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bcachefs: support REMAP_FILE_DEDUP in bch2_remap_file_range

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By removing the early-exit when REMAP_FILE_DEDUP is set, we should be
able to support the fideduperange ioctl, albeit less efficiently than if
we handled some of the extent locking and comparison logic inside
bcachefs.  Extent comparison logic already exists inside of
`__generic_remap_file_range_prep`.

Signed-off-by: Reed Riley <reed@riley.engineer>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Reed Riley 2024-05-11 00:20:12 +00:00 committed by Kent Overstreet
parent 7a254053a5
commit 7f3dc6c98b
1 changed files with 2 additions and 4 deletions
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6
fs/bcachefs/fs-io.c
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@ -867,9 +867,6 @@ loff_t bch2_remap_file_range(struct file *file_src, loff_t pos_src,
if (remap_flags & ~(REMAP_FILE_DEDUP|REMAP_FILE_ADVISORY))
return -EINVAL;
if (remap_flags & REMAP_FILE_DEDUP)
return -EOPNOTSUPP;
if ((pos_src & (block_bytes(c) - 1)) ||
(pos_dst & (block_bytes(c) - 1)))
return -EINVAL;
@ -902,7 +899,8 @@ loff_t bch2_remap_file_range(struct file *file_src, loff_t pos_src,
if (ret)
goto err;
file_update_time(file_dst);
if (!(remap_flags & REMAP_FILE_DEDUP))
file_update_time(file_dst);
bch2_mark_pagecache_unallocated(src, pos_src >> 9,
(pos_src + aligned_len) >> 9);