FUSE-based exFAT implementation. Requires FUSE 2.6 or later.
Free exFAT implementation.
- Copyright (C) 2010-2013 Andrew Nayenko
+ Copyright (C) 2010-2018 Andrew Nayenko
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
+#include <exfat.h>
#define FUSE_USE_VERSION 26
#include <fuse.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <exfat.h>
#include <inttypes.h>
#include <limits.h>
#include <sys/types.h>
#include <pwd.h>
#include <unistd.h>
-#define exfat_debug(format, ...)
+#ifndef DEBUG
+ #define exfat_debug(format, ...)
+#endif
#if !defined(FUSE_VERSION) || (FUSE_VERSION < 26)
#error FUSE 2.6 or later is required
#endif
const char* default_options = "ro_fallback,allow_other,blkdev,big_writes,"
- "defer_permissions";
+ "default_permissions";
struct exfat ef;
static void set_node(struct fuse_file_info* fi, struct exfat_node* node)
{
fi->fh = (uint64_t) (size_t) node;
+ fi->keep_cache = 1;
}
static int fuse_exfat_getattr(const char* path, struct stat* stbuf)
return rc;
rc = exfat_truncate(&ef, node, size, true);
+ if (rc != 0)
+ {
+ exfat_flush_node(&ef, node); /* ignore return code */
+ exfat_put_node(&ef, node);
+ return rc;
+ }
+ rc = exfat_flush_node(&ef, node);
exfat_put_node(&ef, node);
return rc;
}
struct exfat_node* node;
struct exfat_iterator it;
int rc;
- char name[UTF8_BYTES(EXFAT_NAME_MAX) + 1];
+ char name[EXFAT_UTF8_NAME_BUFFER_MAX];
+ struct stat stbuf;
exfat_debug("[%s] %s", __func__, path);
rc = exfat_lookup(&ef, &parent, path);
if (rc != 0)
return rc;
- if (!(parent->flags & EXFAT_ATTRIB_DIR))
+ if (!(parent->attrib & EXFAT_ATTRIB_DIR))
{
exfat_put_node(&ef, parent);
- exfat_error("`%s' is not a directory (0x%x)", path, parent->flags);
+ exfat_error("'%s' is not a directory (%#hx)", path, parent->attrib);
return -ENOTDIR;
}
if (rc != 0)
{
exfat_put_node(&ef, parent);
- exfat_error("failed to open directory `%s'", path);
+ exfat_error("failed to open directory '%s'", path);
return rc;
}
- while ((node = exfat_readdir(&ef, &it)))
+ while ((node = exfat_readdir(&it)))
{
- exfat_get_name(node, name, sizeof(name) - 1);
+ exfat_get_name(node, name);
exfat_debug("[%s] %s: %s, %"PRId64" bytes, cluster 0x%x", __func__,
- name, IS_CONTIGUOUS(*node) ? "contiguous" : "fragmented",
+ name, node->is_contiguous ? "contiguous" : "fragmented",
node->size, node->start_cluster);
- filler(buffer, name, NULL, 0);
+ exfat_stat(&ef, node, &stbuf);
+ filler(buffer, name, &stbuf, 0);
exfat_put_node(&ef, node);
}
exfat_closedir(&ef, &it);
if (rc != 0)
return rc;
set_node(fi, node);
- fi->keep_cache = 1;
+ return 0;
+}
+
+static int fuse_exfat_create(const char* path, mode_t mode,
+ struct fuse_file_info* fi)
+{
+ struct exfat_node* node;
+ int rc;
+
+ exfat_debug("[%s] %s 0%ho", __func__, path, mode);
+
+ rc = exfat_mknod(&ef, path);
+ if (rc != 0)
+ return rc;
+ rc = exfat_lookup(&ef, &node, path);
+ if (rc != 0)
+ return rc;
+ set_node(fi, node);
return 0;
}
static int fuse_exfat_release(const char* path, struct fuse_file_info* fi)
{
+ /*
+ This handler is called by FUSE on close() syscall. If the FUSE
+ implementation does not call flush handler, we will flush node here.
+ But in this case we will not be able to return an error to the caller.
+ See fuse_exfat_flush() below.
+ */
exfat_debug("[%s] %s", __func__, path);
+ exfat_flush_node(&ef, get_node(fi));
exfat_put_node(&ef, get_node(fi));
- return 0;
+ return 0; /* FUSE ignores this return value */
+}
+
+static int fuse_exfat_flush(const char* path, struct fuse_file_info* fi)
+{
+ /*
+ This handler may be called by FUSE on close() syscall. FUSE also deals
+ with removals of open files, so we don't free clusters on close but
+ only on rmdir and unlink. If the FUSE implementation does not call this
+ handler we will flush node on release. See fuse_exfat_relase() above.
+ */
+ exfat_debug("[%s] %s", __func__, path);
+ return exfat_flush_node(&ef, get_node(fi));
}
static int fuse_exfat_fsync(const char* path, int datasync,
struct fuse_file_info *fi)
{
+ int rc;
+
exfat_debug("[%s] %s", __func__, path);
- exfat_flush_node(&ef, get_node(fi));
- exfat_flush(&ef);
+ rc = exfat_flush_nodes(&ef);
+ if (rc != 0)
+ return rc;
+ rc = exfat_flush(&ef);
+ if (rc != 0)
+ return rc;
return exfat_fsync(ef.dev);
}
static int fuse_exfat_read(const char* path, char* buffer, size_t size,
off_t offset, struct fuse_file_info* fi)
{
- ssize_t ret;
-
exfat_debug("[%s] %s (%zu bytes)", __func__, path, size);
- ret = exfat_generic_pread(&ef, get_node(fi), buffer, size, offset);
- if (ret < 0)
- return -EIO;
- return ret;
+ return exfat_generic_pread(&ef, get_node(fi), buffer, size, offset);
}
static int fuse_exfat_write(const char* path, const char* buffer, size_t size,
off_t offset, struct fuse_file_info* fi)
{
- ssize_t ret;
-
exfat_debug("[%s] %s (%zu bytes)", __func__, path, size);
- ret = exfat_generic_pwrite(&ef, get_node(fi), buffer, size, offset);
- if (ret < 0)
- return -EIO;
- return ret;
+ return exfat_generic_pwrite(&ef, get_node(fi), buffer, size, offset);
}
static int fuse_exfat_unlink(const char* path)
rc = exfat_unlink(&ef, node);
exfat_put_node(&ef, node);
- return rc;
+ if (rc != 0)
+ return rc;
+ return exfat_cleanup_node(&ef, node);
}
static int fuse_exfat_rmdir(const char* path)
rc = exfat_rmdir(&ef, node);
exfat_put_node(&ef, node);
- return rc;
+ if (rc != 0)
+ return rc;
+ return exfat_cleanup_node(&ef, node);
}
static int fuse_exfat_mknod(const char* path, mode_t mode, dev_t dev)
return rc;
exfat_utimes(node, tv);
+ rc = exfat_flush_node(&ef, node);
exfat_put_node(&ef, node);
- return 0;
+ return rc;
}
static int fuse_exfat_chmod(const char* path, mode_t mode)
b) no such thing as inode;
So here we assume that inode = cluster.
*/
- sfs->f_files = (sfs->f_blocks - sfs->f_bfree) >> ef.sb->spc_bits;
+ sfs->f_files = le32_to_cpu(ef.sb->cluster_count);
sfs->f_favail = sfs->f_bfree >> ef.sb->spc_bits;
sfs->f_ffree = sfs->f_bavail;
.truncate = fuse_exfat_truncate,
.readdir = fuse_exfat_readdir,
.open = fuse_exfat_open,
+ .create = fuse_exfat_create,
.release = fuse_exfat_release,
+ .flush = fuse_exfat_flush,
.fsync = fuse_exfat_fsync,
.fsyncdir = fuse_exfat_fsync,
.read = fuse_exfat_read,
static char* add_option(char* options, const char* name, const char* value)
{
size_t size;
+ char* optionsf = options;
if (value)
size = strlen(options) + strlen(name) + strlen(value) + 3;
options = realloc(options, size);
if (options == NULL)
{
+ free(optionsf);
exfat_error("failed to reallocate options string");
return NULL;
}
return options;
}
+static void escape(char* escaped, const char* orig)
+{
+ do
+ {
+ if (*orig == ',' || *orig == '\\')
+ *escaped++ = '\\';
+ }
+ while ((*escaped++ = *orig++));
+}
+
+static char* add_fsname_option(char* options, const char* spec)
+{
+ /* escaped string cannot be more than twice as big as the original one */
+ char* escaped = malloc(strlen(spec) * 2 + 1);
+
+ if (escaped == NULL)
+ {
+ free(options);
+ exfat_error("failed to allocate escaped string for %s", spec);
+ return NULL;
+ }
+
+ /* on some platforms (e.g. Android, Solaris) device names can contain
+ commas */
+ escape(escaped, spec);
+ options = add_option(options, "fsname", escaped);
+ free(escaped);
+ return options;
+}
+
+static char* add_ro_option(char* options, bool ro)
+{
+ return ro ? add_option(options, "ro", NULL) : options;
+}
+
static char* add_user_option(char* options)
{
struct passwd* pw;
return add_option(options, "blksize", blksize);
}
-static char* add_fuse_options(char* options, const char* spec)
+static char* add_fuse_options(char* options, const char* spec, bool ro)
{
- options = add_option(options, "fsname", spec);
+ options = add_fsname_option(options, spec);
+ if (options == NULL)
+ return NULL;
+ options = add_ro_option(options, ro);
if (options == NULL)
return NULL;
options = add_user_option(options);
struct fuse* fh = NULL;
int opt;
- printf("FUSE exfat %u.%u.%u\n",
- EXFAT_VERSION_MAJOR, EXFAT_VERSION_MINOR, EXFAT_VERSION_PATCH);
+ printf("FUSE exfat %s\n", VERSION);
mount_options = strdup(default_options);
if (mount_options == NULL)
break;
case 'V':
free(mount_options);
- puts("Copyright (C) 2010-2013 Andrew Nayenko");
+ puts("Copyright (C) 2010-2018 Andrew Nayenko");
return 0;
case 'v':
break;
return 1;
}
- if (ef.ro == -1) /* read-only fallback was used */
- {
- mount_options = add_option(mount_options, "ro", NULL);
- if (mount_options == NULL)
- {
- exfat_unmount(&ef);
- return 1;
- }
- }
-
- mount_options = add_fuse_options(mount_options, spec);
+ mount_options = add_fuse_options(mount_options, spec, (ef.ro != 0));
if (mount_options == NULL)
{
exfat_unmount(&ef);
OSDN Git Service
