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fanotify: use both marks when possible

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fanotify currently, when given a vfsmount_mark will look up (if it exists)
the corresponding inode mark.  This patch drops that lookup and uses the
mark provided.

Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Eric Paris 2010-07-28 10:18:39 -04:00
parent ce8f76fb73
commit 1968f5eed5
7 changed files with 41 additions and 61 deletions
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2
fs/notify/dnotify/dnotify.c
View File

@ -128,7 +128,7 @@ static int dnotify_handle_event(struct fsnotify_group *group,
* userspace notification for that pair.
*/
static bool dnotify_should_send_event(struct fsnotify_group *group,
struct inode *inode, struct vfsmount *mnt,
struct inode *inode,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data, int data_type)

88
fs/notify/fanotify/fanotify.c
View File

@ -153,59 +153,20 @@ static int fanotify_handle_event(struct fsnotify_group *group,
return ret;
}
static bool should_send_vfsmount_event(struct fsnotify_group *group,
struct vfsmount *mnt,
struct inode *inode,
struct fsnotify_mark *mnt_mark,
__u32 mask)
{
struct fsnotify_mark *inode_mark;
pr_debug("%s: group=%p vfsmount=%p mark=%p mask=%x\n",
__func__, group, mnt, mnt_mark, mask);
mask &= mnt_mark->mask;
mask &= ~mnt_mark->ignored_mask;
if (mask) {
inode_mark = fsnotify_find_inode_mark(group, inode);
if (inode_mark) {
mask &= ~inode_mark->ignored_mask;
fsnotify_put_mark(inode_mark);
}
}
return mask;
}
static bool should_send_inode_event(struct fsnotify_group *group,
struct inode *inode,
struct fsnotify_mark *mark,
__u32 mask)
{
pr_debug("%s: group=%p inode=%p mark=%p mask=%x\n",
__func__, group, inode, mark, mask);
/*
* if the event is for a child and this inode doesn't care about
* events on the child, don't send it!
*/
if ((mask & FS_EVENT_ON_CHILD) &&
!(mark->mask & FS_EVENT_ON_CHILD))
return false;
else
return true;
}
static bool fanotify_should_send_event(struct fsnotify_group *group,
struct inode *to_tell,
struct vfsmount *mnt,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data, int data_type)
struct fsnotify_mark *vfsmnt_mark,
__u32 event_mask, void *data, int data_type)
{
pr_debug("%s: group=%p to_tell=%p mnt=%p mask=%x data=%p data_type=%d\n",
__func__, group, to_tell, mnt, mask, data, data_type);
__u32 marks_mask, marks_ignored_mask;
pr_debug("%s: group=%p to_tell=%p inode_mark=%p vfsmnt_mark=%p "
"mask=%x data=%p data_type=%d\n", __func__, group, to_tell,
inode_mark, vfsmnt_mark, event_mask, data, data_type);
pr_debug("%s: group=%p vfsmount_mark=%p inode_mark=%p mask=%x\n",
__func__, group, vfsmnt_mark, inode_mark, event_mask);
/* sorry, fanotify only gives a damn about files and dirs */
if (!S_ISREG(to_tell->i_mode) &&
@ -216,11 +177,30 @@ static bool fanotify_should_send_event(struct fsnotify_group *group,
if (data_type != FSNOTIFY_EVENT_FILE)
return false;
if (mnt)
return should_send_vfsmount_event(group, mnt, to_tell,
vfsmount_mark, mask);
else
return should_send_inode_event(group, to_tell, inode_mark, mask);
if (inode_mark && vfsmnt_mark) {
marks_mask = (vfsmnt_mark->mask | inode_mark->mask);
marks_ignored_mask = (vfsmnt_mark->ignored_mask | inode_mark->ignored_mask);
} else if (inode_mark) {
/*
* if the event is for a child and this inode doesn't care about
* events on the child, don't send it!
*/
if ((event_mask & FS_EVENT_ON_CHILD) &&
!(inode_mark->mask & FS_EVENT_ON_CHILD))
return false;
marks_mask = inode_mark->mask;
marks_ignored_mask = inode_mark->ignored_mask;
} else if (vfsmnt_mark) {
marks_mask = vfsmnt_mark->mask;
marks_ignored_mask = vfsmnt_mark->ignored_mask;
} else {
BUG();
}
if (event_mask & marks_mask & ~marks_ignored_mask)
return true;
return false;
}
const struct fsnotify_ops fanotify_fsnotify_ops = {

2
fs/notify/fsnotify.c
View File

@ -183,7 +183,7 @@ static int send_to_group(struct inode *to_tell, struct vfsmount *mnt,
if (!inode_test_mask && !vfsmount_test_mask)
return 0;
if (group->ops->should_send_event(group, to_tell, mnt, inode_mark,
if (group->ops->should_send_event(group, to_tell, inode_mark,
vfsmount_mark, mask, data,
data_is) == false)
return 0;

4
fs/notify/inotify/inotify_fsnotify.c
View File

@ -142,11 +142,11 @@ static void inotify_freeing_mark(struct fsnotify_mark *fsn_mark, struct fsnotify
}
static bool inotify_should_send_event(struct fsnotify_group *group, struct inode *inode,
struct vfsmount *mnt, struct fsnotify_mark *mark,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data, int data_type)
{
if ((mark->mask & FS_EXCL_UNLINK) &&
if ((inode_mark->mask & FS_EXCL_UNLINK) &&
(data_type == FSNOTIFY_EVENT_FILE)) {
struct file *file = data;

2
include/linux/fsnotify_backend.h
View File

@ -92,7 +92,7 @@ struct fsnotify_event_private_data;
*/
struct fsnotify_ops {
bool (*should_send_event)(struct fsnotify_group *group, struct inode *inode,
struct vfsmount *mnt, struct fsnotify_mark *inode_mark,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data, int data_type);
int (*handle_event)(struct fsnotify_group *group,

2
kernel/audit_tree.c
View File

@ -921,7 +921,7 @@ static void audit_tree_freeing_mark(struct fsnotify_mark *entry, struct fsnotify
}
static bool audit_tree_send_event(struct fsnotify_group *group, struct inode *inode,
struct vfsmount *mnt, struct fsnotify_mark *inode_mark,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data, int data_type)
{

2
kernel/audit_watch.c
View File

@ -503,7 +503,7 @@ void audit_remove_watch_rule(struct audit_krule *krule)
}
static bool audit_watch_should_send_event(struct fsnotify_group *group, struct inode *inode,
struct vfsmount *mnt, struct fsnotify_mark *inode_mark,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data, int data_type)
{