On 2024/3/15 9:46, Zhiguo Niu wrote:
On Thu, Mar 14, 2024 at 9:06 PM Chao Yu <c...@kernel.org> wrote:

On 2024/3/13 12:11, Zhiguo Niu wrote:
some user behaviors requested filesystem operations, which
will cause filesystem not idle.
Meanwhile adjust f2fs_update_time(REQ_TIME) of
f2fs_ioc_defragment to successful case.

Signed-off-by: Zhiguo Niu <zhiguo....@unisoc.com>
---
   fs/f2fs/file.c | 9 ++++++++-
   1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 4dfe38e..dac3836 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -2784,7 +2784,6 @@ static int f2fs_ioc_defragment(struct file *filp, 
unsigned long arg)
       err = f2fs_defragment_range(sbi, filp, &range);
       mnt_drop_write_file(filp);

-     f2fs_update_time(sbi, REQ_TIME);

I guess we need to call f2fs_update_time() here if any data was
migrated.
OK!

if (range->len)
         f2fs_update_time(sbi, REQ_TIME);

       if (err < 0)
               return err;

@@ -2792,6 +2791,7 @@ static int f2fs_ioc_defragment(struct file *filp, 
unsigned long arg)
                                                       sizeof(range)))
               return -EFAULT;

+     f2fs_update_time(sbi, REQ_TIME);
       return 0;
   }

@@ -3331,6 +3331,7 @@ static int f2fs_ioc_resize_fs(struct file *filp, unsigned 
long arg)
       if (copy_from_user(&block_count, (void __user *)arg,
                          sizeof(block_count)))
               return -EFAULT;
+     f2fs_update_time(sbi, REQ_TIME);

There will be no further IO in the end of f2fs_ioc_resize_fs(), so we don't
need to update time to delay gc/discard thread?


       return f2fs_resize_fs(filp, block_count);
   }
@@ -3424,6 +3425,7 @@ static int f2fs_ioc_setfslabel(struct file *filp, 
unsigned long arg)
       f2fs_up_write(&sbi->sb_lock);

       mnt_drop_write_file(filp);
+     f2fs_update_time(sbi, REQ_TIME);

Ditto,
Dear Chao,

The two parts you proposed should be similar to the below scenario?
---------------------------------------------------------
static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
{
struct inode *inode = file_inode(filp);

if (!f2fs_sb_has_encrypt(F2FS_I_SB(inode)))
return -EOPNOTSUPP;

f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);

return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);

fscrypt_ioctl_set_policy() will dirty inode, so we need to keep
f2fs_update_time(), but it's better to update time after
fscrypt_ioctl_set_policy()?

Thanks,

}
-----------------------------------------------------------
thanks!



Thanks,

   out:
       kfree(vbuf);
       return err;
@@ -3597,6 +3599,7 @@ static int f2fs_release_compress_blocks(struct file 
*filp, unsigned long arg)

       filemap_invalidate_unlock(inode->i_mapping);
       f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+     f2fs_update_time(sbi, REQ_TIME);
   out:
       inode_unlock(inode);

@@ -3766,6 +3769,7 @@ static int f2fs_reserve_compress_blocks(struct file 
*filp, unsigned long arg)
               clear_inode_flag(inode, FI_COMPRESS_RELEASED);
               inode_set_ctime_current(inode);
               f2fs_mark_inode_dirty_sync(inode, true);
+             f2fs_update_time(sbi, REQ_TIME);
       }
   unlock_inode:
       inode_unlock(inode);
@@ -3964,6 +3968,7 @@ static int f2fs_sec_trim_file(struct file *filp, unsigned 
long arg)
       if (len)
               ret = f2fs_secure_erase(prev_bdev, inode, prev_index,
                               prev_block, len, range.flags);
+     f2fs_update_time(sbi, REQ_TIME);
   out:
       filemap_invalidate_unlock(mapping);
       f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
@@ -4173,6 +4178,7 @@ static int f2fs_ioc_decompress_file(struct file *filp)
       if (ret)
               f2fs_warn(sbi, "%s: The file might be partially decompressed 
(errno=%d). Please delete the file.",
                         __func__, ret);
+     f2fs_update_time(sbi, REQ_TIME);
   out:
       inode_unlock(inode);
       file_end_write(filp);
@@ -4252,6 +4258,7 @@ static int f2fs_ioc_compress_file(struct file *filp)
       if (ret)
               f2fs_warn(sbi, "%s: The file might be partially compressed 
(errno=%d). Please delete the file.",
                         __func__, ret);
+     f2fs_update_time(sbi, REQ_TIME);
   out:
       inode_unlock(inode);
       file_end_write(filp);


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