This patch improves dirty bit checking in FAT and coalesces multiple
writes to adjacent blocks into a single write.
For good read performance, the Fat code caches 64KB lines from the
file system. Any update to the data will force 64KB writes. Writing
the full 64KB causes collateral blocks (i.e. blocks belonging to
other files) to be written. This is inefficient to write blocks that
are not dirty, the FAT driver should only be writing blocks that have
actually been updated through its cache.
This also resolves an issue with existing bootloaders which have ways
to update files outside of the FAT code and the collateral write can
corrupt those files. One such file is the Windows BCD that gets updated
outside of the FAT code and has been seen to be corrupted by the
collateral writes, causing the OS to fail to boot.
This fix keeps track of physical disk block (LBA) size and will only
mark LBA size zones of the 64KB cache line that are written to. When the
file is closed and the cached data is written, only the dirty LBAs are
written, which avoids the collateral write and therefore the corruption.
In addition, adjacent LBAs will be coalesced into one write for
performance considerations.
Signed-off-by: Oliver Smith-Denny <osde@linux.microsoft.com>
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737
Apply uncrustify changes to .c/.h files in the FatPkg package
Cc: Andrew Fish <afish@apple.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3739
Update all use of EFI_D_* defines in DEBUG() macros to DEBUG_* defines.
Cc: Andrew Fish <afish@apple.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Michael Kubacki <michael.kubacki@microsoft.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
(based on FatPkg commit b67d81497c36565dba57c7cac308b2f47668a60e)
[jordan.l.justen@intel.com: Use script to relicense to 2-clause BSD]
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Acked-by: Mark Doran <mark.doran@intel.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
(based on FatPkg commit 171c4de5919a4638db8f6f472b365ffbbac6070b)
[jordan.l.justen@intel.com: Use script to relicense to 2-clause BSD]
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Acked-by: Mark Doran <mark.doran@intel.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
(based on FatPkg commit e51cd032db84a6fb1f44a0605f80d96f5fdf4bc6)
[jordan.l.justen@intel.com: Use script to relicense to 2-clause BSD]
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Acked-by: Mark Doran <mark.doran@intel.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Mike Turner
Michael Kubacki
Michael D Kinney
Sean Brogan
Dandan Bi
Ruiyu Ni
Star Zeng
Hot Tian
Qing Huang