This adds a filesystem which is backed by the host's filesystem. It is
modeled off of sandboxfs, which has very similar aims. Semihosting
doesn't support listing directories (except with SYS_SYSTEM), so neither
do we. it's possible to optimize a bit for the common case of reading a
whole file by omitting a call to smh_seek, but this is left as a future
optimization.
Signed-off-by: Sean Anderson <sean.anderson@seco.com>
[BUG]
When passing a btrfs with NO_HOLE feature to U-boot, and if one file
contains holes, then the hash of the file is not correct in U-boot:
# mkfs.btrfs -f test.img # Since v5.15, mkfs defaults to NO_HOLES
# mount test.img /mnt/btrfs
# xfs_io -f -c "pwrite 0 4k" -c "pwrite 8k 4k" /mnt/btrfs/file
# md5sum /mnt/btrfs/file
277f3840b275c74d01e979ea9d75ac19 /mnt/btrfs/file
# umount /mnt/btrfs
# ./u-boot
=> host bind 0 /home/adam/test.img
=> ls host 0
< > 12288 Mon Dec 27 05:35:23 2021 file
=> load host 0 0x1000000 file
12288 bytes read in 0 ms
=> md5sum 0x1000000 0x3000
md5 for 01000000 ... 01002fff ==> 855ffdbe4d0ccc5acab92e1b5330e4c1
The md5sum doesn't match at all.
[CAUSE]
In U-boot btrfs implementation, the function btrfs_read_file() has the
following iteration for file extent iteration:
/* Read the aligned part */
while (cur < aligned_end) {
ret = lookup_data_extent(root, &path, ino, cur, &next_offset);
if (ret < 0)
goto out;
if (ret > 0) {
/* No next, direct exit */
if (!next_offset) {
ret = 0;
goto out;
}
}
/* Read file extent */
But for NO_HOLES features, hole extents will not have any extent item
for it.
Thus if @cur is at a hole, lookup_data_extent() will just return >0, and
update @next_offset.
But we still believe there is some data to read for @cur for ret > 0
case, causing we read extent data from the next file extent.
This means, what we do for above NO_HOLES btrfs is:
- Read 4K data from disk to file offset [0, 4K)
So far the data is still correct
- Read 4K data from disk to file offset [4K, 8K)
We didn't skip the 4K hole, but read the data at file offset [8K, 12K)
into file offset [4K, 8K).
This causes the checksum mismatch.
[FIX]
Add extra check to skip to the next non-hole range after
lookup_data_extent().
Signed-off-by: Qu Wenruo <wqu@suse.com>
This converts the following to Kconfig:
CONFIG_JFFS2_DEV
CONFIG_JFFS2_LZO
CONFIG_JFFS2_NAND
CONFIG_JFFS2_PART_OFFSET
CONFIG_JFFS2_PART_SIZE
Signed-off-by: Tom Rini <trini@konsulko.com>
For the symbols which are both hard-coded as enabled and used, move to
Kconfig. The rest of the CONFIG_YAFFS namespace is unselected anywhere,
so we leave it as is.
Signed-off-by: Tom Rini <trini@konsulko.com>
The original purpose of mtd_erase_callback() in Linux at the time it was
imported to U-Boot, was to inform the caller that erasing is done (since
it was an asynchronous operation).
All supplied callback methods in U-Boot do nothing, but the
mtd_erase_callback() function was (until previous patch) grossly abused
in U-Boot's mtdpart implementation for completely different purpose.
Since we got rid of the abusement, remove the mtd_erase_callback()
function and the .callback member from struct erase_info entirely, in
order to avoid such problems in the future.
Signed-off-by: Marek Behún <marek.behun@nic.cz>
This patch optimizes the commit mentioned below by avoiding running
a set of commands which are useless in the case when
size < mydata->sect_size and sect_count would be 0.
Fixes: 5b3ddb17ba ("fs/fat/fat.c: Do not perform zero block reads if there are no blocks left")
Signed-off-by: Ricardo Salveti <ricardo@foundries.io>
Co-developed-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
We only include <linux/mtd/rawnand.h> in <nand.h> for the forward
declaration of struct nand_chip, so do that directly. Then, include
<linux/mtd/rawnand.h> where required directly.
Signed-off-by: Tom Rini <trini@konsulko.com>
Output like the following is quite irritating:
=> bootefi hello
Scanning disk mmc2.blk...
No valid Btrfs found
Bad magic number for SquashFS image.
** Unrecognized filesystem type **
Scanning disk mmc1.blk...
No valid Btrfs found
Bad magic number for SquashFS image.
** Unrecognized filesystem type **
Scanning disk mmc0.blk...
No valid Btrfs found
Bad magic number for SquashFS image.
** Unrecognized filesystem type **
Albeit a whole disk may be formatted with a filesystem in most cases
a partition table is used and the whole disk (partition number 0) doesn't
contain a filesytem. Some partitions may only contain a blob. Not seeing a
filesytem on the whole disk or on any partition is only worth a debug
message.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This message comes up a lot when scanning filesystems. It suggests to the
user that there is some sort of error, but in fact there is no reason to
expect that a particular partition has a sqfs filesystem. Other
filesystems don't print this error.
Turn it into a debug message.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
This message comes up a lot when scanning filesystems. It suggests to the
user that there is some sort of error, but in fact there is no reason to
expect that a particular partition has a btrfs filesystem. Other
filesystems don't print this error.
Turn it into a debug message.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Qu Wenruo <wqu@suse.com>
BTRFS volume consists of a number of subvolumes which can be mounted separately
from each other. The top-level subvolume always exists even if no subvolumes
were created manually. A subvolume can be denoted as the default subvolume i.e.
the subvolume which is mounted by default.
The default "default subvolume" is the top-level one, but this is far from the
common practices used in the wild. For instance, openSUSE provides an OS
snapshot/rollback feature based on BTRFS. To achieve this, the actual OS root
filesystem is located into a separate subvolume which is "default" but not
"top-level". That means that the /boot/dtb/ directory is also located inside
this default subvolume instead of top-level one.
However, the existing btrfs u-boot driver always uses the top-level subvolume
as the filesystem root. This behaviour 1) is inconsistent with
mount /dev/sda1 /target
command, which mount the default subvolume 2) leads to the issues when
/boot/dtb cannot be found properly (see the reference).
This patch uses the default subvolume as the filesystem root to overcome
mentioned issues.
Reference: https://bugzilla.suse.com/show_bug.cgi?id=1185656
Signed-off-by: Matwey V. Kornilov <matwey.kornilov@gmail.com>
Fixes: f06bfcf54d ("fs: btrfs: Crossport open_ctree_fs_info() from btrfs-progs")
Reviewed-by: Qu Wenruo <wqu@suse.com>
In SquashFS, the contents of a directory is stored by
squashfs_directory_entry structures which contain the file's name, inode
and position within the filesystem.
The inode number is not stored directly; instead each directory has one
or more headers which set a base inode number, and files store the
offset from that to the file's inode number.
In mksquashfs, each inode is allocated a number in the same order as
they are written to the directory table; thus the offset from the
header's base inode number to the file's inode number is usually
positive.
Hardlinks are simply stored with two directory entries referencing the
same file. This means the second entry will thus have an inode number
much lower than the surrounding files. Since the header's base inode
number comes from the first entry that uses the header, this delta will
usually be negative.
Previously, U-Boot's squashfs_directory_entry.inode_offset field was
declared as an unsigned value. Thus when a negative value was found, it
would either resolve to an invalid inode number or to that of an
unrelated file.
A squashfs image to test this can be created like so:
echo hi > sqfs_test_files/001-root-file
mkdir sqfs_test_files/002-subdir
touch sqfs_test_files/002-subdir/003-file
ln sqfs_test_files/{001-root-file,002-subdir/004-link}
mksquashfs sqfs_test_files/ test.sqfs -noappend
Note that squashfs sorts the files ASCIIbetacally, so we can use the
names to control the order they appear in. The ordering is important -
the first reference to the file must have a lower inode number than the
directory in which the second reference resides, and the second
reference cannot be the first file in the directory.
Listing this sample image in U-Boot results in:
=> sqfsls virtio 2 002-subdir
0 003-file
Inode not found.
0 004-link
Signed-off-by: Campbell Suter <campbell@snapit.group>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
It is a pain to have to specify the value 16 in each call. Add a new
hextoul() function and update the code to use it.
Add a proper comment to simple_strtoul() while we are here.
Signed-off-by: Simon Glass <sjg@chromium.org>
Since the ACPI-generation code makes use of UUIDs we typically need to
enabled UUID support for it to build. Add a new Kconfig condition.
Use it for BTRFS also.
Signed-off-by: Simon Glass <sjg@chromium.org>
When reading a directory in the UEFI file system we have to return file
attributes and timestamps. Copy this data to the directory entry structure.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
The fragmented files were not correctly read because of two issues:
- The squashfs_file_info struct has a field named 'comp', which tells if
the file's fragment is compressed or not. This field was always set to
'true' in sqfs_get_regfile_info and sqfs_get_lregfile_info. It should
actually take sqfs_frag_lookup's return value. This patch addresses
these two assignments.
- In sqfs_read, the fragments (compressed or not) were copied to the
output buffer through a for loop which was reading data at the wrong
offset. Replace these loops by equivalent calls to memcpy, with the
right parameters.
I tested this patch by comparing the MD5 checksum of a few fragmented
files with the respective md5sum output in sandbox, considering both
compressed and uncompressed fragments.
Signed-off-by: Joao Marcos Costa <jmcosta944@gmail.com>
Tested-by: Richard Genoud <richard.genoud@posteo.net>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
The superblock buffer must be cache aligned, since it might be used
in DMA context, allocate it using ALLOC_CACHE_ALIGN_BUFFER() just
like it was done in btrfs_read_superblock() and read_tree_node().
This fixes this output on boot and non-working btrfs on iMX53:
CACHE: Misaligned operation at range [ced299d0, ced2a9d0]
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Marek Behún <marek.behun@nic.cz>
Cc: Qu Wenruo <wqu@suse.com>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
When reading directories the UEFI sub-system must supply file attributes
and timestamps. These fields will have to be added to struct fs_dirent.
SquashFS should not fill these fields with random data. Ensure that they
are zeroed out.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
There are some cases where decompressed sectors can have padding zeros.
In kernel code, we have lines to address such situation:
/*
* btrfs_getblock is doing a zero on the tail of the page too,
* but this will cover anything missing from the decompressed
* data.
*/
if (bytes < destlen)
memset(kaddr+bytes, 0, destlen-bytes);
kunmap_local(kaddr);
But not in U-boot code, thus we have some reports of U-boot failed to
read compressed files in btrfs.
Fix it by doing the same thing of the kernel, for both inline and
regular compressed extents.
Reported-by: Matwey Kornilov <matwey.kornilov@gmail.com>
Link: https://bugzilla.suse.com/show_bug.cgi?id=1183717
Fixes: a26a6bedaf ("fs: btrfs: Introduce btrfs_read_extent_inline() and btrfs_read_extent_reg()")
Signed-off-by: Qu Wenruo <wqu@suse.com>
Up to now file_fat_detectfs() did not detect some interface types like
EFI, HOST, VIRTIO.
Avoid duplicate code by calling blk_get_if_type_name().
The interface type now will be shown in lower case to match all other use
cases.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
The function jffs2_1pass_read_inode() was discarding the summary
inodes and dirent because the value in datacrc flag wasn't
initialized in function jffs2_sum_process_sum_data().
This fix initializes the status of all summary records to indicate
that the CRC needs to be verified when they are loaded.
Before this fix, the behaviors produced by the undefined value of
datacrc was:
- Summary's registries were discarded when 'b->datacrc' is equal
as 'CRC_BAD'.
- Summary's registries were not checked when b->datacrc differs of
'CRC_BAD' and 'CRC_UNKNOWN'
So, almost all of the time the crc just isn't checked, and in some
cases the registries are discarded.
Signed-off-by: Wagner Popov dos Santos <wpopov@gmail.com>
Fixes address violation in functions read_nand_cached() and
read_onenand_cached(). This happens because these functions
try to read a fixed amount
of data even when the offset+length
is above the nand's limit.
Signed-off-by: Wagner Popov dos Santos <wpopov@gmail.com>
CBFS now supports compressed filed. Add support for reading this
information so that the correct decompression can be applied. The
decompression itself is not implemented in CBFS.
Signed-off-by: Simon Glass <sjg@chromium.org>
In file_cbfs_next_file() there is a lot of complicated code to move to
the next file. Use the ALIGN() macros to simplify this.
Signed-off-by: Simon Glass <sjg@chromium.org>
The file_cbfs_next_file() function is already fairly long. Before
expanding it further, move the core part into a separate function.
Signed-off-by: Simon Glass <sjg@chromium.org>
The file traversal functions currently use a single global CBFS. In some
cases we need to access multiple CBFSs to obtain different files. Add new
functions to support this.
Signed-off-by: Simon Glass <sjg@chromium.org>
In some cases CBFS does not start with a header but is just a collection
of files. It is possible to support this so long as the size of the CBFS
is provided.
Update the cbfs_init_mem() function to support this.
Signed-off-by: Simon Glass <sjg@chromium.org>
CBFS now supports attributes for things that cannot fit in the header as
originally conceived. Add the structures for these.
Also rename attributes_offset to something shorter, to ease code
readability.
Signed-off-by: Simon Glass <sjg@chromium.org>
Commit 401d1c4f5d ("common: Drop
asm/global_data.h from common header") broke compilation of squashfs
filesystem when CONFIG_CMD_SQUASHFS=y is enabled.
Compilation is failing on error:
aarch64-linux-gnu-ld.bfd: u-boot/fs/squashfs/sqfs_inode.c:121: undefined reference to `le32_to_cpu'
Fixes: 401d1c4f5d ("common: Drop asm/global_data.h from common header")
Suggested-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
When the btrfs_read_fs_root() function is searching a ROOT_ITEM with
location key offset other than -1, it currently fails via BUG_ON.
The offset can have other value than -1, though. This can happen for
example if a subvolume is renamed:
$ btrfs subvolume create X && sync
Create subvolume './X'
$ btrfs inspect-internal dump-tree /dev/root | grep -B 2 'name: X$
location key (270 ROOT_ITEM 18446744073709551615) type DIR
transid 283 data_len 0 name_len 1
name: X
$ mv X Y && sync
$ btrfs inspect-internal dump-tree /dev/root | grep -B 2 'name: Y$
location key (270 ROOT_ITEM 0) type DIR
transid 285 data_len 0 name_len 1
name: Y
As can be seen the offset changed from -1ULL to 0.
Do not fail in this case.
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Cc: David Sterba <dsterba@suse.com>
Cc: Qu Wenruo <wqu@suse.com>
Cc: Tom Rini <trini@konsulko.com>
Since commit 325dd1f642 ("fs: btrfs: Use btrfs_iter_dir() to ...")
when btrfs is listing a directory, the output is not aligned:
<SYMLINK> 15 Wed Sep 09 13:20:03 2020 boot.scr -> @/boot/boot.scr
<DIR> 0 Tue Feb 02 12:42:09 2021 @
<FILE> 108 Tue Feb 02 12:54:04 2021 1.info
Return back to how it was displayed previously, i.e.:
<SYM> 15 Wed Sep 09 13:20:03 2020 boot.scr -> @/boot/boot.scr
<DIR> 0 Tue Feb 02 12:42:09 2021 @
< > 108 Tue Feb 02 12:54:04 2021 1.info
Instead of '<FILE>', print '< >', as ext4 driver.
If an unknown directory item type is encountered, we will print the type
number left padded with spaces, enclosed by '?', instead of '<' and '>',
i.e.:
? 30? ............................. name
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Fixes: 325dd1f642 ("fs: btrfs: Use btrfs_iter_dir() to replace ...")
Cc: David Sterba <dsterba@suse.com>
Cc: Qu Wenruo <wqu@suse.com>
Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Skip xattrs in directory listing. U-Boot filesystem drivers do not list
xattrs.
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Cc: David Sterba <dsterba@suse.com>
Cc: Qu Wenruo <wqu@suse.com>
Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
sqfs_opendir() called in sqfs_size(), sqfs_read(), sqfs_exists() may fail
leading to sqfs_closedir(NULL) being called. Do not dereference NULL.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
The FAT32 File System Specification [1] requires leading and trailing
spaces as well as trailing periods of long names to be ignored.
[1]
Microsoft Extensible Firmware Initiative
FAT32 File System Specification
Version 1.03, December 6, 2000
Microsoft Corporation
https://www.win.tue.nl/~aeb/linux/fs/fat/fatgen103.pdf
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Directories or files called '.' or '..' cannot be created or written to
in any directory. Move the test to normalize_longname() to check this
early.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This patch involves no functional change. It is just about code
readability.
Both in file_fat_write_at() and fat_mkdir() the incoming file or directory
path are split into two parts: the parent directory and the base name.
In file_fat_write_at() the value of the variable basename is assigned to
the filename parameter and afterwards the variable filename is used instead
of basename. It is more readable to use the variable basename and leave
filename unchanged.
In fat_mkdir() the base name variable is called directory. This is
confusing. Call it basename like in file_fat_write_at(). This allows to
rename parameter new_directory to directory in the implementation of
fat_mkdir() to match the function declaration.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Move this out of the common header and include it only where needed. In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly. Finally, we have a few
cases where we did not need to include <asm/global_data.h> at all, so
remove that include.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
The load command should not silently return to the console prompt if an
invalid block device is specified and no file is loaded.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Since commit 565a4147d1 ("fs: btrfs: Add more checksum algorithms")
btrfs uses the sha256 checksum algorithm. But Kconfig lacks to select
it. This leads to compilation errors:
fs/built-in.o: In function `hash_sha256':
fs/btrfs/crypto/hash.c:25: undefined reference to `sha256_starts'
fs/btrfs/crypto/hash.c:26: undefined reference to `sha256_update'
fs/btrfs/crypto/hash.c:27: undefined reference to `sha256_finish'
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
When copying short name plus extension refer to the encapsulating structure
and not to the short name element.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
The short name and extension of FAT files are stored in adjacent fields of
the directory entry. For some operations like calculating a checksum or
copying both fields it is preferable to treat both as one structure.
Change the definition of the directory entry structure to include a
structure comprising the name and the extension field.
This resolves Coverity CID 316357, CID 316350, CID 316348.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Provide function description for flush_dir().
Move all error messages for flush_dir() from the callers to the function.
Move mapping of errors to -EIO to the function.
Always check return value of flush_dir() (Coverity CID 316362).
In fat_unlink() return -EIO if flush_dirty_fat_buffer() fails.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Before 'if (err)' we have to initialize the variable otherwise we use a
random value from the stack.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
At the beginning of close_ctree_fs_info() the value 0 is assigned to err
and never changed before testing it.
Let's get rid of the superfluous variable.
Fixes: f06bfcf54d ("fs: btrfs: Crossport open_ctree_fs_info() from btrfs-progs")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Qu Wenruo <wqu@suse.com>
SquashFS supports sprase blocks in files - that is, if a given block is
composed only of zeros, it's not written to the output file to save
space and it's on-disk length field is set to zero to indicate that.
Previously the squashfs driver did not recognise that, and would attempt
to read and decompress a zero-sized block, which obviously failed.
The following command may be used to create a file for testing:
cat <(dd if=/dev/urandom of=/dev/stdout bs=1M count=1) \
<(dd if=/dev/zero of=/dev/stdout bs=1M count=1) \
<(dd if=/dev/urandom of=/dev/stdout bs=1k count=200) >test_file
Signed-off-by: Campbell Suter <campbell@snapit.group>
In __btrfs_map_block() we do a int * int and assign it to u64.
This is not safe as the result (int * int) is still evaluated as (int)
thus it can overflow.
Convert one of the multiplier to u64 to prevent such problem.
In real world, this should not cause problem as we have device number
limit thus it won't go beyond 4G for a single stripe.
But it's harder to teach coverity about all these hidden limits, so just
fix the possible overflow.
Reported-by: Coverity CID 312957
Reported-by: Coverity CID 312948
Signed-off-by: Qu Wenruo <wqu@suse.com>
Up to now the bootefi command used the last file loaded to determine the
boot partition. This has led to errors when the fdt had been loaded from
another partition after the EFI binary.
Before setting the boot device from a loaded file check if it is a PE-COFF
image or a FIT image.
For a PE-COFF image remember address and size, boot device and path.
For a FIT image remember boot device and path.
If the PE-COFF image is overwritten by loading another file, forget it.
Do not allow to start an image via bootefi which is not the last loaded
PE-COFF image.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
The FAT file system does not have a UUID but a 4 byte volume ID.
Let the fsuuid command show it in XXXX-XXXX format.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
The FAT filesystem implementation uses several marcros referring to a magic
variable name mydata which renders the code less readable. Eliminate one of
them which is only used for a debug() statement.
Use log_debug() instead of debug().
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Long file names are stored in multiple directory entries. When deleting a
file we must delete all of them.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
A long name is split over multiple directory entries. When deleting a file
with a long name we need the first directory entry to be able to delete the
whole chain.
Add the necessary fields to the FAT iterator:
* cluster of first directory entry
* address of first directory entry
* remaining entries in cluster
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
When deleting a directory entry 0xe5 is written to name[0].
We have a constant for this value and should use it consistently.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Searching for a file is not a write operation. So it should not lead to the
allocation of a new cluster to the directory.
If we reuse deleted entries, we might not even use the new cluster and due
to not flushing it the directory could be corrupted.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
When creating new directory entries try to reuse entries marked as deleted.
In fill_dir_slot() do not allocate new clusters as this has already been
done in fat_find_empty_dentries().
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Provide a function to find a series of empty directory entries.
The current directory is scanned for deleted entries.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
When handling long file names directory entries may be split over multiple
clusters. We must make sure that new clusters are zero filled on disk.
When allocating a new cluster for a directory flush it.
The flushing should be executed before updating the FAT. This way if
flushing fails, we still have a valid directory structure.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
When iterating over a child directory we set itr->start_clust.
Do the same when over the root directory.
When looking for deleted directory entries or existing short names we will
have to iterate over directories a second and third time. With this patch
we do not need any special logic for the root directory.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
For reusing deleted directory entries we have to adjust the function called
to step to the next directory entry.
This patch alone is not enough to actually reuse deleted directory entries
as the fill_dir_slot() is still called with first never used directory
entry.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
File names must be unique within their directory. So before assigning a
short name we must check that it is unique.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
In set_name() we select the short name. Once this is correctly implemented
this will be a performance intensive operation because we need to check
that the name does not exist yet. So set_name should only be called once.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Currently we pass the short name via the directory iterator.
Pass it explicitly as a parameter.
This removes the requirement to set the short name in the iterator before
writing the long name.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
The current function set_name() used to create short names has the
following deficiencies resolved by this patch:
* Long names (e.g. FOO.TXT) are stored even if a short name is enough.
* Short names with spaces are created, e.g. "A ~1.TXT".
* Short names with illegal characters are created, e.g. "FOO++BAR".
* Debug output does not not consider that the short file name has no
concluding '\0'.
The solution for the following bug is split of into a separate patch:
* Short file names must be unique.
This patch only provides the loop over possible short file names.
Fixes: c30a15e590 ("FAT: Add FAT write feature")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Rename function next_cluster() to fat_next_cluster() and export it.
When creating a new directory entries we should reuse deleted entries.
This requires re-scanning the directory.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
The FAT specification [1] requires that for a '..' directory entry pointing
to the root directory the fields DIR_FstClusHi and DIR_FstClusLo are 0.
[1] Microsoft FAT Specification, Microsoft Corporation, August 30 2005
Fixes: 31a18d570d ("fs: fat: support mkdir")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Using constants instead of anonymous numbers increases code readability.
Fixes: 704df6aa0a ("fs: fat: refactor write interface for a file offset")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
0x05 is used as replacement letter for 0xe5 at the first position of short
file names. We must not skip over directory entries starting with 0x05.
Cf. Microsoft FAT Specification, August 30 2005
Fixes: 39606d462c ("fs: fat: handle deleted directory entries correctly")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
When trying to create a file in the full root directory of a FAT32
filesystem a NULL dereference can be observed.
When the root directory of a FAT16 filesystem is full fill_dir_slot() must
return -1 to signal that a new directory entry could not be allocated.
Fixes: cd2d727fff ("fs: fat: allocate a new cluster for root directory of fat32")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This permits to find a file and use the distro_bootcmd
Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
offset is the offset in the file read, not the offset in the destination
buffer.
If the offset is not null, this will lead to a memory corruption.
So, for now, we are returning an error if the offset is used.
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
sqfs_decompressor_init() returns a value, so it's better to use it than
to force the return value to EINVAL (it could be ENOMEM)
Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
Resetting the context on error will prevent some checks like:
if (!ctx.cur_dev)
To pass when the probe method has failed
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
If SquashFS magic number is invalid, there's a memory leak.
Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
finfo.blk_sizes may not be freed in case of error in the for loop
Setting it to null and freeing it at the end makes prevents that from
happening.
Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
if sqfs_tokenize(rel_tokens, rc, rel); fails, the function exits
without freeing the array base_tokens.
Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
the return value of sqfs_tokenize(rel_tokens, rc, rel); wasn't checked.
(but "ret" value was !)
This is obviouly a typo.
Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
sqfs_closedir() should be called to free memory allocated by
sqfs_opendir()
Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
