fs: don't block write during exec on pre-content watched files

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Commit 2a010c4128 ("fs: don't block i_writecount during exec") removed
the legacy behavior of getting ETXTBSY on attempt to open and executable
file for write while it is being executed.

This commit was reverted because an application that depends on this
legacy behavior was broken by the change.

We need to allow HSM writing into executable files while executed to
fill their content on-the-fly.

To that end, disable the ETXTBSY legacy behavior for files that are
watched by pre-content events.

This change is not expected to cause regressions with existing systems
which do not have any pre-content event listeners.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Acked-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20241128142532.465176-1-amir73il@gmail.com

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This commit is contained in:

Amir Goldstein 2024-11-28 15:25:32 +01:00 • committed by Jan Kara

parent 5121711eb8

commit 0357ef03c9

5 changed files with 36 additions and 14 deletions

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4

fs/binfmt_elf.c

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4

fs/binfmt_elf_fdpic.c

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8

fs/exec.c

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22

include/linux/fs.h

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12

kernel/fork.c

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