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Refactor the dirty flag handling a little bit so an inline
function is called instead of directly stuffing a value into
the variable.
This allows variable that holds the flag to be completely removed
if its not used i.e. CONFIG_FAT_WIRTE=n
Signed-off-by: Daniel Palmer <[email protected]>
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This file does not need <asm/cache.h> so remove it. However the file
common/spl/spl_fat.c does need it, so add it there.
Signed-off-by: Tom Rini <[email protected]>
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The implementation roughly follows the POSIX specification for
rename() [1]. The ordering of operations attempting to minimize the chance
for data loss in unexpected circumstances.
The 'mv' command was implemented as a front end for the rename operation
as that is what most users are likely familiar with in terms of behavior.
The 'FAT_RENAME' Kconfig option was added to prevent code size increase on
size-oriented builds like SPL.
[1] https://pubs.opengroup.org/onlinepubs/9799919799/functions/rename.html
Signed-off-by: Gabriel Dalimonte <[email protected]>
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This fixes an issue where the FAT type (FAT12, FAT16) is not
correctly detected, e.g. when the BPB field BS_FilSysType contains the
valid value "FAT ".
According to the FAT spec the field BS_FilSysType has only
informational character and does not determine the FAT type.
The logic of this code is based on the linux kernel implementation
from the file fs/fat/inode.c function fat_fill_super().
For details about FAT see http://elm-chan.org/docs/fat_e.html
Signed-off-by: Christian Taedcke <[email protected]>
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UEFI applications call file system functions to determine if a file exists.
The return codes are evaluated to show appropriate messages.
U-Boot's file system layer should not interfere with the output.
Rename file_fat_read_at() to fat_read_file() adjusting the parameter
sequence and names and eliminate the old wrapper function.
Signed-off-by: Heinrich Schuchardt <[email protected]>
Reviewed-by: Tom Rini <[email protected]>
Reviewed-by: Ilias Apalodimas <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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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 <[email protected]>
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Move this uncommon header out of the common header.
Signed-off-by: Simon Glass <[email protected]>
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We should not be using typedefs and these make it harder to use
forward declarations (to reduce header file inclusions). Drop the typedef.
Signed-off-by: Simon Glass <[email protected]>
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In this patch, unlink support is added to FAT file system.
A directory can be deleted only if it is empty.
In this implementation, only a directory entry for a short file name
will be removed. So entries for a long file name can and should be
reclaimed with fsck.
Signed-off-by: AKASHI Takahiro <[email protected]>
Signed-off-by: Alexander Graf <[email protected]>
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In this patch, mkdir support is added to FAT file system.
A newly created directory contains only "." and ".." entries.
Signed-off-by: AKASHI Takahiro <[email protected]>
Signed-off-by: Alexander Graf <[email protected]>
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get_fs_info() was introduced in major re-work of read operation by Rob.
We want to reuse this function in write operation by extending it with
additional members in fsdata structure.
Signed-off-by: AKASHI Takahiro <[email protected]>
Signed-off-by: Alexander Graf <[email protected]>
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After the commit 265edc03d5a1 ("fs/fat: Clean up open-coded sector
<-> cluster conversions"), it is hung up writing new file to FAT16
disk with more than 19 files in armv7. It is because result value
of sect_to_cluster() is not proper by casting from signed value to
unsigned value. Fix the wrong casting of sect_to_cluster().
Reported-by: Jaehoon Chung <[email protected]>
Signed-off-by: Seung-Woo Kim <[email protected]>
Reviewed-by: Lukasz Majewski <[email protected]>
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When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from. So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry. Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.
In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.
This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents. There's also a few places where I found we did not have a tag
and have introduced one.
Signed-off-by: Tom Rini <[email protected]>
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fat.h unconditionally defines CONFIG_SUPPORT_VFAT (and has done since
2003), so as a result VFAT support is always enabled regardless of
whether a board config defines it or not. Drop this unnecessary option.
Signed-off-by: Tuomas Tynkkynen <[email protected]>
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Use the clust_to_sect() helper that was introduced earlier, and add an
inverse sect_to_clust(), plus update the various spots that open-coded
this conversion previously.
Signed-off-by: Rob Clark <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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Noticed when comparing our output to linux. There are some lcase bits
which control whether filename and/or extension should be downcase'd.
Signed-off-by: Rob Clark <[email protected]>
Reviewed-by: Łukasz Majewski <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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Add a generic implementation of 'ls' using opendir/readdir/closedir, and
replace fat's custom implementation. Other filesystems should move to
the generic implementation after they add opendir/readdir/closedir
support.
Signed-off-by: Rob Clark <[email protected]>
Reviewed-by: Łukasz Majewski <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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Spotted by chance, when trying to remove file_fat_ls(), I noticed there
were some dead users of the API.
Signed-off-by: Rob Clark <[email protected]>
Acked-by: Stefan Brüns <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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And drop a whole lot of ugly code!
Signed-off-by: Rob Clark <[email protected]>
Reviewed-by: Łukasz Majewski <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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Untangle directory traversal into a simple iterator, to replace the
existing multi-purpose do_fat_read_at() + get_dentfromdir().
Signed-off-by: Rob Clark <[email protected]>
Reviewed-by: Łukasz Majewski <[email protected]>
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Want to re-use this in fat dirent iterator in next patch.
Signed-off-by: Rob Clark <[email protected]>
Reviewed-by: Łukasz Majewski <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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Now that these symbols are in Kconfig, migrate all users. Use imply on
a number of platforms that default to having this enabled. As part of
this we must migrate some straglers for CMD_FAT and DOS_PARTITION.
Signed-off-by: Tom Rini <[email protected]>
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fill_dir_slot use get_contents_vfatname_block as a temporary buffer for
constructing a list of dir_slot entries. To save the memory and providing
correct type of memory for above usage, a local buffer with accurate size
declaration is introduced.
The local array size 640 is used because for long file name entry,
each entry use 32 bytes, one entry can store up to 13 characters.
The maximum number of entry possible is 20. So, total size is
32*20=640bytes.
Signed-off-by: Genevieve Chan <[email protected]>
Signed-off-by: Tien Fong Chee <[email protected]>
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The code caches 6 sectors of the FAT. On FAT traversal, the old contents
needs to be flushed to disk, but only if any FAT entries had been modified.
Explicitly flag the buffer on modification.
Currently, creating a new file traverses the whole FAT up to the first
free cluster and rewrites the on-disk blocks.
Signed-off-by: Stefan Brüns <[email protected]>
Reviewed-by: Lukasz Majewski <[email protected]>
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Use 'struct' instead of a typdef. Also since 'struct block_dev_desc' is long
and causes 80-column violations, rename it to struct blk_desc.
Signed-off-by: Simon Glass <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Tested-by: Stephen Warren <[email protected]>
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The sandbox/ext4/fat/generic fs commands do not gracefully deal with files
greater than 2GB. Negative values are returned in such cases.
To handle this, the fs functions have been modified to take an additional
parameter of type "* loff_t" which is then populated. The return value
of the fs functions are used only for error conditions.
Signed-off-by: Suriyan Ramasami <[email protected]>
Acked-by: Simon Glass <[email protected]>
[trini: Update board/gdsys/p1022/controlcenterd-id.c,
drivers/fpga/zynqpl.c for changes]
Signed-off-by: Tom Rini <[email protected]>
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Change the internal FAT functions to use loff_t for offsets.
Signed-off-by: Suriyan Ramasami <[email protected]>
Acked-by: Simon Glass <[email protected]>
[trini: Fix fs/fat/fat.c for min3 updates]
Signed-off-by: Tom Rini <[email protected]>
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These commands may be used to determine the size of a file without
actually reading the whole file content into memory. This may be used
to determine if the file will fit into the memory buffer that will
contain it. In particular, the DFU code will use it for this purpose
in the next commit.
Signed-off-by: Stephen Warren <[email protected]>
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Define the MAX_CLUSTSIZE to default of 65536 only if
CONFIG_FS_FAT_MAX_CLUSTSIZE is not defined.
This option has been provided to save memory in some
memory constrained cases.
Signed-off-by: Siva Durga Prasad Paladugu <[email protected]>
Acked-by: Michal Simek <[email protected]>
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In fat_write.c, the last clust condition check is incorrect:
if ((curclust >= 0xffffff8) || (curclust >= 0xfff8)) {
... ...
}
For example, in FAT32 if curclust is 0x11000. It is a valid clust.
But on above condition check, it will be think as a last clust.
So the correct last clust check should be:
in fat32, curclust >= 0xffffff8
in fat16, curclust >= 0xfff8
in fat12, curclust >= 0xff8
This patch correct the last clust check.
Signed-off-by: Josh Wu <[email protected]>
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Signed-off-by: Josh Wu <[email protected]>
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This hooks into the generic "file exists" support added in an earlier
patch, and provides an implementation for the FAT filesystem.
Signed-off-by: Stephen Warren <[email protected]>
Acked-by: Simon Glass <[email protected]>
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Signed-off-by: Wolfgang Denk <[email protected]>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <[email protected]>
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It doesn't make a lot of sense to have these methods in fs.c. They are
filesystem-specific, not generic code. Add each to the relevant
filesystem and remove the associated #ifdefs in fs.c.
Signed-off-by: Simon Glass <[email protected]>
Reviewed-by: Tom Rini <[email protected]>
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toupper/tolower function are already declared, so use them.
Signed-off-by: Richard Genoud <[email protected]>
Acked-by: Marek Vasut <[email protected]>
Acked-by: Stefano Babic <[email protected]>
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This makes the FAT filesystem API more consistent with other block-based
filesystems. If in the future standard multi-filesystem commands such as
"ls" or "load" are implemented, having FAT work the same way as other
filesystems will be necessary.
Convert cmd_fat.c to the new API, so the code looks more like other files
implementing the same commands for other filesystems.
Signed-off-by: Stephen Warren <[email protected]>
Reviewed-by: Benoît Thébaudeau <[email protected]>
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When storage devices contain files larger than the embedded RAM, it is
useful to be able to read these files by chunks, e.g. for a software
update to the embedded NAND Flash from an external storage device (USB
stick, SD card, etc.).
Hence, this patch makes it possible by adding a new FAT API to read
files from a given position. This patch also adds this feature to the
fatload command.
Signed-off-by: Benoît Thébaudeau <[email protected]>
Cc: Wolfgang Denk <[email protected]>
Signed-off-by: Tom Rini <[email protected]>
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This patch fixes several issues where sector offsets can overflow due
to being limited to 16-bits. The cases where an overflow can happen
when accessing large FAT32 partitions are:
- length of FAT in sectors
- start sector of root directory
- the sector of the first cluster
These issues were observed when reading files from a 64GB FAT32
filesystem.
Signed-off-by: Aaron Williams <[email protected]>
Tested-by: Anatolij Gustschin <[email protected]>
Signed-off-by: Anatolij Gustschin <[email protected]>
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In some cases, saving data in RAM as a file with FAT format is required.
This patch allows the file to be written in FAT formatted partition.
The usage is similar with reading a file.
First, fat_register_device function is called before file_fat_write function
in order to set target partition.
Then, file_fat_write function is invoked with desired file name,
start ram address for writing data, and file size.
Signed-off-by: Donggeun Kim <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
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Currently in do_fat_read() when reading FAT sectors, we have to divide down
LINEAR_PREFETCH_SIZE by the sector size, whereas it's defined as 2 sectors
worth of bytes. In order to avoid redundant multiplication/division, introduce
#define PREFETCH_BLOCKS instead of #define LINEAR_PREFETCH_SIZE.
Signed-off-by: Sergei Shtylyov <[email protected]>
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Apple iPod nanos have sector sizes of 2 or 4 KiB, which crashes U-Boot when it
tries to read the boot sector into 512-byte buffer situated on stack. Make the
FAT code indifferent to the sector size.
Signed-off-by: Sergei Shtylyov <[email protected]>
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The U-Boot code has the following bugs related to the processing of Long File
Name (LFN) entries scattered across several clusters/sectors :
1) get_vfatname() function is designed to gather scattered LFN entries by
cluster chain processing - that doesn't work for FAT12/16 root directory.
In other words, the function expects the following input data:
1.1) FAT32 directory (which is cluster chain based);
OR
1.2) FAT12/16 non-root directory (which is also cluster chain based);
OR
1.3) FAT12/16 root directory (allocated as contiguous sectors area), but
all necessary information MUST be within the input buffer of filesystem cluster
size (thus cluster-chain jump is never initiated).
In order to accomplish the last condition, root directory parsing code in
do_fat_read() uses the following trick: read-out cluster-size block, process
only first sector (512 bytes), then shift 512 forward, read-out cluster-size
block and so on. This works great unless cluster size is equal to 512 bytes
(in a case you have a small partition), or long file name entries are scattered
across three sectors, see 4) for details.
2) Despite of the fact that get_vfatname() supports FAT32 root directory
browsing, do_fat_read() function doesn't send current cluster number correctly,
so root directory look-up doesn't work correctly.
3) get_vfatname() doesn't gather scattered entries correctly also is the case
when all LFN entries are located at the end of the source cluster, but real
directory entry (which must be returned) is at the only beginning of the
next one. No error detected, the resulting directory entry returned contains
a semi-random information (wrong size, wrong start cluster number and so on)
i.e. the entry is not accessible.
4) LFN (VFAT) allows up to 20 entries (slots) each containing 26 bytes (13
UTF-16 code units) to represent a single long file name i.e. up to 520 bytes.
U-Boot allocates 256 bytes buffer instead, i.e. 10 or more LFN slots record
may cause buffer overflow / memory corruption.
Also, it's worth to mention that 20+1 slots occupy 672 bytes space which may
take more than one cluster of 512 bytes (medium-size FAT32 or small FAT16
partition) - get_vfatname() function doesn't support such case as well.
The patch attached fixes these problems in the following way:
- keep using 256 bytes buffer for a long file name, but safely prevent a
possible buffer overflow (skip LFN processing, if it contains 10 or more
slots).
- explicitly specify FAT12/16 root directory parsing buffer size, instead
of relying on cluster size. The value used is a double sector size (to store
current sector and the next one). This fixes the first problem and increases
performance on big FAT12/16 partitions;
- send current cluster number (FAT32) to get_vfatname() during root
directory processing;
- use LFN counter to seek the real directory entry in get_vfatname() - fixes the
third problem;
- skip deleted entries in the root directory (to prevent bogus buffer
overflow detection and LFN counter steps).
Note: it's not advised to split up the patch, because a separate part may
operate incorrectly.
Signed-off-by: Mikhail Zolotaryov <[email protected]>
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- reformat
- throw out macros like FAT_DPRINT and FAT_DPRINT
- remove dead code
Signed-off-by: Wolfgang Denk <[email protected]>
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This code contains some non-ascii characters in comment lines and code.
Most editors do not display those characters properly and editing those
files results always in diffs at these places which are usually not required
to be changed at all. This is error prone.
So, remove those weird characters and replace them by normal C-style
equivalents for which the proper defines were already in the header.
Signed-off-by: Remy Bohmer <[email protected]>
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This commit gets rid of a huge amount of silly white-space issues.
Especially, all sequences of SPACEs followed by TAB characters get
removed (unless they appear in print statements).
Also remove all embedded "vim:" and "vi:" statements which hide
indentation problems.
Signed-off-by: Wolfgang Denk <[email protected]>
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This fixes the cluster size tests in the FAT32 file system.
The current implementation of VFAT support doesn't work if the
referred cluster has an offset > 16bit representation, causing
"fatload" and "fatls" commands etc. to fail.
Signed-off-by: michael trimarchi <[email protected]>
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Patch by Joachim Jaeger, 18 Nov 2005
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