fs: Add support FALLOC_FL_INSERT_RANGE for fallocate

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FALLOC_FL_INSERT_RANGE command is the opposite command of
FALLOC_FL_COLLAPSE_RANGE that is needed for someone who wants to add
some data in the middle of file.

FALLOC_FL_INSERT_RANGE will create space for writing new data within
a file after shifting extents to right as given length. This command
also has same limitations as FALLOC_FL_COLLAPSE_RANGE in that
operations need to be filesystem block boundary aligned and cannot
cross the current EOF.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

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Namjae Jeon 2015-03-25 15:07:05 +11:00 • committed by Dave Chinner

parent 444a702231

commit dd46c78778

3 changed files with 29 additions and 2 deletions

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8

fs/open.c

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6

include/linux/falloc.h

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17

include/uapi/linux/falloc.h

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