* [PATCH v2] f2fs: support zero sized file truncate for device aliasing files
@ 2025-03-21 21:33 Daeho Jeong
2025-03-24 16:28 ` Jaegeuk Kim
2025-03-25 2:19 ` [f2fs-dev] " Chao Yu
0 siblings, 2 replies; 4+ messages in thread
From: Daeho Jeong @ 2025-03-21 21:33 UTC (permalink / raw)
To: linux-kernel, linux-f2fs-devel, kernel-team; +Cc: Daeho Jeong
From: Daeho Jeong <daehojeong@google.com>
support a file truncation to zero size for device aliasing files.
Signed-off-by: Daeho Jeong <daehojeong@google.com>
---
v2: make the extent length zero
---
fs/f2fs/file.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index f92a9fba9991..69952f208086 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -775,6 +775,11 @@ int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock)
f2fs_update_time(sbi, REQ_TIME);
f2fs_put_page(ipage, 1);
+
+ write_lock(&et->lock);
+ et->largest.len = 0;
+ write_unlock(&et->lock);
+
goto out;
}
@@ -1036,7 +1041,7 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
if ((attr->ia_valid & ATTR_SIZE)) {
if (!f2fs_is_compress_backend_ready(inode) ||
- IS_DEVICE_ALIASING(inode))
+ (IS_DEVICE_ALIASING(inode) && attr->ia_size))
return -EOPNOTSUPP;
if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) &&
!IS_ALIGNED(attr->ia_size,
--
2.49.0.395.g12beb8f557-goog
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH v2] f2fs: support zero sized file truncate for device aliasing files
2025-03-21 21:33 [PATCH v2] f2fs: support zero sized file truncate for device aliasing files Daeho Jeong
@ 2025-03-24 16:28 ` Jaegeuk Kim
2025-03-24 16:56 ` Daeho Jeong
2025-03-25 2:19 ` [f2fs-dev] " Chao Yu
1 sibling, 1 reply; 4+ messages in thread
From: Jaegeuk Kim @ 2025-03-24 16:28 UTC (permalink / raw)
To: Daeho Jeong; +Cc: linux-kernel, linux-f2fs-devel, kernel-team, Daeho Jeong
Do we still need this patch?
On 03/21, Daeho Jeong wrote:
> From: Daeho Jeong <daehojeong@google.com>
>
> support a file truncation to zero size for device aliasing files.
>
> Signed-off-by: Daeho Jeong <daehojeong@google.com>
> ---
> v2: make the extent length zero
> ---
> fs/f2fs/file.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index f92a9fba9991..69952f208086 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -775,6 +775,11 @@ int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock)
> f2fs_update_time(sbi, REQ_TIME);
>
> f2fs_put_page(ipage, 1);
> +
> + write_lock(&et->lock);
> + et->largest.len = 0;
> + write_unlock(&et->lock);
> +
> goto out;
> }
>
> @@ -1036,7 +1041,7 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
>
> if ((attr->ia_valid & ATTR_SIZE)) {
> if (!f2fs_is_compress_backend_ready(inode) ||
> - IS_DEVICE_ALIASING(inode))
> + (IS_DEVICE_ALIASING(inode) && attr->ia_size))
> return -EOPNOTSUPP;
> if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) &&
> !IS_ALIGNED(attr->ia_size,
> --
> 2.49.0.395.g12beb8f557-goog
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v2] f2fs: support zero sized file truncate for device aliasing files
2025-03-24 16:28 ` Jaegeuk Kim
@ 2025-03-24 16:56 ` Daeho Jeong
0 siblings, 0 replies; 4+ messages in thread
From: Daeho Jeong @ 2025-03-24 16:56 UTC (permalink / raw)
To: Jaegeuk Kim; +Cc: linux-kernel, linux-f2fs-devel, kernel-team, Daeho Jeong
On Mon, Mar 24, 2025 at 9:28 AM Jaegeuk Kim <jaegeuk@kernel.org> wrote:
>
> Do we still need this patch?
Yes, in many circumstances, we cannot remove the aliasing file because
of SELinux.
>
> On 03/21, Daeho Jeong wrote:
> > From: Daeho Jeong <daehojeong@google.com>
> >
> > support a file truncation to zero size for device aliasing files.
> >
> > Signed-off-by: Daeho Jeong <daehojeong@google.com>
> > ---
> > v2: make the extent length zero
> > ---
> > fs/f2fs/file.c | 7 ++++++-
> > 1 file changed, 6 insertions(+), 1 deletion(-)
> >
> > diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> > index f92a9fba9991..69952f208086 100644
> > --- a/fs/f2fs/file.c
> > +++ b/fs/f2fs/file.c
> > @@ -775,6 +775,11 @@ int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock)
> > f2fs_update_time(sbi, REQ_TIME);
> >
> > f2fs_put_page(ipage, 1);
> > +
> > + write_lock(&et->lock);
> > + et->largest.len = 0;
> > + write_unlock(&et->lock);
> > +
> > goto out;
> > }
> >
> > @@ -1036,7 +1041,7 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
> >
> > if ((attr->ia_valid & ATTR_SIZE)) {
> > if (!f2fs_is_compress_backend_ready(inode) ||
> > - IS_DEVICE_ALIASING(inode))
> > + (IS_DEVICE_ALIASING(inode) && attr->ia_size))
> > return -EOPNOTSUPP;
> > if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) &&
> > !IS_ALIGNED(attr->ia_size,
> > --
> > 2.49.0.395.g12beb8f557-goog
> >
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [f2fs-dev] [PATCH v2] f2fs: support zero sized file truncate for device aliasing files
2025-03-21 21:33 [PATCH v2] f2fs: support zero sized file truncate for device aliasing files Daeho Jeong
2025-03-24 16:28 ` Jaegeuk Kim
@ 2025-03-25 2:19 ` Chao Yu
1 sibling, 0 replies; 4+ messages in thread
From: Chao Yu @ 2025-03-25 2:19 UTC (permalink / raw)
To: Daeho Jeong, linux-kernel, linux-f2fs-devel, kernel-team
Cc: chao, Daeho Jeong
On 3/22/25 05:33, Daeho Jeong wrote:
> From: Daeho Jeong <daehojeong@google.com>
>
> support a file truncation to zero size for device aliasing files.
>
> Signed-off-by: Daeho Jeong <daehojeong@google.com>
> ---
> v2: make the extent length zero
> ---
> fs/f2fs/file.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index f92a9fba9991..69952f208086 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -775,6 +775,11 @@ int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock)
> f2fs_update_time(sbi, REQ_TIME);
>
> f2fs_put_page(ipage, 1);
> +
> + write_lock(&et->lock);
> + et->largest.len = 0;
> + write_unlock(&et->lock);
f2fs_mark_inode_dirty_sync(inode, true); ?
Thanks,
> +
> goto out;
> }
>
> @@ -1036,7 +1041,7 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
>
> if ((attr->ia_valid & ATTR_SIZE)) {
> if (!f2fs_is_compress_backend_ready(inode) ||
> - IS_DEVICE_ALIASING(inode))
> + (IS_DEVICE_ALIASING(inode) && attr->ia_size))
> return -EOPNOTSUPP;
> if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) &&
> !IS_ALIGNED(attr->ia_size,
^ permalink raw reply [flat|nested] 4+ messages in thread
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2025-03-21 21:33 [PATCH v2] f2fs: support zero sized file truncate for device aliasing files Daeho Jeong
2025-03-24 16:28 ` Jaegeuk Kim
2025-03-24 16:56 ` Daeho Jeong
2025-03-25 2:19 ` [f2fs-dev] " Chao Yu
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