X-Git-Url: https://git.sven.stormbind.net/?a=blobdiff_plain;f=fuse%2Fmain.c;h=e5e25d9499f2c253b28fba9d4ce52d607808ae79;hb=cf3a99e1e63d87069d44c05821a83da3b80cdbc4;hp=fe5666beabab1fe0657ef670aa7ed357a8829fc3;hpb=65e85a0acdb22bd25386f4fe9cde50c66339a496;p=sven%2Ffuse-exfat.git
diff --git a/fuse/main.c b/fuse/main.c
index fe5666b..e5e25d9 100644
--- a/fuse/main.c
+++ b/fuse/main.c
@@ -2,11 +2,12 @@
main.c (01.09.09)
FUSE-based exFAT implementation. Requires FUSE 2.6 or later.
- Copyright (C) 2009, 2010 Andrew Nayenko
+ Free exFAT implementation.
+ Copyright (C) 2010-2018 Andrew Nayenko
- This program is free software: you can redistribute it and/or modify
+ 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
- the Free Software Foundation, either version 3 of the License, or
+ the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
@@ -14,30 +15,35 @@
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see .
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
+#include
+#define FUSE_USE_VERSION 26
#include
#include
#include
#include
#include
#include
-#include
#include
#include
#include
#include
#include
-#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 = "allow_other,blkdev";
+const char* default_options = "ro_fallback,allow_other,blkdev,big_writes,"
+ "default_permissions";
struct exfat ef;
@@ -49,6 +55,7 @@ static struct exfat_node* get_node(const struct fuse_file_info* fi)
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)
@@ -56,7 +63,7 @@ static int fuse_exfat_getattr(const char* path, struct stat* stbuf)
struct exfat_node* node;
int rc;
- exfat_debug("[fuse_exfat_getattr] %s", path);
+ exfat_debug("[%s] %s", __func__, path);
rc = exfat_lookup(&ef, &node, path);
if (rc != 0)
@@ -72,13 +79,20 @@ static int fuse_exfat_truncate(const char* path, off_t size)
struct exfat_node* node;
int rc;
- exfat_debug("[fuse_exfat_truncate] %s, %"PRIu64, path, (uint64_t) size);
+ exfat_debug("[%s] %s, %"PRId64, __func__, path, size);
rc = exfat_lookup(&ef, &node, path);
if (rc != 0)
return rc;
- rc = exfat_truncate(&ef, node, size);
+ 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;
}
@@ -90,17 +104,17 @@ static int fuse_exfat_readdir(const char* path, void* buffer,
struct exfat_node* node;
struct exfat_iterator it;
int rc;
- char name[EXFAT_NAME_MAX + 1];
+ char name[EXFAT_UTF8_NAME_BUFFER_MAX];
- exfat_debug("[fuse_exfat_readdir] %s", path);
+ 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;
}
@@ -111,15 +125,15 @@ static int fuse_exfat_readdir(const char* path, void* buffer,
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, EXFAT_NAME_MAX);
- exfat_debug("[fuse_exfat_readdir] %s: %s, %"PRIu64" bytes, cluster %u",
- name, IS_CONTIGUOUS(*node) ? "contiguous" : "fragmented",
- (uint64_t) node->size, node->start_cluster);
+ exfat_get_name(node, name);
+ exfat_debug("[%s] %s: %s, %"PRId64" bytes, cluster 0x%x", __func__,
+ name, node->is_contiguous ? "contiguous" : "fragmented",
+ node->size, node->start_cluster);
filler(buffer, name, NULL, 0);
exfat_put_node(&ef, node);
}
@@ -133,34 +147,86 @@ static int fuse_exfat_open(const char* path, struct fuse_file_info* fi)
struct exfat_node* node;
int rc;
- exfat_debug("[fuse_exfat_open] %s", path);
+ exfat_debug("[%s] %s", __func__, path);
rc = exfat_lookup(&ef, &node, path);
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);
+ 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)
{
- exfat_debug("[fuse_exfat_read] %s (%zu bytes)", path, size);
- return exfat_read(&ef, get_node(fi), buffer, size, offset);
+ exfat_debug("[%s] %s (%zu bytes)", __func__, path, size);
+ 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)
{
- exfat_debug("[fuse_exfat_write] %s (%zu bytes)", path, size);
- return exfat_write(&ef, get_node(fi), buffer, size, offset);
+ exfat_debug("[%s] %s (%zu bytes)", __func__, path, size);
+ return exfat_generic_pwrite(&ef, get_node(fi), buffer, size, offset);
}
static int fuse_exfat_unlink(const char* path)
@@ -168,7 +234,7 @@ static int fuse_exfat_unlink(const char* path)
struct exfat_node* node;
int rc;
- exfat_debug("[fuse_exfat_unlink] %s", path);
+ exfat_debug("[%s] %s", __func__, path);
rc = exfat_lookup(&ef, &node, path);
if (rc != 0)
@@ -176,7 +242,9 @@ 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)
@@ -184,7 +252,7 @@ static int fuse_exfat_rmdir(const char* path)
struct exfat_node* node;
int rc;
- exfat_debug("[fuse_exfat_rmdir] %s", path);
+ exfat_debug("[%s] %s", __func__, path);
rc = exfat_lookup(&ef, &node, path);
if (rc != 0)
@@ -192,24 +260,26 @@ 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)
{
- exfat_debug("[fuse_exfat_mknod] %s", path);
+ exfat_debug("[%s] %s 0%ho", __func__, path, mode);
return exfat_mknod(&ef, path);
}
static int fuse_exfat_mkdir(const char* path, mode_t mode)
{
- exfat_debug("[fuse_exfat_mkdir] %s", path);
+ exfat_debug("[%s] %s 0%ho", __func__, path, mode);
return exfat_mkdir(&ef, path);
}
static int fuse_exfat_rename(const char* old_path, const char* new_path)
{
- exfat_debug("[fuse_exfat_rename] %s => %s", old_path, new_path);
+ exfat_debug("[%s] %s => %s", __func__, old_path, new_path);
return exfat_rename(&ef, old_path, new_path);
}
@@ -218,19 +288,41 @@ static int fuse_exfat_utimens(const char* path, const struct timespec tv[2])
struct exfat_node* node;
int rc;
- exfat_debug("[fuse_exfat_utimens] %s", path);
+ exfat_debug("[%s] %s", __func__, path);
rc = exfat_lookup(&ef, &node, path);
if (rc != 0)
return rc;
exfat_utimes(node, tv);
+ rc = exfat_flush_node(&ef, node);
exfat_put_node(&ef, node);
+ return rc;
+}
+
+static int fuse_exfat_chmod(const char* path, mode_t mode)
+{
+ const mode_t VALID_MODE_MASK = S_IFREG | S_IFDIR |
+ S_IRWXU | S_IRWXG | S_IRWXO;
+
+ exfat_debug("[%s] %s 0%ho", __func__, path, mode);
+ if (mode & ~VALID_MODE_MASK)
+ return -EPERM;
+ return 0;
+}
+
+static int fuse_exfat_chown(const char* path, uid_t uid, gid_t gid)
+{
+ exfat_debug("[%s] %s %u:%u", __func__, path, uid, gid);
+ if (uid != ef.uid || gid != ef.gid)
+ return -EPERM;
return 0;
}
static int fuse_exfat_statfs(const char* path, struct statvfs* sfs)
{
+ exfat_debug("[%s]", __func__);
+
sfs->f_bsize = CLUSTER_SIZE(*ef.sb);
sfs->f_frsize = CLUSTER_SIZE(*ef.sb);
sfs->f_blocks = le64_to_cpu(ef.sb->sector_count) >> ef.sb->spc_bits;
@@ -244,21 +336,31 @@ static int fuse_exfat_statfs(const char* path, struct statvfs* sfs)
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;
return 0;
}
+static void* fuse_exfat_init(struct fuse_conn_info* fci)
+{
+ exfat_debug("[%s]", __func__);
+#ifdef FUSE_CAP_BIG_WRITES
+ fci->want |= FUSE_CAP_BIG_WRITES;
+#endif
+ return NULL;
+}
+
static void fuse_exfat_destroy(void* unused)
{
+ exfat_debug("[%s]", __func__);
exfat_unmount(&ef);
}
static void usage(const char* prog)
{
- fprintf(stderr, "Usage: %s [-d] [-o options] [-v] \n", prog);
+ fprintf(stderr, "Usage: %s [-d] [-o options] [-V] \n", prog);
exit(1);
}
@@ -268,7 +370,11 @@ static struct fuse_operations fuse_exfat_ops =
.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,
.write = fuse_exfat_write,
.unlink = fuse_exfat_unlink,
@@ -277,13 +383,17 @@ static struct fuse_operations fuse_exfat_ops =
.mkdir = fuse_exfat_mkdir,
.rename = fuse_exfat_rename,
.utimens = fuse_exfat_utimens,
+ .chmod = fuse_exfat_chmod,
+ .chown = fuse_exfat_chown,
.statfs = fuse_exfat_statfs,
+ .init = fuse_exfat_init,
.destroy = fuse_exfat_destroy,
};
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;
@@ -293,6 +403,7 @@ static char* add_option(char* options, const char* name, const char* value)
options = realloc(options, size);
if (options == NULL)
{
+ free(optionsf);
exfat_error("failed to reallocate options string");
return NULL;
}
@@ -306,17 +417,34 @@ static char* add_option(char* options, const char* name, const char* value)
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)
{
- char spec_abs[PATH_MAX];
+ /* escaped string cannot be more than twice as big as the original one */
+ char* escaped = malloc(strlen(spec) * 2 + 1);
- if (realpath(spec, spec_abs) == NULL)
+ if (escaped == NULL)
{
free(options);
- exfat_error("failed to get absolute path for `%s'", spec);
+ exfat_error("failed to allocate escaped string for %s", spec);
return NULL;
}
- return add_option(options, "fsname", spec_abs);
+
+ /* 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_user_option(char* options)
@@ -373,10 +501,9 @@ int main(int argc, char* argv[])
int debug = 0;
struct fuse_chan* fc = NULL;
struct fuse* fh = NULL;
- char** pp;
+ 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)
@@ -385,40 +512,39 @@ int main(int argc, char* argv[])
return 1;
}
- for (pp = argv + 1; *pp; pp++)
+ while ((opt = getopt(argc, argv, "dno:Vv")) != -1)
{
- if (strcmp(*pp, "-o") == 0)
+ switch (opt)
{
- pp++;
- if (*pp == NULL)
- usage(argv[0]);
- mount_options = add_option(mount_options, *pp, NULL);
+ case 'd':
+ debug = 1;
+ break;
+ case 'n':
+ break;
+ case 'o':
+ mount_options = add_option(mount_options, optarg, NULL);
if (mount_options == NULL)
return 1;
- }
- else if (strcmp(*pp, "-d") == 0)
- debug = 1;
- else if (strcmp(*pp, "-v") == 0)
- {
+ break;
+ case 'V':
free(mount_options);
- puts("Copyright (C) 2009 Andrew Nayenko");
+ puts("Copyright (C) 2010-2018 Andrew Nayenko");
return 0;
- }
- else if (spec == NULL)
- spec = *pp;
- else if (mount_point == NULL)
- mount_point = *pp;
- else
- {
+ case 'v':
+ break;
+ default:
free(mount_options);
usage(argv[0]);
+ break;
}
}
- if (spec == NULL || mount_point == NULL)
+ if (argc - optind != 2)
{
free(mount_options);
usage(argv[0]);
}
+ spec = argv[optind];
+ mount_point = argv[optind + 1];
if (exfat_mount(&ef, spec, mount_options) != 0)
{
@@ -426,6 +552,16 @@ int main(int argc, char* argv[])
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);
if (mount_options == NULL)
{
@@ -475,22 +611,27 @@ int main(int argc, char* argv[])
}
/* exit session on HUP, TERM and INT signals and ignore PIPE signal */
- if (fuse_set_signal_handlers(fuse_get_session(fh)))
+ if (fuse_set_signal_handlers(fuse_get_session(fh)) != 0)
{
fuse_unmount(mount_point, fc);
fuse_destroy(fh);
exfat_unmount(&ef);
+ exfat_error("failed to set signal handlers");
return 1;
}
- /* go to background unless "-d" option is passed */
- fuse_daemonize(debug);
-
- /* FUSE main loop */
- fuse_loop(fh);
+ /* go to background (unless "-d" option is passed) and run FUSE
+ main loop */
+ if (fuse_daemonize(debug) == 0)
+ {
+ if (fuse_loop(fh) != 0)
+ exfat_error("FUSE loop failure");
+ }
+ else
+ exfat_error("failed to daemonize");
- /* it's quite illogical but fuse_unmount() must be called BEFORE
- fuse_destroy() */
+ fuse_remove_signal_handlers(fuse_get_session(fh));
+ /* note that fuse_unmount() must be called BEFORE fuse_destroy() */
fuse_unmount(mount_point, fc);
fuse_destroy(fh);
return 0;