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linux: implement filesystem-side copy/clone functions

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This implements the Linux VFS ops required to service the file
copy/clone APIs:

  .copy_file_range    (4.5+)
  .clone_file_range   (4.5-4.19)
  .dedupe_file_range  (4.5-4.19)
  .remap_file_range   (4.20+)

Note that dedupe_file_range() and remap_file_range(REMAP_FILE_DEDUP) are
hooked up here, but are not implemented yet.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Kay Pedersen <mail@mkwg.de>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Sponsored-By: OpenDrives Inc.
Sponsored-By: Klara Inc.
Closes #15050
This commit is contained in:
Rob Norris
2023-06-27 23:44:53 +10:00
committed by Brian Behlendorf
parent f6facd2429
commit 5a35c68b67
6 changed files with 384 additions and 1 deletions
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module/Kbuild.in
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@@ -461,6 +461,7 @@ ZFS_OBJS_OS := \
zpl_ctldir.o \
zpl_export.o \
zpl_file.o \
zpl_file_range.o \
zpl_inode.o \
zpl_super.o \
zpl_xattr.o \