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Smatch reported a possible buffer overflow in exfat_set_label but it
turns out that this code is unused so just guard the function with
'#ifndef __UBOOT__' as well as exfat_get_label that is also unused and
the helper static find_label.
Signed-off-by: Andrew Goodbody <[email protected]>
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In exfat_generic_pread and exfat_generic_pwrite offset is passed in as a
off_t type which is defined as 'unsigned long long' so there is no need
to create the variable uoffset as a uint64_t as this is just a direct
copy of offset. Also remove the impossible test of 'offset < 0' as this
is always false due to offset being unsigned.
This issue found by Smatch.
Signed-off-by: Andrew Goodbody <[email protected]>
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In the functions exfat_pread and exfat_pwrite there is a NULL check for
ctxt.cur_dev but this has already been derefenced twice before this
happens.
Refactor the code a bit to put the NULL check first.
This issue found by Smatch.
Signed-off-by: Andrew Goodbody <[email protected]>
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Make sure unused exfat_humanize_bytes() and exfat_print_info()
functions are not compiled into U-Boot code base. This also removes
CID 550300: Integer handling issues (INTEGER_OVERFLOW)
in exfat_humanize_bytes() , which is now surely unreachable.
Signed-off-by: Marek Vasut <[email protected]>
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In case the filename is too long, longer than PATH_MAX - 1, it
would overflow dirs->dirname array. Add missing check and also
use strncpy() to prevent the overflow in any case.
Fixes CID 550305: Security best practices violations (STRING_OVERFLOW)
Signed-off-by: Marek Vasut <[email protected]>
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Implement exfat_fs_rename() to rename or move files. This is used
by the 'mv' generic FS interface command. The rename implementation
for other filesystems was added recently and was not part of exfat
porting layer due to merge issue, which made 'mv' command crash,
fix this by adding the missing implementation.
Fixes: b86a651b646c ("fs: exfat: Add U-Boot porting layer")
Signed-off-by: Marek Vasut <[email protected]>
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The exfat_fs_exists() should return 0 in case the path does not exist,
and 1 in case the path does exist. Fix the inverted return value. This
fixes 'test -e' command with exfat.
Fixes: b86a651b646c ("fs: exfat: Add U-Boot porting layer")
Signed-off-by: Marek Vasut <[email protected]>
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The exfat_fs_readdir() depends on state created in exfat_fs_opendir(),
but that state may be disrupted by fs_close() called by the FS layer
in fs_opendir(), because exfat porting layer unmounts the filesystem
in ->close() callback.
To avoid this disruption, avoid creating state in exfat_fs_opendir(),
cache only the directory name to list there, and rework exfat_fs_readdir()
to work in a similar way to exfat_fs_ls(). That is, make exfat_fs_readdir()
open the directory, look up specific entry, extract its properties to be
reported to FS layer, and close the directory. This is slow, but avoids
the disruption. The slowness does not affect regular 'ls' command, which
uses exfat_fs_ls() fast path.
Fixes: b86a651b646c ("fs: exfat: Add U-Boot porting layer")
Signed-off-by: Marek Vasut <[email protected]>
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Write into a bogus file, like '/.', triggers an "impossible"
print from the exfat core code. That should not be printed
in U-Boot, because U-Boot prints its own error message sooner.
Inhibit this error message.
The following command triggers the bogus print:
"
=> save host 0:0 1000008 /. 0x10
"
Fixes: b86a651b646c ("fs: exfat: Add U-Boot porting layer")
Signed-off-by: Marek Vasut <[email protected]>
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Make sure the node is never dirty before being released, flush
the node first using exfat_flush_node() and only then release
the node using exfat_put_node(). This now matches the behavior
of exfat_fs_write() too.
Fixes: b86a651b646c ("fs: exfat: Add U-Boot porting layer")
Signed-off-by: Marek Vasut <[email protected]>
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Demote "exFAT file system is not found" message to debug(). This is
printed when U-Boot attempts to auto-detect the filesystem via generic
filesystem API by attempting to mount the device, and fails to do so
because there is another filesystem in place. The libexfat-fuse code
prints this an error, which interferes with 'test_gpt' test. Demote
the message to debug().
Reviewed-by: Tom Rini <[email protected]>
Signed-off-by: Marek Vasut <[email protected]>
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Fix the following conversion overflow errors. The UTF8-to-UTF16
conversion is done through 32bit wchar_t, but U-Boot codebase is
built with -fshort-wchar which limits wchar_t to 16bit. Replace
the built-in wchar_t with u32 to assure the intermediate type is
32bit.
"
fs/exfat/utf.c: In function ‘utf8_to_wchar’:
fs/exfat/utf.c:165:23: warning: overflow in conversion from ‘int’ to ‘wchar_t’ {aka ‘short unsigned int’} changes value from ‘(int)(short unsigned int)*input << 18 & 1835008’ to ‘0’ [-Woverflow]
165 | *wc = ((wchar_t) input[0] & 0x07) << 18;
| ^
fs/exfat/utf.c:170:23: warning: overflow in conversion from ‘int’ to ‘wchar_t’ {aka ‘short unsigned int’} changes value from ‘(int)(short unsigned int)*input << 24 & 50331648’ to ‘0’ [-Woverflow]
170 | *wc = ((wchar_t) input[0] & 0x03) << 24;
| ^
fs/exfat/utf.c:175:23: warning: overflow in conversion from ‘int’ to ‘wchar_t’ {aka ‘short unsigned int’} changes value from ‘(int)(short unsigned int)*input << 30 & 1073741824’ to ‘0’ [-Woverflow]
175 | *wc = ((wchar_t) input[0] & 0x01) << 30;
| ^
"
Signed-off-by: Marek Vasut <[email protected]>
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Add U-Boot adjustments to the libexfat code and integrate
the result into U-Boot filesystem layer. This provides full
read-write exfat support for U-Boot available via generic
filesystem interface.
FS_DIRENT_NAME_LEN is increased to 1024 in case exfat is
enabled, because EXFAT can use UTF16 names, which do not
fit into current FS_DIRENT_NAME_LEN. To avoid affecting
every configuration, increase FS_DIRENT_NAME_LEN only in
case EXFAT is enabled.
Example usage via sandbox, assuming disk.img with one exfat partition:
Drive info:
$ ./u-boot -Tc 'host bind 0 ../disk.img ; host info 0'
dev blocks blksz label path
0 262144 512 0 ../disk.img
List files:
$ ./u-boot -Tc 'host bind 0 ../disk.img ; ls host 0:1 /api'
475 Kconfig
230 Makefile
1873 README
...
10 file(s), 0 dir(s)
Load and checksum a file:
$ ./u-boot -Tc 'host bind 0 ../disk.img ; load host 0:1 $loadaddr .config ; \
crc32 $loadaddr $filesize'
56724 bytes read in 1 ms (54.1 MiB/s)
crc32 for 00000000 ... 0000dd93 ==> b2e847c9
$ crc32 .config
b2e847c9
Load .config file to RAM, store the file into FS as /newconfig,
load the /newconfig into RAM and checksum the file:
$ ./u-boot -Tc 'host bind 0 ../disk.img ; load host 0:1 $loadaddr .config ; \
save host 0:1 $loadaddr /newconfig $filesize ; \
load host 0:1 0x10000 /newconfig ; \
crc32 0x10000 $filesize'
56724 bytes read in 1 ms (54.1 MiB/s)
56724 bytes written in 0 ms
56724 bytes read in 0 ms
crc32 for 00010000 ... 0001dd93 ==> b2e847c9
Remove file 3.txt and create new directory /newdir:
$ ./u-boot -Tc 'host bind 0 ../disk.img ; ls host 0:1 / ; \
rm host 0:1 3.txt ; mkdir host 0:1 /newdir ; \
ls host 0:1 /'
...
0 1.txt
0 2.txt
0 3.txt
0 4.txt
0 5.txt
7 file(s), 4 dir(s)
...
0 1.txt
0 2.txt
newdir/
0 4.txt
0 5.txt
6 file(s), 5 dir(s)
Acked-by: Tom Rini <[email protected]>
Signed-off-by: Marek Vasut <[email protected]>
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Import most of libexfat from [1] except for log.c verbatim. The code
does not even compile and further adjustments and integration into
U-Boot filesystem code is in the next patch.
[1] https://github.com/relan/exfat
0b41c6d3560d ("CI: bump FreeBSD to 13.1.")
Acked-by: Tom Rini <[email protected]>
Signed-off-by: Marek Vasut <[email protected]>
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