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Subject[PATCH 10/10] afs: Add more tracepoints
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Date
Add four more tracepoints:

(1) afs_make_fs_call1 - Split from afs_make_fs_call but takes a filename
to log also.

(2) afs_make_fs_call2 - Like the above but takes two filenames to log.

(3) afs_lookup - Log the result of doing a successful lookup, including a
negative result (fid 0:0).

(4) afs_get_tree - Log the set up of a volume for mounting.

It also extends the name buffer on the afs_edit_dir tracepoint to 24 chars
and puts quotes around the filename in the text representation.

Signed-off-by: David Howells <dhowells@redhat.com>
---

fs/afs/dir.c | 6 ++
fs/afs/fsclient.c | 10 ++-
fs/afs/super.c | 1
fs/afs/yfsclient.c | 14 ++--
include/trace/events/afs.h | 146 +++++++++++++++++++++++++++++++++++++++++++-
5 files changed, 161 insertions(+), 16 deletions(-)

diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 6c8523501639..8e3be31f94ce 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -908,8 +908,12 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
(void *)(unsigned long)dvnode->status.data_version;
}
d = d_splice_alias(inode, dentry);
- if (!IS_ERR_OR_NULL(d))
+ if (!IS_ERR_OR_NULL(d)) {
d->d_fsdata = dentry->d_fsdata;
+ trace_afs_lookup(dvnode, &d->d_name, inode ? AFS_FS_I(inode) : 0);
+ } else {
+ trace_afs_lookup(dvnode, &dentry->d_name, inode ? AFS_FS_I(inode) : 0);
+ }
return d;
}

diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index b9cf9dc1a9b7..b61ac50ed04a 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -830,7 +830,7 @@ int afs_fs_create(struct afs_fs_cursor *fc,
*bp++ = 0; /* segment size */

afs_use_fs_server(call, fc->cbi);
- trace_afs_make_fs_call(call, &vnode->fid);
+ trace_afs_make_fs_call1(call, &vnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
@@ -926,7 +926,7 @@ int afs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
}

afs_use_fs_server(call, fc->cbi);
- trace_afs_make_fs_call(call, &dvnode->fid);
+ trace_afs_make_fs_call1(call, &dvnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
@@ -1019,7 +1019,7 @@ int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
*bp++ = htonl(vnode->fid.unique);

afs_use_fs_server(call, fc->cbi);
- trace_afs_make_fs_call(call, &vnode->fid);
+ trace_afs_make_fs_call1(call, &vnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
@@ -1134,7 +1134,7 @@ int afs_fs_symlink(struct afs_fs_cursor *fc,
*bp++ = 0; /* segment size */

afs_use_fs_server(call, fc->cbi);
- trace_afs_make_fs_call(call, &vnode->fid);
+ trace_afs_make_fs_call1(call, &vnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
@@ -1253,7 +1253,7 @@ int afs_fs_rename(struct afs_fs_cursor *fc,
}

afs_use_fs_server(call, fc->cbi);
- trace_afs_make_fs_call(call, &orig_dvnode->fid);
+ trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
diff --git a/fs/afs/super.c b/fs/afs/super.c
index 6438849a75c4..ce85ae61f12d 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -550,6 +550,7 @@ static int afs_get_tree(struct fs_context *fc)
}

fc->root = dget(sb->s_root);
+ trace_afs_get_tree(as->cell, as->volume);
_leave(" = 0 [%p]", sb);
return 0;

diff --git a/fs/afs/yfsclient.c b/fs/afs/yfsclient.c
index 41afc53a7df7..0f2c6b915cbe 100644
--- a/fs/afs/yfsclient.c
+++ b/fs/afs/yfsclient.c
@@ -809,7 +809,7 @@ int yfs_fs_create_file(struct afs_fs_cursor *fc,
yfs_check_req(call, bp);

afs_use_fs_server(call, fc->cbi);
- trace_afs_make_fs_call(call, &vnode->fid);
+ trace_afs_make_fs_call1(call, &vnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
@@ -873,7 +873,7 @@ int yfs_fs_make_dir(struct afs_fs_cursor *fc,
yfs_check_req(call, bp);

afs_use_fs_server(call, fc->cbi);
- trace_afs_make_fs_call(call, &vnode->fid);
+ trace_afs_make_fs_call1(call, &vnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
@@ -964,7 +964,7 @@ int yfs_fs_remove_file2(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
yfs_check_req(call, bp);

afs_use_fs_server(call, fc->cbi);
- trace_afs_make_fs_call(call, &dvnode->fid);
+ trace_afs_make_fs_call1(call, &dvnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
@@ -1052,7 +1052,7 @@ int yfs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
yfs_check_req(call, bp);

afs_use_fs_server(call, fc->cbi);
- trace_afs_make_fs_call(call, &dvnode->fid);
+ trace_afs_make_fs_call1(call, &dvnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
@@ -1138,7 +1138,7 @@ int yfs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
yfs_check_req(call, bp);

afs_use_fs_server(call, fc->cbi);
- trace_afs_make_fs_call(call, &vnode->fid);
+ trace_afs_make_fs_call1(call, &vnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
@@ -1235,7 +1235,7 @@ int yfs_fs_symlink(struct afs_fs_cursor *fc,
yfs_check_req(call, bp);

afs_use_fs_server(call, fc->cbi);
- trace_afs_make_fs_call(call, &dvnode->fid);
+ trace_afs_make_fs_call1(call, &dvnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
@@ -1334,7 +1334,7 @@ int yfs_fs_rename(struct afs_fs_cursor *fc,
yfs_check_req(call, bp);

afs_use_fs_server(call, fc->cbi);
- trace_afs_make_fs_call(call, &orig_dvnode->fid);
+ trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
diff --git a/include/trace/events/afs.h b/include/trace/events/afs.h
index f67815ebb1b9..e81d6a50781f 100644
--- a/include/trace/events/afs.h
+++ b/include/trace/events/afs.h
@@ -539,6 +539,88 @@ TRACE_EVENT(afs_make_fs_call,
__print_symbolic(__entry->op, afs_fs_operations))
);

+TRACE_EVENT(afs_make_fs_call1,
+ TP_PROTO(struct afs_call *call, const struct afs_fid *fid,
+ const char *name),
+
+ TP_ARGS(call, fid, name),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, call )
+ __field(enum afs_fs_operation, op )
+ __field_struct(struct afs_fid, fid )
+ __array(char, name, 24 )
+ ),
+
+ TP_fast_assign(
+ int __len = strlen(name);
+ __len = min(__len, 23);
+ __entry->call = call->debug_id;
+ __entry->op = call->operation_ID;
+ if (fid) {
+ __entry->fid = *fid;
+ } else {
+ __entry->fid.vid = 0;
+ __entry->fid.vnode = 0;
+ __entry->fid.unique = 0;
+ }
+ memcpy(__entry->name, name, __len);
+ __entry->name[__len] = 0;
+ ),
+
+ TP_printk("c=%08x %06llx:%06llx:%06x %s \"%s\"",
+ __entry->call,
+ __entry->fid.vid,
+ __entry->fid.vnode,
+ __entry->fid.unique,
+ __print_symbolic(__entry->op, afs_fs_operations),
+ __entry->name)
+ );
+
+TRACE_EVENT(afs_make_fs_call2,
+ TP_PROTO(struct afs_call *call, const struct afs_fid *fid,
+ const char *name, const char *name2),
+
+ TP_ARGS(call, fid, name, name2),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, call )
+ __field(enum afs_fs_operation, op )
+ __field_struct(struct afs_fid, fid )
+ __array(char, name, 24 )
+ __array(char, name2, 24 )
+ ),
+
+ TP_fast_assign(
+ int __len = strlen(name);
+ int __len2 = strlen(name2);
+ __len = min(__len, 23);
+ __len2 = min(__len2, 23);
+ __entry->call = call->debug_id;
+ __entry->op = call->operation_ID;
+ if (fid) {
+ __entry->fid = *fid;
+ } else {
+ __entry->fid.vid = 0;
+ __entry->fid.vnode = 0;
+ __entry->fid.unique = 0;
+ }
+ memcpy(__entry->name, name, __len);
+ __entry->name[__len] = 0;
+ memcpy(__entry->name2, name2, __len2);
+ __entry->name2[__len2] = 0;
+ ),
+
+ TP_printk("c=%08x %06llx:%06llx:%06x %s \"%s\" \"%s\"",
+ __entry->call,
+ __entry->fid.vid,
+ __entry->fid.vnode,
+ __entry->fid.unique,
+ __print_symbolic(__entry->op, afs_fs_operations),
+ __entry->name,
+ __entry->name2)
+ );
+
TRACE_EVENT(afs_make_vl_call,
TP_PROTO(struct afs_call *call),

@@ -736,6 +818,38 @@ TRACE_EVENT(afs_call_state,
__entry->ret, __entry->abort)
);

+TRACE_EVENT(afs_lookup,
+ TP_PROTO(struct afs_vnode *dvnode, const struct qstr *name,
+ struct afs_vnode *vnode),
+
+ TP_ARGS(dvnode, name, vnode),
+
+ TP_STRUCT__entry(
+ __field_struct(struct afs_fid, dfid )
+ __field_struct(struct afs_fid, fid )
+ __array(char, name, 24 )
+ ),
+
+ TP_fast_assign(
+ int __len = min_t(int, name->len, 23);
+ __entry->dfid = dvnode->fid;
+ if (vnode) {
+ __entry->fid = vnode->fid;
+ } else {
+ __entry->fid.vid = 0;
+ __entry->fid.vnode = 0;
+ __entry->fid.unique = 0;
+ }
+ memcpy(__entry->name, name->name, __len);
+ __entry->name[__len] = 0;
+ ),
+
+ TP_printk("d=%llx:%llx:%x \"%s\" f=%llx:%x",
+ __entry->dfid.vid, __entry->dfid.vnode, __entry->dfid.unique,
+ __entry->name,
+ __entry->fid.vnode, __entry->fid.unique)
+ );
+
TRACE_EVENT(afs_edit_dir,
TP_PROTO(struct afs_vnode *dvnode,
enum afs_edit_dir_reason why,
@@ -757,12 +871,12 @@ TRACE_EVENT(afs_edit_dir,
__field(unsigned short, slot )
__field(unsigned int, f_vnode )
__field(unsigned int, f_unique )
- __array(char, name, 18 )
+ __array(char, name, 24 )
),

TP_fast_assign(
int __len = strlen(name);
- __len = min(__len, 17);
+ __len = min(__len, 23);
__entry->vnode = dvnode->fid.vnode;
__entry->unique = dvnode->fid.unique;
__entry->why = why;
@@ -775,7 +889,7 @@ TRACE_EVENT(afs_edit_dir,
__entry->name[__len] = 0;
),

- TP_printk("d=%x:%x %s %s %u[%u] f=%x:%x %s",
+ TP_printk("d=%x:%x %s %s %u[%u] f=%x:%x \"%s\"",
__entry->vnode, __entry->unique,
__print_symbolic(__entry->why, afs_edit_dir_reasons),
__print_symbolic(__entry->op, afs_edit_dir_ops),
@@ -994,6 +1108,32 @@ TRACE_EVENT(afs_silly_rename,
__entry->done)
);

+TRACE_EVENT(afs_get_tree,
+ TP_PROTO(struct afs_cell *cell, struct afs_volume *volume),
+
+ TP_ARGS(cell, volume),
+
+ TP_STRUCT__entry(
+ __field(u64, vid )
+ __array(char, cell, 24 )
+ __array(char, volume, 24 )
+ ),
+
+ TP_fast_assign(
+ int __len;
+ __entry->vid = volume->vid;
+ __len = min_t(int, cell->name_len, 23);
+ memcpy(__entry->cell, cell->name, __len);
+ __entry->cell[__len] = 0;
+ __len = min_t(int, volume->name_len, 23);
+ memcpy(__entry->volume, volume->name, __len);
+ __entry->volume[__len] = 0;
+ ),
+
+ TP_printk("--- MOUNT %s:%s %llx",
+ __entry->cell, __entry->volume, __entry->vid)
+ );
+
#endif /* _TRACE_AFS_H */

/* This part must be outside protection */
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