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authorbigbiff bigbiff <bigbiff@teamw.in>2013-01-19 16:23:42 +0100
committerbigbiff bigbiff <bigbiff@teamw.in>2013-01-19 16:23:42 +0100
commit31f0e5fa22a878fc871c245782f388a7b9336436 (patch)
tree48dbf415a7c6724877a9302629e0f47d9ca68836
parentFix handling of blkid output (diff)
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-rw-r--r--Android.mk4
-rw-r--r--exfat/cluster.c428
-rw-r--r--exfat/node.c1038
-rw-r--r--fuse/fuse.c5
-rw-r--r--fuse/fuse_lowlevel.c127
-rw-r--r--prebuilt/Android.mk4
6 files changed, 1571 insertions, 35 deletions
diff --git a/Android.mk b/Android.mk
index 09e869e41..8921f85d3 100644
--- a/Android.mk
+++ b/Android.mk
@@ -283,6 +283,7 @@ include $(commands_recovery_local_path)/libjpegtwrp/Android.mk \
$(commands_recovery_local_path)/crypto/cryptfs/Android.mk \
$(commands_recovery_local_path)/libcrecovery/Android.mk \
$(commands_recovery_local_path)/twmincrypt/Android.mk \
+ $(commands_recovery_local_path)/exfat/mkfs/Android.mk
ifeq ($(TW_INCLUDE_CRYPTO_SAMSUNG), true)
include $(commands_recovery_local_path)/crypto/libcrypt_samsung/Android.mk
@@ -292,11 +293,10 @@ ifeq ($(TW_INCLUDE_JB_CRYPTO), true)
include $(commands_recovery_local_path)/crypto/fs_mgr/Android.mk
endif
-ifeq ($(TW_INCLUDE_EXFAT), true)
+ifeq ($(TW_INCLUDE_FUSE_EXFAT), true)
include $(commands_recovery_local_path)/fuse/Android.mk
include $(commands_recovery_local_path)/exfat/libexfat/Android.mk
include $(commands_recovery_local_path)/exfat/exfat-fuse/Android.mk
- include $(commands_recovery_local_path)/exfat/mkfs/Android.mk
endif
commands_recovery_local_path :=
diff --git a/exfat/cluster.c b/exfat/cluster.c
new file mode 100644
index 000000000..6b0303df8
--- /dev/null
+++ b/exfat/cluster.c
@@ -0,0 +1,428 @@
+/*
+ cluster.c (03.09.09)
+ exFAT file system implementation library.
+
+ Copyright (C) 2010-2012 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
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ 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 <http://www.gnu.org/licenses/>.
+*/
+
+#include "exfat.h"
+#include <errno.h>
+#include <string.h>
+
+/*
+ * Sector to absolute offset.
+ */
+static off64_t s2o(const struct exfat* ef, off64_t sector)
+{
+ return sector << ef->sb->sector_bits;
+}
+
+/*
+ * Cluster to sector.
+ */
+static off64_t c2s(const struct exfat* ef, cluster_t cluster)
+{
+ if (cluster < EXFAT_FIRST_DATA_CLUSTER)
+ exfat_bug("invalid cluster number %u", cluster);
+ return le32_to_cpu(ef->sb->cluster_sector_start) +
+ ((off64_t) (cluster - EXFAT_FIRST_DATA_CLUSTER) << ef->sb->spc_bits);
+}
+
+/*
+ * Cluster to absolute offset.
+ */
+off64_t exfat_c2o(const struct exfat* ef, cluster_t cluster)
+{
+ return s2o(ef, c2s(ef, cluster));
+}
+
+/*
+ * Sector to cluster.
+ */
+static cluster_t s2c(const struct exfat* ef, off64_t sector)
+{
+ return ((sector - le32_to_cpu(ef->sb->cluster_sector_start)) >>
+ ef->sb->spc_bits) + EXFAT_FIRST_DATA_CLUSTER;
+}
+
+/*
+ * Size in bytes to size in clusters (rounded upwards).
+ */
+static uint32_t bytes2clusters(const struct exfat* ef, uint64_t bytes)
+{
+ uint64_t cluster_size = CLUSTER_SIZE(*ef->sb);
+ return (bytes + cluster_size - 1) / cluster_size;
+}
+
+cluster_t exfat_next_cluster(const struct exfat* ef,
+ const struct exfat_node* node, cluster_t cluster)
+{
+ le32_t next;
+ off64_t fat_offset;
+
+ if (cluster < EXFAT_FIRST_DATA_CLUSTER)
+ exfat_bug("bad cluster 0x%x", cluster);
+
+ if (IS_CONTIGUOUS(*node))
+ return cluster + 1;
+ fat_offset = s2o(ef, le32_to_cpu(ef->sb->fat_sector_start))
+ + cluster * sizeof(cluster_t);
+ exfat_pread(ef->dev, &next, sizeof(next), fat_offset);
+ return le32_to_cpu(next);
+}
+
+cluster_t exfat_advance_cluster(const struct exfat* ef,
+ struct exfat_node* node, uint32_t count)
+{
+ uint32_t i;
+
+ if (node->fptr_index > count)
+ {
+ node->fptr_index = 0;
+ node->fptr_cluster = node->start_cluster;
+ }
+
+ for (i = node->fptr_index; i < count; i++)
+ {
+ node->fptr_cluster = exfat_next_cluster(ef, node, node->fptr_cluster);
+ if (CLUSTER_INVALID(node->fptr_cluster))
+ break; /* the caller should handle this and print appropriate
+ error message */
+ }
+ node->fptr_index = count;
+ return node->fptr_cluster;
+}
+
+static cluster_t find_bit_and_set(uint8_t* bitmap, size_t start, size_t end)
+{
+ const size_t start_index = start / 8;
+ const size_t end_index = DIV_ROUND_UP(end, 8);
+ size_t i;
+ size_t c;
+
+ for (i = start_index; i < end_index; i++)
+ {
+ if (bitmap[i] == 0xff)
+ continue;
+ for (c = MAX(i * 8, start); c < MIN((i + 1) * 8, end); c++)
+ if (BMAP_GET(bitmap, c) == 0)
+ {
+ BMAP_SET(bitmap, c);
+ return c + EXFAT_FIRST_DATA_CLUSTER;
+ }
+ }
+ return EXFAT_CLUSTER_END;
+}
+
+void exfat_flush_cmap(struct exfat* ef)
+{
+ exfat_pwrite(ef->dev, ef->cmap.chunk, (ef->cmap.chunk_size + 7) / 8,
+ exfat_c2o(ef, ef->cmap.start_cluster));
+ ef->cmap.dirty = false;
+}
+
+static void set_next_cluster(const struct exfat* ef, int contiguous,
+ cluster_t current, cluster_t next)
+{
+ off64_t fat_offset;
+ le32_t next_le32;
+
+ if (contiguous)
+ return;
+ fat_offset = s2o(ef, le32_to_cpu(ef->sb->fat_sector_start))
+ + current * sizeof(cluster_t);
+ next_le32 = cpu_to_le32(next);
+ exfat_pwrite(ef->dev, &next_le32, sizeof(next_le32), fat_offset);
+}
+
+static cluster_t allocate_cluster(struct exfat* ef, cluster_t hint)
+{
+ cluster_t cluster;
+
+ hint -= EXFAT_FIRST_DATA_CLUSTER;
+ if (hint >= ef->cmap.chunk_size)
+ hint = 0;
+
+ cluster = find_bit_and_set(ef->cmap.chunk, hint, ef->cmap.chunk_size);
+ if (cluster == EXFAT_CLUSTER_END)
+ cluster = find_bit_and_set(ef->cmap.chunk, 0, hint);
+ if (cluster == EXFAT_CLUSTER_END)
+ {
+ exfat_error("no free space left");
+ return EXFAT_CLUSTER_END;
+ }
+
+ ef->cmap.dirty = true;
+ return cluster;
+}
+
+static void free_cluster(struct exfat* ef, cluster_t cluster)
+{
+ if (CLUSTER_INVALID(cluster))
+ exfat_bug("freeing invalid cluster 0x%x", cluster);
+ if (cluster - EXFAT_FIRST_DATA_CLUSTER >= ef->cmap.size)
+ exfat_bug("freeing non-existing cluster 0x%x (0x%x)", cluster,
+ ef->cmap.size);
+
+ BMAP_CLR(ef->cmap.chunk, cluster - EXFAT_FIRST_DATA_CLUSTER);
+ ef->cmap.dirty = true;
+}
+
+static void make_noncontiguous(const struct exfat* ef, cluster_t first,
+ cluster_t last)
+{
+ cluster_t c;
+
+ for (c = first; c < last; c++)
+ set_next_cluster(ef, 0, c, c + 1);
+}
+
+static int shrink_file(struct exfat* ef, struct exfat_node* node,
+ uint32_t current, uint32_t difference);
+
+static int grow_file(struct exfat* ef, struct exfat_node* node,
+ uint32_t current, uint32_t difference)
+{
+ cluster_t previous;
+ cluster_t next;
+ uint32_t allocated = 0;
+
+ if (difference == 0)
+ exfat_bug("zero clusters count passed");
+
+ if (node->start_cluster != EXFAT_CLUSTER_FREE)
+ {
+ /* get the last cluster of the file */
+ previous = exfat_advance_cluster(ef, node, current - 1);
+ if (CLUSTER_INVALID(previous))
+ {
+ exfat_error("invalid cluster 0x%x while growing", previous);
+ return -EIO;
+ }
+ }
+ else
+ {
+ if (node->fptr_index != 0)
+ exfat_bug("non-zero pointer index (%u)", node->fptr_index);
+ /* file does not have clusters (i.e. is empty), allocate
+ the first one for it */
+ previous = allocate_cluster(ef, 0);
+ if (CLUSTER_INVALID(previous))
+ return -ENOSPC;
+ node->fptr_cluster = node->start_cluster = previous;
+ allocated = 1;
+ /* file consists of only one cluster, so it's contiguous */
+ node->flags |= EXFAT_ATTRIB_CONTIGUOUS;
+ }
+
+ while (allocated < difference)
+ {
+ next = allocate_cluster(ef, previous + 1);
+ if (CLUSTER_INVALID(next))
+ {
+ if (allocated != 0)
+ shrink_file(ef, node, current + allocated, allocated);
+ return -ENOSPC;
+ }
+ if (next != previous - 1 && IS_CONTIGUOUS(*node))
+ {
+ /* it's a pity, but we are not able to keep the file contiguous
+ anymore */
+ make_noncontiguous(ef, node->start_cluster, previous);
+ node->flags &= ~EXFAT_ATTRIB_CONTIGUOUS;
+ node->flags |= EXFAT_ATTRIB_DIRTY;
+ }
+ set_next_cluster(ef, IS_CONTIGUOUS(*node), previous, next);
+ previous = next;
+ allocated++;
+ }
+
+ set_next_cluster(ef, IS_CONTIGUOUS(*node), previous, EXFAT_CLUSTER_END);
+ return 0;
+}
+
+static int shrink_file(struct exfat* ef, struct exfat_node* node,
+ uint32_t current, uint32_t difference)
+{
+ cluster_t previous;
+ cluster_t next;
+
+ if (difference == 0)
+ exfat_bug("zero difference passed");
+ if (node->start_cluster == EXFAT_CLUSTER_FREE)
+ exfat_bug("unable to shrink empty file (%u clusters)", current);
+ if (current < difference)
+ exfat_bug("file underflow (%u < %u)", current, difference);
+
+ /* crop the file */
+ if (current > difference)
+ {
+ cluster_t last = exfat_advance_cluster(ef, node,
+ current - difference - 1);
+ if (CLUSTER_INVALID(last))
+ {
+ exfat_error("invalid cluster 0x%x while shrinking", last);
+ return -EIO;
+ }
+ previous = exfat_next_cluster(ef, node, last);
+ set_next_cluster(ef, IS_CONTIGUOUS(*node), last, EXFAT_CLUSTER_END);
+ }
+ else
+ {
+ previous = node->start_cluster;
+ node->start_cluster = EXFAT_CLUSTER_FREE;
+ }
+ node->fptr_index = 0;
+ node->fptr_cluster = node->start_cluster;
+
+ /* free remaining clusters */
+ while (difference--)
+ {
+ if (CLUSTER_INVALID(previous))
+ {
+ exfat_error("invalid cluster 0x%x while freeing after shrink",
+ previous);
+ return -EIO;
+ }
+ next = exfat_next_cluster(ef, node, previous);
+ set_next_cluster(ef, IS_CONTIGUOUS(*node), previous,
+ EXFAT_CLUSTER_FREE);
+ free_cluster(ef, previous);
+ previous = next;
+ }
+ return 0;
+}
+
+static void erase_raw(struct exfat* ef, size_t size, off64_t offset)
+{
+ exfat_pwrite(ef->dev, ef->zero_cluster, size, offset);
+}
+
+static int erase_range(struct exfat* ef, struct exfat_node* node,
+ uint64_t begin, uint64_t end)
+{
+ uint64_t cluster_boundary;
+ cluster_t cluster;
+
+ if (begin >= end)
+ return 0;
+
+ cluster_boundary = (begin | (CLUSTER_SIZE(*ef->sb) - 1)) + 1;
+ cluster = exfat_advance_cluster(ef, node,
+ begin / CLUSTER_SIZE(*ef->sb));
+ if (CLUSTER_INVALID(cluster))
+ {
+ exfat_error("invalid cluster 0x%x while erasing", cluster);
+ return -EIO;
+ }
+ /* 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)
+ {
+ 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 0x%x after allocation", cluster);
+ erase_raw(ef, CLUSTER_SIZE(*ef->sb), exfat_c2o(ef, cluster));
+ cluster_boundary += CLUSTER_SIZE(*ef->sb);
+ }
+ return 0;
+}
+
+int exfat_truncate(struct exfat* ef, struct exfat_node* node, uint64_t size)
+{
+ uint32_t c1 = bytes2clusters(ef, node->size);
+ uint32_t c2 = bytes2clusters(ef, size);
+ int rc = 0;
+
+ if (node->references == 0 && node->parent)
+ exfat_bug("no references, node changes can be lost");
+
+ if (node->size == size)
+ return 0;
+
+ if (c1 < c2)
+ rc = grow_file(ef, node, c1, c2 - c1);
+ else if (c1 > c2)
+ rc = shrink_file(ef, node, c1, c1 - c2);
+
+ if (rc != 0)
+ return rc;
+
+ rc = erase_range(ef, node, node->size, size);
+ if (rc != 0)
+ return rc;
+
+ exfat_update_mtime(node);
+ node->size = size;
+ node->flags |= EXFAT_ATTRIB_DIRTY;
+ return 0;
+}
+
+uint32_t exfat_count_free_clusters(const struct exfat* ef)
+{
+ uint32_t free_clusters = 0;
+ uint32_t i;
+
+ for (i = 0; i < ef->cmap.size; i++)
+ if (BMAP_GET(ef->cmap.chunk, i) == 0)
+ free_clusters++;
+ return free_clusters;
+}
+
+static int find_used_clusters(const struct exfat* ef,
+ cluster_t* a, cluster_t* b)
+{
+ const cluster_t end = le32_to_cpu(ef->sb->cluster_count);
+
+ /* find first used cluster */
+ for (*a = *b + 1; *a < end; (*a)++)
+ if (BMAP_GET(ef->cmap.chunk, *a - EXFAT_FIRST_DATA_CLUSTER))
+ break;
+ if (*a >= end)
+ return 1;
+
+ /* find last contiguous used cluster */
+ for (*b = *a; *b < end; (*b)++)
+ if (BMAP_GET(ef->cmap.chunk, *b - EXFAT_FIRST_DATA_CLUSTER) == 0)
+ {
+ (*b)--;
+ break;
+ }
+
+ return 0;
+}
+
+int exfat_find_used_sectors(const struct exfat* ef, off64_t* a, off64_t* b)
+{
+ cluster_t ca, cb;
+
+ if (*a == 0 && *b == 0)
+ ca = cb = EXFAT_FIRST_DATA_CLUSTER - 1;
+ else
+ {
+ ca = s2c(ef, *a);
+ cb = s2c(ef, *b);
+ }
+ if (find_used_clusters(ef, &ca, &cb) != 0)
+ return 1;
+ if (*a != 0 || *b != 0)
+ *a = c2s(ef, ca);
+ *b = c2s(ef, cb) + (CLUSTER_SIZE(*ef->sb) - 1) / SECTOR_SIZE(*ef->sb);
+ return 0;
+}
diff --git a/exfat/node.c b/exfat/node.c
new file mode 100644
index 000000000..d5104038e
--- /dev/null
+++ b/exfat/node.c
@@ -0,0 +1,1038 @@
+/*
+ node.c (09.10.09)
+ exFAT file system implementation library.
+
+ Copyright (C) 2010-2012 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
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ 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 <http://www.gnu.org/licenses/>.
+*/
+
+#include "exfat.h"
+#include <errno.h>
+#include <string.h>
+#include <inttypes.h>
+
+/* on-disk nodes iterator */
+struct iterator
+{
+ cluster_t cluster;
+ off64_t offset;
+ int contiguous;
+ char* chunk;
+};
+
+struct exfat_node* exfat_get_node(struct exfat_node* node)
+{
+ /* if we switch to multi-threaded mode we will need atomic
+ increment here and atomic decrement in exfat_put_node() */
+ node->references++;
+ return node;
+}
+
+void exfat_put_node(struct exfat* ef, struct exfat_node* node)
+{
+ if (--node->references < 0)
+ {
+ char buffer[EXFAT_NAME_MAX + 1];
+ exfat_get_name(node, buffer, EXFAT_NAME_MAX);
+ exfat_bug("reference counter of `%s' is below zero", buffer);
+ }
+
+ if (node->references == 0)
+ {
+ if (node->flags & EXFAT_ATTRIB_DIRTY)
+ exfat_flush_node(ef, node);
+ if (node->flags & EXFAT_ATTRIB_UNLINKED)
+ {
+ /* free all clusters and node structure itself */
+ exfat_truncate(ef, node, 0);
+ free(node);
+ }
+ if (ef->cmap.dirty)
+ exfat_flush_cmap(ef);
+ }
+}
+
+/**
+ * Cluster + offset from the beginning of the directory to absolute offset.
+ */
+static off64_t co2o(struct exfat* ef, cluster_t cluster, off64_t offset)
+{
+ return exfat_c2o(ef, cluster) + offset % CLUSTER_SIZE(*ef->sb);
+}
+
+static int opendir(struct exfat* ef, const struct exfat_node* dir,
+ struct iterator* it)
+{
+ if (!(dir->flags & EXFAT_ATTRIB_DIR))
+ exfat_bug("not a directory");
+ it->cluster = dir->start_cluster;
+ it->offset = 0;
+ it->contiguous = IS_CONTIGUOUS(*dir);
+ it->chunk = malloc(CLUSTER_SIZE(*ef->sb));
+ if (it->chunk == NULL)
+ {
+ exfat_error("out of memory");
+ return -ENOMEM;
+ }
+ exfat_pread(ef->dev, it->chunk, CLUSTER_SIZE(*ef->sb),
+ exfat_c2o(ef, it->cluster));
+ return 0;
+}
+
+static void closedir(struct iterator* it)
+{
+ it->cluster = 0;
+ it->offset = 0;
+ it->contiguous = 0;
+ free(it->chunk);
+ it->chunk = NULL;
+}
+
+static int fetch_next_entry(struct exfat* ef, const struct exfat_node* parent,
+ struct iterator* it)
+{
+ /* move iterator to the next entry in the directory */
+ it->offset += sizeof(struct exfat_entry);
+ /* fetch the next cluster if needed */
+ if ((it->offset & (CLUSTER_SIZE(*ef->sb) - 1)) == 0)
+ {
+ /* reached the end of directory; the caller should check this
+ condition too */
+ if (it->offset >= parent->size)
+ return 0;
+ it->cluster = exfat_next_cluster(ef, parent, it->cluster);
+ if (CLUSTER_INVALID(it->cluster))
+ {
+ exfat_error("invalid cluster 0x%x while reading directory",
+ it->cluster);
+ return 1;
+ }
+ exfat_pread(ef->dev, it->chunk, CLUSTER_SIZE(*ef->sb),
+ exfat_c2o(ef, it->cluster));
+ }
+ return 0;
+}
+
+static struct exfat_node* allocate_node(void)
+{
+ struct exfat_node* node = malloc(sizeof(struct exfat_node));
+ if (node == NULL)
+ {
+ exfat_error("failed to allocate node");
+ return NULL;
+ }
+ memset(node, 0, sizeof(struct exfat_node));
+ return node;
+}
+
+static void init_node_meta1(struct exfat_node* node,
+ const struct exfat_entry_meta1* meta1)
+{
+ node->flags = le16_to_cpu(meta1->attrib);
+ node->mtime = exfat_exfat2unix(meta1->mdate, meta1->mtime,
+ meta1->mtime_cs);
+ /* there is no centiseconds field for atime */
+ node->atime = exfat_exfat2unix(meta1->adate, meta1->atime, 0);
+}
+
+static void init_node_meta2(struct exfat_node* node,
+ const struct exfat_entry_meta2* meta2)
+{
+ node->size = le64_to_cpu(meta2->size);
+ node->start_cluster = le32_to_cpu(meta2->start_cluster);
+ node->fptr_cluster = node->start_cluster;
+ if (meta2->flags & EXFAT_FLAG_CONTIGUOUS)
+ node->flags |= EXFAT_ATTRIB_CONTIGUOUS;
+}
+
+static const struct exfat_entry* get_entry_ptr(const struct exfat* ef,
+ const struct iterator* it)
+{
+ return (const struct exfat_entry*)
+ (it->chunk + it->offset % CLUSTER_SIZE(*ef->sb));
+}
+
+/*
+ * Reads one entry in directory at position pointed by iterator and fills
+ * node structure.
+ */
+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;
+ const struct exfat_entry_name* file_name;
+ const struct exfat_entry_upcase* upcase;
+ const struct exfat_entry_bitmap* bitmap;
+ const struct exfat_entry_label* label;
+ uint8_t continuations = 0;
+ le16_t* namep = NULL;
+ uint16_t reference_checksum = 0;
+ uint16_t actual_checksum = 0;
+ uint64_t real_size = 0;
+
+ *node = NULL;
+
+ for (;;)
+ {
+ if (it->offset >= parent->size)
+ {
+ if (continuations != 0)
+ {
+ exfat_error("expected %hhu continuations", continuations);
+ goto error;
+ }
+ return -ENOENT; /* that's OK, means end of directory */
+ }
+
+ entry = get_entry_ptr(ef, it);
+ switch (entry->type)
+ {
+ case EXFAT_ENTRY_FILE:
+ if (continuations != 0)
+ {
+ exfat_error("expected %hhu continuations before new entry",
+ continuations);
+ goto error;
+ }
+ meta1 = (const struct exfat_entry_meta1*) entry;
+ continuations = meta1->continuations;
+ /* each file entry must have at least 2 continuations:
+ info and name */
+ if (continuations < 2)
+ {
+ exfat_error("too few continuations (%hhu)", continuations);
+ goto error;
+ }
+ reference_checksum = le16_to_cpu(meta1->checksum);
+ actual_checksum = exfat_start_checksum(meta1);
+ *node = allocate_node();
+ if (*node == NULL)
+ {
+ rc = -ENOMEM;
+ goto error;
+ }
+ /* new node has zero reference counter */
+ (*node)->entry_cluster = it->cluster;
+ (*node)->entry_offset = it->offset;
+ init_node_meta1(*node, meta1);
+ namep = (*node)->name;
+ break;
+
+ case EXFAT_ENTRY_FILE_INFO:
+ if (continuations < 2)
+ {
+ exfat_error("unexpected continuation (%hhu)",
+ continuations);
+ goto error;
+ }
+ meta2 = (const struct exfat_entry_meta2*) entry;
+ if (meta2->flags & ~(EXFAT_FLAG_ALWAYS1 | EXFAT_FLAG_CONTIGUOUS))
+ {
+ exfat_error("unknown flags in meta2 (0x%hhx)", meta2->flags);
+ goto error;
+ }
+ init_node_meta2(*node, meta2);
+ actual_checksum = exfat_add_checksum(entry, actual_checksum);
+ real_size = le64_to_cpu(meta2->real_size);
+ /* empty files must be marked as non-contiguous */
+ if ((*node)->size == 0 && (meta2->flags & EXFAT_FLAG_CONTIGUOUS))
+ {
+ exfat_error("empty file marked as contiguous (0x%hhx)",
+ meta2->flags);
+ goto error;
+ }
+ /* directories must be aligned on at cluster boundary */
+ if (((*node)->flags & EXFAT_ATTRIB_DIR) &&
+ (*node)->size % CLUSTER_SIZE(*ef->sb) != 0)
+ {
+ exfat_error("directory has invalid size %"PRIu64" bytes",
+ (*node)->size);
+ goto error;
+ }
+ --continuations;
+ break;
+
+ case EXFAT_ENTRY_FILE_NAME:
+ if (continuations == 0)
+ {
+ exfat_error("unexpected continuation");
+ goto error;
+ }
+ file_name = (const struct exfat_entry_name*) entry;
+ actual_checksum = exfat_add_checksum(entry, actual_checksum);
+
+ memcpy(namep, file_name->name, EXFAT_ENAME_MAX * sizeof(le16_t));
+ namep += EXFAT_ENAME_MAX;
+ if (--continuations == 0)
+ {
+ /*
+ There are two fields that contain file size. Maybe they
+ plan to add compression support in the future and one of
+ those fields is visible (uncompressed) size and the other
+ is real (compressed) size. Anyway, currently it looks like
+ exFAT does not support compression and both fields must be
+ equal.
+
+ There is an exception though: pagefile.sys (its real_size
+ is always 0).
+ */
+ if (real_size != (*node)->size)
+ {
+ char buffer[EXFAT_NAME_MAX + 1];
+
+ exfat_get_name(*node, buffer, EXFAT_NAME_MAX);
+ exfat_error("`%s' real size does not equal to size "
+ "(%"PRIu64" != %"PRIu64")", buffer,
+ real_size, (*node)->size);
+ goto error;
+ }
+ if (actual_checksum != reference_checksum)
+ {
+ char buffer[EXFAT_NAME_MAX + 1];
+
+ exfat_get_name(*node, buffer, EXFAT_NAME_MAX);
+ exfat_error("`%s' has invalid checksum (0x%hx != 0x%hx)",
+ buffer, actual_checksum, reference_checksum);
+ goto error;
+ }
+ if (fetch_next_entry(ef, parent, it) != 0)
+ goto error;
+ return 0; /* entry completed */
+ }
+ break;
+
+ case EXFAT_ENTRY_UPCASE:
+ if (ef->upcase != NULL)
+ break;
+ upcase = (const struct exfat_entry_upcase*) entry;
+ if (CLUSTER_INVALID(le32_to_cpu(upcase->start_cluster)))
+ {
+ exfat_error("invalid cluster 0x%x in upcase table",
+ le32_to_cpu(upcase->start_cluster));
+ goto error;
+ }
+ if (le64_to_cpu(upcase->size) == 0 ||
+ le64_to_cpu(upcase->size) > 0xffff * sizeof(uint16_t) ||
+ le64_to_cpu(upcase->size) % sizeof(uint16_t) != 0)
+ {
+ exfat_error("bad upcase table size (%"PRIu64" bytes)",
+ le64_to_cpu(upcase->size));
+ 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));
+ rc = -ENOMEM;
+ goto error;
+ }
+ ef->upcase_chars = le64_to_cpu(upcase->size) / sizeof(le16_t);
+
+ exfat_pread(ef->dev, ef->upcase, le64_to_cpu(upcase->size),
+ exfat_c2o(ef, le32_to_cpu(upcase->start_cluster)));
+ break;
+
+ case EXFAT_ENTRY_BITMAP:
+ bitmap = (const struct exfat_entry_bitmap*) entry;
+ ef->cmap.start_cluster = le32_to_cpu(bitmap->start_cluster);
+ if (CLUSTER_INVALID(ef->cmap.start_cluster))
+ {
+ exfat_error("invalid cluster 0x%x in clusters bitmap",
+ ef->cmap.start_cluster);
+ goto error;
+ }
+ ef->cmap.size = le32_to_cpu(ef->sb->cluster_count) -
+ EXFAT_FIRST_DATA_CLUSTER;
+ if (le64_to_cpu(bitmap->size) < (ef->cmap.size + 7) / 8)
+ {
+ exfat_error("invalid clusters bitmap size: %"PRIu64
+ " (expected at least %u)",
+ le64_to_cpu(bitmap->size), (ef->cmap.size + 7) / 8);
+ goto error;
+ }
+ /* FIXME bitmap can be rather big, up to 512 MB */
+ ef->cmap.chunk_size = ef->cmap.size;
+ ef->cmap.chunk = malloc(le64_to_cpu(bitmap->size));
+ if (ef->cmap.chunk == NULL)
+ {
+ exfat_error("failed to allocate clusters bitmap chunk "
+ "(%"PRIu64" bytes)", le64_to_cpu(bitmap->size));
+ rc = -ENOMEM;
+ goto error;
+ }
+
+ exfat_pread(ef->dev, ef->cmap.chunk, le64_to_cpu(bitmap->size),
+ exfat_c2o(ef, ef->cmap.start_cluster));
+ break;
+
+ case EXFAT_ENTRY_LABEL:
+ label = (const struct exfat_entry_label*) entry;
+ if (label->length > EXFAT_ENAME_MAX)
+ {
+ exfat_error("too long label (%hhu chars)", label->length);
+ goto error;
+ }
+ if (utf16_to_utf8(ef->label, label->name,
+ sizeof(ef->label), EXFAT_ENAME_MAX) != 0)
+ goto error;
+ break;
+
+ default:
+ if (entry->type & EXFAT_ENTRY_VALID)
+ {
+ exfat_error("unknown entry type 0x%hhx", entry->type);
+ goto error;
+ }
+ break;
+ }
+
+ if (fetch_next_entry(ef, parent, it) != 0)
+ goto error;
+ }
+ /* we never reach here */
+
+error:
+ free(*node);
+ *node = NULL;
+ return rc;
+}
+
+int exfat_cache_directory(struct exfat* ef, struct exfat_node* dir)
+{
+ struct iterator it;
+ int rc;
+ struct exfat_node* node;
+ struct exfat_node* current = NULL;
+
+ if (dir->flags & EXFAT_ATTRIB_CACHED)
+ return 0; /* already cached */
+
+ rc = opendir(ef, dir, &it);
+ if (rc != 0)
+ return rc;
+ while ((rc = readdir(ef, dir, &node, &it)) == 0)
+ {
+ node->parent = dir;
+ if (current != NULL)
+ {
+ current->next = node;
+ node->prev = current;
+ }
+ else
+ dir->child = node;
+
+ current = node;
+ }
+ closedir(&it);
+
+ if (rc != -ENOENT)
+ {
+ /* rollback */
+ for (current = dir->child; current; current = node)
+ {
+ node = current->next;
+ free(current);
+ }
+ dir->child = NULL;
+ return rc;
+ }
+
+ dir->flags |= EXFAT_ATTRIB_CACHED;
+ return 0;
+}
+
+static void tree_attach(struct exfat_node* dir, struct exfat_node* node)
+{
+ node->parent = dir;
+ if (dir->child)
+ {
+ dir->child->prev = node;
+ node->next = dir->child;
+ }
+ dir->child = node;
+}
+
+static void tree_detach(struct exfat_node* node)
+{
+ if (node->prev)
+ node->prev->next = node->next;
+ else /* this is the first node in the list */
+ node->parent->child = node->next;
+ if (node->next)
+ node->next->prev = node->prev;
+ node->parent = NULL;
+ node->prev = NULL;
+ node->next = NULL;
+}
+
+static void reset_cache(struct exfat* ef, struct exfat_node* node)
+{
+ while (node->child)
+ {
+ struct exfat_node* p = node->child;
+ reset_cache(ef, p);
+ tree_detach(p);
+ free(p);
+ }
+ node->flags &= ~EXFAT_ATTRIB_CACHED;
+ if (node->references != 0)
+ {
+ char buffer[EXFAT_NAME_MAX + 1];
+ exfat_get_name(node, buffer, EXFAT_NAME_MAX);
+ exfat_warn("non-zero reference counter (%d) for `%s'",
+ node->references, buffer);
+ }
+ while (node->references)
+ exfat_put_node(ef, node);
+}
+
+void exfat_reset_cache(struct exfat* ef)
+{
+ reset_cache(ef, ef->root);
+}
+
+void next_entry(struct exfat* ef, const struct exfat_node* parent,
+ cluster_t* cluster, off64_t* offset)
+{
+ *offset += sizeof(struct exfat_entry);
+ if (*offset % CLUSTER_SIZE(*ef->sb) == 0)
+ /* next cluster cannot be invalid */
+ *cluster = exfat_next_cluster(ef, parent, *cluster);
+}
+
+void exfat_flush_node(struct exfat* ef, struct exfat_node* node)
+{
+ cluster_t cluster;
+ off64_t offset;
+ off64_t meta1_offset, meta2_offset;
+ struct exfat_entry_meta1 meta1;
+ struct exfat_entry_meta2 meta2;
+
+ if (ef->ro)
+ exfat_bug("unable to flush node to read-only FS");
+
+ if (node->parent == NULL)
+ return; /* do not flush unlinked node */
+
+ cluster = node->entry_cluster;
+ offset = node->entry_offset;
+ meta1_offset = co2o(ef, cluster, offset);
+ next_entry(ef, node->parent, &cluster, &offset);
+ meta2_offset = co2o(ef, cluster, offset);
+
+ exfat_pread(ef->dev, &meta1, sizeof(meta1), meta1_offset);
+ if (meta1.type != EXFAT_ENTRY_FILE)
+ exfat_bug("invalid type of meta1: 0x%hhx", meta1.type);
+ meta1.attrib = cpu_to_le16(node->flags);
+ exfat_unix2exfat(node->mtime, &meta1.mdate, &meta1.mtime, &meta1.mtime_cs);
+ exfat_unix2exfat(node->atime, &meta1.adate, &meta1.atime, NULL);
+
+ exfat_pread(ef->dev, &meta2, sizeof(meta2), meta2_offset);
+ if (meta2.type != EXFAT_ENTRY_FILE_INFO)
+ exfat_bug("invalid type of meta2: 0x%hhx", meta2.type);
+ meta2.size = meta2.real_size = cpu_to_le64(node->size);
+ meta2.start_cluster = cpu_to_le32(node->start_cluster);
+ meta2.flags = EXFAT_FLAG_ALWAYS1;
+ /* empty files must not be marked as contiguous */
+ if (node->size != 0 && IS_CONTIGUOUS(*node))
+ meta2.flags |= EXFAT_FLAG_CONTIGUOUS;
+ /* name hash remains unchanged, no need to recalculate it */
+
+ meta1.checksum = exfat_calc_checksum(&meta1, &meta2, node->name);
+
+ exfat_pwrite(ef->dev, &meta1, sizeof(meta1), meta1_offset);
+ exfat_pwrite(ef->dev, &meta2, sizeof(meta2), meta2_offset);
+
+ node->flags &= ~EXFAT_ATTRIB_DIRTY;
+}
+
+static void erase_entry(struct exfat* ef, struct exfat_node* node)
+{
+ cluster_t cluster = node->entry_cluster;
+ off64_t offset = node->entry_offset;
+ int name_entries = DIV_ROUND_UP(utf16_length(node->name), EXFAT_ENAME_MAX);
+ uint8_t entry_type;
+
+ entry_type = EXFAT_ENTRY_FILE & ~EXFAT_ENTRY_VALID;
+ exfat_pwrite(ef->dev, &entry_type, 1, co2o(ef, cluster, offset));
+
+ next_entry(ef, node->parent, &cluster, &offset);
+ entry_type = EXFAT_ENTRY_FILE_INFO & ~EXFAT_ENTRY_VALID;
+ exfat_pwrite(ef->dev, &entry_type, 1, co2o(ef, cluster, offset));
+
+ while (name_entries--)
+ {
+ next_entry(ef, node->parent, &cluster, &offset);
+ entry_type = EXFAT_ENTRY_FILE_NAME & ~EXFAT_ENTRY_VALID;
+ exfat_pwrite(ef->dev, &entry_type, 1, co2o(ef, cluster, offset));
+ }
+}
+
+static int shrink_directory(struct exfat* ef, struct exfat_node* dir,
+ off64_t deleted_offset)
+{
+ const struct exfat_node* node;
+ const struct exfat_node* last_node;
+ uint64_t entries = 0;
+ uint64_t new_size;
+ int rc;
+
+ if (!(dir->flags & EXFAT_ATTRIB_DIR))
+ exfat_bug("attempted to shrink a file");
+ if (!(dir->flags & EXFAT_ATTRIB_CACHED))
+ exfat_bug("attempted to shrink uncached directory");
+
+ for (last_node = node = dir->child; node; node = node->next)
+ {
+ if (deleted_offset < node->entry_offset)
+ {
+ /* there are other entries after the removed one, no way to shrink
+ this directory */
+ return 0;
+ }
+ if (last_node->entry_offset < node->entry_offset)
+ last_node = node;
+ }
+
+ if (last_node)
+ {
+ /* offset of the last entry */
+ entries += last_node->entry_offset / sizeof(struct exfat_entry);
+ /* two subentries with meta info */
+ entries += 2;
+ /* subentries with file name */
+ entries += DIV_ROUND_UP(utf16_length(last_node->name),
+ EXFAT_ENAME_MAX);
+ }
+
+ new_size = DIV_ROUND_UP(entries * sizeof(struct exfat_entry),
+ CLUSTER_SIZE(*ef->sb)) * CLUSTER_SIZE(*ef->sb);
+ if (new_size == 0) /* directory always has at least 1 cluster */
+ new_size = CLUSTER_SIZE(*ef->sb);
+ if (new_size == dir->size)
+ return 0;
+ rc = exfat_truncate(ef, dir, new_size);
+ if (rc != 0)
+ return rc;
+ return 0;
+}
+
+static int delete(struct exfat* ef, struct exfat_node* node)
+{
+ struct exfat_node* parent = node->parent;
+ off64_t deleted_offset = node->entry_offset;
+ int rc;
+
+ exfat_get_node(parent);
+ erase_entry(ef, node);
+ exfat_update_mtime(parent);
+ tree_detach(node);
+ rc = shrink_directory(ef, parent, deleted_offset);
+ exfat_put_node(ef, parent);
+ /* file clusters will be freed when node reference counter becomes 0 */
+ node->flags |= EXFAT_ATTRIB_UNLINKED;
+ return rc;
+}
+
+int exfat_unlink(struct exfat* ef, struct exfat_node* node)
+{
+ if (node->flags & EXFAT_ATTRIB_DIR)
+ return -EISDIR;
+ return delete(ef, node);
+}
+
+int exfat_rmdir(struct exfat* ef, struct exfat_node* node)
+{
+ if (!(node->flags & EXFAT_ATTRIB_DIR))
+ return -ENOTDIR;
+ /* check that directory is empty */
+ exfat_cache_directory(ef, node);
+ if (node->child)
+ return -ENOTEMPTY;
+ return delete(ef, node);
+}
+
+static int grow_directory(struct exfat* ef, struct exfat_node* dir,
+ uint64_t asize, uint32_t difference)
+{
+ return exfat_truncate(ef, dir,
+ DIV_ROUND_UP(asize + difference, CLUSTER_SIZE(*ef->sb))
+ * CLUSTER_SIZE(*ef->sb));
+}
+
+static int find_slot(struct exfat* ef, struct exfat_node* dir,
+ cluster_t* cluster, off64_t* offset, int subentries)
+{
+ struct iterator it;
+ int rc;
+ const struct exfat_entry* entry;
+ int contiguous = 0;
+
+ rc = opendir(ef, dir, &it);
+ if (rc != 0)
+ return rc;
+ for (;;)
+ {
+ if (contiguous == 0)
+ {
+ *cluster = it.cluster;
+ *offset = it.offset;
+ }
+ entry = get_entry_ptr(ef, &it);
+ if (entry->type & EXFAT_ENTRY_VALID)
+ contiguous = 0;
+ else
+ contiguous++;
+ if (contiguous == subentries)
+ break; /* suitable slot is found */
+ if (it.offset + sizeof(struct exfat_entry) >= dir->size)
+ {
+ rc = grow_directory(ef, dir, dir->size,
+ (subentries - contiguous) * sizeof(struct exfat_entry));
+ if (rc != 0)
+ {
+ closedir(&it);
+ return rc;
+ }
+ }
+ if (fetch_next_entry(ef, dir, &it) != 0)
+ {
+ closedir(&it);
+ return -EIO;
+ }
+ }
+ closedir(&it);
+ return 0;
+}
+
+static int write_entry(struct exfat* ef, struct exfat_node* dir,
+ const le16_t* name, cluster_t cluster, off64_t offset, uint16_t attrib)
+{
+ struct exfat_node* node;
+ struct exfat_entry_meta1 meta1;
+ struct exfat_entry_meta2 meta2;
+ const size_t name_length = utf16_length(name);
+ const int name_entries = DIV_ROUND_UP(name_length, EXFAT_ENAME_MAX);
+ int i;
+
+ node = allocate_node();
+ if (node == NULL)
+ return -ENOMEM;
+ node->entry_cluster = cluster;
+ node->entry_offset = offset;
+ memcpy(node->name, name, name_length * sizeof(le16_t));
+
+ memset(&meta1, 0, sizeof(meta1));
+ meta1.type = EXFAT_ENTRY_FILE;
+ meta1.continuations = 1 + name_entries;
+ meta1.attrib = cpu_to_le16(attrib);
+ exfat_unix2exfat(time(NULL), &meta1.crdate, &meta1.crtime,
+ &meta1.crtime_cs);
+ meta1.adate = meta1.mdate = meta1.crdate;
+ meta1.atime = meta1.mtime = meta1.crtime;
+ meta1.mtime_cs = meta1.crtime_cs; /* there is no atime_cs */
+
+ memset(&meta2, 0, sizeof(meta2));
+ meta2.type = EXFAT_ENTRY_FILE_INFO;
+ meta2.flags = EXFAT_FLAG_ALWAYS1;
+ meta2.name_length = name_length;
+ meta2.name_hash = exfat_calc_name_hash(ef, node->name);
+ meta2.start_cluster = cpu_to_le32(EXFAT_CLUSTER_FREE);
+
+ meta1.checksum = exfat_calc_checksum(&meta1, &meta2, node->name);
+
+ exfat_pwrite(ef->dev, &meta1, sizeof(meta1), co2o(ef, cluster, offset));
+ next_entry(ef, dir, &cluster, &offset);
+ exfat_pwrite(ef->dev, &meta2, sizeof(meta2), co2o(ef, cluster, offset));
+ for (i = 0; i < name_entries; i++)
+ {
+ struct exfat_entry_name name_entry = {EXFAT_ENTRY_FILE_NAME, 0};
+ memcpy(name_entry.name, node->name + i * EXFAT_ENAME_MAX,
+ EXFAT_ENAME_MAX * sizeof(le16_t));
+ next_entry(ef, dir, &cluster, &offset);
+ exfat_pwrite(ef->dev, &name_entry, sizeof(name_entry),
+ co2o(ef, cluster, offset));
+ }
+
+ init_node_meta1(node, &meta1);
+ init_node_meta2(node, &meta2);
+
+ tree_attach(dir, node);
+ exfat_update_mtime(dir);
+ return 0;
+}
+
+static int create(struct exfat* ef, const char* path, uint16_t attrib)
+{
+ struct exfat_node* dir;
+ struct exfat_node* existing;
+ cluster_t cluster = EXFAT_CLUSTER_BAD;
+ off64_t offset = -1;
+ le16_t name[EXFAT_NAME_MAX + 1];
+ int rc;
+
+ rc = exfat_split(ef, &dir, &existing, name, path);
+ if (rc != 0)
+ return rc;
+ if (existing != NULL)
+ {
+ exfat_put_node(ef, existing);
+ exfat_put_node(ef, dir);
+ return -EEXIST;
+ }
+
+ rc = find_slot(ef, dir, &cluster, &offset,
+ 2 + DIV_ROUND_UP(utf16_length(name), EXFAT_ENAME_MAX));
+ if (rc != 0)
+ {
+ exfat_put_node(ef, dir);
+ return rc;
+ }
+ rc = write_entry(ef, dir, name, cluster, offset, attrib);
+ exfat_put_node(ef, dir);
+ return rc;
+}
+
+int exfat_mknod(struct exfat* ef, const char* path)
+{
+ return create(ef, path, EXFAT_ATTRIB_ARCH);
+}
+
+int exfat_mkdir(struct exfat* ef, const char* path)
+{
+ int rc;
+ struct exfat_node* node;
+
+ rc = create(ef, path, EXFAT_ATTRIB_ARCH | EXFAT_ATTRIB_DIR);
+ if (rc != 0)
+ return rc;
+ rc = exfat_lookup(ef, &node, path);
+ if (rc != 0)
+ return 0;
+ /* directories always have at least one cluster */
+ rc = exfat_truncate(ef, node, CLUSTER_SIZE(*ef->sb));
+ if (rc != 0)
+ {
+ delete(ef, node);
+ exfat_put_node(ef, node);
+ return rc;
+ }
+ exfat_put_node(ef, node);
+ return 0;
+}
+
+static void rename_entry(struct exfat* ef, struct exfat_node* dir,
+ struct exfat_node* node, const le16_t* name, cluster_t new_cluster,
+ off64_t new_offset)
+{
+ struct exfat_entry_meta1 meta1;
+ struct exfat_entry_meta2 meta2;
+ cluster_t old_cluster = node->entry_cluster;
+ off64_t old_offset = node->entry_offset;
+ const size_t name_length = utf16_length(name);
+ const int name_entries = DIV_ROUND_UP(name_length, EXFAT_ENAME_MAX);
+ int i;
+
+ exfat_pread(ef->dev, &meta1, sizeof(meta1),
+ co2o(ef, old_cluster, old_offset));
+ next_entry(ef, node->parent, &old_cluster, &old_offset);
+ exfat_pread(ef->dev, &meta2, sizeof(meta2),
+ co2o(ef, old_cluster, old_offset));
+ meta1.continuations = 1 + name_entries;
+ meta2.name_hash = exfat_calc_name_hash(ef, name);
+ meta2.name_length = name_length;
+ meta1.checksum = exfat_calc_checksum(&meta1, &meta2, name);
+
+ erase_entry(ef, node);
+
+ node->entry_cluster = new_cluster;
+ node->entry_offset = new_offset;
+
+ exfat_pwrite(ef->dev, &meta1, sizeof(meta1),
+ co2o(ef, new_cluster, new_offset));
+ next_entry(ef, dir, &new_cluster, &new_offset);
+ exfat_pwrite(ef->dev, &meta2, sizeof(meta2),
+ co2o(ef, new_cluster, new_offset));
+
+ for (i = 0; i < name_entries; i++)
+ {
+ struct exfat_entry_name name_entry = {EXFAT_ENTRY_FILE_NAME, 0};
+ memcpy(name_entry.name, name + i * EXFAT_ENAME_MAX,
+ EXFAT_ENAME_MAX * sizeof(le16_t));
+ next_entry(ef, dir, &new_cluster, &new_offset);
+ exfat_pwrite(ef->dev, &name_entry, sizeof(name_entry),
+ co2o(ef, new_cluster, new_offset));
+ }
+
+ memcpy(node->name, name, (EXFAT_NAME_MAX + 1) * sizeof(le16_t));
+ tree_detach(node);
+ tree_attach(dir, node);
+}
+
+int exfat_rename(struct exfat* ef, const char* old_path, const char* new_path)
+{
+ struct exfat_node* node;
+ struct exfat_node* existing;
+ struct exfat_node* dir;
+ cluster_t cluster = EXFAT_CLUSTER_BAD;
+ off64_t offset = -1;
+ le16_t name[EXFAT_NAME_MAX + 1];
+ int rc;
+
+ rc = exfat_lookup(ef, &node, old_path);
+ if (rc != 0)
+ return rc;
+
+ rc = exfat_split(ef, &dir, &existing, name, new_path);
+ if (rc != 0)
+ {
+ exfat_put_node(ef, node);
+ return rc;
+ }
+ if (existing != NULL)
+ {
+ /* remove target if it's not the same node as source */
+ if (existing != node)
+ {
+ if (existing->flags & EXFAT_ATTRIB_DIR)
+ {
+ if (node->flags & EXFAT_ATTRIB_DIR)
+ rc = exfat_rmdir(ef, existing);
+ else
+ rc = -ENOTDIR;
+ }
+ else
+ {
+ if (!(node->flags & EXFAT_ATTRIB_DIR))
+ rc = exfat_unlink(ef, existing);
+ else
+ rc = -EISDIR;
+ }
+ exfat_put_node(ef, existing);
+ if (rc != 0)
+ {
+ exfat_put_node(ef, dir);
+ exfat_put_node(ef, node);
+ return rc;
+ }
+ }
+ else
+ exfat_put_node(ef, existing);
+ }
+
+ rc = find_slot(ef, dir, &cluster, &offset,
+ 2 + DIV_ROUND_UP(utf16_length(name), EXFAT_ENAME_MAX));
+ if (rc != 0)
+ {
+ exfat_put_node(ef, dir);
+ exfat_put_node(ef, node);
+ return rc;
+ }
+ rename_entry(ef, dir, node, name, cluster, offset);
+ exfat_put_node(ef, dir);
+ exfat_put_node(ef, node);
+ return 0;
+}
+
+void exfat_utimes(struct exfat_node* node, const struct timespec tv[2])
+{
+ node->atime = tv[0].tv_sec;
+ node->mtime = tv[1].tv_sec;
+ node->flags |= EXFAT_ATTRIB_DIRTY;
+}
+
+void exfat_update_atime(struct exfat_node* node)
+{
+ node->atime = time(NULL);
+ node->flags |= EXFAT_ATTRIB_DIRTY;
+}
+
+void exfat_update_mtime(struct exfat_node* node)
+{
+ node->mtime = time(NULL);
+ node->flags |= EXFAT_ATTRIB_DIRTY;
+}
+
+const char* exfat_get_label(struct exfat* ef)
+{
+ return ef->label;
+}
+
+static int find_label(struct exfat* ef, cluster_t* cluster, off64_t* offset)
+{
+ struct iterator it;
+ int rc;
+
+ rc = opendir(ef, ef->root, &it);
+ if (rc != 0)
+ return rc;
+
+ for (;;)
+ {
+ if (it.offset >= ef->root->size)
+ {
+ closedir(&it);
+ return -ENOENT;
+ }
+
+ if (get_entry_ptr(ef, &it)->type == EXFAT_ENTRY_LABEL)
+ {
+ *cluster = it.cluster;
+ *offset = it.offset;
+ closedir(&it);
+ return 0;
+ }
+
+ if (fetch_next_entry(ef, ef->root, &it) != 0)
+ {
+ closedir(&it);
+ return -EIO;
+ }
+ }
+}
+
+int exfat_set_label(struct exfat* ef, const char* label)
+{
+ le16_t label_utf16[EXFAT_ENAME_MAX + 1];
+ int rc;
+ cluster_t cluster;
+ off64_t offset;
+ struct exfat_entry_label entry;
+
+ memset(label_utf16, 0, sizeof(label_utf16));
+ rc = utf8_to_utf16(label_utf16, label, EXFAT_ENAME_MAX, strlen(label));
+ if (rc != 0)
+ return rc;
+
+ rc = find_label(ef, &cluster, &offset);
+ if (rc == -ENOENT)
+ rc = find_slot(ef, ef->root, &cluster, &offset, 1);
+ if (rc != 0)
+ return rc;
+
+ entry.type = EXFAT_ENTRY_LABEL;
+ entry.length = utf16_length(label_utf16);
+ memcpy(entry.name, label_utf16, sizeof(entry.name));
+ if (entry.length == 0)
+ entry.type ^= EXFAT_ENTRY_VALID;
+
+ exfat_pwrite(ef->dev, &entry, sizeof(struct exfat_entry_label),
+ co2o(ef, cluster, offset));
+ return 0;
+}
diff --git a/fuse/fuse.c b/fuse/fuse.c
index 448c9cd50..98170cf9a 100644
--- a/fuse/fuse.c
+++ b/fuse/fuse.c
@@ -517,6 +517,7 @@ static int try_get_path(struct fuse *f, fuse_ino_t nodeid, const char *name,
if (name != NULL) {
s = add_name(&buf, &bufsize, s, name);
err = -ENOMEM;
+ printf("setting err to ENOMEM\n");
if (s == NULL)
goto out_free;
}
@@ -530,6 +531,7 @@ static int try_get_path(struct fuse *f, fuse_ino_t nodeid, const char *name,
if (!wnode->ticket)
wnode->ticket = ticket;
err = -EAGAIN;
+ printf("setting err to EAGAIN\n");
goto out_free;
}
wnode->treelock = -1;
@@ -541,16 +543,19 @@ static int try_get_path(struct fuse *f, fuse_ino_t nodeid, const char *name,
for (node = get_node(f, nodeid); node->nodeid != FUSE_ROOT_ID;
node = node->parent) {
err = -ENOENT;
+ printf("setting err to ENOENT\n");
if (node->name == NULL || node->parent == NULL)
goto out_unlock;
err = -ENOMEM;
+ printf("setting err to ENOMEM\n");
s = add_name(&buf, &bufsize, s, node->name);
if (s == NULL)
goto out_unlock;
if (ticket) {
err = -EAGAIN;
+ printf("setting err to EAGAIN\n");
if (node->treelock == -1 ||
(node->ticket && node->ticket != ticket))
goto out_unlock;
diff --git a/fuse/fuse_lowlevel.c b/fuse/fuse_lowlevel.c
index 90f756e54..2e0ad0fd9 100644
--- a/fuse/fuse_lowlevel.c
+++ b/fuse/fuse_lowlevel.c
@@ -177,8 +177,10 @@ int fuse_reply_iov(fuse_req_t req, const struct iovec *iov, int count)
struct iovec *padded_iov;
padded_iov = malloc((count + 1) * sizeof(struct iovec));
- if (padded_iov == NULL)
+ if (padded_iov == NULL) {
+ printf("ENOMEM fuse_reply_iov\n");
return fuse_reply_err(req, -ENOMEM);
+ }
memcpy(padded_iov + 1, iov, count * sizeof(struct iovec));
count++;
@@ -308,8 +310,10 @@ int fuse_reply_entry(fuse_req_t req, const struct fuse_entry_param *e)
/* before ABI 7.4 e->ino == 0 was invalid, only ENOENT meant
negative entry */
- if (!e->ino && req->f->conn.proto_minor < 4)
+ if (!e->ino && req->f->conn.proto_minor < 4) {
+ printf("ENOENT fuse_reply_entry\n");
return fuse_reply_err(req, ENOENT);
+ }
memset(&arg, 0, sizeof(arg));
fill_entry(&arg, e);
@@ -485,8 +489,10 @@ int fuse_reply_ioctl_iov(fuse_req_t req, int result, const struct iovec *iov,
int res;
padded_iov = malloc((count + 2) * sizeof(struct iovec));
- if (padded_iov == NULL)
+ if (padded_iov == NULL) {
+ printf("ENOMEM fuse_reply_err\n");
return fuse_reply_err(req, -ENOMEM);
+ }
memset(&arg, 0, sizeof(arg));
arg.result = result;
@@ -517,8 +523,10 @@ static void do_lookup(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.lookup)
req->f->op.lookup(req, nodeid, name);
- else
+ else {
+ printf("ENOSYS do_lookup\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_forget(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -549,8 +557,10 @@ static void do_getattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.getattr)
req->f->op.getattr(req, nodeid, fip);
- else
+ else {
+ printf("ENOSYS do_getattr\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_setattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -581,8 +591,10 @@ static void do_setattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
FUSE_SET_ATTR_MTIME_NOW;
req->f->op.setattr(req, nodeid, &stbuf, arg->valid, fi);
- } else
+ } else {
+ printf("ENOSYS do_setattr\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_access(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -591,8 +603,10 @@ static void do_access(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.access)
req->f->op.access(req, nodeid, arg->mask);
- else
+ else {
+ printf("ENOSYS do_access\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_readlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -601,8 +615,10 @@ static void do_readlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.readlink)
req->f->op.readlink(req, nodeid);
- else
+ else {
+ printf("ENOSYS do_readlink\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_mknod(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -617,8 +633,10 @@ static void do_mknod(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.mknod)
req->f->op.mknod(req, nodeid, name, arg->mode, arg->rdev);
- else
+ else {
+ printf("ENOSYS do_mknod\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_mkdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -630,8 +648,10 @@ static void do_mkdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.mkdir)
req->f->op.mkdir(req, nodeid, PARAM(arg), arg->mode);
- else
+ else {
+ printf("ENOSYS do_mkdir\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_unlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -640,8 +660,10 @@ static void do_unlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.unlink)
req->f->op.unlink(req, nodeid, name);
- else
+ else {
+ printf("ENOSYS do_unlink\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_rmdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -650,8 +672,10 @@ static void do_rmdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.rmdir)
req->f->op.rmdir(req, nodeid, name);
- else
+ else {
+ printf("ENOSYS do_rmdir\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_symlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -661,8 +685,10 @@ static void do_symlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.symlink)
req->f->op.symlink(req, linkname, nodeid, name);
- else
+ else {
+ printf("ENOSYS do_symlink\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_rename(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -673,8 +699,10 @@ static void do_rename(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.rename)
req->f->op.rename(req, nodeid, oldname, arg->newdir, newname);
- else
+ else {
+ printf("ENOSYS do_rename\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_link(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -683,8 +711,10 @@ static void do_link(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.link)
req->f->op.link(req, arg->oldnodeid, nodeid, PARAM(arg));
- else
+ else {
+ printf("ENOSYS do_link\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_create(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -704,8 +734,10 @@ static void do_create(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
name = (char *) inarg + sizeof(struct fuse_open_in);
req->f->op.create(req, nodeid, name, arg->mode, &fi);
- } else
+ } else {
+ printf("ENOSYS do_create\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_open(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -737,8 +769,10 @@ static void do_read(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
fi.flags = arg->flags;
}
req->f->op.read(req, nodeid, arg->size, arg->offset, &fi);
- } else
+ } else {
+ printf("ENOSYS do_read\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_write(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -763,8 +797,10 @@ static void do_write(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.write)
req->f->op.write(req, nodeid, param, arg->size,
arg->offset, &fi);
- else
+ else {
+ printf("ENOSYS do_write\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_flush(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -781,8 +817,10 @@ static void do_flush(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.flush)
req->f->op.flush(req, nodeid, &fi);
- else
+ else {
+ printf("ENOSYS do_flush\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_release(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -816,8 +854,10 @@ static void do_fsync(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.fsync)
req->f->op.fsync(req, nodeid, arg->fsync_flags & 1, &fi);
- else
+ else {
+ printf("ENOSYS do_fsync\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_opendir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -845,8 +885,10 @@ static void do_readdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.readdir)
req->f->op.readdir(req, nodeid, arg->size, arg->offset, &fi);
- else
+ else {
+ printf("ENOSYS do_fsync\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_releasedir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -876,8 +918,10 @@ static void do_fsyncdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.fsyncdir)
req->f->op.fsyncdir(req, nodeid, arg->fsync_flags & 1, &fi);
- else
+ else {
+ printf("ENOSYS do_fsyncdir\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_statfs(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -905,8 +949,10 @@ static void do_setxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.setxattr)
req->f->op.setxattr(req, nodeid, name, value, arg->size,
arg->flags);
- else
+ else {
+ printf("ENOSYS do_setxattr\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_getxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -915,8 +961,10 @@ static void do_getxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.getxattr)
req->f->op.getxattr(req, nodeid, PARAM(arg), arg->size);
- else
+ else {
+ printf("ENOSYS do_getxattr\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_listxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -925,8 +973,10 @@ static void do_listxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.listxattr)
req->f->op.listxattr(req, nodeid, arg->size);
- else
+ else {
+ printf("ENOSYS do_listxattr\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_removexattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -935,8 +985,10 @@ static void do_removexattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.removexattr)
req->f->op.removexattr(req, nodeid, name);
- else
+ else {
+ printf("ENOSYS do_removetxattr\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void convert_fuse_file_lock(struct fuse_file_lock *fl,
@@ -966,8 +1018,10 @@ static void do_getlk(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
convert_fuse_file_lock(&arg->lk, &flock);
if (req->f->op.getlk)
req->f->op.getlk(req, nodeid, &fi, &flock);
- else
+ else {
+ printf("do_getlk ENOSYS\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_setlk_common(fuse_req_t req, fuse_ino_t nodeid,
@@ -984,8 +1038,10 @@ static void do_setlk_common(fuse_req_t req, fuse_ino_t nodeid,
convert_fuse_file_lock(&arg->lk, &flock);
if (req->f->op.setlk)
req->f->op.setlk(req, nodeid, &fi, &flock, sleep);
- else
+ else {
+ printf("do_getlk ENOSYS\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_setlk(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -1085,8 +1141,10 @@ static void do_bmap(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (req->f->op.bmap)
req->f->op.bmap(req, nodeid, arg->blocksize, arg->block);
- else
+ else {
+ printf("do_bmap ENOSYS\n");
fuse_reply_err(req, ENOSYS);
+ }
}
static void do_ioctl(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -1104,8 +1162,10 @@ static void do_ioctl(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
req->f->op.ioctl(req, nodeid, arg->cmd,
(void *)(uintptr_t)arg->arg, &fi, flags,
in_buf, arg->in_size, arg->out_size);
- else
+ else {
+ printf("do_ioctl ENOSYS\n");
fuse_reply_err(req, ENOSYS);
+ }
}
void fuse_pollhandle_destroy(struct fuse_pollhandle *ph)
@@ -1128,6 +1188,7 @@ static void do_poll(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (arg->flags & FUSE_POLL_SCHEDULE_NOTIFY) {
ph = malloc(sizeof(struct fuse_pollhandle));
if (ph == NULL) {
+ printf("ENOMEM do_poll\n");
fuse_reply_err(req, ENOMEM);
return;
}
@@ -1138,6 +1199,7 @@ static void do_poll(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
req->f->op.poll(req, nodeid, &fi, ph);
} else {
+ printf("ENOSYS do_poll\n");
fuse_reply_err(req, ENOSYS);
}
}
@@ -1170,6 +1232,7 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
if (arg->major < 7) {
fprintf(stderr, "fuse: unsupported protocol version: %u.%u\n",
arg->major, arg->minor);
+ printf("EPROTO do_init\n");
fuse_reply_err(req, EPROTO);
return;
}
@@ -1509,8 +1572,10 @@ static void fuse_ll_process(void *data, const char *buf, size_t len,
intr = check_interrupt(f, req);
list_add_req(req, &f->list);
pthread_mutex_unlock(&f->lock);
- if (intr)
+ if (intr) {
+ printf("EAGAIN fuse_llprocess\n");
fuse_reply_err(intr, EAGAIN);
+ }
}
fuse_ll_ops[in->opcode].func(req, in->nodeid, inarg);
return;
diff --git a/prebuilt/Android.mk b/prebuilt/Android.mk
index c47728272..57374318b 100644
--- a/prebuilt/Android.mk
+++ b/prebuilt/Android.mk
@@ -44,10 +44,10 @@ RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libflashutils.so
RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libstlport.so
RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libmincrypt.so
RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libext4_utils.so
+RELINK_SOURCE_FILES += $(TARGET_RECOVERY_ROOT_OUT)/sbin/mkexfatfs
-ifeq ($(TW_INCLUDE_EXFAT), true)
+ifeq ($(TW_INCLUDE_FUSE_EXFAT), true)
RELINK_SOURCE_FILES += $(TARGET_RECOVERY_ROOT_OUT)/sbin/exfat-fuse
- RELINK_SOURCE_FILES += $(TARGET_RECOVERY_ROOT_OUT)/sbin/mkexfatfs
endif
ifeq ($(TW_INCLUDE_BLOBPACK), true)
RELINK_SOURCE_FILES += $(TARGET_RECOVERY_ROOT_OUT)/sbin/blobpack