From: Chao Yu <yuchao0@huawei.com>
To: <jaegeuk@kernel.org>
Cc: <linux-f2fs-devel@lists.sourceforge.net>,
<linux-kernel@vger.kernel.org>, <chao@kernel.org>,
Chao Yu <yuchao0@huawei.com>
Subject: [RFC PATCH 1/2] f2fs: introduce F2FS_IOC_GET_COMPRESS_BLOCKS
Date: Fri, 21 Feb 2020 18:09:21 +0800 [thread overview]
Message-ID: <20200221100922.16781-1-yuchao0@huawei.com> (raw)
With this newly introduced interface, user can get block
number compression saved in target inode.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
fs/f2fs/f2fs.h | 1 +
fs/f2fs/file.c | 18 ++++++++++++++++++
2 files changed, 19 insertions(+)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 5d047c0bbbbb..15199df5d40a 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -426,6 +426,7 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal,
#define F2FS_IOC_GET_PIN_FILE _IOR(F2FS_IOCTL_MAGIC, 14, __u32)
#define F2FS_IOC_PRECACHE_EXTENTS _IO(F2FS_IOCTL_MAGIC, 15)
#define F2FS_IOC_RESIZE_FS _IOW(F2FS_IOCTL_MAGIC, 16, __u64)
+#define F2FS_IOC_GET_COMPRESS_BLOCKS _IOR(F2FS_IOCTL_MAGIC, 17, __u64)
#define F2FS_IOC_GET_VOLUME_NAME FS_IOC_GETFSLABEL
#define F2FS_IOC_SET_VOLUME_NAME FS_IOC_SETFSLABEL
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index efca4ed17b7d..235708c892af 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3401,6 +3401,21 @@ static int f2fs_set_volume_name(struct file *filp, unsigned long arg)
return err;
}
+static int f2fs_get_compress_blocks(struct file *filp, unsigned long arg)
+{
+ struct inode *inode = file_inode(filp);
+ __u64 blocks;
+
+ if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
+ return -EOPNOTSUPP;
+
+ if (!f2fs_compressed_file(inode))
+ return -EINVAL;
+
+ blocks = F2FS_I(inode)->i_compr_blocks;
+ return put_user(blocks, (u64 __user *)arg);
+}
+
long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
@@ -3479,6 +3494,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return f2fs_get_volume_name(filp, arg);
case F2FS_IOC_SET_VOLUME_NAME:
return f2fs_set_volume_name(filp, arg);
+ case F2FS_IOC_GET_COMPRESS_BLOCKS:
+ return f2fs_get_compress_blocks(filp, arg);
default:
return -ENOTTY;
}
@@ -3636,6 +3653,7 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case FS_IOC_MEASURE_VERITY:
case F2FS_IOC_GET_VOLUME_NAME:
case F2FS_IOC_SET_VOLUME_NAME:
+ case F2FS_IOC_GET_COMPRESS_BLOCKS:
break;
default:
return -ENOIOCTLCMD;
--
2.18.0.rc1
next reply other threads:[~2020-02-21 10:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-21 10:09 Chao Yu [this message]
2020-02-21 10:09 ` [RFC PATCH 2/2] f2fs: introduce F2FS_IOC_RELEASE_COMPRESS_BLOCKS Chao Yu
2020-02-24 21:46 ` Jaegeuk Kim
2020-02-25 1:46 ` Chao Yu
2020-02-26 22:16 ` Jaegeuk Kim
2020-02-27 2:02 ` Chao Yu
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