From: Gang He <ghe@suse.com> To: mfasheh@versity.com, jlbec@evilplan.org Cc: Gang He <ghe@suse.com>, linux-kernel@vger.kernel.org, ocfs2-devel@oss.oracle.com, akpm@linux-foundation.org Subject: [PATCH v3 2/3] ocfs2: add ocfs2_overwrite_io function Date: Thu, 28 Dec 2017 18:07:44 +0800 [thread overview] Message-ID: <1514455665-16325-3-git-send-email-ghe@suse.com> (raw) In-Reply-To: <1514455665-16325-1-git-send-email-ghe@suse.com> Add ocfs2_overwrite_io function, which is used to judge if overwrite allocated blocks, otherwise, the write will bring extra block allocation overhead. Signed-off-by: Gang He <ghe@suse.com> --- fs/ocfs2/extent_map.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ fs/ocfs2/extent_map.h | 3 +++ 2 files changed, 48 insertions(+) diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c index e4719e0..06cb964 100644 --- a/fs/ocfs2/extent_map.c +++ b/fs/ocfs2/extent_map.c @@ -38,6 +38,7 @@ #include "inode.h" #include "super.h" #include "symlink.h" +#include "aops.h" #include "ocfs2_trace.h" #include "buffer_head_io.h" @@ -832,6 +833,50 @@ int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, return ret; } +/* Is IO overwriting allocated blocks? */ +int ocfs2_overwrite_io(struct inode *inode, struct buffer_head *di_bh, + u64 map_start, u64 map_len) +{ + int ret = 0, is_last; + u32 mapping_end, cpos; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct ocfs2_extent_rec rec; + + if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { + if (ocfs2_size_fits_inline_data(di_bh, map_start + map_len)) + return ret; + else + return -EAGAIN; + } + + cpos = map_start >> osb->s_clustersize_bits; + mapping_end = ocfs2_clusters_for_bytes(inode->i_sb, + map_start + map_len); + is_last = 0; + while (cpos < mapping_end && !is_last) { + ret = ocfs2_get_clusters_nocache(inode, di_bh, cpos, + NULL, &rec, &is_last); + if (ret) { + mlog_errno(ret); + goto out; + } + + if (rec.e_blkno == 0ULL) + break; + + if (rec.e_flags & OCFS2_EXT_REFCOUNTED) + break; + + cpos = le32_to_cpu(rec.e_cpos) + + le16_to_cpu(rec.e_leaf_clusters); + } + + if (cpos < mapping_end) + ret = -EAGAIN; +out: + return ret; +} + int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int whence) { struct inode *inode = file->f_mapping->host; diff --git a/fs/ocfs2/extent_map.h b/fs/ocfs2/extent_map.h index 67ea57d..1057586 100644 --- a/fs/ocfs2/extent_map.h +++ b/fs/ocfs2/extent_map.h @@ -53,6 +53,9 @@ int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno, int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, u64 map_start, u64 map_len); +int ocfs2_overwrite_io(struct inode *inode, struct buffer_head *di_bh, + u64 map_start, u64 map_len); + int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin); int ocfs2_xattr_get_clusters(struct inode *inode, u32 v_cluster, -- 1.8.5.6
WARNING: multiple messages have this Message-ID (diff)
From: Gang He <ghe@suse.com> To: mfasheh@versity.com, jlbec@evilplan.org Cc: Gang He <ghe@suse.com>, linux-kernel@vger.kernel.org, ocfs2-devel@oss.oracle.com, akpm@linux-foundation.org Subject: [Ocfs2-devel] [PATCH v3 2/3] ocfs2: add ocfs2_overwrite_io function Date: Thu, 28 Dec 2017 18:07:44 +0800 [thread overview] Message-ID: <1514455665-16325-3-git-send-email-ghe@suse.com> (raw) In-Reply-To: <1514455665-16325-1-git-send-email-ghe@suse.com> Add ocfs2_overwrite_io function, which is used to judge if overwrite allocated blocks, otherwise, the write will bring extra block allocation overhead. Signed-off-by: Gang He <ghe@suse.com> --- fs/ocfs2/extent_map.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ fs/ocfs2/extent_map.h | 3 +++ 2 files changed, 48 insertions(+) diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c index e4719e0..06cb964 100644 --- a/fs/ocfs2/extent_map.c +++ b/fs/ocfs2/extent_map.c @@ -38,6 +38,7 @@ #include "inode.h" #include "super.h" #include "symlink.h" +#include "aops.h" #include "ocfs2_trace.h" #include "buffer_head_io.h" @@ -832,6 +833,50 @@ int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, return ret; } +/* Is IO overwriting allocated blocks? */ +int ocfs2_overwrite_io(struct inode *inode, struct buffer_head *di_bh, + u64 map_start, u64 map_len) +{ + int ret = 0, is_last; + u32 mapping_end, cpos; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct ocfs2_extent_rec rec; + + if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { + if (ocfs2_size_fits_inline_data(di_bh, map_start + map_len)) + return ret; + else + return -EAGAIN; + } + + cpos = map_start >> osb->s_clustersize_bits; + mapping_end = ocfs2_clusters_for_bytes(inode->i_sb, + map_start + map_len); + is_last = 0; + while (cpos < mapping_end && !is_last) { + ret = ocfs2_get_clusters_nocache(inode, di_bh, cpos, + NULL, &rec, &is_last); + if (ret) { + mlog_errno(ret); + goto out; + } + + if (rec.e_blkno == 0ULL) + break; + + if (rec.e_flags & OCFS2_EXT_REFCOUNTED) + break; + + cpos = le32_to_cpu(rec.e_cpos) + + le16_to_cpu(rec.e_leaf_clusters); + } + + if (cpos < mapping_end) + ret = -EAGAIN; +out: + return ret; +} + int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int whence) { struct inode *inode = file->f_mapping->host; diff --git a/fs/ocfs2/extent_map.h b/fs/ocfs2/extent_map.h index 67ea57d..1057586 100644 --- a/fs/ocfs2/extent_map.h +++ b/fs/ocfs2/extent_map.h @@ -53,6 +53,9 @@ int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno, int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, u64 map_start, u64 map_len); +int ocfs2_overwrite_io(struct inode *inode, struct buffer_head *di_bh, + u64 map_start, u64 map_len); + int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin); int ocfs2_xattr_get_clusters(struct inode *inode, u32 v_cluster, -- 1.8.5.6
next prev parent reply other threads:[~2017-12-28 10:08 UTC|newest] Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-12-28 10:07 [PATCH v3 0/3] ocfs2: add nowait aio support Gang He 2017-12-28 10:07 ` [Ocfs2-devel] " Gang He 2017-12-28 10:07 ` [PATCH v3 1/3] ocfs2: add ocfs2_try_rw_lock and ocfs2_try_inode_lock Gang He 2017-12-28 10:07 ` [Ocfs2-devel] " Gang He 2017-12-28 10:07 ` Gang He [this message] 2017-12-28 10:07 ` [Ocfs2-devel] [PATCH v3 2/3] ocfs2: add ocfs2_overwrite_io function Gang He 2018-01-02 11:00 ` alex chen 2018-01-02 11:00 ` alex chen 2018-01-03 5:14 ` Gang He 2018-01-03 5:14 ` Gang He 2018-01-04 1:10 ` alex chen 2018-01-04 1:10 ` alex chen 2018-01-04 3:32 ` Gang He 2018-01-04 3:32 ` Gang He 2018-01-11 1:59 ` alex chen 2018-01-11 1:59 ` alex chen 2017-12-28 10:07 ` [PATCH v3 3/3] ocfs2: nowait aio support Gang He 2017-12-28 10:07 ` [Ocfs2-devel] " Gang He 2018-01-11 2:19 ` alex chen 2018-01-11 2:19 ` alex chen 2018-01-11 3:23 ` Gang He 2018-01-11 3:23 ` Gang He
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