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| author | Chao Yu <chao2.yu@samsung.com> | 2015-10-05 22:24:19 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-10-09 16:20:56 -0700 |
| commit | 456b88e4d15de833165cce67c2cdf998139e2fc1 (patch) | |
| tree | 77f328d4133c04eee8105a7d3a3b6a51f1733da8 /fs/f2fs | |
| parent | d530d4d8e237f4d12c93bb76df40b69b8b8a1dcd (diff) | |
| download | lwn-456b88e4d15de833165cce67c2cdf998139e2fc1.tar.gz lwn-456b88e4d15de833165cce67c2cdf998139e2fc1.zip | |
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.h | 1 | ||||
| -rw-r--r-- | fs/f2fs/file.c | 23 |
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; } |