Re: [f2fs-dev] [PATCH v7 2/2] f2fs: add F2FS_IOC_SET_COMPRESS_OPTION ioctl
From: Chao Yu
Date: Thu Dec 03 2020 - 01:22:10 EST
On 2020/12/3 14:08, Jaegeuk Kim wrote:
On 12/02, Jaegeuk Kim wrote:
On 12/03, Chao Yu wrote:
Jaegeuk, not sure, is it too late to merge this cleanup into original patch?
Let me merge this on top of tree. Thanks. :)
I integrated this into the original patch since I had to revise this commit. :(
("f2fs: avoid race condition for shinker count")
It's fine to me. :)
Thanks,
From a5c63ec58e0cda6eb5d186b46942eea46422b7a9 Mon Sep 17 00:00:00 2001
From: Chao Yu <yuchao0@xxxxxxxxxx>
Date: Thu, 3 Dec 2020 10:04:26 +0800
Subject: [PATCH] f2fs: remove f2fs_is_compress_algorithm_valid() for cleanup
No logic changes.
Signed-off-by: Chao Yu <yuchao0@xxxxxxxxxx>
---
fs/f2fs/compress.c | 5 -----
fs/f2fs/f2fs.h | 5 -----
fs/f2fs/file.c | 2 +-
3 files changed, 1 insertion(+), 11 deletions(-)
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index dfadbc78946c..869b047a4801 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -574,11 +574,6 @@ bool f2fs_is_compress_backend_ready(struct inode *inode)
return f2fs_cops[F2FS_I(inode)->i_compress_algorithm];
}
-bool f2fs_is_compress_algorithm_valid(unsigned char algorithm)
-{
- return f2fs_cops[algorithm] != NULL;
-}
-
static mempool_t *compress_page_pool;
static int num_compress_pages = 512;
module_param(num_compress_pages, uint, 0444);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index b70c8d553439..17b45c2d2b04 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -3882,7 +3882,6 @@ bool f2fs_compress_write_end(struct inode *inode, void *fsdata,
int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock);
void f2fs_compress_write_end_io(struct bio *bio, struct page *page);
bool f2fs_is_compress_backend_ready(struct inode *inode);
-bool f2fs_is_compress_algorithm_valid(unsigned char algorithm);
int f2fs_init_compress_mempool(void);
void f2fs_destroy_compress_mempool(void);
void f2fs_do_decompress_pages(struct decompress_io_ctx *dic, bool verity);
@@ -3927,10 +3926,6 @@ static inline bool f2fs_is_compress_backend_ready(struct inode *inode)
/* not support compression */
return false;
}
-static inline bool f2fs_is_compress_algorithm_valid(unsigned char algorithm)
-{
- return false;
-}
static inline struct page *f2fs_compress_control_page(struct page *page)
{
WARN_ON_ONCE(1);
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 300355fe25f0..0453b441228d 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -4016,7 +4016,7 @@ static int f2fs_ioc_set_compress_option(struct file *filp, unsigned long arg)
F2FS_I(inode)->i_cluster_size = 1 << option.log_cluster_size;
f2fs_mark_inode_dirty_sync(inode, true);
- if (!f2fs_is_compress_algorithm_valid(option.algorithm))
+ if (!f2fs_is_compress_backend_ready(inode))
f2fs_warn(sbi, "compression algorithm is successfully set, "
"but current kernel doesn't support this algorithm.");
out:
--
2.26.2
On 2020/10/30 12:10, Daeho Jeong wrote:
From: Daeho Jeong <daehojeong@xxxxxxxxxx>
Added a new F2FS_IOC_SET_COMPRESS_OPTION ioctl to change file
compression option of a file.
struct f2fs_comp_option {
u8 algorithm; => compression algorithm
=> 0:lzo, 1:lz4, 2:zstd, 3:lzorle
u8 log_cluster_size; => log scale cluster size
=> 2 ~ 8
};
struct f2fs_comp_option option;
option.algorithm = 1;
option.log_cluster_size = 7;
ioctl(fd, F2FS_IOC_SET_COMPRESS_OPTION, &option);
Signed-off-by: Daeho Jeong <daehojeong@xxxxxxxxxx>
---
v6: changed the function name of checking compression algorithm validity.
v5: allowed to set algorithm which is not currently enabled by kernel.
v4: changed commit message.
v3: changed the error number more specific.
folded in fix for build breakage reported by kernel test robot
<lkp@xxxxxxxxx> and Dan Carpenter <dan.carpenter@xxxxxxxxxx>.
v2: added ioctl description.
---
fs/f2fs/compress.c | 5 +++++
fs/f2fs/f2fs.h | 7 ++++++
fs/f2fs/file.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 66 insertions(+)
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 7895186cc765..b0144670d320 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -514,6 +514,11 @@ bool f2fs_is_compress_backend_ready(struct inode *inode)
return f2fs_cops[F2FS_I(inode)->i_compress_algorithm];
}
+bool f2fs_is_compress_algorithm_valid(unsigned char algorithm)
+{
+ return f2fs_cops[algorithm] != NULL;
+}
+
static mempool_t *compress_page_pool;
static int num_compress_pages = 512;
module_param(num_compress_pages, uint, 0444);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index a33c90cf979b..70a8a2196888 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -435,6 +435,8 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal,
struct f2fs_sectrim_range)
#define F2FS_IOC_GET_COMPRESS_OPTION _IOR(F2FS_IOCTL_MAGIC, 21, \
struct f2fs_comp_option)
+#define F2FS_IOC_SET_COMPRESS_OPTION _IOW(F2FS_IOCTL_MAGIC, 22, \
+ struct f2fs_comp_option)
/*
* should be same as XFS_IOC_GOINGDOWN.
@@ -3915,6 +3917,7 @@ bool f2fs_compress_write_end(struct inode *inode, void *fsdata,
int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock);
void f2fs_compress_write_end_io(struct bio *bio, struct page *page);
bool f2fs_is_compress_backend_ready(struct inode *inode);
+bool f2fs_is_compress_algorithm_valid(unsigned char algorithm);
int f2fs_init_compress_mempool(void);
void f2fs_destroy_compress_mempool(void);
void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity);
@@ -3945,6 +3948,10 @@ static inline bool f2fs_is_compress_backend_ready(struct inode *inode)
/* not support compression */
return false;
}
+static inline bool f2fs_is_compress_algorithm_valid(unsigned char algorithm)
+{
+ return false;
+}
static inline struct page *f2fs_compress_control_page(struct page *page)
{
WARN_ON_ONCE(1);
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index bd52df84219d..be56702e4939 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3963,6 +3963,57 @@ static int f2fs_ioc_get_compress_option(struct file *filp, unsigned long arg)
return 0;
}
+static int f2fs_ioc_set_compress_option(struct file *filp, unsigned long arg)
+{
+ struct inode *inode = file_inode(filp);
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct f2fs_comp_option option;
+ int ret = 0;
+
+ if (!f2fs_sb_has_compression(sbi))
+ return -EOPNOTSUPP;
+
+ if (!(filp->f_mode & FMODE_WRITE))
+ return -EBADF;
+
+ if (copy_from_user(&option, (struct f2fs_comp_option __user *)arg,
+ sizeof(option)))
+ return -EFAULT;
+
+ if (!f2fs_compressed_file(inode) ||
+ option.log_cluster_size < MIN_COMPRESS_LOG_SIZE ||
+ option.log_cluster_size > MAX_COMPRESS_LOG_SIZE ||
+ option.algorithm >= COMPRESS_MAX)
+ return -EINVAL;
+
+ file_start_write(filp);
+ inode_lock(inode);
+
+ if (f2fs_is_mmap_file(inode) || get_dirty_pages(inode)) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ if (inode->i_size != 0) {
+ ret = -EFBIG;
+ goto out;
+ }
+
+ F2FS_I(inode)->i_compress_algorithm = option.algorithm;
+ F2FS_I(inode)->i_log_cluster_size = option.log_cluster_size;
+ F2FS_I(inode)->i_cluster_size = 1 << option.log_cluster_size;
+ f2fs_mark_inode_dirty_sync(inode, true);
+
+ if (!f2fs_is_compress_algorithm_valid(option.algorithm))
+ f2fs_warn(sbi, "compression algorithm is successfully set, "
+ "but current kernel doesn't support this algorithm.");
+out:
+ inode_unlock(inode);
+ file_end_write(filp);
+
+ return ret;
+}
+
long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
@@ -4053,6 +4104,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return f2fs_sec_trim_file(filp, arg);
case F2FS_IOC_GET_COMPRESS_OPTION:
return f2fs_ioc_get_compress_option(filp, arg);
+ case F2FS_IOC_SET_COMPRESS_OPTION:
+ return f2fs_ioc_set_compress_option(filp, arg);
default:
return -ENOTTY;
}
@@ -4224,6 +4277,7 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:
case F2FS_IOC_SEC_TRIM_FILE:
case F2FS_IOC_GET_COMPRESS_OPTION:
+ case F2FS_IOC_SET_COMPRESS_OPTION:
break;
default:
return -ENOIOCTLCMD;
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