diff options
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 | ||||
| -rw-r--r-- | fs/f2fs/file.c | 32 | ||||
| -rw-r--r-- | fs/f2fs/gc.h | 6 |
3 files changed, 39 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 88b05cba3d4a..673623b36901 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -228,6 +228,7 @@ static inline bool __has_cursum_space(struct f2fs_summary_block *sum, int size, #define F2FS_IOC_START_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 3) #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_SET_ENCRYPTION_POLICY \ _IOR('f', 19, struct f2fs_encryption_policy) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index fe8398f1d627..dcc01137fca0 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -27,6 +27,7 @@ #include "segment.h" #include "xattr.h" #include "acl.h" +#include "gc.h" #include "trace.h" #include <trace/events/f2fs.h> @@ -1558,6 +1559,35 @@ got_it: return 0; } +static int f2fs_ioc_gc(struct file *filp, unsigned long arg) +{ + struct inode *inode = file_inode(filp); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + __u32 i, count; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (get_user(count, (__u32 __user *)arg)) + return -EFAULT; + + if (!count || count > F2FS_BATCH_GC_MAX_NUM) + return -EINVAL; + + for (i = 0; i < count; i++) { + if (!mutex_trylock(&sbi->gc_mutex)) + break; + + if (f2fs_gc(sbi)) + break; + } + + if (put_user(i, (__u32 __user *)arg)) + return -EFAULT; + + return 0; +} + long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { switch (cmd) { @@ -1587,6 +1617,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) return f2fs_ioc_get_encryption_policy(filp, arg); case F2FS_IOC_GET_ENCRYPTION_PWSALT: return f2fs_ioc_get_encryption_pwsalt(filp, arg); + case F2FS_IOC_GARBAGE_COLLECT: + return f2fs_ioc_gc(filp, arg); default: return -ENOTTY; } diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h index b4a65be9f7d3..c5a055b3376e 100644 --- a/fs/f2fs/gc.h +++ b/fs/f2fs/gc.h @@ -19,6 +19,12 @@ #define LIMIT_INVALID_BLOCK 40 /* percentage over total user space */ #define LIMIT_FREE_BLOCK 40 /* percentage over invalid + free space */ +/* + * with this macro, we can control the max time we do garbage collection, + * when user triggers batch mode gc by ioctl. + */ +#define F2FS_BATCH_GC_MAX_NUM 16 + /* Search max. number of dirty segments to select a victim segment */ #define DEF_MAX_VICTIM_SEARCH 4096 /* covers 8GB */ |