48 lines
2.0 KiB
Plaintext
48 lines
2.0 KiB
Plaintext
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Licensing for the filesystem drivers is complex. Three different licenses
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apply to various parts of the code:
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* Christoph Pfisterer's original file system wrapper (FSW) code is covered
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by a BSD-style license. Many of the source files with names that take the
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form fsw_*.[ch] are so licensed, but this is NOT generally true of
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filesystem-specific files (e.g., fsw_ext2.c or fsw_btrfs.c).
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* Certain filesystem drivers are licensed under the GPLv2, either because
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they borrow code from the Linux kernel or because a developer (typically
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Oracle) applied the GPLv2 license to them. This is true of the ext2fs,
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ext4fs, ReiserFS, HFS+, and ISO-9660 drivers.
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* At least one filesystem driver (Btrfs) uses code taken from GRUB, and so
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uses the GPLv3 (or later) license.
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Note that the GPLv2 and GPLv3 are, ironically, not compatible licenses.
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Thus, code from GPLv2 and GPLv3 projects should not be mixed. The BSD
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license used by Pfisterer's original code is compatible with both versions
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of the GPL, so the fact that both GPLv2 and GPLv3 drivers is built upon it
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is OK. If you intend to contribute to this project's drivers or use the
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code yourself, please keep this fact in mind.
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The below was written by Christoph Pfisterer with respect to his original
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code:
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File System Wrapper License
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=============================
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The various parts of the File System Wrapper source code come from
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different sources and may carry different licenses. Here's a quick
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account of the situation:
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* The core code was written from scratch and is covered by a
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BSD-style license.
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* The EFI host driver was written from scratch, possibly using code
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from the TianoCore project and Intel's EFI Application Toolkit. It
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is covered by a BSD-style license.
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* The ext2 and reiserfs file system drivers use definitions from the
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Linux kernel source. The actual code was written from scratch,
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using multiple sources for reference. These drivers are covered by
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the GNU GPL.
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For more details, see each file's boilerplate comment. The full text
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of the GNU GPL is in the file LICENSE_GPL.txt.
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