+0.9.6 (2012-01-14)
+
+* Fixed write performance regression introduced in 0.9.4.
+* Mount in read-only mode if the device is write-protected.
+* Set ctime to mtime to ensure we don't break programs that rely on ctime
+(e.g. rsync considered that all files are outdated) [Eldad Zack].
+* Indicate that FS in not clean when it was not cleanly unmounted.
+* Utilities are now compatible with GNU/Hurd.
+* Fixed several memory leaks that could occur on error handling paths.
+* Improved handling of corrupted file systems.
+
0.9.5 (2011-05-15)
* Fixed erasing of the root directory cluster when creating a new FS with
#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";
struct exfat ef;
return 1;
}
+ if (ef.ro_fallback)
+ {
+ 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)
{
static void erase_raw(struct exfat* ef, size_t size, off_t offset)
{
- exfat_write_raw(ef->zero_sector, size, offset, ef->fd);
+ exfat_write_raw(ef->zero_cluster, size, offset, ef->fd);
}
static int erase_range(struct exfat* ef, struct exfat_node* node,
uint64_t begin, uint64_t end)
{
- uint64_t sector_boundary;
+ uint64_t cluster_boundary;
cluster_t cluster;
if (begin >= end)
return 0;
- sector_boundary = (node->size | (SECTOR_SIZE(*ef->sb) - 1)) + 1;
+ cluster_boundary = (begin | (CLUSTER_SIZE(*ef->sb) - 1)) + 1;
cluster = exfat_advance_cluster(ef, node,
- node->size / CLUSTER_SIZE(*ef->sb));
+ begin / CLUSTER_SIZE(*ef->sb));
if (CLUSTER_INVALID(cluster))
{
exfat_error("invalid cluster in file");
return -EIO;
}
- /* erase from the beginning to the closest sector boundary */
- erase_raw(ef, MIN(sector_boundary, end) - node->size,
- exfat_c2o(ef, cluster) + node->size % CLUSTER_SIZE(*ef->sb));
- /* erase whole sectors */
- while (sector_boundary < end)
+ /* erase from the beginning to the closest cluster boundary */
+ erase_raw(ef, MIN(cluster_boundary, end) - begin,
+ exfat_c2o(ef, cluster) + begin % CLUSTER_SIZE(*ef->sb));
+ /* erase whole clusters */
+ while (cluster_boundary < end)
{
- if (sector_boundary % CLUSTER_SIZE(*ef->sb) == 0)
- cluster = exfat_next_cluster(ef, node, cluster);
- erase_raw(ef, SECTOR_SIZE(*ef->sb),
- exfat_c2o(ef, cluster) + sector_boundary % CLUSTER_SIZE(*ef->sb));
- sector_boundary += SECTOR_SIZE(*ef->sb);
+ cluster = exfat_next_cluster(ef, node, cluster);
+ /* the cluster cannot be invalid because we have just allocated it */
+ if (CLUSTER_INVALID(cluster))
+ exfat_bug("invalid cluster in file");
+ erase_raw(ef, CLUSTER_SIZE(*ef->sb), exfat_c2o(ef, cluster));
+ cluster_boundary += CLUSTER_SIZE(*ef->sb);
}
return 0;
}
cmap;
char label[EXFAT_ENAME_MAX * 6 + 1]; /* a character can occupy up to
6 bytes in UTF-8 */
- void* zero_sector;
+ void* zero_cluster;
int dmask, fmask;
uid_t uid;
gid_t gid;
int ro;
+ int ro_fallback;
int noatime;
};
#define EXFAT_CLUSTER_BAD 0xfffffff7 /* cluster contains bad sector */
#define EXFAT_CLUSTER_END 0xffffffff /* final cluster of file or directory */
+#define EXFAT_STATE_MOUNTED 2
+
struct exfat_super_block
{
uint8_t jump[3]; /* 0x00 jmp and nop instructions */
fd = open(spec, ro ? O_RDONLY : O_RDWR);
if (fd < 0)
{
- exfat_error("failed to open `%s'", spec);
+ exfat_error("failed to open `%s' in read-%s mode", spec,
+ ro ? "only" : "write");
return -1;
}
if (fstat(fd, &stbuf) != 0)
return 0;
}
+static int commit_super_block(const struct exfat* ef)
+{
+ exfat_write_raw(ef->sb, sizeof(struct exfat_super_block), 0, ef->fd);
+ if (fsync(ef->fd) < 0)
+ {
+ exfat_error("fsync failed");
+ return 1;
+ }
+ return 0;
+}
+
+static int prepare_super_block(const struct exfat* ef)
+{
+ if (le16_to_cpu(ef->sb->volume_state) & EXFAT_STATE_MOUNTED)
+ exfat_warn("volume was not unmounted cleanly");
+
+ if (ef->ro)
+ return 0;
+
+ ef->sb->volume_state = cpu_to_le16(
+ le16_to_cpu(ef->sb->volume_state) | EXFAT_STATE_MOUNTED);
+ return commit_super_block(ef);
+}
+
int exfat_mount(struct exfat* ef, const char* spec, const char* options)
{
int rc;
tzset();
memset(ef, 0, sizeof(struct exfat));
- ef->sb = malloc(sizeof(struct exfat_super_block));
- if (ef->sb == NULL)
- {
- exfat_error("memory allocation failed");
- return -ENOMEM;
- }
- memset(ef->sb, 0, sizeof(struct exfat_super_block));
-
parse_options(ef, options);
ef->fd = exfat_open(spec, ef->ro);
if (ef->fd < 0)
{
- free(ef->sb);
- return -EIO;
+ if (ef->ro || !match_option(options, "ro_fallback"))
+ return -EIO;
+ ef->fd = exfat_open(spec, 1);
+ if (ef->fd < 0)
+ return -EIO;
+ exfat_warn("device is write-protected, mounting read-only");
+ ef->ro_fallback = ef->ro = 1;
}
+ ef->sb = malloc(sizeof(struct exfat_super_block));
+ if (ef->sb == NULL)
+ {
+ close(ef->fd);
+ exfat_error("failed to allocate memory for the super block");
+ return -ENOMEM;
+ }
+ memset(ef->sb, 0, sizeof(struct exfat_super_block));
+
exfat_read_raw(ef->sb, sizeof(struct exfat_super_block), 0, ef->fd);
if (memcmp(ef->sb->oem_name, "EXFAT ", 8) != 0)
{
return -EIO;
}
- ef->zero_sector = malloc(SECTOR_SIZE(*ef->sb));
- if (ef->zero_sector == NULL)
+ ef->zero_cluster = malloc(CLUSTER_SIZE(*ef->sb));
+ if (ef->zero_cluster == NULL)
{
close(ef->fd);
free(ef->sb);
exfat_error("failed to allocate zero sector");
return -ENOMEM;
}
- /* use zero_sector as a temporary buffer for VBR checksum verification */
- if (verify_vbr_checksum(ef->zero_sector, SECTOR_SIZE(*ef->sb), ef->fd) != 0)
+ /* use zero_cluster as a temporary buffer for VBR checksum verification */
+ if (verify_vbr_checksum(ef->zero_cluster, SECTOR_SIZE(*ef->sb),
+ ef->fd) != 0)
{
- free(ef->zero_sector);
+ free(ef->zero_cluster);
close(ef->fd);
free(ef->sb);
return -EIO;
}
- memset(ef->zero_sector, 0, SECTOR_SIZE(*ef->sb));
+ memset(ef->zero_cluster, 0, CLUSTER_SIZE(*ef->sb));
ef->root = malloc(sizeof(struct exfat_node));
if (ef->root == NULL)
{
- free(ef->zero_sector);
+ free(ef->zero_cluster);
close(ef->fd);
free(ef->sb);
exfat_error("failed to allocate root node");
goto error;
}
+ if (prepare_super_block(ef) != 0)
+ goto error;
+
return 0;
error:
exfat_put_node(ef, ef->root);
exfat_reset_cache(ef);
free(ef->root);
- free(ef->zero_sector);
+ free(ef->zero_cluster);
close(ef->fd);
free(ef->sb);
return -EIO;
}
+static void finalize_super_block(struct exfat* ef)
+{
+ if (ef->ro)
+ return;
+
+ ef->sb->volume_state = cpu_to_le16(
+ le16_to_cpu(ef->sb->volume_state) & ~EXFAT_STATE_MOUNTED);
+
+ /* Some implementations set the percentage of allocated space to 0xff
+ on FS creation and never update it. In this case leave it as is. */
+ if (ef->sb->allocated_percent != 0xff)
+ {
+ uint32_t free, total;
+
+ free = exfat_count_free_clusters(ef);
+ total = le32_to_cpu(ef->sb->cluster_count);
+ ef->sb->allocated_percent = ((total - free) * 100 + total / 2) / total;
+ }
+
+ commit_super_block(ef);
+}
+
void exfat_unmount(struct exfat* ef)
{
exfat_put_node(ef, ef->root);
exfat_reset_cache(ef);
free(ef->root);
ef->root = NULL;
- free(ef->zero_sector);
- ef->zero_sector = NULL;
- free(ef->cmap.chunk);
- ef->cmap.chunk = NULL;
- if (fsync(ef->fd) < 0)
- exfat_error("fsync failed");
- if (close(ef->fd) < 0)
+ finalize_super_block(ef);
+ if (close(ef->fd) < 0) /* close descriptor immediately after fsync */
exfat_error("close failed");
ef->fd = 0;
+ free(ef->zero_cluster);
+ ef->zero_cluster = NULL;
+ free(ef->cmap.chunk);
+ ef->cmap.chunk = NULL;
free(ef->sb);
ef->sb = NULL;
free(ef->upcase);
/* fetch the next cluster if needed */
if ((it->offset & (CLUSTER_SIZE(*ef->sb) - 1)) == 0)
{
+ if (it->offset >= parent->size)
+ {
+ exfat_error("missing EOD entry (0x%"PRIx64", 0x%"PRIx64")",
+ it->offset, parent->size);
+ return 1;
+ }
it->cluster = exfat_next_cluster(ef, parent, it->cluster);
if (CLUSTER_INVALID(it->cluster))
{
static int readdir(struct exfat* ef, const struct exfat_node* parent,
struct exfat_node** node, struct iterator* it)
{
+ int rc = -EIO;
const struct exfat_entry* entry;
const struct exfat_entry_meta1* meta1;
const struct exfat_entry_meta2* meta2;
if (continuations < 2)
{
exfat_error("too few continuations (%hhu)", continuations);
- return -EIO;
+ goto error;
}
reference_checksum = le16_to_cpu(meta1->checksum);
actual_checksum = exfat_start_checksum(meta1);
*node = allocate_node();
if (*node == NULL)
- return -ENOMEM;
+ {
+ rc = -ENOMEM;
+ goto error;
+ }
/* new node has zero reference counter */
(*node)->entry_cluster = it->cluster;
(*node)->entry_offset = it->offset;
{
exfat_error("invalid checksum (0x%hx != 0x%hx)",
actual_checksum, reference_checksum);
- return -EIO;
+ goto error;
}
if (fetch_next_entry(ef, parent, it) != 0)
goto error;
if (CLUSTER_INVALID(le32_to_cpu(upcase->start_cluster)))
{
exfat_error("invalid cluster in upcase table");
- return -EIO;
+ goto error;
}
if (le64_to_cpu(upcase->size) == 0 ||
le64_to_cpu(upcase->size) > 0xffff * sizeof(uint16_t) ||
{
exfat_error("bad upcase table size (%"PRIu64" bytes)",
le64_to_cpu(upcase->size));
- return -EIO;
+ goto error;
}
ef->upcase = malloc(le64_to_cpu(upcase->size));
if (ef->upcase == NULL)
{
exfat_error("failed to allocate upcase table (%"PRIu64" bytes)",
le64_to_cpu(upcase->size));
- return -ENOMEM;
+ rc = -ENOMEM;
+ goto error;
}
ef->upcase_chars = le64_to_cpu(upcase->size) / sizeof(le16_t);
if (CLUSTER_INVALID(le32_to_cpu(bitmap->start_cluster)))
{
exfat_error("invalid cluster in clusters bitmap");
- return -EIO;
+ goto error;
}
ef->cmap.size = le32_to_cpu(ef->sb->cluster_count) -
EXFAT_FIRST_DATA_CLUSTER;
exfat_error("invalid clusters bitmap size: %"PRIu64
" (expected at least %u)",
le64_to_cpu(bitmap->size), (ef->cmap.size + 7) / 8);
- return -EIO;
+ goto error;
}
ef->cmap.start_cluster = le32_to_cpu(bitmap->start_cluster);
/* FIXME bitmap can be rather big, up to 512 MB */
{
exfat_error("failed to allocate clusters bitmap chunk "
"(%"PRIu64" bytes)", le64_to_cpu(bitmap->size));
- return -ENOMEM;
+ rc = -ENOMEM;
+ goto error;
}
exfat_read_raw(ef->cmap.chunk, le64_to_cpu(bitmap->size),
if (label->length > EXFAT_ENAME_MAX)
{
exfat_error("too long label (%hhu chars)", label->length);
- return -EIO;
+ goto error;
}
if (utf16_to_utf8(ef->label, label->name,
sizeof(ef->label), EXFAT_ENAME_MAX) != 0)
- return -EIO;
+ goto error;
break;
default:
error:
free(*node);
*node = NULL;
- return -EIO;
+ return rc;
}
int exfat_cache_directory(struct exfat* ef, struct exfat_node* dir)
CLUSTER_SIZE(*ef->sb) / 512;
stbuf->st_mtime = node->mtime;
stbuf->st_atime = node->atime;
- stbuf->st_ctime = 0; /* unapplicable */
+ /* set ctime to mtime to ensure we don't break programs that rely on ctime
+ (e.g. rsync) */
+ stbuf->st_ctime = node->mtime;
}
#define SEC_IN_MIN 60ll
size_t i;
const char* units[] = {"bytes", "KB", "MB", "GB", "TB", "PB"};
uint64_t divisor = 1;
+ uint64_t temp = 0;
- for (i = 0; i < sizeof(units) / sizeof(units[0]) - 1; i++)
+ for (i = 0; i < sizeof(units) / sizeof(units[0]) - 1; i++, divisor *= 1024)
{
- if ((value + divisor / 2) / divisor < 1024)
+ temp = (value + divisor / 2) / divisor;
+
+ if (temp == 0)
+ break;
+ if (temp / 1024 * 1024 == temp)
+ continue;
+ if (temp < 10240)
break;
- divisor *= 1024;
}
- hb->value = (value + divisor / 2) / divisor;
+ hb->value = temp;
hb->unit = units[i];
}
#define EXFAT_VERSION_MAJOR 0
#define EXFAT_VERSION_MINOR 9
-#define EXFAT_VERSION_PATCH 5
+#define EXFAT_VERSION_PATCH 6
#endif /* ifndef VERSION_H_INCLUDED */
projects / sven / fuse-exfat.git / commitdiff