Drop tmp pointer bd_inode because this is only used ones in fill_super.
Also we have so many initializing happening at the beginning that it is
already way too much to follow.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

We only use this in two places so we do not really need it. Also
wrapper sb_rdonly() is pretty self explanatory. This will make little
bit easier to read this super long variable list in the beginning of
ntfs_fill_super().
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Use sb instead of sbi->sb in fill_super. We have sb so why not use
it. Also makes code more readable.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Remove some unnecessary variable loading. These look like copy paste
work and they are not used to anything.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

In many places it is not needed to use goto out. We can just return
right away. This will make code little bit more cleaner as we won't
need to check error path.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Remove root drop when we fault out. This can never happened because
when we allocate root we eather fault when no root or success.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Change EINVAL to ENOMEM when d_make_root fails because that is right
errno.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Fix wrong error message $Logfile -> $UpCase. Probably copy paste.

Fixes: 203c2b3a406a ("fs/ntfs3: Add initialization of super block")
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

We can make code little bit more readable by using min/max macros.

These were found with Coccinelle.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

We can make code little more readable by using kernel macros clamp/max.

This were found with kernel included Coccinelle minmax script.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

We do not need this check as this is same thing as
NTFS_MIN_MFT_ZONE > zlen. We already check NTFS_MIN_MFT_ZONE <= zlen and
exit because is too big request. Remove it so code is cleaner.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

If ntfs_refresh_zone() returns error it will be changed to -ENOSPC. It
is not right. Also caller of this functions also check other errors.

Fixes: 78ab59fe ("fs/ntfs3: Rework file operations")
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Remove tabs before spaces from comment as recommended by kernel coding
style. Checkpatch also warn about these.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Remove braces from single statment block as they are not needed. Also
Linux kernel coding style guide recommend this and checkpatch warn about
this.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

For better code readability place constant always right side of the
test. This will also address checkpatch warning.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

No need for plus sign here. So remove it. Checkpatch will also be happy.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

We do not have any reason to keep old linear search in. Before this was
used for error path or if table was so big that it cannot be allocated.
Current binary search implementation won't need error path. Remove old
references to linear entry search.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

We could try to optimize algorithm to first fill just small table and
after that use bigger table all the way up to ARRAY_SIZE(offs). This
way we can use bigger search array, but not lose benefits with entry
count smaller < ARRAY_SIZE(offs).
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Current binary search allocates memory for table and fill whole table
before we start actual binary search. This is quite inefficient because
table fill will always be O(n). Also if table is huge we need to
reallocate memory which is costly.

This implementation use just stack memory and always when table is full
we will check if last element is <= and if not start table fill again.
The idea was that it would be same cost as table reallocation.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

We have lot of unnecessary headers in these files. Remove them so that
we help compiler a little bit.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

There is lot of headers which we do not need in this file. Delete them
and add what we really need. Here is list which identify why we need
this header.

<linux/kernel.h> // min()
<linux/slab.h> // kzalloc()
<linux/stddef.h> // offsetof()
<linux/string.h> // memcpy(), memset()
<linux/types.h> // u8, size_t, etc.

"debug.h" // PtrOffset()
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

There is no headers. They will be included through ntfs_fs.c, but that
is not right thing to do. Let's include headers what this file need
straight away.

types.h is needed for __le16, u8 etc.
kernel.h is needed for le16_to_cpu()
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

We only need linux/types.h for types like u8 etc. So we can remove rest
and help compiler a little bit.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

size_t needs header. Add missing header guards so that compiler will
only include these ones.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

We do not have headers at all in this file. We should have them so that
not every .c file needs to include all of the stuff which this file need
for building. This way we can remove some headers from other files and
get better picture what is needed. This can save some compilation time.
And this can help if we sometimes want to separate this one big header.

Also use forward declarations for structs and enums when it not included
straight with include and it is used in function declarations input.
This will prevent possible compiler warning:
  xxx declared inside parameter list will not be visible
  outside of this definition or declaration

Here is list which I made when parsing this. There is not necessarily
all example from this header file, but this just proofs we need it.

<linux/blkdev.h> SECTOR_SHIFT
<linux/buffer_head.h> sb_bread(), put_bh
<linux/cleancache.h> put_page()
<linux/fs.h> struct inode (Just struct ntfs_inode need it)
<linux/highmem.h> kunmap(), kmap()
<linux/kernel.h> cpu_to_leXX() ALIGN
<linux/mm.h> kvfree()
<linux/mutex.h> struct mutex, mutex_(un/try)lock()
<linux/page-flags.h> PageError()
<linux/pagemap.h> read_mapping_page()
<linux/rbtree.h> struct rb_root
<linux/rwsem.h> struct rw_semaphore
<linux/slab.h> krfree(), kzalloc()
<linux/string.h> memset()
<linux/time64.h> struct timespec64
<linux/types.h> uXX, __leXX
<linux/uidgid.h> kuid_t, kgid_t
<asm/div64.h> do_div()
<asm/page.h> PAGE_SIZE

"debug.h" ntfs_err() (Just one entry. Maybe we can drop this)
"ntfs.h" Do you even ask?
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

We do not have header files at all in this file. Add following headers
and there is also explanation which for it was added. Note that
explanation might not be complete, but it just proofs it is needed.

<linux/blkdev.h> // SECTOR_SHIFT
<linux/build_bug.h> // static_assert()
<linux/kernel.h> // cpu_to_le64, cpu_to_le32, ALIGN
<linux/stddef.h> // offsetof()
<linux/string.h> // memcmp()
<linux/types.h> //__le32, __le16

"debug.h" // PtrOffset(), Add2Ptr()
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Add forward declarations for structs so that we can include this file
without warnings even without linux/fs.h
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

The variable err is being initialized with a value that is never read, it
is being updated later on. The assignment is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Reviewed-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Show options should show option according documentation when some value
is not default or when ever coder wants. Uid/gid are problematic because
it is hard to know which are defaults. In file system there is many
different implementation for this problem.

Some file systems show uid/gid when they are different than root, some
when user has set them and some show them always. There is also problem
that what if root uid/gid change. This code just choose to show them
always. This way we do not need to think this any more.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Rename mount option no_acs_rules to (no)acsrules. This allow us to use
possibility to mount with options noaclrules or aclrules.
Acked-by: NChristian Brauner <christian.brauner@ubuntu.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Other fs drivers are using iocharset= mount option for specifying charset.
So add it also for ntfs3 and mark old nls= mount option as deprecated.
Reviewed-by: NPali Rohár <pali@kernel.org>
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

If we call Opt_nohidden with just keyword hidden, then we can use
hidden/nohidden when mounting. We already use this method for almoust
all other parameters so it is just logical that this will use same
method.
Acked-by: NChristian Brauner <christian.brauner@ubuntu.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NPali Rohár <pali@kernel.org>
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

init_fs_context() is meant to initialize s_fs_info (spi). Move spi
initializing code there which we can initialize before fill_super().
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

We have now new mount api as described in Documentation/filesystems. We
should use it as it gives us some benefits which are desribed here
lore.kernel.org/linux-fsdevel/159646178122.1784947.11705396571718464082.stgit@warthog.procyon.org.uk/

Nls loading is changed a to load with string. This did make code also
little cleaner.

Also try to use fsparam_flag_no as much as possible. This is just nice
little touch and is not mandatory but it should not make any harm. It
is just convenient that we can use example acl/noacl mount options.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Use pointer to mount options. We want to do this because we will use new
mount api which will benefit that we have spi and mount options in
different allocations. When we remount we do not have to make whole new
spi it is enough that we will allocate just mount options.

Please note that we can do example remount lot cleaner but things will
change in next patch so this should be just functional.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Remove unnecesarry remount flag handling. This does not do anything for
this driver. We have already set SB_NODIRATIME when we fill super. Also
noatime should be set from mount option. Now for some reson we try to
set it when remounting.

Lazytime part looks like it is copied from f2fs and there is own mount
parameter for it. That is why they use it. We do not set lazytime
anywhere in our code. So basically this just blocks lazytime when
remounting.
Acked-by: NChristian Brauner <christian.brauner@ubuntu.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Remove unnecesarry mount option noatime because this will be handled
by VFS. Our option parser will never get opt like this.
Acked-by: NChristian Brauner <christian.brauner@ubuntu.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NPali Rohár <pali@kernel.org>
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Usually in file system init() messages are only displayed in info level.
Change level from notice to info, but keep CONFIG_NTFS3_64BIT_CLUSTER in
notice level. Also this need even more attention so let's put big
warning here so that nobody will not try accidentally use it.

There is also no good reason to display internal stuff like binary tree
search. This is always on option which can only disabled for debugging
purposes by developer. Also this message does not even check if
developer has disabled it or not so it is useless info.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Files already have SDPX identifier so no reason to keep boilerplates in
these files anymore.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Acked-by: NEric Biggers <ebiggers@kernel.org>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

This check will be also performed in generic_file_read_iter() so we do
not want to check this two times in a row.

This was founded with Smatch
	fs/ntfs3/file.c:803 ntfs_file_read_iter()
	warn: unused return: count = iov_iter_count()
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>