Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
ext4: add two trace points for moving extents
To facilitate tracking the length, type, and outcome of the move extent,
add a trace point at both the entry and exit of mext_move_extent().
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Message-ID: <20251013015128.499308-13-yi.zhang@huaweicloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
authored by
Zhang Yi
and committed by
Theodore Ts'o
9dbf9453
65097262
+86
-2
+12
-2
fs/ext4/move_extent.c
+12
-2
fs/ext4/move_extent.c
···
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#include "ext4.h"
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#include "ext4_extents.h"
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+
#include <trace/events/ext4.h>
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+
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struct mext_data {
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struct inode *orig_inode; /* Origin file inode */
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struct inode *donor_inode; /* Donor file inode */
···
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int ret, ret2;
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*m_len = 0;
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trace_ext4_move_extent_enter(orig_inode, orig_map, donor_inode,
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mext->donor_lblk);
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credits = ext4_chunk_trans_extent(orig_inode, 0) * 2;
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handle = ext4_journal_start(orig_inode, EXT4_HT_MOVE_EXTENTS, credits);
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-
if (IS_ERR(handle))
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-
return PTR_ERR(handle);
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if (IS_ERR(handle)) {
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ret = PTR_ERR(handle);
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goto out;
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}
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ret = mext_move_begin(mext, folio, &move_type);
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if (ret)
···
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mext_folio_double_unlock(folio);
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stop_handle:
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ext4_journal_stop(handle);
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out:
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trace_ext4_move_extent_exit(orig_inode, orig_map->m_lblk, donor_inode,
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mext->donor_lblk, orig_map->m_len, *m_len,
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move_type, ret);
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return ret;
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repair_branches:
+74
include/trace/events/ext4.h
+74
include/trace/events/ext4.h
···
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3016
__entry->fsblk, __entry->flags)
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3017
);
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3018
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+
TRACE_EVENT(ext4_move_extent_enter,
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TP_PROTO(struct inode *orig_inode, struct ext4_map_blocks *orig_map,
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struct inode *donor_inode, ext4_lblk_t donor_lblk),
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+
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TP_ARGS(orig_inode, orig_map, donor_inode, donor_lblk),
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+
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TP_STRUCT__entry(
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__field(dev_t, dev)
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__field(ino_t, orig_ino)
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__field(ext4_lblk_t, orig_lblk)
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__field(unsigned int, orig_flags)
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+
__field(ino_t, donor_ino)
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__field(ext4_lblk_t, donor_lblk)
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__field(unsigned int, len)
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),
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+
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TP_fast_assign(
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__entry->dev = orig_inode->i_sb->s_dev;
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__entry->orig_ino = orig_inode->i_ino;
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__entry->orig_lblk = orig_map->m_lblk;
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__entry->orig_flags = orig_map->m_flags;
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__entry->donor_ino = donor_inode->i_ino;
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__entry->donor_lblk = donor_lblk;
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__entry->len = orig_map->m_len;
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),
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+
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TP_printk("dev %d,%d origin ino %lu lblk %u flags %s donor ino %lu lblk %u len %u",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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(unsigned long) __entry->orig_ino, __entry->orig_lblk,
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show_mflags(__entry->orig_flags),
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(unsigned long) __entry->donor_ino, __entry->donor_lblk,
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__entry->len)
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);
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+
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TRACE_EVENT(ext4_move_extent_exit,
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TP_PROTO(struct inode *orig_inode, ext4_lblk_t orig_lblk,
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struct inode *donor_inode, ext4_lblk_t donor_lblk,
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unsigned int m_len, u64 move_len, int move_type, int ret),
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+
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TP_ARGS(orig_inode, orig_lblk, donor_inode, donor_lblk, m_len,
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move_len, move_type, ret),
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+
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TP_STRUCT__entry(
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__field(dev_t, dev)
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__field(ino_t, orig_ino)
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__field(ext4_lblk_t, orig_lblk)
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+
__field(ino_t, donor_ino)
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__field(ext4_lblk_t, donor_lblk)
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+
__field(unsigned int, m_len)
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__field(u64, move_len)
3069
+
__field(int, move_type)
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+
__field(int, ret)
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),
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+
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+
TP_fast_assign(
3074
+
__entry->dev = orig_inode->i_sb->s_dev;
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+
__entry->orig_ino = orig_inode->i_ino;
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+
__entry->orig_lblk = orig_lblk;
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+
__entry->donor_ino = donor_inode->i_ino;
3078
+
__entry->donor_lblk = donor_lblk;
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+
__entry->m_len = m_len;
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+
__entry->move_len = move_len;
3081
+
__entry->move_type = move_type;
3082
+
__entry->ret = ret;
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+
),
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+
3085
+
TP_printk("dev %d,%d origin ino %lu lblk %u donor ino %lu lblk %u m_len %u, move_len %llu type %d ret %d",
3086
+
MAJOR(__entry->dev), MINOR(__entry->dev),
3087
+
(unsigned long) __entry->orig_ino, __entry->orig_lblk,
3088
+
(unsigned long) __entry->donor_ino, __entry->donor_lblk,
3089
+
__entry->m_len, __entry->move_len, __entry->move_type,
3090
+
__entry->ret)
3091
+
);
3092
+
3019
3093
#endif /* _TRACE_EXT4_H */
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/* This part must be outside protection */