* [PATCH v3] f2fs: change fiemap way in printing compression chunk
@ 2021-07-23 7:49 Daeho Jeong
2021-07-23 20:29 ` [f2fs-dev] " Eric Biggers
2021-07-24 1:19 ` Jaegeuk Kim
0 siblings, 2 replies; 3+ messages in thread
From: Daeho Jeong @ 2021-07-23 7:49 UTC (permalink / raw)
To: linux-kernel, linux-f2fs-devel, kernel-team; +Cc: Daeho Jeong
From: Daeho Jeong <daehojeong@google.com>
When we print out a discontinuous compression chunk, it shows like a
continuous chunk now. To show it more correctly, I've changed the way of
printing fiemap info like below. Plus, eliminated NEW_ADDR(-1) in fiemap
info, since it is not in fiemap user api manual.
Let's assume 16KB compression cluster.
<before>
Logical Physical Length Flags
0: 0000000000000000 00000002c091f000 0000000000004000 1008
1: 0000000000004000 00000002c0920000 0000000000004000 1008
...
9: 0000000000034000 0000000f8c623000 0000000000004000 1008
10: 0000000000038000 000000101a6eb000 0000000000004000 1008
<after>
0: 0000000000000000 00000002c091f000 0000000000004000 1008
1: 0000000000004000 00000002c0920000 0000000000004000 1008
...
9: 0000000000034000 0000000f8c623000 0000000000001000 1008
10: 0000000000035000 000000101a6ea000 0000000000003000 1008
11: 0000000000038000 000000101a6eb000 0000000000002000 1008
12: 000000000003a000 00000002c3544000 0000000000002000 1008
Flags
0x1000 => FIEMAP_EXTENT_MERGED
0x0008 => FIEMAP_EXTENT_ENCODED
Signed-off-by: Daeho Jeong <daehojeong@google.com>
---
v3: fix the missing last extent flag issue
v2: changed the print format
---
fs/f2fs/data.c | 75 ++++++++++++++++++++++++++++----------------------
1 file changed, 42 insertions(+), 33 deletions(-)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 3a01a1b50104..29b09a74cdc9 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1843,8 +1843,9 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
u64 logical = 0, phys = 0, size = 0;
u32 flags = 0;
int ret = 0;
- bool compr_cluster = false;
+ bool compr_cluster = false, compr_appended;
unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;
+ unsigned int count_in_cluster;
loff_t maxbytes;
if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
@@ -1892,15 +1893,17 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
map.m_next_pgofs = &next_pgofs;
map.m_seg_type = NO_CHECK_TYPE;
- if (compr_cluster)
- map.m_len = cluster_size - 1;
+ if (compr_cluster) {
+ map.m_lblk += 1;
+ map.m_len = cluster_size - count_in_cluster;
+ }
ret = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_FIEMAP);
if (ret)
goto out;
/* HOLE */
- if (!(map.m_flags & F2FS_MAP_FLAGS)) {
+ if (!compr_cluster && !(map.m_flags & F2FS_MAP_FLAGS)) {
start_blk = next_pgofs;
if (blks_to_bytes(inode, start_blk) < blks_to_bytes(inode,
@@ -1910,6 +1913,14 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
flags |= FIEMAP_EXTENT_LAST;
}
+ compr_appended = false;
+ /* In a case of compressed cluster, append this to the last extent */
+ if (compr_cluster && ((map.m_flags & F2FS_MAP_UNWRITTEN) ||
+ !(map.m_flags & F2FS_MAP_FLAGS))) {
+ compr_appended = true;
+ goto skip_fill;
+ }
+
if (size) {
flags |= FIEMAP_EXTENT_MERGED;
if (IS_ENCRYPTED(inode))
@@ -1926,38 +1937,36 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
if (start_blk > last_blk)
goto out;
- if (compr_cluster) {
- compr_cluster = false;
-
-
- logical = blks_to_bytes(inode, start_blk - 1);
- phys = blks_to_bytes(inode, map.m_pblk);
- size = blks_to_bytes(inode, cluster_size);
-
- flags |= FIEMAP_EXTENT_ENCODED;
-
- start_blk += cluster_size - 1;
-
- if (start_blk > last_blk)
- goto out;
-
- goto prep_next;
- }
-
+skip_fill:
if (map.m_pblk == COMPRESS_ADDR) {
compr_cluster = true;
- start_blk++;
- goto prep_next;
- }
-
- logical = blks_to_bytes(inode, start_blk);
- phys = blks_to_bytes(inode, map.m_pblk);
- size = blks_to_bytes(inode, map.m_len);
- flags = 0;
- if (map.m_flags & F2FS_MAP_UNWRITTEN)
- flags = FIEMAP_EXTENT_UNWRITTEN;
+ count_in_cluster = 1;
+ } else if (compr_appended) {
+ unsigned int appended_blks = cluster_size -
+ count_in_cluster + 1;
+ size += blks_to_bytes(inode, appended_blks);
+ start_blk += appended_blks;
+ compr_cluster = false;
+ } else {
+ logical = blks_to_bytes(inode, start_blk);
+ phys = __is_valid_data_blkaddr(map.m_pblk) ?
+ blks_to_bytes(inode, map.m_pblk) : 0;
+ size = blks_to_bytes(inode, map.m_len);
+ flags = 0;
+
+ if (compr_cluster) {
+ flags = FIEMAP_EXTENT_ENCODED;
+ count_in_cluster += map.m_len;
+ if (count_in_cluster == cluster_size) {
+ compr_cluster = false;
+ size += blks_to_bytes(inode, 1);
+ }
+ } else if (map.m_flags & F2FS_MAP_UNWRITTEN) {
+ flags = FIEMAP_EXTENT_UNWRITTEN;
+ }
- start_blk += bytes_to_blks(inode, size);
+ start_blk += bytes_to_blks(inode, size);
+ }
prep_next:
cond_resched();
--
2.32.0.432.gabb21c7263-goog
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [f2fs-dev] [PATCH v3] f2fs: change fiemap way in printing compression chunk
2021-07-23 7:49 [PATCH v3] f2fs: change fiemap way in printing compression chunk Daeho Jeong
@ 2021-07-23 20:29 ` Eric Biggers
2021-07-24 1:19 ` Jaegeuk Kim
1 sibling, 0 replies; 3+ messages in thread
From: Eric Biggers @ 2021-07-23 20:29 UTC (permalink / raw)
To: Daeho Jeong; +Cc: linux-kernel, linux-f2fs-devel, kernel-team, Daeho Jeong
On Fri, Jul 23, 2021 at 12:49:28AM -0700, Daeho Jeong wrote:
> From: Daeho Jeong <daehojeong@google.com>
>
> When we print out a discontinuous compression chunk, it shows like a
> continuous chunk now. To show it more correctly, I've changed the way of
> printing fiemap info like below. Plus, eliminated NEW_ADDR(-1) in fiemap
> info, since it is not in fiemap user api manual.
>
> Let's assume 16KB compression cluster.
>
> <before>
> Logical Physical Length Flags
> 0: 0000000000000000 00000002c091f000 0000000000004000 1008
> 1: 0000000000004000 00000002c0920000 0000000000004000 1008
> ...
> 9: 0000000000034000 0000000f8c623000 0000000000004000 1008
> 10: 0000000000038000 000000101a6eb000 0000000000004000 1008
>
> <after>
> 0: 0000000000000000 00000002c091f000 0000000000004000 1008
> 1: 0000000000004000 00000002c0920000 0000000000004000 1008
> ...
> 9: 0000000000034000 0000000f8c623000 0000000000001000 1008
> 10: 0000000000035000 000000101a6ea000 0000000000003000 1008
> 11: 0000000000038000 000000101a6eb000 0000000000002000 1008
> 12: 000000000003a000 00000002c3544000 0000000000002000 1008
>
> Flags
> 0x1000 => FIEMAP_EXTENT_MERGED
> 0x0008 => FIEMAP_EXTENT_ENCODED
>
> Signed-off-by: Daeho Jeong <daehojeong@google.com>
>
> ---
> v3: fix the missing last extent flag issue
> v2: changed the print format
> ---
> fs/f2fs/data.c | 75 ++++++++++++++++++++++++++++----------------------
> 1 file changed, 42 insertions(+), 33 deletions(-)
I can't understand the code in f2fs_fiemap(), but I tested that my two
compression+encryption tests (xfstest f2fs/002 and Android
vts_kernel_encryption_test) pass reliably when this patch is applied.
Tested-by: Eric Biggers <ebiggers@google.com>
- Eric
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v3] f2fs: change fiemap way in printing compression chunk
2021-07-23 7:49 [PATCH v3] f2fs: change fiemap way in printing compression chunk Daeho Jeong
2021-07-23 20:29 ` [f2fs-dev] " Eric Biggers
@ 2021-07-24 1:19 ` Jaegeuk Kim
1 sibling, 0 replies; 3+ messages in thread
From: Jaegeuk Kim @ 2021-07-24 1:19 UTC (permalink / raw)
To: Daeho Jeong; +Cc: linux-kernel, linux-f2fs-devel, kernel-team, Daeho Jeong
On 07/23, Daeho Jeong wrote:
> From: Daeho Jeong <daehojeong@google.com>
>
> When we print out a discontinuous compression chunk, it shows like a
> continuous chunk now. To show it more correctly, I've changed the way of
> printing fiemap info like below. Plus, eliminated NEW_ADDR(-1) in fiemap
> info, since it is not in fiemap user api manual.
>
> Let's assume 16KB compression cluster.
>
> <before>
> Logical Physical Length Flags
> 0: 0000000000000000 00000002c091f000 0000000000004000 1008
> 1: 0000000000004000 00000002c0920000 0000000000004000 1008
> ...
> 9: 0000000000034000 0000000f8c623000 0000000000004000 1008
> 10: 0000000000038000 000000101a6eb000 0000000000004000 1008
>
> <after>
> 0: 0000000000000000 00000002c091f000 0000000000004000 1008
> 1: 0000000000004000 00000002c0920000 0000000000004000 1008
> ...
> 9: 0000000000034000 0000000f8c623000 0000000000001000 1008
> 10: 0000000000035000 000000101a6ea000 0000000000003000 1008
> 11: 0000000000038000 000000101a6eb000 0000000000002000 1008
> 12: 000000000003a000 00000002c3544000 0000000000002000 1008
>
> Flags
> 0x1000 => FIEMAP_EXTENT_MERGED
> 0x0008 => FIEMAP_EXTENT_ENCODED
>
> Signed-off-by: Daeho Jeong <daehojeong@google.com>
>
> ---
> v3: fix the missing last extent flag issue
> v2: changed the print format
> ---
> fs/f2fs/data.c | 75 ++++++++++++++++++++++++++++----------------------
> 1 file changed, 42 insertions(+), 33 deletions(-)
>
> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> index 3a01a1b50104..29b09a74cdc9 100644
> --- a/fs/f2fs/data.c
> +++ b/fs/f2fs/data.c
> @@ -1843,8 +1843,9 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
> u64 logical = 0, phys = 0, size = 0;
> u32 flags = 0;
> int ret = 0;
> - bool compr_cluster = false;
> + bool compr_cluster = false, compr_appended;
> unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;
> + unsigned int count_in_cluster;
Can we initialize to 0, as compiler complains?
unsigned int count_in_cluster = 0;
> loff_t maxbytes;
>
> if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
> @@ -1892,15 +1893,17 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
> map.m_next_pgofs = &next_pgofs;
> map.m_seg_type = NO_CHECK_TYPE;
>
> - if (compr_cluster)
> - map.m_len = cluster_size - 1;
> + if (compr_cluster) {
> + map.m_lblk += 1;
> + map.m_len = cluster_size - count_in_cluster;
> + }
>
> ret = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_FIEMAP);
> if (ret)
> goto out;
>
> /* HOLE */
> - if (!(map.m_flags & F2FS_MAP_FLAGS)) {
> + if (!compr_cluster && !(map.m_flags & F2FS_MAP_FLAGS)) {
> start_blk = next_pgofs;
>
> if (blks_to_bytes(inode, start_blk) < blks_to_bytes(inode,
> @@ -1910,6 +1913,14 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
> flags |= FIEMAP_EXTENT_LAST;
> }
>
> + compr_appended = false;
> + /* In a case of compressed cluster, append this to the last extent */
> + if (compr_cluster && ((map.m_flags & F2FS_MAP_UNWRITTEN) ||
> + !(map.m_flags & F2FS_MAP_FLAGS))) {
> + compr_appended = true;
> + goto skip_fill;
> + }
> +
> if (size) {
> flags |= FIEMAP_EXTENT_MERGED;
> if (IS_ENCRYPTED(inode))
> @@ -1926,38 +1937,36 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
> if (start_blk > last_blk)
> goto out;
>
> - if (compr_cluster) {
> - compr_cluster = false;
> -
> -
> - logical = blks_to_bytes(inode, start_blk - 1);
> - phys = blks_to_bytes(inode, map.m_pblk);
> - size = blks_to_bytes(inode, cluster_size);
> -
> - flags |= FIEMAP_EXTENT_ENCODED;
> -
> - start_blk += cluster_size - 1;
> -
> - if (start_blk > last_blk)
> - goto out;
> -
> - goto prep_next;
> - }
> -
> +skip_fill:
> if (map.m_pblk == COMPRESS_ADDR) {
> compr_cluster = true;
> - start_blk++;
> - goto prep_next;
> - }
> -
> - logical = blks_to_bytes(inode, start_blk);
> - phys = blks_to_bytes(inode, map.m_pblk);
> - size = blks_to_bytes(inode, map.m_len);
> - flags = 0;
> - if (map.m_flags & F2FS_MAP_UNWRITTEN)
> - flags = FIEMAP_EXTENT_UNWRITTEN;
> + count_in_cluster = 1;
> + } else if (compr_appended) {
> + unsigned int appended_blks = cluster_size -
> + count_in_cluster + 1;
> + size += blks_to_bytes(inode, appended_blks);
> + start_blk += appended_blks;
> + compr_cluster = false;
> + } else {
> + logical = blks_to_bytes(inode, start_blk);
> + phys = __is_valid_data_blkaddr(map.m_pblk) ?
> + blks_to_bytes(inode, map.m_pblk) : 0;
> + size = blks_to_bytes(inode, map.m_len);
> + flags = 0;
> +
> + if (compr_cluster) {
> + flags = FIEMAP_EXTENT_ENCODED;
> + count_in_cluster += map.m_len;
> + if (count_in_cluster == cluster_size) {
> + compr_cluster = false;
> + size += blks_to_bytes(inode, 1);
> + }
> + } else if (map.m_flags & F2FS_MAP_UNWRITTEN) {
> + flags = FIEMAP_EXTENT_UNWRITTEN;
> + }
>
> - start_blk += bytes_to_blks(inode, size);
> + start_blk += bytes_to_blks(inode, size);
> + }
>
> prep_next:
> cond_resched();
> --
> 2.32.0.432.gabb21c7263-goog
^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-07-23 7:49 [PATCH v3] f2fs: change fiemap way in printing compression chunk Daeho Jeong
2021-07-23 20:29 ` [f2fs-dev] " Eric Biggers
2021-07-24 1:19 ` Jaegeuk Kim
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