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linux/include/trace/events/cachefiles.h
David Howells 32e150037d fscache, cachefiles: Store the volume coherency data 
Store the volume coherency data in an xattr and check it when we rebind the
volume.  If it doesn't match the cache volume is moved to the graveyard and
rebuilt anew.

Changes
=======
ver #4:
 - Remove a couple of debugging prints.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Link: https://lore.kernel.org/r/163967164397.1823006.2950539849831291830.stgit@warthog.procyon.org.uk/ # v3
Link: https://lore.kernel.org/r/164021563138.640689.15851092065380543119.stgit@warthog.procyon.org.uk/ # v4
2022-01-07 13:43:03 +00:00

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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* CacheFiles tracepoints
*
* Copyright (C) 2021 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM cachefiles
#if !defined(_TRACE_CACHEFILES_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_CACHEFILES_H
#include <linux/tracepoint.h>
/*
* Define enums for tracing information.
*/
#ifndef __CACHEFILES_DECLARE_TRACE_ENUMS_ONCE_ONLY
#define __CACHEFILES_DECLARE_TRACE_ENUMS_ONCE_ONLY
enum cachefiles_obj_ref_trace {
cachefiles_obj_get_ioreq,
cachefiles_obj_new,
cachefiles_obj_put_alloc_fail,
cachefiles_obj_put_detach,
cachefiles_obj_put_ioreq,
cachefiles_obj_see_clean_commit,
cachefiles_obj_see_clean_delete,
cachefiles_obj_see_clean_drop_tmp,
cachefiles_obj_see_lookup_cookie,
cachefiles_obj_see_lookup_failed,
cachefiles_obj_see_withdraw_cookie,
cachefiles_obj_see_withdrawal,
};
enum fscache_why_object_killed {
FSCACHE_OBJECT_IS_STALE,
FSCACHE_OBJECT_IS_WEIRD,
FSCACHE_OBJECT_INVALIDATED,
FSCACHE_OBJECT_NO_SPACE,
FSCACHE_OBJECT_WAS_RETIRED,
FSCACHE_OBJECT_WAS_CULLED,
FSCACHE_VOLUME_IS_WEIRD,
};
enum cachefiles_coherency_trace {
cachefiles_coherency_check_aux,
cachefiles_coherency_check_content,
cachefiles_coherency_check_dirty,
cachefiles_coherency_check_len,
cachefiles_coherency_check_objsize,
cachefiles_coherency_check_ok,
cachefiles_coherency_check_type,
cachefiles_coherency_check_xattr,
cachefiles_coherency_set_fail,
cachefiles_coherency_set_ok,
cachefiles_coherency_vol_check_cmp,
cachefiles_coherency_vol_check_ok,
cachefiles_coherency_vol_check_xattr,
cachefiles_coherency_vol_set_fail,
cachefiles_coherency_vol_set_ok,
};
enum cachefiles_trunc_trace {
cachefiles_trunc_dio_adjust,
cachefiles_trunc_expand_tmpfile,
cachefiles_trunc_shrink,
};
enum cachefiles_prepare_read_trace {
cachefiles_trace_read_after_eof,
cachefiles_trace_read_found_hole,
cachefiles_trace_read_found_part,
cachefiles_trace_read_have_data,
cachefiles_trace_read_no_data,
cachefiles_trace_read_no_file,
cachefiles_trace_read_seek_error,
cachefiles_trace_read_seek_nxio,
};
enum cachefiles_error_trace {
cachefiles_trace_fallocate_error,
cachefiles_trace_getxattr_error,
cachefiles_trace_link_error,
cachefiles_trace_lookup_error,
cachefiles_trace_mkdir_error,
cachefiles_trace_notify_change_error,
cachefiles_trace_open_error,
cachefiles_trace_read_error,
cachefiles_trace_remxattr_error,
cachefiles_trace_rename_error,
cachefiles_trace_seek_error,
cachefiles_trace_setxattr_error,
cachefiles_trace_statfs_error,
cachefiles_trace_tmpfile_error,
cachefiles_trace_trunc_error,
cachefiles_trace_unlink_error,
cachefiles_trace_write_error,
};
#endif
/*
* Define enum -> string mappings for display.
*/
#define cachefiles_obj_kill_traces \
EM(FSCACHE_OBJECT_IS_STALE, "stale") \
EM(FSCACHE_OBJECT_IS_WEIRD, "weird") \
EM(FSCACHE_OBJECT_INVALIDATED, "inval") \
EM(FSCACHE_OBJECT_NO_SPACE, "no_space") \
EM(FSCACHE_OBJECT_WAS_RETIRED, "was_retired") \
EM(FSCACHE_OBJECT_WAS_CULLED, "was_culled") \
E_(FSCACHE_VOLUME_IS_WEIRD, "volume_weird")
#define cachefiles_obj_ref_traces \
EM(cachefiles_obj_get_ioreq, "GET ioreq") \
EM(cachefiles_obj_new, "NEW obj") \
EM(cachefiles_obj_put_alloc_fail, "PUT alloc_fail") \
EM(cachefiles_obj_put_detach, "PUT detach") \
EM(cachefiles_obj_put_ioreq, "PUT ioreq") \
EM(cachefiles_obj_see_clean_commit, "SEE clean_commit") \
EM(cachefiles_obj_see_clean_delete, "SEE clean_delete") \
EM(cachefiles_obj_see_clean_drop_tmp, "SEE clean_drop_tmp") \
EM(cachefiles_obj_see_lookup_cookie, "SEE lookup_cookie") \
EM(cachefiles_obj_see_lookup_failed, "SEE lookup_failed") \
EM(cachefiles_obj_see_withdraw_cookie, "SEE withdraw_cookie") \
E_(cachefiles_obj_see_withdrawal, "SEE withdrawal")
#define cachefiles_coherency_traces \
EM(cachefiles_coherency_check_aux, "BAD aux ") \
EM(cachefiles_coherency_check_content, "BAD cont") \
EM(cachefiles_coherency_check_dirty, "BAD dirt") \
EM(cachefiles_coherency_check_len, "BAD len ") \
EM(cachefiles_coherency_check_objsize, "BAD osiz") \
EM(cachefiles_coherency_check_ok, "OK ") \
EM(cachefiles_coherency_check_type, "BAD type") \
EM(cachefiles_coherency_check_xattr, "BAD xatt") \
EM(cachefiles_coherency_set_fail, "SET fail") \
EM(cachefiles_coherency_set_ok, "SET ok ") \
EM(cachefiles_coherency_vol_check_cmp, "VOL BAD cmp ") \
EM(cachefiles_coherency_vol_check_ok, "VOL OK ") \
EM(cachefiles_coherency_vol_check_xattr,"VOL BAD xatt") \
EM(cachefiles_coherency_vol_set_fail, "VOL SET fail") \
E_(cachefiles_coherency_vol_set_ok, "VOL SET ok ")
#define cachefiles_trunc_traces \
EM(cachefiles_trunc_dio_adjust, "DIOADJ") \
EM(cachefiles_trunc_expand_tmpfile, "EXPTMP") \
E_(cachefiles_trunc_shrink, "SHRINK")
#define cachefiles_prepare_read_traces \
EM(cachefiles_trace_read_after_eof, "after-eof ") \
EM(cachefiles_trace_read_found_hole, "found-hole") \
EM(cachefiles_trace_read_found_part, "found-part") \
EM(cachefiles_trace_read_have_data, "have-data ") \
EM(cachefiles_trace_read_no_data, "no-data ") \
EM(cachefiles_trace_read_no_file, "no-file ") \
EM(cachefiles_trace_read_seek_error, "seek-error") \
E_(cachefiles_trace_read_seek_nxio, "seek-enxio")
#define cachefiles_error_traces \
EM(cachefiles_trace_fallocate_error, "fallocate") \
EM(cachefiles_trace_getxattr_error, "getxattr") \
EM(cachefiles_trace_link_error, "link") \
EM(cachefiles_trace_lookup_error, "lookup") \
EM(cachefiles_trace_mkdir_error, "mkdir") \
EM(cachefiles_trace_notify_change_error, "notify_change") \
EM(cachefiles_trace_open_error, "open") \
EM(cachefiles_trace_read_error, "read") \
EM(cachefiles_trace_remxattr_error, "remxattr") \
EM(cachefiles_trace_rename_error, "rename") \
EM(cachefiles_trace_seek_error, "seek") \
EM(cachefiles_trace_setxattr_error, "setxattr") \
EM(cachefiles_trace_statfs_error, "statfs") \
EM(cachefiles_trace_tmpfile_error, "tmpfile") \
EM(cachefiles_trace_trunc_error, "trunc") \
EM(cachefiles_trace_unlink_error, "unlink") \
E_(cachefiles_trace_write_error, "write")
/*
* Export enum symbols via userspace.
*/
#undef EM
#undef E_
#define EM(a, b) TRACE_DEFINE_ENUM(a);
#define E_(a, b) TRACE_DEFINE_ENUM(a);
cachefiles_obj_kill_traces;
cachefiles_obj_ref_traces;
cachefiles_coherency_traces;
cachefiles_trunc_traces;
cachefiles_prepare_read_traces;
cachefiles_error_traces;
/*
* Now redefine the EM() and E_() macros to map the enums to the strings that
* will be printed in the output.
*/
#undef EM
#undef E_
#define EM(a, b) { a, b },
#define E_(a, b) { a, b }
TRACE_EVENT(cachefiles_ref,
TP_PROTO(unsigned int object_debug_id,
unsigned int cookie_debug_id,
int usage,
enum cachefiles_obj_ref_trace why),
TP_ARGS(object_debug_id, cookie_debug_id, usage, why),
/* Note that obj may be NULL */
TP_STRUCT__entry(
__field(unsigned int, obj )
__field(unsigned int, cookie )
__field(enum cachefiles_obj_ref_trace, why )
__field(int, usage )
),
TP_fast_assign(
__entry->obj = object_debug_id;
__entry->cookie = cookie_debug_id;
__entry->usage = usage;
__entry->why = why;
),
TP_printk("c=%08x o=%08x u=%d %s",
__entry->cookie, __entry->obj, __entry->usage,
__print_symbolic(__entry->why, cachefiles_obj_ref_traces))
);
TRACE_EVENT(cachefiles_lookup,
TP_PROTO(struct cachefiles_object *obj,
struct dentry *de),
TP_ARGS(obj, de),
TP_STRUCT__entry(
__field(unsigned int, obj )
__field(short, error )
__field(unsigned long, ino )
),
TP_fast_assign(
__entry->obj = obj->debug_id;
__entry->ino = (!IS_ERR(de) && d_backing_inode(de) ?
d_backing_inode(de)->i_ino : 0);
__entry->error = IS_ERR(de) ? PTR_ERR(de) : 0;
),
TP_printk("o=%08x i=%lx e=%d",
__entry->obj, __entry->ino, __entry->error)
);
TRACE_EVENT(cachefiles_tmpfile,
TP_PROTO(struct cachefiles_object *obj, struct inode *backer),
TP_ARGS(obj, backer),
TP_STRUCT__entry(
__field(unsigned int, obj )
__field(unsigned int, backer )
),
TP_fast_assign(
__entry->obj = obj->debug_id;
__entry->backer = backer->i_ino;
),
TP_printk("o=%08x b=%08x",
__entry->obj,
__entry->backer)
);
TRACE_EVENT(cachefiles_link,
TP_PROTO(struct cachefiles_object *obj, struct inode *backer),
TP_ARGS(obj, backer),
TP_STRUCT__entry(
__field(unsigned int, obj )
__field(unsigned int, backer )
),
TP_fast_assign(
__entry->obj = obj->debug_id;
__entry->backer = backer->i_ino;
),
TP_printk("o=%08x b=%08x",
__entry->obj,
__entry->backer)
);
TRACE_EVENT(cachefiles_unlink,
TP_PROTO(struct cachefiles_object *obj,
struct dentry *de,
enum fscache_why_object_killed why),
TP_ARGS(obj, de, why),
/* Note that obj may be NULL */
TP_STRUCT__entry(
__field(unsigned int, obj )
__field(struct dentry *, de )
__field(enum fscache_why_object_killed, why )
),
TP_fast_assign(
__entry->obj = obj ? obj->debug_id : UINT_MAX;
__entry->de = de;
__entry->why = why;
),
TP_printk("o=%08x d=%p w=%s",
__entry->obj, __entry->de,
__print_symbolic(__entry->why, cachefiles_obj_kill_traces))
);
TRACE_EVENT(cachefiles_rename,
TP_PROTO(struct cachefiles_object *obj,
struct dentry *de,
struct dentry *to,
enum fscache_why_object_killed why),
TP_ARGS(obj, de, to, why),
/* Note that obj may be NULL */
TP_STRUCT__entry(
__field(unsigned int, obj )
__field(struct dentry *, de )
__field(struct dentry *, to )
__field(enum fscache_why_object_killed, why )
),
TP_fast_assign(
__entry->obj = obj ? obj->debug_id : UINT_MAX;
__entry->de = de;
__entry->to = to;
__entry->why = why;
),
TP_printk("o=%08x d=%p t=%p w=%s",
__entry->obj, __entry->de, __entry->to,
__print_symbolic(__entry->why, cachefiles_obj_kill_traces))
);
TRACE_EVENT(cachefiles_coherency,
TP_PROTO(struct cachefiles_object *obj,
ino_t ino,
enum cachefiles_content content,
enum cachefiles_coherency_trace why),
TP_ARGS(obj, ino, content, why),
/* Note that obj may be NULL */
TP_STRUCT__entry(
__field(unsigned int, obj )
__field(enum cachefiles_coherency_trace, why )
__field(enum cachefiles_content, content )
__field(u64, ino )
),
TP_fast_assign(
__entry->obj = obj->debug_id;
__entry->why = why;
__entry->content = content;
__entry->ino = ino;
),
TP_printk("o=%08x %s i=%llx c=%u",
__entry->obj,
__print_symbolic(__entry->why, cachefiles_coherency_traces),
__entry->ino,
__entry->content)
);
TRACE_EVENT(cachefiles_vol_coherency,
TP_PROTO(struct cachefiles_volume *volume,
ino_t ino,
enum cachefiles_coherency_trace why),
TP_ARGS(volume, ino, why),
/* Note that obj may be NULL */
TP_STRUCT__entry(
__field(unsigned int, vol )
__field(enum cachefiles_coherency_trace, why )
__field(u64, ino )
),
TP_fast_assign(
__entry->vol = volume->vcookie->debug_id;
__entry->why = why;
__entry->ino = ino;
),
TP_printk("V=%08x %s i=%llx",
__entry->vol,
__print_symbolic(__entry->why, cachefiles_coherency_traces),
__entry->ino)
);
TRACE_EVENT(cachefiles_prep_read,
TP_PROTO(struct netfs_read_subrequest *sreq,
enum netfs_read_source source,
enum cachefiles_prepare_read_trace why,
ino_t cache_inode),
TP_ARGS(sreq, source, why, cache_inode),
TP_STRUCT__entry(
__field(unsigned int, rreq )
__field(unsigned short, index )
__field(unsigned short, flags )
__field(enum netfs_read_source, source )
__field(enum cachefiles_prepare_read_trace, why )
__field(size_t, len )
__field(loff_t, start )
__field(unsigned int, netfs_inode )
__field(unsigned int, cache_inode )
),
TP_fast_assign(
__entry->rreq = sreq->rreq->debug_id;
__entry->index = sreq->debug_index;
__entry->flags = sreq->flags;
__entry->source = source;
__entry->why = why;
__entry->len = sreq->len;
__entry->start = sreq->start;
__entry->netfs_inode = sreq->rreq->inode->i_ino;
__entry->cache_inode = cache_inode;
),
TP_printk("R=%08x[%u] %s %s f=%02x s=%llx %zx ni=%x b=%x",
__entry->rreq, __entry->index,
__print_symbolic(__entry->source, netfs_sreq_sources),
__print_symbolic(__entry->why, cachefiles_prepare_read_traces),
__entry->flags,
__entry->start, __entry->len,
__entry->netfs_inode, __entry->cache_inode)
);
TRACE_EVENT(cachefiles_read,
TP_PROTO(struct cachefiles_object *obj,
struct inode *backer,
loff_t start,
size_t len),
TP_ARGS(obj, backer, start, len),
TP_STRUCT__entry(
__field(unsigned int, obj )
__field(unsigned int, backer )
__field(size_t, len )
__field(loff_t, start )
),
TP_fast_assign(
__entry->obj = obj->debug_id;
__entry->backer = backer->i_ino;
__entry->start = start;
__entry->len = len;
),
TP_printk("o=%08x b=%08x s=%llx l=%zx",
__entry->obj,
__entry->backer,
__entry->start,
__entry->len)
);
TRACE_EVENT(cachefiles_write,
TP_PROTO(struct cachefiles_object *obj,
struct inode *backer,
loff_t start,
size_t len),
TP_ARGS(obj, backer, start, len),
TP_STRUCT__entry(
__field(unsigned int, obj )
__field(unsigned int, backer )
__field(size_t, len )
__field(loff_t, start )
),
TP_fast_assign(
__entry->obj = obj->debug_id;
__entry->backer = backer->i_ino;
__entry->start = start;
__entry->len = len;
),
TP_printk("o=%08x b=%08x s=%llx l=%zx",
__entry->obj,
__entry->backer,
__entry->start,
__entry->len)
);
TRACE_EVENT(cachefiles_trunc,
TP_PROTO(struct cachefiles_object *obj, struct inode *backer,
loff_t from, loff_t to, enum cachefiles_trunc_trace why),
TP_ARGS(obj, backer, from, to, why),
TP_STRUCT__entry(
__field(unsigned int, obj )
__field(unsigned int, backer )
__field(enum cachefiles_trunc_trace, why )
__field(loff_t, from )
__field(loff_t, to )
),
TP_fast_assign(
__entry->obj = obj->debug_id;
__entry->backer = backer->i_ino;
__entry->from = from;
__entry->to = to;
__entry->why = why;
),
TP_printk("o=%08x b=%08x %s l=%llx->%llx",
__entry->obj,
__entry->backer,
__print_symbolic(__entry->why, cachefiles_trunc_traces),
__entry->from,
__entry->to)
);
TRACE_EVENT(cachefiles_mark_active,
TP_PROTO(struct cachefiles_object *obj,
struct inode *inode),
TP_ARGS(obj, inode),
/* Note that obj may be NULL */
TP_STRUCT__entry(
__field(unsigned int, obj )
__field(ino_t, inode )
),
TP_fast_assign(
__entry->obj = obj ? obj->debug_id : 0;
__entry->inode = inode->i_ino;
),
TP_printk("o=%08x i=%lx",
__entry->obj, __entry->inode)
);
TRACE_EVENT(cachefiles_mark_inactive,
TP_PROTO(struct cachefiles_object *obj,
struct inode *inode),
TP_ARGS(obj, inode),
/* Note that obj may be NULL */
TP_STRUCT__entry(
__field(unsigned int, obj )
__field(ino_t, inode )
),
TP_fast_assign(
__entry->obj = obj ? obj->debug_id : 0;
__entry->inode = inode->i_ino;
),
TP_printk("o=%08x i=%lx",
__entry->obj, __entry->inode)
);
TRACE_EVENT(cachefiles_vfs_error,
TP_PROTO(struct cachefiles_object *obj, struct inode *backer,
int error, enum cachefiles_error_trace where),
TP_ARGS(obj, backer, error, where),
TP_STRUCT__entry(
__field(unsigned int, obj )
__field(unsigned int, backer )
__field(enum cachefiles_error_trace, where )
__field(short, error )
),
TP_fast_assign(
__entry->obj = obj ? obj->debug_id : 0;
__entry->backer = backer->i_ino;
__entry->error = error;
__entry->where = where;
),
TP_printk("o=%08x b=%08x %s e=%d",
__entry->obj,
__entry->backer,
__print_symbolic(__entry->where, cachefiles_error_traces),
__entry->error)
);
TRACE_EVENT(cachefiles_io_error,
TP_PROTO(struct cachefiles_object *obj, struct inode *backer,
int error, enum cachefiles_error_trace where),
TP_ARGS(obj, backer, error, where),
TP_STRUCT__entry(
__field(unsigned int, obj )
__field(unsigned int, backer )
__field(enum cachefiles_error_trace, where )
__field(short, error )
),
TP_fast_assign(
__entry->obj = obj ? obj->debug_id : 0;
__entry->backer = backer->i_ino;
__entry->error = error;
__entry->where = where;
),
TP_printk("o=%08x b=%08x %s e=%d",
__entry->obj,
__entry->backer,
__print_symbolic(__entry->where, cachefiles_error_traces),
__entry->error)
);
#endif /* _TRACE_CACHEFILES_H */
/* This part must be outside protection */
#include <trace/define_trace.h>
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