ubifs: Implement RENAME_EXCHANGE

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Adds RENAME_EXCHANGE to UBIFS, the operation itself
is completely disjunct from a regular rename() that's
why we dispatch very early in ubifs_reaname().

RENAME_EXCHANGE used by the renameat2() system call
allows the caller to exchange two paths atomically.
Both paths have to exist and have to be on the same
filesystem.

Signed-off-by: Richard Weinberger <richard@nod.at>

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This commit is contained in:

Richard Weinberger 2016-09-14 22:28:51 +02:00

parent 9e0a1fff8d

commit 9ec64962af

3 changed files with 204 additions and 6 deletions

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65

fs/ubifs/dir.c

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141

fs/ubifs/journal.c

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4

fs/ubifs/ubifs.h

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