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Date: Mon, 8 Jan 2018 18:48:31 +0800
From: Chao Yu <yuchao0@...wei.com>
To: <jaegeuk@...nel.org>
CC: <linux-f2fs-devel@...ts.sourceforge.net>,
<linux-kernel@...r.kernel.org>, <chao@...nel.org>,
Chao Yu <yuchao0@...wei.com>
Subject: [PATCH 1/4] f2fs: support F2FS_IOC_PRECACHE_EXTENTS
This patch introduces a new ioctl F2FS_IOC_PRECACHE_EXTENTS to precache
extent info, in order to gain better performance during data/meta
accessing.
Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
fs/f2fs/data.c | 27 +++++++++++++++++++++++++++
fs/f2fs/f2fs.h | 2 ++
fs/f2fs/file.c | 35 +++++++++++++++++++++++++++++++++++
3 files changed, 64 insertions(+)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 429764118604..f38e660bc889 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -920,6 +920,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
blkcnt_t prealloc;
struct extent_info ei = {0,0,0};
block_t blkaddr;
+ unsigned int start_pgofs;
if (!maxblocks)
return 0;
@@ -935,6 +936,8 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
map->m_pblk = ei.blk + pgofs - ei.fofs;
map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
map->m_flags = F2FS_MAP_MAPPED;
+ if (map->m_next_pgofs)
+ *map->m_next_pgofs = pgofs + map->m_len;
goto out;
}
@@ -957,6 +960,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
goto unlock_out;
}
+ start_pgofs = pgofs;
prealloc = 0;
last_ofs_in_node = ofs_in_node = dn.ofs_in_node;
end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
@@ -990,6 +994,8 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
map->m_pblk = 0;
goto sync_out;
}
+ if (flag == F2FS_GET_BLOCK_PRECACHE)
+ goto sync_out;
if (flag == F2FS_GET_BLOCK_FIEMAP &&
blkaddr == NULL_ADDR) {
if (map->m_next_pgofs)
@@ -1048,6 +1054,16 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
else if (dn.ofs_in_node < end_offset)
goto next_block;
+ if (flag == F2FS_GET_BLOCK_PRECACHE) {
+ if (map->m_flags & F2FS_MAP_MAPPED) {
+ unsigned int ofs = start_pgofs - map->m_lblk;
+
+ f2fs_update_extent_cache_range(&dn,
+ start_pgofs, map->m_pblk + ofs,
+ map->m_len - ofs);
+ }
+ }
+
f2fs_put_dnode(&dn);
if (create) {
@@ -1057,6 +1073,17 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
goto next_dnode;
sync_out:
+ if (flag == F2FS_GET_BLOCK_PRECACHE) {
+ if (map->m_flags & F2FS_MAP_MAPPED) {
+ unsigned int ofs = start_pgofs - map->m_lblk;
+
+ f2fs_update_extent_cache_range(&dn,
+ start_pgofs, map->m_pblk + ofs,
+ map->m_len - ofs);
+ }
+ if (map->m_next_pgofs)
+ *map->m_next_pgofs = pgofs + 1;
+ }
f2fs_put_dnode(&dn);
unlock_out:
if (create) {
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 2f097139b8f7..14177cebc3e7 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -353,6 +353,7 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal,
struct f2fs_gc_range)
#define F2FS_IOC_GET_FEATURES _IOR(F2FS_IOCTL_MAGIC, 12, __u32)
#define F2FS_IOC_SET_PIN_FILE _IOW(F2FS_IOCTL_MAGIC, 13, __u32)
+#define F2FS_IOC_PRECACHE_EXTENTS _IO(F2FS_IOCTL_MAGIC, 14)
#define F2FS_IOC_SET_ENCRYPTION_POLICY FS_IOC_SET_ENCRYPTION_POLICY
#define F2FS_IOC_GET_ENCRYPTION_POLICY FS_IOC_GET_ENCRYPTION_POLICY
@@ -558,6 +559,7 @@ enum {
F2FS_GET_BLOCK_BMAP,
F2FS_GET_BLOCK_PRE_DIO,
F2FS_GET_BLOCK_PRE_AIO,
+ F2FS_GET_BLOCK_PRECACHE,
};
/*
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index e4078b32856c..14e75871acf3 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -2734,6 +2734,38 @@ static int f2fs_ioc_set_pin_file(struct file *filp, unsigned long arg)
return ret;
}
+static int f2fs_ioc_precache_extents(struct file *filp, unsigned long arg)
+{
+ struct inode *inode = file_inode(filp);
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ struct f2fs_map_blocks map;
+ pgoff_t next_pgofs;
+ loff_t end;
+ int err;
+
+ if (is_inode_flag_set(inode, FI_NO_EXTENT))
+ return -EOPNOTSUPP;
+
+ map.m_lblk = 0;
+ map.m_next_pgofs = &next_pgofs;
+ map.m_seg_type = NO_CHECK_TYPE;
+ end = F2FS_I_SB(inode)->max_file_blocks;
+
+ while (map.m_lblk < end) {
+ map.m_len = end - map.m_lblk;
+
+ down_write(&fi->dio_rwsem[WRITE]);
+ err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_PRECACHE);
+ up_write(&fi->dio_rwsem[WRITE]);
+ if (err)
+ return err;
+
+ map.m_lblk = next_pgofs;
+ }
+
+ return 0;
+}
+
long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
@@ -2786,6 +2818,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return f2fs_ioc_fssetxattr(filp, arg);
case F2FS_IOC_SET_PIN_FILE:
return f2fs_ioc_set_pin_file(filp, arg);
+ case F2FS_IOC_PRECACHE_EXTENTS:
+ return f2fs_ioc_precache_extents(filp, arg);
default:
return -ENOTTY;
}
@@ -2862,6 +2896,7 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case F2FS_IOC_FSGETXATTR:
case F2FS_IOC_FSSETXATTR:
case F2FS_IOC_SET_PIN_FILE:
+ case F2FS_IOC_PRECACHE_EXTENTS:
break;
default:
return -ENOIOCTLCMD;
--
2.15.0.55.gc2ece9dc4de6
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