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Message-Id: <20211209012918.30337-1-hsiangkao@linux.alibaba.com>
Date: Thu, 9 Dec 2021 09:29:18 +0800
From: Gao Xiang <hsiangkao@...ux.alibaba.com>
To: linux-erofs@...ts.ozlabs.org, Chao Yu <chao@...nel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Gao Xiang <hsiangkao@...ux.alibaba.com>
Subject: [PATCH v2] erofs: clean up erofs_map_blocks tracepoints
Since the new type of chunk-based files is introduced, there is no
need to leave flatmode tracepoints.
Rename to erofs_map_blocks instead.
Signed-off-by: Gao Xiang <hsiangkao@...ux.alibaba.com>
---
v1: https://lore.kernel.org/r/20210921143531.81356-2-hsiangkao@linux.alibaba.com
change since v1:
- fix m_llen assignment issue pointed out by Chao;
fs/erofs/data.c | 39 ++++++++++++++++--------------------
include/trace/events/erofs.h | 4 ++--
2 files changed, 19 insertions(+), 24 deletions(-)
diff --git a/fs/erofs/data.c b/fs/erofs/data.c
index 0e35ef3f9f3d..4f98c76ec043 100644
--- a/fs/erofs/data.c
+++ b/fs/erofs/data.c
@@ -26,20 +26,16 @@ static int erofs_map_blocks_flatmode(struct inode *inode,
struct erofs_map_blocks *map,
int flags)
{
- int err = 0;
erofs_blk_t nblocks, lastblk;
u64 offset = map->m_la;
struct erofs_inode *vi = EROFS_I(inode);
bool tailendpacking = (vi->datalayout == EROFS_INODE_FLAT_INLINE);
- trace_erofs_map_blocks_flatmode_enter(inode, map, flags);
-
nblocks = DIV_ROUND_UP(inode->i_size, PAGE_SIZE);
lastblk = nblocks - tailendpacking;
/* there is no hole in flatmode */
map->m_flags = EROFS_MAP_MAPPED;
-
if (offset < blknr_to_addr(lastblk)) {
map->m_pa = blknr_to_addr(vi->raw_blkaddr) + map->m_la;
map->m_plen = blknr_to_addr(lastblk) - offset;
@@ -51,30 +47,23 @@ static int erofs_map_blocks_flatmode(struct inode *inode,
vi->xattr_isize + erofs_blkoff(map->m_la);
map->m_plen = inode->i_size - offset;
- /* inline data should be located in one meta block */
- if (erofs_blkoff(map->m_pa) + map->m_plen > PAGE_SIZE) {
+ /* inline data should be located in the same meta block */
+ if (erofs_blkoff(map->m_pa) + map->m_plen > EROFS_BLKSIZ) {
erofs_err(inode->i_sb,
"inline data cross block boundary @ nid %llu",
vi->nid);
DBG_BUGON(1);
- err = -EFSCORRUPTED;
- goto err_out;
+ return -EFSCORRUPTED;
}
-
map->m_flags |= EROFS_MAP_META;
} else {
erofs_err(inode->i_sb,
"internal error @ nid: %llu (size %llu), m_la 0x%llx",
vi->nid, inode->i_size, map->m_la);
DBG_BUGON(1);
- err = -EIO;
- goto err_out;
+ return -EIO;
}
-
- map->m_llen = map->m_plen;
-err_out:
- trace_erofs_map_blocks_flatmode_exit(inode, map, flags, 0);
- return err;
+ return 0;
}
static int erofs_map_blocks(struct inode *inode,
@@ -89,6 +78,7 @@ static int erofs_map_blocks(struct inode *inode,
erofs_off_t pos;
int err = 0;
+ trace_erofs_map_blocks_enter(inode, map, flags);
map->m_deviceid = 0;
if (map->m_la >= inode->i_size) {
/* leave out-of-bound access unmapped */
@@ -97,8 +87,10 @@ static int erofs_map_blocks(struct inode *inode,
goto out;
}
- if (vi->datalayout != EROFS_INODE_CHUNK_BASED)
- return erofs_map_blocks_flatmode(inode, map, flags);
+ if (vi->datalayout != EROFS_INODE_CHUNK_BASED) {
+ err = erofs_map_blocks_flatmode(inode, map, flags);
+ goto out;
+ }
if (vi->chunkformat & EROFS_CHUNK_FORMAT_INDEXES)
unit = sizeof(*idx); /* chunk index */
@@ -110,9 +102,10 @@ static int erofs_map_blocks(struct inode *inode,
vi->xattr_isize, unit) + unit * chunknr;
page = erofs_get_meta_page(inode->i_sb, erofs_blknr(pos));
- if (IS_ERR(page))
- return PTR_ERR(page);
-
+ if (IS_ERR(page)) {
+ err = PTR_ERR(page);
+ goto out;
+ }
map->m_la = chunknr << vi->chunkbits;
map->m_plen = min_t(erofs_off_t, 1UL << vi->chunkbits,
roundup(inode->i_size - map->m_la, EROFS_BLKSIZ));
@@ -146,7 +139,9 @@ static int erofs_map_blocks(struct inode *inode,
unlock_page(page);
put_page(page);
out:
- map->m_llen = map->m_plen;
+ if (!err)
+ map->m_llen = map->m_plen;
+ trace_erofs_map_blocks_exit(inode, map, flags, 0);
return err;
}
diff --git a/include/trace/events/erofs.h b/include/trace/events/erofs.h
index 16ae7b666810..57de057bd503 100644
--- a/include/trace/events/erofs.h
+++ b/include/trace/events/erofs.h
@@ -169,7 +169,7 @@ DECLARE_EVENT_CLASS(erofs__map_blocks_enter,
__entry->flags ? show_map_flags(__entry->flags) : "NULL")
);
-DEFINE_EVENT(erofs__map_blocks_enter, erofs_map_blocks_flatmode_enter,
+DEFINE_EVENT(erofs__map_blocks_enter, erofs_map_blocks_enter,
TP_PROTO(struct inode *inode, struct erofs_map_blocks *map,
unsigned flags),
@@ -221,7 +221,7 @@ DECLARE_EVENT_CLASS(erofs__map_blocks_exit,
show_mflags(__entry->mflags), __entry->ret)
);
-DEFINE_EVENT(erofs__map_blocks_exit, erofs_map_blocks_flatmode_exit,
+DEFINE_EVENT(erofs__map_blocks_exit, erofs_map_blocks_exit,
TP_PROTO(struct inode *inode, struct erofs_map_blocks *map,
unsigned flags, int ret),
--
2.24.4
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