stbuf->st_rdev = vi.u.i_rdev;
- stbuf->st_ctime = vi.i_mtime;
- stbuf->st_mtime = stbuf->st_ctime;
- stbuf->st_atime = stbuf->st_ctime;
- return 0;
+ erofs_dbg("getattr, ino: %lu, req: %p\n", ino, req);
+ vi.nid = erofsfuse_ll_getnid(ino);
+ ret = erofs_read_inode_from_disk(&vi);
+ if (ret < 0) {
+ erofs_dbg("read inode from disk failed, nid = %lu\n", vi.nid);
+ fuse_reply_err(req, ENOENT);
+ }
+
+ erofsfuse_ll_fill_stat(&vi, &stbuf);
+ stbuf.st_ino = ino;
+
+ fuse_reply_attr(req, &stbuf, EROFSFUSE_TIMEOUT);
}
-static int erofsfuse_read(const char *path, char *buffer,
- size_t size, off_t offset,
- struct fuse_file_info *fi)
+static void erofsfuse_ll_opendir(fuse_req_t req, fuse_ino_t ino,
+ struct fuse_file_info *fi)
{
int ret;
- struct erofs_inode vi;
+ struct erofs_inode *vi;
- erofs_dbg("path:%s size=%zd offset=%llu", path, size, (long long)offset);
+ erofs_dbg("opendir, ino = %lu\n", ino);
+ vi = (struct erofs_inode *)malloc(sizeof(struct erofs_inode));
+ if (!vi) {
+ fuse_reply_err(req, ENOMEM);
+ return;
+ }
- vi.sbi = &sbi;
- ret = erofs_ilookup(path, &vi);
- if (ret)
- return ret;
+ vi->sbi = &sbi;
+ vi->nid = erofsfuse_ll_getnid(ino);
+ ret = erofs_read_inode_from_disk(vi);
+ if (ret < 0) {
+ fuse_reply_err(req, EIO);
+ goto out;
+ }
- ret = erofs_pread(&vi, buffer, size, offset);
- if (ret)
- return ret;
- if (offset >= vi.i_size)
- return 0;
- if (offset + size > vi.i_size)
- return vi.i_size - offset;
- return size;
+ if (!S_ISDIR(vi->i_mode)) {
+ fuse_reply_err(req, ENOTDIR);
+ goto out;
+ }
+
+ fi->fh = (uint64_t)vi;
+ fuse_reply_open(req, fi);
+ return;
+
+out:
+ free(vi);
}
-static int erofsfuse_readlink(const char *path, char *buffer, size_t size)
+static void erofsfuse_ll_release(fuse_req_t req, fuse_ino_t ino,
+ struct fuse_file_info *fi)
{
- int ret = erofsfuse_read(path, buffer, size, 0, NULL);
-
- if (ret < 0)
- return ret;
- DBG_BUGON(ret > size);
- if (ret == size)
- buffer[size - 1] = '\0';
- erofs_dbg("readlink(%s): %s", path, buffer);
- return 0;
+ free((struct erofs_inode *)fi->fh);
+ fi->fh = 0;
+ fuse_reply_err(req, 0);
}
-static int erofsfuse_getxattr(const char *path, const char *name, char *value,
- size_t size
-#ifdef __APPLE__
- , uint32_t position)
+static void erofsfuse_ll_lookup(fuse_req_t req, fuse_ino_t parent,
+ const char *name)
+{
+ int err, ret;
+ struct erofs_inode *vi;
+ struct fuse_entry_param fentry;
+ struct erofsfuse_ll_dir_search_context ctx;
+
+ vi = (struct erofs_inode *)malloc(sizeof(struct erofs_inode));
+ if (!vi) {
+ fuse_reply_err(req, ENOMEM);
+ return;
+ }
+
+ vi->sbi = &sbi;
+ vi->nid = erofsfuse_ll_getnid(parent);
+ ret = erofs_read_inode_from_disk(vi);
+ if (ret < 0) {
+ fuse_reply_err(req, EIO);
+ goto out;
+ }
+ if (!S_ISDIR(vi->i_mode)) {
+ fuse_reply_err(req, ENOTDIR);
+ goto out;
+ }
+
+ memset(&fentry, 0, sizeof(fentry));
+ fentry.ino = 0;
+ fentry.attr_timeout = fentry.entry_timeout = EROFSFUSE_TIMEOUT;
+ ctx.ctx.dir = vi;
+ ctx.ctx.cb = erofsfuse_ll_search_dentries;
+
+ ctx.ent = &fentry;
+ ctx.target_name = name;
+
+#ifdef NDEBUG
+ err = erofs_iterate_dir(&ctx.ctx, false);
#else
- )
+ err = erofs_iterate_dir(&ctx.ctx, true);
#endif
+
+ if (err < 0) {
+ fuse_reply_err(req, EIO);
+ goto out;
+ }
+ fuse_reply_entry(req, &fentry);
+
+out:
+ free(vi);
+}
+
+static void erofsfuse_ll_read(fuse_req_t req, fuse_ino_t ino, size_t size,
+ off_t off, struct fuse_file_info *fi)
{
int ret;
- struct erofs_inode vi;
+ struct erofs_inode *vi = (struct erofs_inode *)fi->fh;
+ char *buf = malloc(size);
+
+ erofs_dbg("read, ino = %lu, size = %lu, off = %lu, fh = %lu\n", ino,
+ size, off, fi->fh);
+ if (!buf) {
+ fuse_reply_err(req, ENOMEM);
+ return;
+ }
- erofs_dbg("getxattr(%s): name=%s size=%llu", path, name, size);
+ if (!S_ISREG(vi->i_mode)) {
+ fuse_reply_err(req, EIO);
+ goto out;
+ }
- vi.sbi = &sbi;
- ret = erofs_ilookup(path, &vi);
- if (ret)
- return ret;
+ ret = erofs_pread(vi, buf, size, off);
+ if (ret) {
+ fuse_reply_err(req, EIO);
+ goto out;
+ }
+ if (off >= vi->i_size)
+ ret = 0;
+ else if (off + size > vi->i_size)
+ ret = vi->i_size - off;
+ else
+ ret = size;
- return erofs_getxattr(&vi, name, value, size);
+ fuse_reply_buf(req, buf, ret);
+
+out:
+ free(buf);
}
-static int erofsfuse_listxattr(const char *path, char *list, size_t size)
+static void erofsfuse_ll_readlink(fuse_req_t req, fuse_ino_t ino)
{
int ret;
- struct erofs_inode vi;
+ char *dst;
+ struct erofs_inode vi = { .sbi = &sbi };
- erofs_dbg("listxattr(%s): size=%llu", path, size);
+ erofs_dbg("read_link, ino = %lu\n", ino);
+ vi.nid = erofsfuse_ll_getnid(ino);
+ ret = erofs_read_inode_from_disk(&vi);
+ if (ret < 0) {
+ fuse_reply_err(req, EIO);
+ return;
+ }
- vi.sbi = &sbi;
- ret = erofs_ilookup(path, &vi);
- if (ret)
- return ret;
+ if (!S_ISLNK(vi.i_mode)) {
+ fuse_reply_err(req, EINVAL);
+ return;
+ }
+
+ dst = malloc(vi.i_size + 1);
+ if (!dst) {
+ fuse_reply_err(req, ENOMEM);
+ return;
+ }
+
+ ret = erofs_pread(&vi, dst, vi.i_size, 0);
+ if (ret < 0) {
+ fuse_reply_err(req, EIO);
+ goto out;
+ }
- return erofs_listxattr(&vi, list, size);
+ dst[vi.i_size] = '\0';
+ fuse_reply_readlink(req, dst);
+
+out:
+ free(dst);
+}
+
+static void erofsfuse_ll_getxattr(fuse_req_t req, fuse_ino_t ino,
+ const char *name, size_t size)
+{
+ int ret;
+ char *buf = NULL;
+ struct erofs_inode vi = { .sbi = &sbi };
+ size_t real = size == 0 ? EROFSFUSE_XATTR_BUF_SIZE : size;
+
+ erofs_dbg("getxattr, ino = %lu, name = %s, size = %lu\n", ino, name,
+ size);
+ vi.nid = erofsfuse_ll_getnid(ino);
+ ret = erofs_read_inode_from_disk(&vi);
+ if (ret < 0) {
+ fuse_reply_err(req, EIO);
+ return;
+ }
+
+ buf = malloc(real);
+ if (!buf) {
+ fuse_reply_err(req, ENOMEM);
+ return;
+ }
+
+ ret = erofs_getxattr(&vi, name, buf, real);
+ if (ret < 0)
+ fuse_reply_err(req, -ret);
+ else if (size == 0)
+ fuse_reply_xattr(req, ret);
+ else
+ fuse_reply_buf(req, buf, ret);
+
+ free(buf);
+}
+
+static void erofsfuse_ll_listxattr(fuse_req_t req, fuse_ino_t ino, size_t size)
+{
+ int ret;
+ char *buf = NULL;
+ struct erofs_inode vi = { .sbi = &sbi };
+ size_t real = size == 0 ? EROFSFUSE_XATTR_BUF_SIZE : size;
+
+ erofs_dbg("listxattr, ino = %lu, size = %lu\n", ino, size);
+ vi.nid = erofsfuse_ll_getnid(ino);
+ ret = erofs_read_inode_from_disk(&vi);
+ if (ret < 0) {
+ fuse_reply_err(req, EIO);
+ return;
+ }
+
+ buf = malloc(real);
+ if (!buf) {
+ fuse_reply_err(req, ENOMEM);
+ return;
+ }
+
+ ret = erofs_listxattr(&vi, buf, real);
+ if (ret < 0)
+ fuse_reply_err(req, -ret);
+ else if (size == 0)
+ fuse_reply_xattr(req, ret);
+ else
+ fuse_reply_buf(req, buf, ret);
+
+ free(buf);
}
-static struct fuse_operations erofs_ops = {
- .getxattr = erofsfuse_getxattr,
- .listxattr = erofsfuse_listxattr,
- .readlink = erofsfuse_readlink,
- .getattr = erofsfuse_getattr,
- .readdir = erofsfuse_readdir,
- .open = erofsfuse_open,
- .read = erofsfuse_read,
- .init = erofsfuse_init,
+struct fuse_lowlevel_ops erofsfuse_lops = {
+ .getxattr = erofsfuse_ll_getxattr,
+ .opendir = erofsfuse_ll_opendir,
+ .releasedir = erofsfuse_ll_release,
+ .release = erofsfuse_ll_release,
+ .lookup = erofsfuse_ll_lookup,
+ .listxattr = erofsfuse_ll_listxattr,
+ .readlink = erofsfuse_ll_readlink,
+ .getattr = erofsfuse_ll_getattr,
+ .readdir = erofsfuse_ll_readdir,
+#if FUSE_MAJOR_VERSION >= 3
+ .readdirplus = erofsfuse_ll_readdirplus,
+#endif
+ .open = erofsfuse_ll_open,
+ .read = erofsfuse_ll_read,
+ .init = erofsfuse_ll_init,
};
static struct options {
@@ -200,18 +533,20 @@ static struct options {
bool odebug;
} fusecfg;
-#define OPTION(t, p) { t, offsetof(struct options, p), 1 }
+#define OPTION(t, p) \
+ { \
+ t, offsetof(struct options, p), 1 \
+ }
static const struct fuse_opt option_spec[] = {
- OPTION("--offset=%lu", offset),
- OPTION("--dbglevel=%u", debug_lvl),
- OPTION("--help", show_help),
- FUSE_OPT_KEY("--device=", 1),
- FUSE_OPT_END
+ OPTION("--offset=%lu", offset), OPTION("--dbglevel=%u", debug_lvl),
+ OPTION("--help", show_help), FUSE_OPT_KEY("--device=", 1), FUSE_OPT_END
};
static void usage(void)
{
+#if FUSE_MAJOR_VERSION < 3
struct fuse_args args = FUSE_ARGS_INIT(0, NULL);
+#endif
fputs("usage: [options] IMAGE MOUNTPOINT\n\n"
"Options:\n"
@@ -221,7 +556,8 @@ static void usage(void)
#if FUSE_MAJOR_VERSION < 3
" --help display this help and exit\n"
#endif
- "\n", stderr);
+ "\n",
+ stderr);
#if FUSE_MAJOR_VERSION >= 3
fuse_cmdline_help();
@@ -261,8 +597,10 @@ static int optional_opt_func(void *data, const char *arg, int key,
fusecfg.disk = strdup(arg);
return 0;
}
- if (!fusecfg.mountpoint)
+ if (!fusecfg.mountpoint) {
fusecfg.mountpoint = strdup(arg);
+ return 0;
+ }
case FUSE_OPT_KEY_OPT:
if (!strcmp(arg, "-d"))
fusecfg.odebug = true;
@@ -301,10 +639,11 @@ static void signal_handle_sigsegv(int signal)
int main(int argc, char *argv[])
{
int ret;
+ struct fuse_session *se;
struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
erofs_init_configure();
- printf("%s %s\n", basename(argv[0]), cfg.c_version);
+ erofs_dbg("%s %s\n", basename(argv[0]), cfg.c_version);
#if defined(HAVE_EXECINFO_H) && defined(HAVE_BACKTRACE)
if (signal(SIGSEGV, signal_handle_sigsegv) == SIG_ERR) {
@@ -341,7 +680,38 @@ int main(int argc, char *argv[])
goto err_dev_close;
}
- ret = fuse_main(args.argc, args.argv, &erofs_ops, NULL);
+#if FUSE_MAJOR_VERSION >= 3
+ se = fuse_session_new(&args, &erofsfuse_lops, sizeof(erofsfuse_lops),
+ NULL);
+ if (se != NULL) {
+ fuse_set_signal_handlers(se);
+ fuse_session_mount(se, fusecfg.mountpoint);
+
+ ret = fuse_session_loop(se);
+
+ fuse_remove_signal_handlers(se);
+ fuse_session_unmount(se);
+ fuse_session_destroy(se);
+ }
+#else
+ struct fuse_chan *ch;
+
+ ch = fuse_mount(fusecfg.mountpoint, &args);
+ if (ch != NULL) {
+ se = fuse_lowlevel_new(&args, &erofsfuse_lops,
+ sizeof(erofsfuse_lops), NULL);
+ if (se != NULL) {
+ if (fuse_set_signal_handlers(se) != -1) {
+ fuse_session_add_chan(se, ch);
+ ret = fuse_session_loop(se);
+ fuse_remove_signal_handlers(se);
+ fuse_session_remove_chan(ch);
+ }
+ fuse_session_destroy(se);
+ }
+ fuse_unmount(fusecfg.mountpoint, ch);
+ }
+#endif
erofs_put_super(&sbi);
err_dev_close:
--
2.34.1
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