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Date: Thu, 23 Sep 2021 22:13:23 +0800 From: Chao Yu <chao@...nel.org> To: Gao Xiang <hsiangkao@...ux.alibaba.com>, linux-erofs@...ts.ozlabs.org Cc: LKML <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 2/2] erofs: clean up erofs_map_blocks tracepoints On 2021/9/21 22:35, Gao Xiang wrote: > Since the new type of chunk-based files is introduced, there is no > need to leave flatmode tracepoints. Rename to erofs_map_blocks. > > Add the missing FIEMAP tracepoint map flag as well. > > Signed-off-by: Gao Xiang <hsiangkao@...ux.alibaba.com> > --- > fs/erofs/data.c | 31 ++++++++++++++----------------- > include/trace/events/erofs.h | 7 ++++--- > 2 files changed, 18 insertions(+), 20 deletions(-) > > diff --git a/fs/erofs/data.c b/fs/erofs/data.c > index 9db8297..020c3e0 100644 > --- a/fs/erofs/data.c > +++ b/fs/erofs/data.c > @@ -26,14 +26,11 @@ 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; > > @@ -57,8 +54,7 @@ static int erofs_map_blocks_flatmode(struct inode *inode, > "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; > @@ -67,14 +63,10 @@ static int erofs_map_blocks_flatmode(struct inode *inode, > "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 +81,7 @@ static int erofs_map_blocks(struct inode *inode, > erofs_off_t pos; > int err = 0; > > + trace_erofs_map_blocks_enter(inode, map, flags); > if (map->m_la >= inode->i_size) { > /* leave out-of-bound access unmapped */ > map->m_flags = 0; > @@ -96,8 +89,10 @@ static int erofs_map_blocks(struct inode *inode, map->m_flags = 0; map->m_plen = 0; It needs to reset map->m_llen to zero here like we did after 'out' label before? Thanks, > 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 */ > @@ -109,9 +104,10 @@ 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)); > @@ -147,11 +143,12 @@ static int erofs_map_blocks(struct inode *inode, > map->m_flags = EROFS_MAP_MAPPED; > break; > } > + map->m_llen = map->m_plen; > out_unlock: > unlock_page(page); > put_page(page); > out: > - 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 db4f2ce..5c91edd 100644 > --- a/include/trace/events/erofs.h > +++ b/include/trace/events/erofs.h > @@ -19,7 +19,8 @@ > { 1, "DIR" }) > > #define show_map_flags(flags) __print_flags(flags, "|", \ > - { EROFS_GET_BLOCKS_RAW, "RAW" }) > + { EROFS_GET_BLOCKS_RAW, "RAW" }, \ > + { EROFS_GET_BLOCKS_FIEMAP, "FIEMAP" }) > > #define show_mflags(flags) __print_flags(flags, "", \ > { EROFS_MAP_MAPPED, "M" }, \ > @@ -169,7 +170,7 @@ > __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 +222,7 @@ > 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), > >
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