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| author | Yunlei He <heyunlei@huawei.com> | 2017-03-13 20:22:18 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-03-25 00:19:37 -0700 |
| commit | 59c9081bc86ef0b273a41abf2c1f413301429a6d (patch) | |
| tree | 64297b01f018b2eff6ae04e6668a06e4eafcba97 /fs/f2fs/data.c | |
| parent | 22588f8773f687449ce6e97dce9f102553440d30 (diff) | |
| download | linux-59c9081bc86ef0b273a41abf2c1f413301429a6d.tar.bz2 | |
f2fs: allow write page cache when writting cp
This patch allow write data to normal file when writting
new checkpoint.
We relax three limitations for write_begin path:
1. data allocation
2. node allocation
3. variables in checkpoint
Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/data.c')
| -rw-r--r-- | fs/f2fs/data.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 2c8485bb6eb1..090413236b27 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -787,6 +787,21 @@ int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) return err; } +static inline void __do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock) +{ + if (flag == F2FS_GET_BLOCK_PRE_AIO) { + if (lock) + down_read(&sbi->node_change); + else + up_read(&sbi->node_change); + } else { + if (lock) + f2fs_lock_op(sbi); + else + f2fs_unlock_op(sbi); + } +} + /* * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with * f2fs_map_blocks structure. @@ -829,7 +844,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, next_dnode: if (create) - f2fs_lock_op(sbi); + __do_map_lock(sbi, flag, true); /* When reading holes, we need its node page */ set_new_dnode(&dn, inode, NULL, NULL, 0); @@ -939,7 +954,7 @@ skip: f2fs_put_dnode(&dn); if (create) { - f2fs_unlock_op(sbi); + __do_map_lock(sbi, flag, false); f2fs_balance_fs(sbi, dn.node_changed); } goto next_dnode; @@ -948,7 +963,7 @@ sync_out: f2fs_put_dnode(&dn); unlock_out: if (create) { - f2fs_unlock_op(sbi); + __do_map_lock(sbi, flag, false); f2fs_balance_fs(sbi, dn.node_changed); } out: @@ -1688,7 +1703,7 @@ static int prepare_write_begin(struct f2fs_sb_info *sbi, if (f2fs_has_inline_data(inode) || (pos & PAGE_MASK) >= i_size_read(inode)) { - f2fs_lock_op(sbi); + __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true); locked = true; } restart: @@ -1724,7 +1739,8 @@ restart: err = get_dnode_of_data(&dn, index, LOOKUP_NODE); if (err || dn.data_blkaddr == NULL_ADDR) { f2fs_put_dnode(&dn); - f2fs_lock_op(sbi); + __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, + true); locked = true; goto restart; } @@ -1738,7 +1754,7 @@ out: f2fs_put_dnode(&dn); unlock_out: if (locked) - f2fs_unlock_op(sbi); + __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false); return err; } |