Move DeviceOpener class to a separate file.

It is used by several of the filesystems, so it seems a good idea to
move it to the shared/ directory.

UFS2, BFS, XFS, EXT2 and EXFAT are adjusted.

Change-Id: I493e37a1e7d3ae24251469f82befd985a3c1dbdd
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2489
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

file_systems: Pass size argument to ioctl in a lot more places.

exfat: checks cluster values.

also use the size of the node for Size(), instead of the valid size.

exfat: avoid overflow in Volume::ClusterToBlock().

exfat: Add missing locking around SplayTree lookup/insertion.

A lookup in a splay tree does move the looked up entry to the root of
the tree. This means the tree structure is modified on lookup alone.
Obviously the tree structure is also modified when inserting new nodes.

For both of these reasons access to the f{Node|Ino}Tree needs to be
locked on lookup and insert.

Fixes crashes when the tree is concurrently modified by multiple threads
accessing the same exfat volume.

In addition this protects the fNextId field that hands out new inode
ids.

exfat: handle 4-byte UTF-16 surrogate pairs

... in filenames. Replace the existing Unicode conversion functions
with UTF conversion functions from js that he relicensed MIT for us.

Put the UTF conversion functions in a private but shared code location
so that they can be accessed throughout the kernel.

Right now we only provide functions to convert between UTF-8 and UTF-16.
At some point we should also add functions to convert between UTF-8 and
UTF-32 and UTF-16 and UTF-32 but these aren't needed by exfat.

Remove the old Unicode conversion functions from exfat as they assumed
UCS-2 characters and don't work with UTF-16 used by exfat.

Rename most variables with the term length with code unit where code units
are intended. The term length, when used, means length in bytes while code
units represent either a full 2-byte UTF-16 character or half a 4-byte
surrogate pair.

exfat: style fix param/variable renaming

Pass the partition size into the default name, not the device size,
this makes the variable names match the comment.

There is no functional change here, the variable names got renamed
to make it more clear what's happening. We want show the partition
size, not the device size, and we want to error if the device size is less
than the partition size, not if the partition size is less than the device size.

exfat: recheck device size is big enough to hold fs

I didn't mean to omit this check, I just need to save deviceSize below for
get_default_volume_name() so that it will match the mount point name.

Checked to make sure the calculation works on a 2GiB, 32GiB, and 128GiB
(virtual) exfat volume.

exfat: fix problems with hrev46820

* Set the size of the volume name member var to B_FILE_NAME_LENGTH which is the
max width of a volume name according to the BeBook and the Support Kit code. We'll
deal with trying to stuff the volume name back into the exfat volume label later.
* Rename volume_name() to get_volume_name()
* Pass the name string length into get_volume_name() and use it to avoid buffer overrun.
* Fill name with a blank string if volume has no label.
* Don't memset the name with zeros before doing the conversion from Unicode to UTF-8,
the conversion function will make sure the result is NUL-terminated if it returns B_OK.
* Also check the return value of the Unicode conversion function and return an error if it fails.
* Add get_default_volume_name() method to Utility.cpp which is used to fill out the default
volume name in the case volume name is blank. e.g. 32GiB ExFAT Volume. This now
applies to both the volume name and mount point.
* Use non-metric prefixes for default volume name, e.g. MiB, GiB, TiB
* For an unset volume name fill the volume name with an empty string.
* Remove the leading underscore from _name and _partition parameters
* Replace size constants with sizeof() calls
* Remove Axel from the copyright statement in Utility.cpp, he had nothing to do with it,
add Jérôme (aka korli) because he wrote the code for get_default_volume_name()
(was in Volumes.cpp)
* Remove some trailing spaces from encodings.cpp

Thanks Axel.

Revert "exfat: limit backup volume name to 11 characters"

This reverts commit c79381d32a61a570bff305744b1230100c735e22.

exfat: Set the mountpoint to same as volume name

Fixes #10501

* update copyright headers, attribute to Haiku, Inc. add authors
* volume_name gets filled out by a utility function in Utility.cpp
* update exfat_entry
- rename name_label to just label
- adjust volume_label to have 11 uint16 chars plus 8 uint8 reserved
- add guid partition info
* Added a couple new entry type defines
* fName is 34 bytes long which fits the 11 3-byte UTF-8 chars and a \0

exfat: limit backup volume name to 11 characters

exfat: style fixes only

exfat: fixes 64 bit warnings

exfat: Return more than a single dirent at a time in exfat_read_dir().

* similar to what mmlr did in hrev45575 for bfs.
* DirectoryIterator could try to read past the end of the directory.
* replaced a dprintf with a TRACE() statement.

Fix typos: super block -> superblock (#8974)

Signed-off-by: Przemysław Buczkowski <przemub@yahoo.pl>
Signed-off-by: Matt Madia <mattmadia@gmail.com>

* takes into account volume label
* clean up
* directories don't seem to have a valid contiguous flag, fixes directories with many files.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40431 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented a read-only exFAT file system, tested with a 4GB image.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40409 a95241bf-73f2-0310-859d-f6bbb57e9c96

exfat: Add missing locking around SplayTree lookup/insertion.

A lookup in a splay tree does move the looked up entry to the root of
the tree. This means the tree structure is modified on lookup alone.
Obviously the tree structure is also modified when inserting new nodes.

For both of these reasons access to the f{Node|Ino}Tree needs to be
locked on lookup and insert.

Fixes crashes when the tree is concurrently modified by multiple threads
accessing the same exfat volume.

In addition this protects the fNextId field that hands out new inode
ids.

exfat: handle 4-byte UTF-16 surrogate pairs

... in filenames. Replace the existing Unicode conversion functions
with UTF conversion functions from js that he relicensed MIT for us.

Put the UTF conversion functions in a private but shared code location
so that they can be accessed throughout the kernel.

Right now we only provide functions to convert between UTF-8 and UTF-16.
At some point we should also add functions to convert between UTF-8 and
UTF-32 and UTF-16 and UTF-32 but these aren't needed by exfat.

Remove the old Unicode conversion functions from exfat as they assumed
UCS-2 characters and don't work with UTF-16 used by exfat.

Rename most variables with the term length with code unit where code units
are intended. The term length, when used, means length in bytes while code
units represent either a full 2-byte UTF-16 character or half a 4-byte
surrogate pair.

exfat: style fix param/variable renaming

Pass the partition size into the default name, not the device size,
this makes the variable names match the comment.

There is no functional change here, the variable names got renamed
to make it more clear what's happening. We want show the partition
size, not the device size, and we want to error if the device size is less
than the partition size, not if the partition size is less than the device size.

exfat: recheck device size is big enough to hold fs

I didn't mean to omit this check, I just need to save deviceSize below for
get_default_volume_name() so that it will match the mount point name.

Checked to make sure the calculation works on a 2GiB, 32GiB, and 128GiB
(virtual) exfat volume.

exfat: fix problems with hrev46820

* Set the size of the volume name member var to B_FILE_NAME_LENGTH which is the
max width of a volume name according to the BeBook and the Support Kit code. We'll
deal with trying to stuff the volume name back into the exfat volume label later.
* Rename volume_name() to get_volume_name()
* Pass the name string length into get_volume_name() and use it to avoid buffer overrun.
* Fill name with a blank string if volume has no label.
* Don't memset the name with zeros before doing the conversion from Unicode to UTF-8,
the conversion function will make sure the result is NUL-terminated if it returns B_OK.
* Also check the return value of the Unicode conversion function and return an error if it fails.
* Add get_default_volume_name() method to Utility.cpp which is used to fill out the default
volume name in the case volume name is blank. e.g. 32GiB ExFAT Volume. This now
applies to both the volume name and mount point.
* Use non-metric prefixes for default volume name, e.g. MiB, GiB, TiB
* For an unset volume name fill the volume name with an empty string.
* Remove the leading underscore from _name and _partition parameters
* Replace size constants with sizeof() calls
* Remove Axel from the copyright statement in Utility.cpp, he had nothing to do with it,
add Jérôme (aka korli) because he wrote the code for get_default_volume_name()
(was in Volumes.cpp)
* Remove some trailing spaces from encodings.cpp

Thanks Axel.

Revert "exfat: limit backup volume name to 11 characters"

This reverts commit c79381d32a61a570bff305744b1230100c735e22.

exfat: Set the mountpoint to same as volume name

Fixes #10501

* update copyright headers, attribute to Haiku, Inc. add authors
* volume_name gets filled out by a utility function in Utility.cpp
* update exfat_entry
- rename name_label to just label
- adjust volume_label to have 11 uint16 chars plus 8 uint8 reserved
- add guid partition info
* Added a couple new entry type defines
* fName is 34 bytes long which fits the 11 3-byte UTF-8 chars and a \0

exfat: limit backup volume name to 11 characters

exfat: style fixes only

exfat: fixes 64 bit warnings

exfat: Return more than a single dirent at a time in exfat_read_dir().

* similar to what mmlr did in hrev45575 for bfs.
* DirectoryIterator could try to read past the end of the directory.
* replaced a dprintf with a TRACE() statement.

Fix typos: super block -> superblock (#8974)

Signed-off-by: Przemysław Buczkowski <przemub@yahoo.pl>
Signed-off-by: Matt Madia <mattmadia@gmail.com>

* takes into account volume label
* clean up
* directories don't seem to have a valid contiguous flag, fixes directories with many files.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40431 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented a read-only exFAT file system, tested with a 4GB image.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40409 a95241bf-73f2-0310-859d-f6bbb57e9c96