diff options
| -rw-r--r-- | fs/locks.c | 11 | ||||
| -rw-r--r-- | include/trace/events/filelock.h | 96 |
2 files changed, 107 insertions, 0 deletions
diff --git a/fs/locks.c b/fs/locks.c index facf76d9fcb..da57c9b7e84 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -130,6 +130,9 @@ #include <linux/percpu.h> #include <linux/lglock.h> +#define CREATE_TRACE_POINTS +#include <trace/events/filelock.h> + #include <asm/uaccess.h> #define IS_POSIX(fl) (fl->fl_flags & FL_POSIX) @@ -1287,6 +1290,7 @@ static void time_out_leases(struct inode *inode) before = &inode->i_flock; while ((fl = *before) && IS_LEASE(fl) && lease_breaking(fl)) { + trace_time_out_leases(inode, fl); if (past_time(fl->fl_downgrade_time)) lease_modify(before, F_RDLCK); if (past_time(fl->fl_break_time)) @@ -1374,6 +1378,7 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type) } if (i_have_this_lease || (mode & O_NONBLOCK)) { + trace_break_lease_noblock(inode, new_fl); error = -EWOULDBLOCK; goto out; } @@ -1385,10 +1390,12 @@ restart: if (break_time == 0) break_time++; locks_insert_block(flock, new_fl); + trace_break_lease_block(inode, new_fl); spin_unlock(&inode->i_lock); error = wait_event_interruptible_timeout(new_fl->fl_wait, !new_fl->fl_next, break_time); spin_lock(&inode->i_lock); + trace_break_lease_unblock(inode, new_fl); locks_delete_block(new_fl); if (error >= 0) { if (error == 0) @@ -1510,6 +1517,8 @@ static int generic_add_lease(struct file *filp, long arg, struct file_lock **flp int error; lease = *flp; + trace_generic_add_lease(inode, lease); + /* * In the delegation case we need mutual exclusion with * a number of operations that take the i_mutex. We trylock @@ -1599,6 +1608,8 @@ static int generic_delete_lease(struct file *filp, struct file_lock **flp) struct dentry *dentry = filp->f_path.dentry; struct inode *inode = dentry->d_inode; + trace_generic_delete_lease(inode, *flp); + for (before = &inode->i_flock; ((fl = *before) != NULL) && IS_LEASE(fl); before = &fl->fl_next) { diff --git a/include/trace/events/filelock.h b/include/trace/events/filelock.h new file mode 100644 index 00000000000..59d11c22f07 --- /dev/null +++ b/include/trace/events/filelock.h @@ -0,0 +1,96 @@ +/* + * Events for filesystem locks + * + * Copyright 2013 Jeff Layton <jlayton@poochiereds.net> + */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM filelock + +#if !defined(_TRACE_FILELOCK_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_FILELOCK_H + +#include <linux/tracepoint.h> +#include <linux/fs.h> +#include <linux/device.h> +#include <linux/kdev_t.h> + +#define show_fl_flags(val) \ + __print_flags(val, "|", \ + { FL_POSIX, "FL_POSIX" }, \ + { FL_FLOCK, "FL_FLOCK" }, \ + { FL_DELEG, "FL_DELEG" }, \ + { FL_ACCESS, "FL_ACCESS" }, \ + { FL_EXISTS, "FL_EXISTS" }, \ + { FL_LEASE, "FL_LEASE" }, \ + { FL_CLOSE, "FL_CLOSE" }, \ + { FL_SLEEP, "FL_SLEEP" }, \ + { FL_DOWNGRADE_PENDING, "FL_DOWNGRADE_PENDING" }, \ + { FL_UNLOCK_PENDING, "FL_UNLOCK_PENDING" }, \ + { FL_OFDLCK, "FL_OFDLCK" }) + +#define show_fl_type(val) \ + __print_symbolic(val, \ + { F_RDLCK, "F_RDLCK" }, \ + { F_WRLCK, "F_WRLCK" }, \ + { F_UNLCK, "F_UNLCK" }) + +DECLARE_EVENT_CLASS(filelock_lease, + + TP_PROTO(struct inode *inode, struct file_lock *fl), + + TP_ARGS(inode, fl), + + TP_STRUCT__entry( + __field(struct file_lock *, fl) + __field(unsigned long, i_ino) + __field(dev_t, s_dev) + __field(struct file_lock *, fl_next) + __field(fl_owner_t, fl_owner) + __field(unsigned int, fl_flags) + __field(unsigned char, fl_type) + __field(unsigned long, fl_break_time) + __field(unsigned long, fl_downgrade_time) + ), + + TP_fast_assign( + __entry->fl = fl; + __entry->s_dev = inode->i_sb->s_dev; + __entry->i_ino = inode->i_ino; + __entry->fl_next = fl->fl_next; + __entry->fl_owner = fl->fl_owner; + __entry->fl_flags = fl->fl_flags; + __entry->fl_type = fl->fl_type; + __entry->fl_break_time = fl->fl_break_time; + __entry->fl_downgrade_time = fl->fl_downgrade_time; + ), + + TP_printk("fl=0x%p dev=0x%x:0x%x ino=0x%lx fl_next=0x%p fl_owner=0x%p fl_flags=%s fl_type=%s fl_break_time=%lu fl_downgrade_time=%lu", + __entry->fl, MAJOR(__entry->s_dev), MINOR(__entry->s_dev), + __entry->i_ino, __entry->fl_next, __entry->fl_owner, + show_fl_flags(__entry->fl_flags), + show_fl_type(__entry->fl_type), + __entry->fl_break_time, __entry->fl_downgrade_time) +); + +DEFINE_EVENT(filelock_lease, break_lease_noblock, TP_PROTO(struct inode *inode, struct file_lock *fl), + TP_ARGS(inode, fl)); + +DEFINE_EVENT(filelock_lease, break_lease_block, TP_PROTO(struct inode *inode, struct file_lock *fl), + TP_ARGS(inode, fl)); + +DEFINE_EVENT(filelock_lease, break_lease_unblock, TP_PROTO(struct inode *inode, struct file_lock *fl), + TP_ARGS(inode, fl)); + +DEFINE_EVENT(filelock_lease, generic_add_lease, TP_PROTO(struct inode *inode, struct file_lock *fl), + TP_ARGS(inode, fl)); + +DEFINE_EVENT(filelock_lease, generic_delete_lease, TP_PROTO(struct inode *inode, struct file_lock *fl), + TP_ARGS(inode, fl)); + +DEFINE_EVENT(filelock_lease, time_out_leases, TP_PROTO(struct inode *inode, struct file_lock *fl), + TP_ARGS(inode, fl)); + +#endif /* _TRACE_FILELOCK_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h> |