1:28 p.m.
name_snapshot will snapshot the current contents of a dentry's name for
later consumption. Several of those users end up needing to do a strlen
on the resulting string later. We already have that info in the original
dentry though, so we can do this a bit more efficiently by stuffing the
name length into the name_snapshot as well.
This is not well tested, but it built and booted. Do we have a testsuite
that exercises the fsnotify code, in particular?
Jeff Layton (5):
dcache: track the length of the string in struct name_snapshot
fsnotify: have fsnotify_move take a struct qstr instead of a string
fsnotify: have fsnotify() take a qstr instead of a string
fsnotify: change ->handle_event and send_to_group to take a qstr
audit: fix audit_compare_dname_path to take a qstr
fs/dcache.c | 11 +++++++----
fs/debugfs/inode.c | 2 +-
fs/kernfs/file.c | 6 ++++--
fs/namei.c | 4 ++--
fs/notify/dnotify/dnotify.c | 2 +-
fs/notify/fanotify/fanotify.c | 2 +-
fs/notify/fsnotify.c | 8 ++++----
fs/notify/inotify/inotify.h | 2 +-
fs/notify/inotify/inotify_fsnotify.c | 6 +++---
fs/overlayfs/export.c | 2 +-
include/linux/dcache.h | 2 +-
include/linux/fsnotify.h | 17 ++++++++---------
include/linux/fsnotify_backend.h | 6 +++---
kernel/audit.h | 3 ++-
kernel/audit_fsnotify.c | 5 +++--
kernel/audit_tree.c | 2 +-
kernel/audit_watch.c | 4 ++--
kernel/auditfilter.c | 7 ++++---
kernel/auditsc.c | 7 +++----
19 files changed, 52 insertions(+), 46 deletions(-)
--
2.20.1
1:28 p.m.
New subject: [PATCH 1/5] dcache: track the length of the string in struct name_snapshot
Several existing callers end up having to strlen the string, so just
convert the code over to set up a qstr instead and copy the length
from the original.
Signed-off-by: Jeff Layton <jlayton(a)kernel.org>
---
fs/dcache.c | 11 +++++++----
fs/debugfs/inode.c | 2 +-
fs/namei.c | 2 +-
fs/notify/fsnotify.c | 4 ++--
fs/overlayfs/export.c | 2 +-
include/linux/dcache.h | 2 +-
include/linux/fsnotify.h | 2 +-
7 files changed, 14 insertions(+), 11 deletions(-)
diff --git a/fs/dcache.c b/fs/dcache.c
index aac41adf4743..a8dcc27ce2d0 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -287,22 +287,25 @@ void take_dentry_name_snapshot(struct name_snapshot *name, struct
dentry *dentry
if (unlikely(dname_external(dentry))) {
struct external_name *p = external_name(dentry);
atomic_inc(&p->u.count);
+ name->name.len = dentry->d_name.len;
spin_unlock(&dentry->d_lock);
- name->name = p->name;
+ name->name.name = p->name;
} else {
memcpy(name->inline_name, dentry->d_iname,
dentry->d_name.len + 1);
+ name->name.len = dentry->d_name.len;
spin_unlock(&dentry->d_lock);
- name->name = name->inline_name;
+ name->name.name = name->inline_name;
}
}
EXPORT_SYMBOL(take_dentry_name_snapshot);
void release_dentry_name_snapshot(struct name_snapshot *name)
{
- if (unlikely(name->name != name->inline_name)) {
+ if (unlikely(name->name.name != name->inline_name)) {
struct external_name *p;
- p = container_of(name->name, struct external_name, name[0]);
+ p = container_of(name->name.name, struct external_name,
+ name[0]);
if (unlikely(atomic_dec_and_test(&p->u.count)))
kfree_rcu(p, u.head);
}
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index f25daa207421..37c0a025d7e8 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -824,7 +824,7 @@ struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry
*old_dentry,
goto exit;
}
d_move(old_dentry, dentry);
- fsnotify_move(d_inode(old_dir), d_inode(new_dir), old_name.name,
+ fsnotify_move(d_inode(old_dir), d_inode(new_dir), old_name.name.name,
d_is_dir(old_dentry),
NULL, old_dentry);
release_dentry_name_snapshot(&old_name);
diff --git a/fs/namei.c b/fs/namei.c
index dede0147b3f6..c96713077326 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -4498,7 +4498,7 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
inode_unlock(target);
dput(new_dentry);
if (!error) {
- fsnotify_move(old_dir, new_dir, old_name.name, is_dir,
+ fsnotify_move(old_dir, new_dir, old_name.name.name, is_dir,
!(flags & RENAME_EXCHANGE) ? target : NULL, old_dentry);
if (flags & RENAME_EXCHANGE) {
fsnotify_move(new_dir, old_dir, old_dentry->d_name.name,
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index df06f3da166c..fb22f76329ae 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -179,10 +179,10 @@ int __fsnotify_parent(const struct path *path, struct dentry
*dentry, __u32 mask
take_dentry_name_snapshot(&name, dentry);
if (path)
ret = fsnotify(p_inode, mask, path, FSNOTIFY_EVENT_PATH,
- name.name, 0);
+ name.name.name, 0);
else
ret = fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE,
- name.name, 0);
+ name.name.name, 0);
release_dentry_name_snapshot(&name);
}
diff --git a/fs/overlayfs/export.c b/fs/overlayfs/export.c
index 54e5d17d7f3e..cc1c9e5606ba 100644
--- a/fs/overlayfs/export.c
+++ b/fs/overlayfs/export.c
@@ -398,7 +398,7 @@ static struct dentry *ovl_lookup_real_one(struct dentry *connected,
* pointer because we hold no lock on the real dentry.
*/
take_dentry_name_snapshot(&name, real);
- this = lookup_one_len(name.name, connected, strlen(name.name));
+ this = lookup_one_len(name.name.name, connected, name.name.len);
err = PTR_ERR(this);
if (IS_ERR(this)) {
goto fail;
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 60996e64c579..2ff5f3bb9ddc 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -594,7 +594,7 @@ static inline struct inode *d_real_inode(const struct dentry *dentry)
}
struct name_snapshot {
- const unsigned char *name;
+ struct qstr name;
unsigned char inline_name[DNAME_INLINE_LEN];
};
void take_dentry_name_snapshot(struct name_snapshot *, struct dentry *);
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index 09587e2860b5..e09cfff69bb2 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -178,7 +178,7 @@ static inline void fsnotify_nameremove(struct dentry *dentry, int
isdir)
take_dentry_name_snapshot(&name, dentry);
fsnotify(d_inode(parent), mask, d_inode(dentry), FSNOTIFY_EVENT_INODE,
- name.name, 0);
+ name.name.name, 0);
release_dentry_name_snapshot(&name);
dput(parent);
--
2.20.1
1:28 p.m.
New subject: [PATCH 2/5] fsnotify: have fsnotify_move take a struct qstr instead of a string
With this, ovl_lookup_real_one can skip the strlen call.
Signed-off-by: Jeff Layton <jlayton(a)kernel.org>
---
fs/debugfs/inode.c | 2 +-
fs/namei.c | 4 ++--
include/linux/fsnotify.h | 11 +++++------
3 files changed, 8 insertions(+), 9 deletions(-)
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 37c0a025d7e8..5dbeefa69a58 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -824,7 +824,7 @@ struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry
*old_dentry,
goto exit;
}
d_move(old_dentry, dentry);
- fsnotify_move(d_inode(old_dir), d_inode(new_dir), old_name.name.name,
+ fsnotify_move(d_inode(old_dir), d_inode(new_dir), &old_name.name,
d_is_dir(old_dentry),
NULL, old_dentry);
release_dentry_name_snapshot(&old_name);
diff --git a/fs/namei.c b/fs/namei.c
index c96713077326..5ebd64b21970 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -4498,10 +4498,10 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
inode_unlock(target);
dput(new_dentry);
if (!error) {
- fsnotify_move(old_dir, new_dir, old_name.name.name, is_dir,
+ fsnotify_move(old_dir, new_dir, &old_name.name, is_dir,
!(flags & RENAME_EXCHANGE) ? target : NULL, old_dentry);
if (flags & RENAME_EXCHANGE) {
- fsnotify_move(new_dir, old_dir, old_dentry->d_name.name,
+ fsnotify_move(new_dir, old_dir, &old_dentry->d_name,
new_is_dir, NULL, new_dentry);
}
}
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index e09cfff69bb2..2de90a7e388b 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -102,7 +102,7 @@ static inline void fsnotify_link_count(struct inode *inode)
* fsnotify_move - file old_name at old_dir was moved to new_name at new_dir
*/
static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir,
- const unsigned char *old_name,
+ const struct qstr *old_name,
int isdir, struct inode *target,
struct dentry *moved)
{
@@ -111,7 +111,6 @@ static inline void fsnotify_move(struct inode *old_dir, struct inode
*new_dir,
__u32 old_dir_mask = FS_MOVED_FROM;
__u32 new_dir_mask = FS_MOVED_TO;
__u32 mask = FS_MOVE_SELF;
- const unsigned char *new_name = moved->d_name.name;
if (old_dir == new_dir)
old_dir_mask |= FS_DN_RENAME;
@@ -122,10 +121,10 @@ static inline void fsnotify_move(struct inode *old_dir, struct inode
*new_dir,
mask |= FS_ISDIR;
}
- fsnotify(old_dir, old_dir_mask, source, FSNOTIFY_EVENT_INODE, old_name,
- fs_cookie);
- fsnotify(new_dir, new_dir_mask, source, FSNOTIFY_EVENT_INODE, new_name,
- fs_cookie);
+ fsnotify(old_dir, old_dir_mask, source, FSNOTIFY_EVENT_INODE,
+ old_name->name, fs_cookie);
+ fsnotify(new_dir, new_dir_mask, source, FSNOTIFY_EVENT_INODE,
+ moved->d_name.name, fs_cookie);
if (target)
fsnotify_link_count(target);
--
2.20.1
1:28 p.m.
New subject: [PATCH 3/5] fsnotify: have fsnotify() take a qstr instead of a string
This means that kernfs_notify_workfn has to grow a strlen as well.
Signed-off-by: Jeff Layton <jlayton(a)kernel.org>
---
fs/kernfs/file.c | 6 ++++--
fs/notify/fsnotify.c | 8 ++++----
include/linux/fsnotify.h | 10 +++++-----
include/linux/fsnotify_backend.h | 4 ++--
4 files changed, 15 insertions(+), 13 deletions(-)
diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c
index ae948aaa4c53..a43283c515f4 100644
--- a/fs/kernfs/file.c
+++ b/fs/kernfs/file.c
@@ -885,6 +885,8 @@ static void kernfs_notify_workfn(struct work_struct *work)
list_for_each_entry(info, &kernfs_root(kn)->supers, node) {
struct kernfs_node *parent;
struct inode *inode;
+ const struct qstr name = { .name = kn->name,
+ .len = strlen(kn->name) };
/*
* We want fsnotify_modify() on @kn but as the
@@ -903,7 +905,7 @@ static void kernfs_notify_workfn(struct work_struct *work)
p_inode = ilookup(info->sb, parent->id.ino);
if (p_inode) {
fsnotify(p_inode, FS_MODIFY | FS_EVENT_ON_CHILD,
- inode, FSNOTIFY_EVENT_INODE, kn->name, 0);
+ inode, FSNOTIFY_EVENT_INODE, &name, 0);
iput(p_inode);
}
@@ -911,7 +913,7 @@ static void kernfs_notify_workfn(struct work_struct *work)
}
fsnotify(inode, FS_MODIFY, inode, FSNOTIFY_EVENT_INODE,
- kn->name, 0);
+ &name, 0);
iput(inode);
}
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index fb22f76329ae..9cbb5ae11d2f 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -179,10 +179,10 @@ int __fsnotify_parent(const struct path *path, struct dentry
*dentry, __u32 mask
take_dentry_name_snapshot(&name, dentry);
if (path)
ret = fsnotify(p_inode, mask, path, FSNOTIFY_EVENT_PATH,
- name.name.name, 0);
+ &name.name, 0);
else
ret = fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE,
- name.name.name, 0);
+ &name.name, 0);
release_dentry_name_snapshot(&name);
}
@@ -325,7 +325,7 @@ static void fsnotify_iter_next(struct fsnotify_iter_info *iter_info)
* notification event in whatever means they feel necessary.
*/
int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is,
- const unsigned char *file_name, u32 cookie)
+ const struct qstr *file_name, u32 cookie)
{
struct fsnotify_iter_info iter_info = {};
struct super_block *sb = to_tell->i_sb;
@@ -379,7 +379,7 @@ int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int
data_is,
*/
while (fsnotify_iter_select_report_types(&iter_info)) {
ret = send_to_group(to_tell, mask, data, data_is, cookie,
- file_name, &iter_info);
+ file_name->name, &iter_info);
if (ret && (mask & ALL_FSNOTIFY_PERM_EVENTS))
goto out;
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index 2de90a7e388b..66e322df78a3 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -27,7 +27,7 @@ static inline int fsnotify_dirent(struct inode *dir, struct dentry
*dentry,
__u32 mask)
{
return fsnotify(dir, mask, d_inode(dentry), FSNOTIFY_EVENT_INODE,
- dentry->d_name.name, 0);
+ &dentry->d_name, 0);
}
/* Notify this dentry's parent about a child's events. */
@@ -122,9 +122,9 @@ static inline void fsnotify_move(struct inode *old_dir, struct inode
*new_dir,
}
fsnotify(old_dir, old_dir_mask, source, FSNOTIFY_EVENT_INODE,
- old_name->name, fs_cookie);
+ old_name, fs_cookie);
fsnotify(new_dir, new_dir_mask, source, FSNOTIFY_EVENT_INODE,
- moved->d_name.name, fs_cookie);
+ &moved->d_name, fs_cookie);
if (target)
fsnotify_link_count(target);
@@ -177,7 +177,7 @@ static inline void fsnotify_nameremove(struct dentry *dentry, int
isdir)
take_dentry_name_snapshot(&name, dentry);
fsnotify(d_inode(parent), mask, d_inode(dentry), FSNOTIFY_EVENT_INODE,
- name.name.name, 0);
+ &name.name, 0);
release_dentry_name_snapshot(&name);
dput(parent);
@@ -217,7 +217,7 @@ static inline void fsnotify_link(struct inode *dir, struct inode
*inode, struct
fsnotify_link_count(inode);
audit_inode_child(dir, new_dentry, AUDIT_TYPE_CHILD_CREATE);
- fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, new_dentry->d_name.name, 0);
+ fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, &new_dentry->d_name, 0);
}
/*
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index dfc28fcb4de8..7eb7821766d5 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -350,7 +350,7 @@ struct fsnotify_mark {
/* main fsnotify call to send events */
extern int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is,
- const unsigned char *name, u32 cookie);
+ const struct qstr *name, u32 cookie);
extern int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32
mask);
extern void __fsnotify_inode_delete(struct inode *inode);
extern void __fsnotify_vfsmount_delete(struct vfsmount *mnt);
@@ -505,7 +505,7 @@ static inline void fsnotify_init_event(struct fsnotify_event *event,
#else
static inline int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int
data_is,
- const unsigned char *name, u32 cookie)
+ const struct qstr *name, u32 cookie)
{
return 0;
}
--
2.20.1
1:28 p.m.
New subject: [PATCH 4/5] fsnotify: change ->handle_event and send_to_group to take a qstr
Signed-off-by: Jeff Layton <jlayton(a)kernel.org>
---
fs/notify/dnotify/dnotify.c | 2 +-
fs/notify/fanotify/fanotify.c | 2 +-
fs/notify/fsnotify.c | 4 ++--
fs/notify/inotify/inotify.h | 2 +-
fs/notify/inotify/inotify_fsnotify.c | 6 +++---
include/linux/fsnotify_backend.h | 2 +-
kernel/audit_fsnotify.c | 5 +++--
kernel/audit_tree.c | 2 +-
kernel/audit_watch.c | 6 +++---
9 files changed, 16 insertions(+), 15 deletions(-)
diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c
index 58d77dc696eb..250369d6901d 100644
--- a/fs/notify/dnotify/dnotify.c
+++ b/fs/notify/dnotify/dnotify.c
@@ -81,7 +81,7 @@ static void dnotify_recalc_inode_mask(struct fsnotify_mark *fsn_mark)
static int dnotify_handle_event(struct fsnotify_group *group,
struct inode *inode,
u32 mask, const void *data, int data_type,
- const unsigned char *file_name, u32 cookie,
+ const struct qstr *file_name, u32 cookie,
struct fsnotify_iter_info *iter_info)
{
struct fsnotify_mark *inode_mark = fsnotify_iter_inode_mark(iter_info);
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index 6b9c27548997..a34d7e003d7d 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -361,7 +361,7 @@ static __kernel_fsid_t fanotify_get_fsid(struct fsnotify_iter_info
*iter_info)
static int fanotify_handle_event(struct fsnotify_group *group,
struct inode *inode,
u32 mask, const void *data, int data_type,
- const unsigned char *file_name, u32 cookie,
+ const struct qstr *file_name, u32 cookie,
struct fsnotify_iter_info *iter_info)
{
int ret = 0;
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 9cbb5ae11d2f..5433e37fb0c5 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -195,7 +195,7 @@ EXPORT_SYMBOL_GPL(__fsnotify_parent);
static int send_to_group(struct inode *to_tell,
__u32 mask, const void *data,
int data_is, u32 cookie,
- const unsigned char *file_name,
+ const struct qstr *file_name,
struct fsnotify_iter_info *iter_info)
{
struct fsnotify_group *group = NULL;
@@ -379,7 +379,7 @@ int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int
data_is,
*/
while (fsnotify_iter_select_report_types(&iter_info)) {
ret = send_to_group(to_tell, mask, data, data_is, cookie,
- file_name->name, &iter_info);
+ file_name, &iter_info);
if (ret && (mask & ALL_FSNOTIFY_PERM_EVENTS))
goto out;
diff --git a/fs/notify/inotify/inotify.h b/fs/notify/inotify/inotify.h
index 74ae60305189..3f246f7b8a92 100644
--- a/fs/notify/inotify/inotify.h
+++ b/fs/notify/inotify/inotify.h
@@ -27,7 +27,7 @@ extern void inotify_ignored_and_remove_idr(struct fsnotify_mark
*fsn_mark,
extern int inotify_handle_event(struct fsnotify_group *group,
struct inode *inode,
u32 mask, const void *data, int data_type,
- const unsigned char *file_name, u32 cookie,
+ const struct qstr *file_name, u32 cookie,
struct fsnotify_iter_info *iter_info);
extern const struct fsnotify_ops inotify_fsnotify_ops;
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index ff30abd6a49b..7e8b131029f8 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -67,7 +67,7 @@ static int inotify_merge(struct list_head *list,
int inotify_handle_event(struct fsnotify_group *group,
struct inode *inode,
u32 mask, const void *data, int data_type,
- const unsigned char *file_name, u32 cookie,
+ const struct qstr *file_name, u32 cookie,
struct fsnotify_iter_info *iter_info)
{
struct fsnotify_mark *inode_mark = fsnotify_iter_inode_mark(iter_info);
@@ -89,7 +89,7 @@ int inotify_handle_event(struct fsnotify_group *group,
return 0;
}
if (file_name) {
- len = strlen(file_name);
+ len = file_name->len;
alloc_len += len + 1;
}
@@ -129,7 +129,7 @@ int inotify_handle_event(struct fsnotify_group *group,
event->sync_cookie = cookie;
event->name_len = len;
if (len)
- strcpy(event->name, file_name);
+ strcpy(event->name, file_name->name);
ret = fsnotify_add_event(group, fsn_event, inotify_merge);
if (ret) {
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 7eb7821766d5..c28f6ed1f59b 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -117,7 +117,7 @@ struct fsnotify_ops {
int (*handle_event)(struct fsnotify_group *group,
struct inode *inode,
u32 mask, const void *data, int data_type,
- const unsigned char *file_name, u32 cookie,
+ const struct qstr *file_name, u32 cookie,
struct fsnotify_iter_info *iter_info);
void (*free_group_priv)(struct fsnotify_group *group);
void (*freeing_mark)(struct fsnotify_mark *mark, struct fsnotify_group *group);
diff --git a/kernel/audit_fsnotify.c b/kernel/audit_fsnotify.c
index 37ae95cfb7f4..6def7f426ba6 100644
--- a/kernel/audit_fsnotify.c
+++ b/kernel/audit_fsnotify.c
@@ -164,7 +164,7 @@ static void audit_autoremove_mark_rule(struct audit_fsnotify_mark
*audit_mark)
static int audit_mark_handle_event(struct fsnotify_group *group,
struct inode *to_tell,
u32 mask, const void *data, int data_type,
- const unsigned char *dname, u32 cookie,
+ const struct qstr *dname, u32 cookie,
struct fsnotify_iter_info *iter_info)
{
struct fsnotify_mark *inode_mark = fsnotify_iter_inode_mark(iter_info);
@@ -188,7 +188,8 @@ static int audit_mark_handle_event(struct fsnotify_group *group,
}
if (mask & (FS_CREATE|FS_MOVED_TO|FS_DELETE|FS_MOVED_FROM)) {
- if (audit_compare_dname_path(dname, audit_mark->path, AUDIT_NAME_FULL))
+ if (audit_compare_dname_path(dname->name, audit_mark->path,
+ AUDIT_NAME_FULL))
return 0;
audit_update_mark(audit_mark, inode);
} else if (mask & (FS_DELETE_SELF|FS_UNMOUNT|FS_MOVE_SELF))
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index abfb112f26aa..e49c912f862d 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -1040,7 +1040,7 @@ static void evict_chunk(struct audit_chunk *chunk)
static int audit_tree_handle_event(struct fsnotify_group *group,
struct inode *to_tell,
u32 mask, const void *data, int data_type,
- const unsigned char *file_name, u32 cookie,
+ const struct qstr *file_name, u32 cookie,
struct fsnotify_iter_info *iter_info)
{
return 0;
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index e8d1adeb2223..3c12fd5b680e 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -482,7 +482,7 @@ void audit_remove_watch_rule(struct audit_krule *krule)
static int audit_watch_handle_event(struct fsnotify_group *group,
struct inode *to_tell,
u32 mask, const void *data, int data_type,
- const unsigned char *dname, u32 cookie,
+ const struct qstr *dname, u32 cookie,
struct fsnotify_iter_info *iter_info)
{
struct fsnotify_mark *inode_mark = fsnotify_iter_inode_mark(iter_info);
@@ -507,9 +507,9 @@ static int audit_watch_handle_event(struct fsnotify_group *group,
}
if (mask & (FS_CREATE|FS_MOVED_TO) && inode)
- audit_update_watch(parent, dname, inode->i_sb->s_dev, inode->i_ino, 0);
+ audit_update_watch(parent, dname->name, inode->i_sb->s_dev, inode->i_ino,
0);
else if (mask & (FS_DELETE|FS_MOVED_FROM))
- audit_update_watch(parent, dname, AUDIT_DEV_UNSET, AUDIT_INO_UNSET, 1);
+ audit_update_watch(parent, dname->name, AUDIT_DEV_UNSET, AUDIT_INO_UNSET, 1);
else if (mask & (FS_DELETE_SELF|FS_UNMOUNT|FS_MOVE_SELF))
audit_remove_parent_watches(parent);
--
2.20.1
1:28 p.m.
New subject: [PATCH 5/5] audit: fix audit_compare_dname_path to take a qstr
...and eliminate its strlen call.
Signed-off-by: Jeff Layton <jlayton(a)kernel.org>
---
kernel/audit.h | 3 ++-
kernel/audit_fsnotify.c | 2 +-
kernel/audit_watch.c | 6 +++---
kernel/auditfilter.c | 7 ++++---
kernel/auditsc.c | 7 +++----
5 files changed, 13 insertions(+), 12 deletions(-)
diff --git a/kernel/audit.h b/kernel/audit.h
index 958d5b8fc1b3..8c581fd38050 100644
--- a/kernel/audit.h
+++ b/kernel/audit.h
@@ -231,7 +231,8 @@ extern int audit_comparator(const u32 left, const u32 op, const u32
right);
extern int audit_uid_comparator(kuid_t left, u32 op, kuid_t right);
extern int audit_gid_comparator(kgid_t left, u32 op, kgid_t right);
extern int parent_len(const char *path);
-extern int audit_compare_dname_path(const char *dname, const char *path, int plen);
+extern int audit_compare_dname_path(const struct qstr *dname, const char *path,
+ int plen);
extern struct sk_buff *audit_make_reply(int seq, int type, int done, int multi,
const void *payload, int size);
extern void audit_panic(const char *message);
diff --git a/kernel/audit_fsnotify.c b/kernel/audit_fsnotify.c
index 6def7f426ba6..af281e965d24 100644
--- a/kernel/audit_fsnotify.c
+++ b/kernel/audit_fsnotify.c
@@ -188,7 +188,7 @@ static int audit_mark_handle_event(struct fsnotify_group *group,
}
if (mask & (FS_CREATE|FS_MOVED_TO|FS_DELETE|FS_MOVED_FROM)) {
- if (audit_compare_dname_path(dname->name, audit_mark->path,
+ if (audit_compare_dname_path(dname, audit_mark->path,
AUDIT_NAME_FULL))
return 0;
audit_update_mark(audit_mark, inode);
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index 3c12fd5b680e..b50c574223fa 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -255,7 +255,7 @@ static void audit_watch_log_rule_change(struct audit_krule *r, struct
audit_watc
/* Update inode info in audit rules based on filesystem event. */
static void audit_update_watch(struct audit_parent *parent,
- const char *dname, dev_t dev,
+ const struct qstr *dname, dev_t dev,
unsigned long ino, unsigned invalidating)
{
struct audit_watch *owatch, *nwatch, *nextw;
@@ -507,9 +507,9 @@ static int audit_watch_handle_event(struct fsnotify_group *group,
}
if (mask & (FS_CREATE|FS_MOVED_TO) && inode)
- audit_update_watch(parent, dname->name, inode->i_sb->s_dev, inode->i_ino,
0);
+ audit_update_watch(parent, dname, inode->i_sb->s_dev, inode->i_ino, 0);
else if (mask & (FS_DELETE|FS_MOVED_FROM))
- audit_update_watch(parent, dname->name, AUDIT_DEV_UNSET, AUDIT_INO_UNSET, 1);
+ audit_update_watch(parent, dname, AUDIT_DEV_UNSET, AUDIT_INO_UNSET, 1);
else if (mask & (FS_DELETE_SELF|FS_UNMOUNT|FS_MOVE_SELF))
audit_remove_parent_watches(parent);
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 63f8b3f26fab..6f585b48f4ef 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -1290,12 +1290,13 @@ int parent_len(const char *path)
* @parentlen: length of the parent if known. Passing in AUDIT_NAME_FULL
* here indicates that we must compute this value.
*/
-int audit_compare_dname_path(const char *dname, const char *path, int parentlen)
+int audit_compare_dname_path(const struct qstr *dname, const char *path,
+ int parentlen)
{
int dlen, pathlen;
const char *p;
- dlen = strlen(dname);
+ dlen = dname->len;
pathlen = strlen(path);
if (pathlen < dlen)
return 1;
@@ -1306,7 +1307,7 @@ int audit_compare_dname_path(const char *dname, const char *path,
int parentlen)
p = path + parentlen;
- return strncmp(p, dname, dlen);
+ return strncmp(p, dname->name, dlen);
}
int audit_filter(int msgtype, unsigned int listtype)
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index d1eab1d4a930..05e06b766af1 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2045,7 +2045,6 @@ void __audit_inode_child(struct inode *parent,
{
struct audit_context *context = audit_context();
struct inode *inode = d_backing_inode(dentry);
- const char *dname = dentry->d_name.name;
struct audit_names *n, *found_parent = NULL, *found_child = NULL;
struct audit_entry *e;
struct list_head *list = &audit_filter_list[AUDIT_FILTER_FS];
@@ -2083,7 +2082,7 @@ void __audit_inode_child(struct inode *parent,
continue;
if (n->ino == parent->i_ino && n->dev == parent->i_sb->s_dev
&&
- !audit_compare_dname_path(dname,
+ !audit_compare_dname_path(&dentry->d_name,
n->name->name, n->name_len)) {
if (n->type == AUDIT_TYPE_UNKNOWN)
n->type = AUDIT_TYPE_PARENT;
@@ -2099,8 +2098,8 @@ void __audit_inode_child(struct inode *parent,
(n->type != type && n->type != AUDIT_TYPE_UNKNOWN))
continue;
- if (!strcmp(dname, n->name->name) ||
- !audit_compare_dname_path(dname, n->name->name,
+ if (!strcmp(dentry->d_name.name, n->name->name) ||
+ !audit_compare_dname_path(&dentry->d_name, n->name->name,
found_parent ?
found_parent->name_len :
AUDIT_NAME_FULL)) {
--
2.20.1
2:02 p.m.
New subject: [PATCH 5/5] audit: fix audit_compare_dname_path to take a qstr
On Fri, Apr 26, 2019 at 2:28 PM Jeff Layton <jlayton(a)kernel.org> wrote:
...and eliminate its strlen call.
Signed-off-by: Jeff Layton <jlayton(a)kernel.org>
---
kernel/audit.h | 3 ++-
kernel/audit_fsnotify.c | 2 +-
kernel/audit_watch.c | 6 +++---
kernel/auditfilter.c | 7 ++++---
kernel/auditsc.c | 7 +++----
5 files changed, 13 insertions(+), 12 deletions(-)
This looks fine to me. I'm guessing you are planning on this going in
with the other patches, but if you want me to pull this single patch
into audit/next let me know.
Acked-by: Paul Moore <paul(a)paul-moore.com>
diff --git a/kernel/audit.h b/kernel/audit.h
index 958d5b8fc1b3..8c581fd38050 100644
--- a/kernel/audit.h
+++ b/kernel/audit.h
@@ -231,7 +231,8 @@ extern int audit_comparator(const u32 left, const u32 op, const u32
right);
extern int audit_uid_comparator(kuid_t left, u32 op, kuid_t right);
extern int audit_gid_comparator(kgid_t left, u32 op, kgid_t right);
extern int parent_len(const char *path);
-extern int audit_compare_dname_path(const char *dname, const char *path, int plen);
+extern int audit_compare_dname_path(const struct qstr *dname, const char *path,
+ int plen);
extern struct sk_buff *audit_make_reply(int seq, int type, int done, int multi,
const void *payload, int size);
extern void audit_panic(const char *message);
diff --git a/kernel/audit_fsnotify.c b/kernel/audit_fsnotify.c
index 6def7f426ba6..af281e965d24 100644
--- a/kernel/audit_fsnotify.c
+++ b/kernel/audit_fsnotify.c
@@ -188,7 +188,7 @@ static int audit_mark_handle_event(struct fsnotify_group *group,
}
if (mask & (FS_CREATE|FS_MOVED_TO|FS_DELETE|FS_MOVED_FROM)) {
- if (audit_compare_dname_path(dname->name, audit_mark->path,
+ if (audit_compare_dname_path(dname, audit_mark->path,
AUDIT_NAME_FULL))
return 0;
audit_update_mark(audit_mark, inode);
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index 3c12fd5b680e..b50c574223fa 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -255,7 +255,7 @@ static void audit_watch_log_rule_change(struct audit_krule *r, struct
audit_watc
/* Update inode info in audit rules based on filesystem event. */
static void audit_update_watch(struct audit_parent *parent,
- const char *dname, dev_t dev,
+ const struct qstr *dname, dev_t dev,
unsigned long ino, unsigned invalidating)
{
struct audit_watch *owatch, *nwatch, *nextw;
@@ -507,9 +507,9 @@ static int audit_watch_handle_event(struct fsnotify_group *group,
}
if (mask & (FS_CREATE|FS_MOVED_TO) && inode)
- audit_update_watch(parent, dname->name, inode->i_sb->s_dev,
inode->i_ino, 0);
+ audit_update_watch(parent, dname, inode->i_sb->s_dev,
inode->i_ino, 0);
else if (mask & (FS_DELETE|FS_MOVED_FROM))
- audit_update_watch(parent, dname->name, AUDIT_DEV_UNSET,
AUDIT_INO_UNSET, 1);
+ audit_update_watch(parent, dname, AUDIT_DEV_UNSET, AUDIT_INO_UNSET, 1);
else if (mask & (FS_DELETE_SELF|FS_UNMOUNT|FS_MOVE_SELF))
audit_remove_parent_watches(parent);
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 63f8b3f26fab..6f585b48f4ef 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -1290,12 +1290,13 @@ int parent_len(const char *path)
* @parentlen: length of the parent if known. Passing in AUDIT_NAME_FULL
* here indicates that we must compute this value.
*/
-int audit_compare_dname_path(const char *dname, const char *path, int parentlen)
+int audit_compare_dname_path(const struct qstr *dname, const char *path,
+ int parentlen)
{
int dlen, pathlen;
const char *p;
- dlen = strlen(dname);
+ dlen = dname->len;
pathlen = strlen(path);
if (pathlen < dlen)
return 1;
@@ -1306,7 +1307,7 @@ int audit_compare_dname_path(const char *dname, const char *path,
int parentlen)
p = path + parentlen;
- return strncmp(p, dname, dlen);
+ return strncmp(p, dname->name, dlen);
}
int audit_filter(int msgtype, unsigned int listtype)
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index d1eab1d4a930..05e06b766af1 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2045,7 +2045,6 @@ void __audit_inode_child(struct inode *parent,
{
struct audit_context *context = audit_context();
struct inode *inode = d_backing_inode(dentry);
- const char *dname = dentry->d_name.name;
struct audit_names *n, *found_parent = NULL, *found_child = NULL;
struct audit_entry *e;
struct list_head *list = &audit_filter_list[AUDIT_FILTER_FS];
@@ -2083,7 +2082,7 @@ void __audit_inode_child(struct inode *parent,
continue;
if (n->ino == parent->i_ino && n->dev ==
parent->i_sb->s_dev &&
- !audit_compare_dname_path(dname,
+ !audit_compare_dname_path(&dentry->d_name,
n->name->name, n->name_len)) {
if (n->type == AUDIT_TYPE_UNKNOWN)
n->type = AUDIT_TYPE_PARENT;
@@ -2099,8 +2098,8 @@ void __audit_inode_child(struct inode *parent,
(n->type != type && n->type != AUDIT_TYPE_UNKNOWN))
continue;
- if (!strcmp(dname, n->name->name) ||
- !audit_compare_dname_path(dname, n->name->name,
+ if (!strcmp(dentry->d_name.name, n->name->name) ||
+ !audit_compare_dname_path(&dentry->d_name,
n->name->name,
found_parent ?
found_parent->name_len :
AUDIT_NAME_FULL)) {
--
2.20.1
--
paul moore
www.paul-moore.com
1:51 p.m.
On Fri, Apr 26, 2019 at 02:28:42PM -0400, Jeff Layton wrote:
name_snapshot will snapshot the current contents of a dentry's
name for
later consumption. Several of those users end up needing to do a strlen
on the resulting string later. We already have that info in the original
dentry though, so we can do this a bit more efficiently by stuffing the
name length into the name_snapshot as well.
This is not well tested, but it built and booted. Do we have a testsuite
that exercises the fsnotify code, in particular?
FWIW, my variant sits in vfs.git(a)work.dcache.
Jeff Layton (5):
dcache: track the length of the string in struct name_snapshot
fsnotify: have fsnotify_move take a struct qstr instead of a string
fsnotify: have fsnotify() take a qstr instead of a string
fsnotify: change ->handle_event and send_to_group to take a qstr
audit: fix audit_compare_dname_path to take a qstr
fs/dcache.c | 11 +++++++----
fs/debugfs/inode.c | 2 +-
fs/kernfs/file.c | 6 ++++--
fs/namei.c | 4 ++--
fs/notify/dnotify/dnotify.c | 2 +-
fs/notify/fanotify/fanotify.c | 2 +-
fs/notify/fsnotify.c | 8 ++++----
fs/notify/inotify/inotify.h | 2 +-
fs/notify/inotify/inotify_fsnotify.c | 6 +++---
fs/overlayfs/export.c | 2 +-
include/linux/dcache.h | 2 +-
include/linux/fsnotify.h | 17 ++++++++---------
include/linux/fsnotify_backend.h | 6 +++---
kernel/audit.h | 3 ++-
kernel/audit_fsnotify.c | 5 +++--
kernel/audit_tree.c | 2 +-
kernel/audit_watch.c | 4 ++--
kernel/auditfilter.c | 7 ++++---
kernel/auditsc.c | 7 +++----
19 files changed, 52 insertions(+), 46 deletions(-)
fs/dcache.c | 14 ++++++--------
fs/debugfs/inode.c | 2 +-
fs/kernfs/file.c | 6 ++++--
fs/namei.c | 4 ++--
fs/notify/dnotify/dnotify.c | 2 +-
fs/notify/fanotify/fanotify.c | 2 +-
fs/notify/fsnotify.c | 8 ++++----
fs/notify/inotify/inotify.h | 2 +-
fs/notify/inotify/inotify_fsnotify.c | 6 +++---
fs/overlayfs/export.c | 2 +-
include/linux/dcache.h | 2 +-
include/linux/fsnotify.h | 10 +++++-----
include/linux/fsnotify_backend.h | 6 +++---
kernel/audit.h | 2 +-
kernel/audit_fsnotify.c | 2 +-
kernel/audit_tree.c | 2 +-
kernel/audit_watch.c | 4 ++--
kernel/auditfilter.c | 6 +++---
kernel/auditsc.c | 4 ++--
19 files changed, 43 insertions(+), 43 deletions(-)
here...
1:59 p.m.
On Fri, Apr 26, 2019 at 2:52 PM Al Viro <viro(a)zeniv.linux.org.uk> wrote:
On Fri, Apr 26, 2019 at 02:28:42PM -0400, Jeff Layton wrote:
> name_snapshot will snapshot the current contents of a dentry's name for
> later consumption. Several of those users end up needing to do a strlen
> on the resulting string later. We already have that info in the original
> dentry though, so we can do this a bit more efficiently by stuffing the
> name length into the name_snapshot as well.
>
> This is not well tested, but it built and booted. Do we have a testsuite
> that exercises the fsnotify code, in particular?
FWIW, my variant sits in vfs.git(a)work.dcache.
Jan Kara contributed some audit related stress tests to the
audit-testsuite (link below). You can find the tests under
./tests_manual/stress_tree.
* https://github.com/linux-audit/audit-testsuite
--
paul moore
www.paul-moore.com
2:03 p.m.
On Fri, 2019-04-26 at 19:51 +0100, Al Viro wrote:
On Fri, Apr 26, 2019 at 02:28:42PM -0400, Jeff Layton wrote:
> name_snapshot will snapshot the current contents of a dentry's name for
> later consumption. Several of those users end up needing to do a strlen
> on the resulting string later. We already have that info in the original
> dentry though, so we can do this a bit more efficiently by stuffing the
> name length into the name_snapshot as well.
>
> This is not well tested, but it built and booted. Do we have a testsuite
> that exercises the fsnotify code, in particular?
FWIW, my variant sits in vfs.git(a)work.dcache.
> Jeff Layton (5):
> dcache: track the length of the string in struct name_snapshot
> fsnotify: have fsnotify_move take a struct qstr instead of a string
> fsnotify: have fsnotify() take a qstr instead of a string
> fsnotify: change ->handle_event and send_to_group to take a qstr
> audit: fix audit_compare_dname_path to take a qstr
>
> fs/dcache.c | 11 +++++++----
> fs/debugfs/inode.c | 2 +-
> fs/kernfs/file.c | 6 ++++--
> fs/namei.c | 4 ++--
> fs/notify/dnotify/dnotify.c | 2 +-
> fs/notify/fanotify/fanotify.c | 2 +-
> fs/notify/fsnotify.c | 8 ++++----
> fs/notify/inotify/inotify.h | 2 +-
> fs/notify/inotify/inotify_fsnotify.c | 6 +++---
> fs/overlayfs/export.c | 2 +-
> include/linux/dcache.h | 2 +-
> include/linux/fsnotify.h | 17 ++++++++---------
> include/linux/fsnotify_backend.h | 6 +++---
> kernel/audit.h | 3 ++-
> kernel/audit_fsnotify.c | 5 +++--
> kernel/audit_tree.c | 2 +-
> kernel/audit_watch.c | 4 ++--
> kernel/auditfilter.c | 7 ++++---
> kernel/auditsc.c | 7 +++----
> 19 files changed, 52 insertions(+), 46 deletions(-)
fs/dcache.c | 14 ++++++--------
fs/debugfs/inode.c | 2 +-
fs/kernfs/file.c | 6 ++++--
fs/namei.c | 4 ++--
fs/notify/dnotify/dnotify.c | 2 +-
fs/notify/fanotify/fanotify.c | 2 +-
fs/notify/fsnotify.c | 8 ++++----
fs/notify/inotify/inotify.h | 2 +-
fs/notify/inotify/inotify_fsnotify.c | 6 +++---
fs/overlayfs/export.c | 2 +-
include/linux/dcache.h | 2 +-
include/linux/fsnotify.h | 10 +++++-----
include/linux/fsnotify_backend.h | 6 +++---
kernel/audit.h | 2 +-
kernel/audit_fsnotify.c | 2 +-
kernel/audit_tree.c | 2 +-
kernel/audit_watch.c | 4 ++--
kernel/auditfilter.c | 6 +++---
kernel/auditsc.c | 4 ++--
19 files changed, 43 insertions(+), 43 deletions(-)
here...
Pretty similar :)
Let's just go with yours then, since it breaks out some of the strlen
changes into separate patches.
Cheers,
--
Jeff Layton <jlayton(a)kernel.org>
2148
days inactive
2148
days old
linux-audit@lists.linux-audit.osci.io
9 comments
3 participants
participants (3)
-
Al Viro -
Jeff Layton -
Paul Moore