From: Goldwyn Rodrigues <rgoldwyn@suse.de>
To: linux-btrfs@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, jack@suse.cz, david@fromorbit.com,
willy@infradead.org, hch@lst.de, darrick.wong@oracle.com,
kilobyte@angband.pl, dsterba@suse.cz, nborisov@suse.com,
linux-nvdimm@lists.01.org, Goldwyn Rodrigues <rgoldwyn@suse.com>
Subject: [PATCH 05/18] btrfs: return whether extent is nocow or not
Date: Tue, 16 Apr 2019 11:41:41 -0500 [thread overview]
Message-ID: <20190416164154.30390-6-rgoldwyn@suse.de> (raw)
In-Reply-To: <20190416164154.30390-1-rgoldwyn@suse.de>
From: Goldwyn Rodrigues <rgoldwyn@suse.com>
We require this to make sure we return type IOMAP_DAX_COW in
iomap structure, in the later patches.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
---
fs/btrfs/ctree.h | 2 +-
fs/btrfs/inode.c | 9 +++++++--
2 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index b7bbe5130a3b..050f30165531 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -3278,7 +3278,7 @@ struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
struct btrfs_root *root, int *was_new);
int btrfs_get_extent_map_write(struct extent_map **map, struct buffer_head *bh,
- struct inode *inode, u64 start, u64 len);
+ struct inode *inode, u64 start, u64 len, bool *nocow);
struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
struct page *page, size_t pg_offset,
u64 start, u64 end, int create);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 80184d0c3b52..06764d89490f 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7499,12 +7499,15 @@ static int btrfs_get_blocks_direct_read(struct extent_map *em,
int btrfs_get_extent_map_write(struct extent_map **map,
struct buffer_head *bh,
struct inode *inode,
- u64 start, u64 len)
+ u64 start, u64 len, bool *nocow)
{
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
struct extent_map *em = *map;
int ret = 0;
+ if (nocow)
+ *nocow = false;
+
/*
* We don't allocate a new extent in the following cases
*
@@ -7553,6 +7556,8 @@ int btrfs_get_extent_map_write(struct extent_map **map,
*/
btrfs_free_reserved_data_space_noquota(inode, start,
len);
+ if (nocow)
+ *nocow = true;
/* skip COW */
goto out;
}
@@ -7579,7 +7584,7 @@ static int btrfs_get_blocks_direct_write(struct extent_map **map,
struct extent_map *em;
ret = btrfs_get_extent_map_write(map, bh_result, inode,
- start, len);
+ start, len, NULL);
if (ret < 0)
return ret;
em = *map;
--
2.16.4
next prev parent reply other threads:[~2019-04-16 16:42 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-16 16:41 [PATCH v3 00/18] btrfs dax support Goldwyn Rodrigues
2019-04-16 16:41 ` [PATCH 01/18] btrfs: create a mount option for dax Goldwyn Rodrigues
2019-04-16 16:52 ` Dan Williams
2019-04-16 16:41 ` [PATCH 02/18] btrfs: Carve out btrfs_get_extent_map_write() out of btrfs_get_blocks_write() Goldwyn Rodrigues
2019-04-16 23:45 ` Elliott, Robert (Servers)
2019-04-16 16:41 ` [PATCH 03/18] btrfs: basic dax read Goldwyn Rodrigues
2019-04-16 16:41 ` [PATCH 04/18] dax: Introduce IOMAP_DAX_COW to CoW edges during writes Goldwyn Rodrigues
2019-04-17 16:46 ` Darrick J. Wong
2019-04-16 16:41 ` Goldwyn Rodrigues [this message]
2019-04-16 16:41 ` [PATCH 06/18] btrfs: Rename __endio_write_update_ordered() to btrfs_update_ordered_extent() Goldwyn Rodrigues
2019-04-16 16:41 ` [PATCH 07/18] btrfs: add dax write support Goldwyn Rodrigues
2019-04-16 16:41 ` [PATCH 08/18] dax: memcpy page in case of IOMAP_DAX_COW for mmap faults Goldwyn Rodrigues
2019-04-17 16:52 ` Darrick J. Wong
2019-04-16 16:41 ` [PATCH 09/18] btrfs: Add dax specific address_space_operations Goldwyn Rodrigues
2019-04-16 16:41 ` [PATCH 10/18] dax: replace mmap entry in case of CoW Goldwyn Rodrigues
2019-04-17 15:24 ` Darrick J. Wong
2019-04-16 16:41 ` [PATCH 11/18] btrfs: add dax mmap support Goldwyn Rodrigues
2019-04-16 16:41 ` [PATCH 12/18] btrfs: allow MAP_SYNC mmap Goldwyn Rodrigues
2019-04-16 16:41 ` [PATCH 13/18] fs: dedup file range to use a compare function Goldwyn Rodrigues
2019-04-17 15:36 ` Darrick J. Wong
2019-04-16 16:41 ` [PATCH 14/18] dax: memcpy before zeroing range Goldwyn Rodrigues
2019-04-17 15:45 ` Darrick J. Wong
2019-04-17 16:39 ` Goldwyn Rodrigues
2019-04-16 16:41 ` [PATCH 15/18] btrfs: handle dax page zeroing Goldwyn Rodrigues
2019-04-16 16:41 ` [PATCH 16/18] btrfs: Writeprotect mmap pages on snapshot Goldwyn Rodrigues
2019-04-16 16:41 ` [PATCH 17/18] btrfs: Disable dax-based defrag and send Goldwyn Rodrigues
2019-04-16 16:41 ` [PATCH 18/18] btrfs: trace functions for btrfs_iomap_begin/end Goldwyn Rodrigues
2019-04-17 16:49 ` [PATCH v3 00/18] btrfs dax support Adam Borowski
2019-04-29 17:26 [PATCH v4 " Goldwyn Rodrigues
2019-04-29 17:26 ` [PATCH 05/18] btrfs: return whether extent is nocow or not Goldwyn Rodrigues
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