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ext4: mark fc as ineligible using an handle in ext4_xattr_set()

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Calling ext4_fc_mark_ineligible() with a NULL handle is racy and may result
in a fast-commit being done before the filesystem is effectively marked as
ineligible.  This patch moves the call to this function so that an handle
can be used.  If a transaction fails to start, then there's not point in
trying to mark the filesystem as ineligible, and an error will eventually be
returned to user-space.

Suggested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Luis Henriques (SUSE) <luis.henriques@linux.dev>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20240923104909.18342-3-luis.henriques@linux.dev
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
This commit is contained in:
Luis Henriques (SUSE) 2024-09-23 11:49:09 +01:00 committed by Theodore Ts'o
parent faab35a037
commit 04e6ce8f06
1 changed files with 2 additions and 1 deletions
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3
fs/ext4/xattr.c
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@ -2559,6 +2559,8 @@ retry:
error = ext4_xattr_set_handle(handle, inode, name_index, name,
value, value_len, flags);
ext4_fc_mark_ineligible(inode->i_sb, EXT4_FC_REASON_XATTR,
handle);
error2 = ext4_journal_stop(handle);
if (error == -ENOSPC &&
ext4_should_retry_alloc(sb, &retries))
@ -2566,7 +2568,6 @@ retry:
if (error == 0)
error = error2;
}
ext4_fc_mark_ineligible(inode->i_sb, EXT4_FC_REASON_XATTR, NULL);
return error;
}