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ada5c1da86
struct file lock contains an 'fl_next' pointer which is used to point to the lock that this request is blocked waiting for. So rename it to fl_blocker. The fl_blocked list_head in an active lock is the head of a list of blocked requests. In a request it is a node in that list. These are two distinct uses, so replace with two list_heads with different names. fl_blocked_requests is the head of a list of blocked requests fl_blocked_member is a node in a member of that list. The two different list_heads are never used at the same time, but that will change in a future patch. Note that a tracepoint is changed to report fl_blocker instead of fl_next. Signed-off-by: NeilBrown <neilb@suse.com> Reviewed-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Jeff Layton <jlayton@kernel.org>
210 lines
6.4 KiB
C
210 lines
6.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Events for filesystem locks
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*
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* Copyright 2013 Jeff Layton <jlayton@poochiereds.net>
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM filelock
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#if !defined(_TRACE_FILELOCK_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_FILELOCK_H
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#include <linux/tracepoint.h>
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#include <linux/fs.h>
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#include <linux/device.h>
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#include <linux/kdev_t.h>
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#define show_fl_flags(val) \
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__print_flags(val, "|", \
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{ FL_POSIX, "FL_POSIX" }, \
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{ FL_FLOCK, "FL_FLOCK" }, \
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{ FL_DELEG, "FL_DELEG" }, \
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{ FL_ACCESS, "FL_ACCESS" }, \
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{ FL_EXISTS, "FL_EXISTS" }, \
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{ FL_LEASE, "FL_LEASE" }, \
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{ FL_CLOSE, "FL_CLOSE" }, \
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{ FL_SLEEP, "FL_SLEEP" }, \
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{ FL_DOWNGRADE_PENDING, "FL_DOWNGRADE_PENDING" }, \
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{ FL_UNLOCK_PENDING, "FL_UNLOCK_PENDING" }, \
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{ FL_OFDLCK, "FL_OFDLCK" })
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#define show_fl_type(val) \
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__print_symbolic(val, \
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{ F_RDLCK, "F_RDLCK" }, \
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{ F_WRLCK, "F_WRLCK" }, \
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{ F_UNLCK, "F_UNLCK" })
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TRACE_EVENT(locks_get_lock_context,
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TP_PROTO(struct inode *inode, int type, struct file_lock_context *ctx),
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TP_ARGS(inode, type, ctx),
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TP_STRUCT__entry(
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__field(unsigned long, i_ino)
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__field(dev_t, s_dev)
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__field(unsigned char, type)
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__field(struct file_lock_context *, ctx)
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),
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TP_fast_assign(
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__entry->s_dev = inode->i_sb->s_dev;
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__entry->i_ino = inode->i_ino;
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__entry->type = type;
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__entry->ctx = ctx;
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),
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TP_printk("dev=0x%x:0x%x ino=0x%lx type=%s ctx=%p",
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MAJOR(__entry->s_dev), MINOR(__entry->s_dev),
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__entry->i_ino, show_fl_type(__entry->type), __entry->ctx)
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);
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DECLARE_EVENT_CLASS(filelock_lock,
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TP_PROTO(struct inode *inode, struct file_lock *fl, int ret),
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TP_ARGS(inode, fl, ret),
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TP_STRUCT__entry(
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__field(struct file_lock *, fl)
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__field(unsigned long, i_ino)
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__field(dev_t, s_dev)
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__field(struct file_lock *, fl_blocker)
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__field(fl_owner_t, fl_owner)
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__field(unsigned int, fl_pid)
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__field(unsigned int, fl_flags)
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__field(unsigned char, fl_type)
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__field(loff_t, fl_start)
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__field(loff_t, fl_end)
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__field(int, ret)
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),
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TP_fast_assign(
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__entry->fl = fl ? fl : NULL;
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__entry->s_dev = inode->i_sb->s_dev;
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__entry->i_ino = inode->i_ino;
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__entry->fl_blocker = fl ? fl->fl_blocker : NULL;
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__entry->fl_owner = fl ? fl->fl_owner : NULL;
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__entry->fl_pid = fl ? fl->fl_pid : 0;
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__entry->fl_flags = fl ? fl->fl_flags : 0;
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__entry->fl_type = fl ? fl->fl_type : 0;
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__entry->fl_start = fl ? fl->fl_start : 0;
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__entry->fl_end = fl ? fl->fl_end : 0;
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__entry->ret = ret;
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),
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TP_printk("fl=0x%p dev=0x%x:0x%x ino=0x%lx fl_blocker=0x%p fl_owner=0x%p fl_pid=%u fl_flags=%s fl_type=%s fl_start=%lld fl_end=%lld ret=%d",
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__entry->fl, MAJOR(__entry->s_dev), MINOR(__entry->s_dev),
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__entry->i_ino, __entry->fl_blocker, __entry->fl_owner,
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__entry->fl_pid, show_fl_flags(__entry->fl_flags),
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show_fl_type(__entry->fl_type),
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__entry->fl_start, __entry->fl_end, __entry->ret)
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);
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DEFINE_EVENT(filelock_lock, posix_lock_inode,
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TP_PROTO(struct inode *inode, struct file_lock *fl, int ret),
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TP_ARGS(inode, fl, ret));
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DEFINE_EVENT(filelock_lock, fcntl_setlk,
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TP_PROTO(struct inode *inode, struct file_lock *fl, int ret),
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TP_ARGS(inode, fl, ret));
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DEFINE_EVENT(filelock_lock, locks_remove_posix,
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TP_PROTO(struct inode *inode, struct file_lock *fl, int ret),
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TP_ARGS(inode, fl, ret));
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DEFINE_EVENT(filelock_lock, flock_lock_inode,
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TP_PROTO(struct inode *inode, struct file_lock *fl, int ret),
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TP_ARGS(inode, fl, ret));
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DECLARE_EVENT_CLASS(filelock_lease,
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TP_PROTO(struct inode *inode, struct file_lock *fl),
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TP_ARGS(inode, fl),
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TP_STRUCT__entry(
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__field(struct file_lock *, fl)
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__field(unsigned long, i_ino)
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__field(dev_t, s_dev)
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__field(struct file_lock *, fl_blocker)
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__field(fl_owner_t, fl_owner)
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__field(unsigned int, fl_flags)
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__field(unsigned char, fl_type)
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__field(unsigned long, fl_break_time)
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__field(unsigned long, fl_downgrade_time)
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),
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TP_fast_assign(
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__entry->fl = fl ? fl : NULL;
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__entry->s_dev = inode->i_sb->s_dev;
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__entry->i_ino = inode->i_ino;
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__entry->fl_blocker = fl ? fl->fl_blocker : NULL;
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__entry->fl_owner = fl ? fl->fl_owner : NULL;
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__entry->fl_flags = fl ? fl->fl_flags : 0;
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__entry->fl_type = fl ? fl->fl_type : 0;
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__entry->fl_break_time = fl ? fl->fl_break_time : 0;
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__entry->fl_downgrade_time = fl ? fl->fl_downgrade_time : 0;
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),
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TP_printk("fl=0x%p dev=0x%x:0x%x ino=0x%lx fl_blocker=0x%p fl_owner=0x%p fl_flags=%s fl_type=%s fl_break_time=%lu fl_downgrade_time=%lu",
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__entry->fl, MAJOR(__entry->s_dev), MINOR(__entry->s_dev),
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__entry->i_ino, __entry->fl_blocker, __entry->fl_owner,
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show_fl_flags(__entry->fl_flags),
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show_fl_type(__entry->fl_type),
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__entry->fl_break_time, __entry->fl_downgrade_time)
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);
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DEFINE_EVENT(filelock_lease, break_lease_noblock, TP_PROTO(struct inode *inode, struct file_lock *fl),
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TP_ARGS(inode, fl));
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DEFINE_EVENT(filelock_lease, break_lease_block, TP_PROTO(struct inode *inode, struct file_lock *fl),
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TP_ARGS(inode, fl));
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DEFINE_EVENT(filelock_lease, break_lease_unblock, TP_PROTO(struct inode *inode, struct file_lock *fl),
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TP_ARGS(inode, fl));
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DEFINE_EVENT(filelock_lease, generic_delete_lease, TP_PROTO(struct inode *inode, struct file_lock *fl),
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TP_ARGS(inode, fl));
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DEFINE_EVENT(filelock_lease, time_out_leases, TP_PROTO(struct inode *inode, struct file_lock *fl),
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TP_ARGS(inode, fl));
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TRACE_EVENT(generic_add_lease,
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TP_PROTO(struct inode *inode, struct file_lock *fl),
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TP_ARGS(inode, fl),
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TP_STRUCT__entry(
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__field(unsigned long, i_ino)
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__field(int, wcount)
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__field(int, dcount)
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__field(int, icount)
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__field(dev_t, s_dev)
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__field(fl_owner_t, fl_owner)
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__field(unsigned int, fl_flags)
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__field(unsigned char, fl_type)
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),
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TP_fast_assign(
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__entry->s_dev = inode->i_sb->s_dev;
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__entry->i_ino = inode->i_ino;
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__entry->wcount = atomic_read(&inode->i_writecount);
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__entry->dcount = d_count(fl->fl_file->f_path.dentry);
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__entry->icount = atomic_read(&inode->i_count);
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__entry->fl_owner = fl ? fl->fl_owner : NULL;
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__entry->fl_flags = fl ? fl->fl_flags : 0;
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__entry->fl_type = fl ? fl->fl_type : 0;
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),
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TP_printk("dev=0x%x:0x%x ino=0x%lx wcount=%d dcount=%d icount=%d fl_owner=0x%p fl_flags=%s fl_type=%s",
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MAJOR(__entry->s_dev), MINOR(__entry->s_dev),
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__entry->i_ino, __entry->wcount, __entry->dcount,
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__entry->icount, __entry->fl_owner,
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show_fl_flags(__entry->fl_flags),
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show_fl_type(__entry->fl_type))
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);
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#endif /* _TRACE_FILELOCK_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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