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authorChao Yu <chao2.yu@samsung.com>2015-10-05 22:24:19 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2015-10-09 16:20:56 -0700
commit456b88e4d15de833165cce67c2cdf998139e2fc1 (patch)
tree77f328d4133c04eee8105a7d3a3b6a51f1733da8 /fs/f2fs
parentd530d4d8e237f4d12c93bb76df40b69b8b8a1dcd (diff)
f2fs: introduce a new ioctl F2FS_IOC_WRITE_CHECKPOINT
This patch introduce a new ioctl for those users who want to trigger checkpoint from userspace through ioctl. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/f2fs.h1
-rw-r--r--fs/f2fs/file.c23
2 files changed, 24 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 1b2fc2389a56..18e590248bfc 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -231,6 +231,7 @@ static inline bool __has_cursum_space(struct f2fs_summary_block *sum, int size,
#define F2FS_IOC_RELEASE_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 4)
#define F2FS_IOC_ABORT_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 5)
#define F2FS_IOC_GARBAGE_COLLECT _IO(F2FS_IOCTL_MAGIC, 6)
+#define F2FS_IOC_WRITE_CHECKPOINT _IO(F2FS_IOCTL_MAGIC, 7)
#define F2FS_IOC_SET_ENCRYPTION_POLICY \
_IOR('f', 19, struct f2fs_encryption_policy)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index c26996646bc7..b3985a680521 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1639,6 +1639,27 @@ static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
return f2fs_gc(sbi, sync);
}
+static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)
+{
+ struct inode *inode = file_inode(filp);
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct cp_control cpc;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (f2fs_readonly(sbi->sb))
+ return -EROFS;
+
+ cpc.reason = __get_cp_reason(sbi);
+
+ mutex_lock(&sbi->gc_mutex);
+ write_checkpoint(sbi, &cpc);
+ mutex_unlock(&sbi->gc_mutex);
+
+ return 0;
+}
+
long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
@@ -1670,6 +1691,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return f2fs_ioc_get_encryption_pwsalt(filp, arg);
case F2FS_IOC_GARBAGE_COLLECT:
return f2fs_ioc_gc(filp, arg);
+ case F2FS_IOC_WRITE_CHECKPOINT:
+ return f2fs_ioc_write_checkpoint(filp, arg);
default:
return -ENOTTY;
}