diff options
Diffstat (limited to 'exfat')
34 files changed, 84 insertions, 1506 deletions
diff --git a/exfat/ChangeLog b/exfat/ChangeLog index e42a095e0..e24b2d60b 100644 --- a/exfat/ChangeLog +++ b/exfat/ChangeLog @@ -1,3 +1,30 @@ +1.0.0 (2013-01-19) + +* Fixed crash when renaming a file within a single directory and a new name +differs only in case. +* Fixed clusters allocation: a cluster beyond valid clusters range could be +allocated. +* Fixed crash when a volume is unmounted while some files are open. +* SConscript now respects AR and RANLIB environment variables. +* Improved error handling. + +Linux: + +* Enabled big_writes. This improves write speed (larger block size means less +switches between kernel- and user-space). +* Do BLKROGET ioctl to make sure the device is not read-only: after +"blockdev --setro" kernel still allows to open the device in read-write mode +but fails writes. + +OS X: + +* Fixed OS X 10.8 support. +* Switched to 64-bit inode numbers (now Mac OS X 10.5 or later is required). +* Switched from unmaintained MacFUSE to OSXFUSE (http://osxfuse.github.com). +* Fixed device size detection. Now mkfs works. +* Workarounded some utilities failures due to missing chmod() support. +* Disabled (senseless) permission checks made by FUSE. + 0.9.8 (2012-08-09) * The mkfs utility can now create huge file systems (up to several exabytes). diff --git a/exfat/cluster.c b/exfat/cluster.c deleted file mode 100644 index 6b0303df8..000000000 --- a/exfat/cluster.c +++ /dev/null @@ -1,428 +0,0 @@ -/* - 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/dump/main.c b/exfat/dump/main.c index d7ea2a365..fa80903b8 100644 --- a/exfat/dump/main.c +++ b/exfat/dump/main.c @@ -2,7 +2,7 @@ main.c (08.11.10) Prints detailed information about exFAT volume. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 @@ -162,7 +162,7 @@ int main(int argc, char* argv[]) used_sectors = true; else if (strcmp(*pp, "-v") == 0) { - puts("Copyright (C) 2011, 2012 Andrew Nayenko"); + puts("Copyright (C) 2011-2013 Andrew Nayenko"); return 0; } else if (spec == NULL) diff --git a/exfat/exfat-fuse/main.c b/exfat/exfat-fuse/main.c index e50c14a74..7f4ac1896 100644 --- a/exfat/exfat-fuse/main.c +++ b/exfat/exfat-fuse/main.c @@ -2,7 +2,7 @@ main.c (01.09.09) FUSE-based exFAT implementation. Requires FUSE 2.6 or later. - Copyright (C) 2010-2012 Andrew Nayenko + Copyright (C) 2010-2013 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 @@ -438,7 +438,7 @@ int main(int argc, char* argv[]) else if (strcmp(*pp, "-v") == 0) { free(mount_options); - puts("Copyright (C) 2010-2012 Andrew Nayenko"); + puts("Copyright (C) 2010-2013 Andrew Nayenko"); return 0; } else if (spec == NULL) diff --git a/exfat/fsck/main.c b/exfat/fsck/main.c index c90e3f94b..9eefd747d 100644 --- a/exfat/fsck/main.c +++ b/exfat/fsck/main.c @@ -2,7 +2,7 @@ main.c (02.09.09) exFAT file system checker. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 @@ -141,7 +141,7 @@ int main(int argc, char* argv[]) { if (strcmp(*pp, "-v") == 0) { - puts("Copyright (C) 2011, 2012 Andrew Nayenko"); + puts("Copyright (C) 2011-2013 Andrew Nayenko"); return 0; } else if (spec == NULL) diff --git a/exfat/label/main.c b/exfat/label/main.c index b3a3d3036..8a429d58d 100644 --- a/exfat/label/main.c +++ b/exfat/label/main.c @@ -2,7 +2,7 @@ main.c (20.01.11) Prints or changes exFAT volume label. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 @@ -33,7 +33,7 @@ int main(int argc, char* argv[]) { printf("exfatlabel %u.%u.%u\n", EXFAT_VERSION_MAJOR, EXFAT_VERSION_MINOR, EXFAT_VERSION_PATCH); - puts("Copyright (C) 2011, 2012 Andrew Nayenko"); + puts("Copyright (C) 2011-2013 Andrew Nayenko"); return 0; } diff --git a/exfat/libexfat/byteorder.h b/exfat/libexfat/byteorder.h index 4850efb3d..6792f37c0 100644 --- a/exfat/libexfat/byteorder.h +++ b/exfat/libexfat/byteorder.h @@ -2,7 +2,7 @@ byteorder.h (12.01.10) Endianness stuff. exFAT uses little-endian byte order. - Copyright (C) 2010-2012 Andrew Nayenko + Copyright (C) 2010-2013 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 diff --git a/exfat/libexfat/cluster.c b/exfat/libexfat/cluster.c index cb3e87165..83c983da4 100644 --- a/exfat/libexfat/cluster.c +++ b/exfat/libexfat/cluster.c @@ -2,7 +2,7 @@ cluster.c (03.09.09) exFAT file system implementation library. - Copyright (C) 2010-2012 Andrew Nayenko + Copyright (C) 2010-2013 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 diff --git a/exfat/libexfat/exfat.h b/exfat/libexfat/exfat.h index 6f152670d..11be06f7b 100644 --- a/exfat/libexfat/exfat.h +++ b/exfat/libexfat/exfat.h @@ -3,7 +3,7 @@ Definitions of structures and constants used in exFAT file system implementation. - Copyright (C) 2010-2012 Andrew Nayenko + Copyright (C) 2010-2013 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 diff --git a/exfat/libexfat/exfatfs.h b/exfat/libexfat/exfatfs.h index 5a8e39fda..6c58a842a 100644 --- a/exfat/libexfat/exfatfs.h +++ b/exfat/libexfat/exfatfs.h @@ -2,7 +2,7 @@ exfatfs.h (29.08.09) Definitions of structures and constants used in exFAT file system. - Copyright (C) 2010-2012 Andrew Nayenko + Copyright (C) 2010-2013 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 diff --git a/exfat/libexfat/log.c b/exfat/libexfat/log.c index 8b589b406..034cc09f4 100644 --- a/exfat/libexfat/log.c +++ b/exfat/libexfat/log.c @@ -2,7 +2,7 @@ log.c (02.09.09) exFAT file system implementation library. - Copyright (C) 2010-2012 Andrew Nayenko + Copyright (C) 2010-2013 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 diff --git a/exfat/libexfat/lookup.c b/exfat/libexfat/lookup.c index 8c889b2b2..2e1aa8184 100644 --- a/exfat/libexfat/lookup.c +++ b/exfat/libexfat/lookup.c @@ -2,7 +2,7 @@ lookup.c (02.09.09) exFAT file system implementation library. - Copyright (C) 2010-2012 Andrew Nayenko + Copyright (C) 2010-2013 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 diff --git a/exfat/libexfat/mount.c b/exfat/libexfat/mount.c index 44fb58138..4daf12668 100644 --- a/exfat/libexfat/mount.c +++ b/exfat/libexfat/mount.c @@ -2,7 +2,7 @@ mount.c (22.10.09) exFAT file system implementation library. - Copyright (C) 2010-2012 Andrew Nayenko + Copyright (C) 2010-2013 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 diff --git a/exfat/libexfat/node.c b/exfat/libexfat/node.c index bacb01d10..ff2cea9ab 100644 --- a/exfat/libexfat/node.c +++ b/exfat/libexfat/node.c @@ -2,7 +2,7 @@ node.c (09.10.09) exFAT file system implementation library. - Copyright (C) 2010-2012 Andrew Nayenko + Copyright (C) 2010-2013 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 @@ -486,7 +486,7 @@ void exfat_reset_cache(struct exfat* ef) reset_cache(ef, ef->root); } -void next_entry(struct exfat* ef, const struct exfat_node* parent, +static void next_entry(struct exfat* ef, const struct exfat_node* parent, cluster_t* cluster, off64_t* offset) { *offset += sizeof(struct exfat_entry); @@ -908,6 +908,23 @@ int exfat_rename(struct exfat* ef, const char* old_path, const char* new_path) exfat_put_node(ef, node); return rc; } + + /* check that target is not a subdirectory of the source */ + if (node->flags & EXFAT_ATTRIB_DIR) + { + struct exfat_node* p; + + for (p = dir; p; p = p->parent) + if (node == p) + { + if (existing != NULL) + exfat_put_node(ef, existing); + exfat_put_node(ef, dir); + exfat_put_node(ef, node); + return -EINVAL; + } + } + if (existing != NULL) { /* remove target if it's not the same node as source */ diff --git a/exfat/libexfat/time.c b/exfat/libexfat/time.c index 890930eac..10a826a99 100644 --- a/exfat/libexfat/time.c +++ b/exfat/libexfat/time.c @@ -2,7 +2,7 @@ time.c (03.02.12) exFAT file system implementation library. - Copyright (C) 2010-2012 Andrew Nayenko + Copyright (C) 2010-2013 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 diff --git a/exfat/libexfat/utf.c b/exfat/libexfat/utf.c index 983c7930b..fd16fe964 100644 --- a/exfat/libexfat/utf.c +++ b/exfat/libexfat/utf.c @@ -2,7 +2,7 @@ utf.c (13.09.09) exFAT file system implementation library. - Copyright (C) 2010-2012 Andrew Nayenko + Copyright (C) 2010-2013 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 diff --git a/exfat/libexfat/utils.c b/exfat/libexfat/utils.c index 14b4791fe..499833b50 100644 --- a/exfat/libexfat/utils.c +++ b/exfat/libexfat/utils.c @@ -2,7 +2,7 @@ utils.c (04.09.09) exFAT file system implementation library. - Copyright (C) 2010-2012 Andrew Nayenko + Copyright (C) 2010-2013 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 diff --git a/exfat/libexfat/version.h b/exfat/libexfat/version.h index f35cb4fdf..b795e9159 100644 --- a/exfat/libexfat/version.h +++ b/exfat/libexfat/version.h @@ -2,7 +2,7 @@ version.h (12.06.10) Version constants. - Copyright (C) 2010-2012 Andrew Nayenko + Copyright (C) 2010-2013 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 @@ -21,8 +21,8 @@ #ifndef VERSION_H_INCLUDED #define VERSION_H_INCLUDED -#define EXFAT_VERSION_MAJOR 0 -#define EXFAT_VERSION_MINOR 9 -#define EXFAT_VERSION_PATCH 8 +#define EXFAT_VERSION_MAJOR 1 +#define EXFAT_VERSION_MINOR 0 +#define EXFAT_VERSION_PATCH 0 #endif /* ifndef VERSION_H_INCLUDED */ diff --git a/exfat/mkfs/cbm.c b/exfat/mkfs/cbm.c index 6d948b4cd..f255fb10a 100644 --- a/exfat/mkfs/cbm.c +++ b/exfat/mkfs/cbm.c @@ -2,7 +2,7 @@ cbm.c (09.11.10) Clusters Bitmap creation code. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 diff --git a/exfat/mkfs/cbm.h b/exfat/mkfs/cbm.h index 176504c0f..64883c730 100644 --- a/exfat/mkfs/cbm.h +++ b/exfat/mkfs/cbm.h @@ -2,7 +2,7 @@ cbm.h (09.11.10) Clusters Bitmap creation code. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 diff --git a/exfat/mkfs/fat.c b/exfat/mkfs/fat.c index 82feff8ba..158f59f6d 100644 --- a/exfat/mkfs/fat.c +++ b/exfat/mkfs/fat.c @@ -2,7 +2,7 @@ fat.c (09.11.10) File Allocation Table creation code. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 diff --git a/exfat/mkfs/fat.h b/exfat/mkfs/fat.h index 8d7b86c10..f7eb395cf 100644 --- a/exfat/mkfs/fat.h +++ b/exfat/mkfs/fat.h @@ -2,7 +2,7 @@ fat.h (09.11.10) File Allocation Table creation code. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 diff --git a/exfat/mkfs/main.c b/exfat/mkfs/main.c index 9feb750ee..97e465a5b 100644 --- a/exfat/mkfs/main.c +++ b/exfat/mkfs/main.c @@ -2,7 +2,7 @@ main.c (15.08.10) Creates exFAT file system. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 @@ -242,7 +242,7 @@ int main(int argc, char* argv[]) } else if (strcmp(*pp, "-v") == 0) { - puts("Copyright (C) 2011, 2012 Andrew Nayenko"); + puts("Copyright (C) 2011-2013 Andrew Nayenko"); return 0; } else if (spec == NULL) diff --git a/exfat/mkfs/mkexfat.c b/exfat/mkfs/mkexfat.c index 7018aaae2..aeb48a26c 100644 --- a/exfat/mkfs/mkexfat.c +++ b/exfat/mkfs/mkexfat.c @@ -2,7 +2,7 @@ mkexfat.c (22.04.12) FS creation engine. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 diff --git a/exfat/mkfs/mkexfat.h b/exfat/mkfs/mkexfat.h index 4634d0d95..47a13b00b 100644 --- a/exfat/mkfs/mkexfat.h +++ b/exfat/mkfs/mkexfat.h @@ -2,7 +2,7 @@ mkexfat.h (09.11.10) FS creation engine. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 diff --git a/exfat/mkfs/rootdir.c b/exfat/mkfs/rootdir.c index ddc476f4c..4890e120f 100644 --- a/exfat/mkfs/rootdir.c +++ b/exfat/mkfs/rootdir.c @@ -2,7 +2,7 @@ rootdir.c (09.11.10) Root directory creation code. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 diff --git a/exfat/mkfs/rootdir.h b/exfat/mkfs/rootdir.h index 64e533243..f3e7843ac 100644 --- a/exfat/mkfs/rootdir.h +++ b/exfat/mkfs/rootdir.h @@ -2,7 +2,7 @@ rootdir.h (09.11.10) Root directory creation code. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 diff --git a/exfat/mkfs/uct.c b/exfat/mkfs/uct.c index e6fd2c02e..1d22b095d 100644 --- a/exfat/mkfs/uct.c +++ b/exfat/mkfs/uct.c @@ -2,7 +2,7 @@ uct.c (09.11.10) Upper Case Table creation code. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 diff --git a/exfat/mkfs/uct.h b/exfat/mkfs/uct.h index 4b4f024cb..f726debb1 100644 --- a/exfat/mkfs/uct.h +++ b/exfat/mkfs/uct.h @@ -2,7 +2,7 @@ uct.h (09.11.10) Upper Case Table creation code. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 diff --git a/exfat/mkfs/uctc.c b/exfat/mkfs/uctc.c index 573981168..b4358d999 100644 --- a/exfat/mkfs/uctc.c +++ b/exfat/mkfs/uctc.c @@ -2,7 +2,7 @@ uctc.c (30.04.12) Upper Case Table contents. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 diff --git a/exfat/mkfs/uctc.h b/exfat/mkfs/uctc.h index 67d2bba6b..499a60ed1 100644 --- a/exfat/mkfs/uctc.h +++ b/exfat/mkfs/uctc.h @@ -2,7 +2,7 @@ uctc.h (30.10.10) Upper Case Table declaration. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 diff --git a/exfat/mkfs/vbr.c b/exfat/mkfs/vbr.c index 80e7a61e6..935c96bee 100644 --- a/exfat/mkfs/vbr.c +++ b/exfat/mkfs/vbr.c @@ -2,7 +2,7 @@ vbr.c (09.11.10) Volume Boot Record creation code. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 diff --git a/exfat/mkfs/vbr.h b/exfat/mkfs/vbr.h index c3a6362e0..738d8d763 100644 --- a/exfat/mkfs/vbr.h +++ b/exfat/mkfs/vbr.h @@ -2,7 +2,7 @@ vbr.h (09.11.10) Volume Boot Record creation code. - Copyright (C) 2011, 2012 Andrew Nayenko + Copyright (C) 2011-2013 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 diff --git a/exfat/node.c b/exfat/node.c deleted file mode 100644 index d5104038e..000000000 --- a/exfat/node.c +++ /dev/null @@ -1,1038 +0,0 @@ -/* - 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; -} |