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fsnotify: pass both the vfsmount mark and inode mark

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should_send_event() and handle_event() will both need to look up the inode
event if they get a vfsmount event.  Lets just pass both at the same time
since we have them both after walking the lists in lockstep.

Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Eric Paris
2010-07-28 10:18:39 -04:00
parent 613a807fe7
commit ce8f76fb73
7 changed files with 91 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files
fs/notify/fsnotify.c
+48 -22
View File
@@ -141,28 +141,51 @@ void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
EXPORT_SYMBOL_GPL(__fsnotify_parent);
static int send_to_group(struct inode *to_tell, struct vfsmount *mnt,
struct fsnotify_mark *mark,
__u32 mask, void *data,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data,
int data_is, u32 cookie,
const unsigned char *file_name,
struct fsnotify_event **event)
{
struct fsnotify_group *group = mark->group;
__u32 test_mask = (mask & ~FS_EVENT_ON_CHILD);
struct fsnotify_group *group = inode_mark->group;
__u32 inode_test_mask = (mask & ~FS_EVENT_ON_CHILD);
__u32 vfsmount_test_mask = (mask & ~FS_EVENT_ON_CHILD);
pr_debug("%s: group=%p to_tell=%p mnt=%p mark=%p mask=%x data=%p"
" data_is=%d cookie=%d event=%p\n", __func__, group, to_tell,
mnt, mark, mask, data, data_is, cookie, *event);
mnt, inode_mark, mask, data, data_is, cookie, *event);
if ((mask & FS_MODIFY) &&
!(mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))
mark->ignored_mask = 0;
/* clear ignored on inode modification */
if (mask & FS_MODIFY) {
if (inode_mark &&
!(inode_mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))
inode_mark->ignored_mask = 0;
if (vfsmount_mark &&
!(vfsmount_mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))
vfsmount_mark->ignored_mask = 0;
}
if (!(test_mask & mark->mask & ~mark->ignored_mask))
/* does the inode mark tell us to do something? */
if (inode_mark) {
inode_test_mask &= inode_mark->mask;
inode_test_mask &= ~inode_mark->ignored_mask;
}
/* does the vfsmount_mark tell us to do something? */
if (vfsmount_mark) {
vfsmount_test_mask &= vfsmount_mark->mask;
vfsmount_test_mask &= ~vfsmount_mark->ignored_mask;
if (inode_mark)
vfsmount_test_mask &= ~inode_mark->ignored_mask;
}
if (!inode_test_mask && !vfsmount_test_mask)
return 0;
if (group->ops->should_send_event(group, to_tell, mnt, mark, mask,
data, data_is) == false)
if (group->ops->should_send_event(group, to_tell, mnt, inode_mark,
vfsmount_mark, mask, data,
data_is) == false)
return 0;
if (!*event) {
@@ -172,7 +195,7 @@ static int send_to_group(struct inode *to_tell, struct vfsmount *mnt,
if (!*event)
return -ENOMEM;
}
return group->ops->handle_event(group, mark, *event);
return group->ops->handle_event(group, inode_mark, vfsmount_mark, *event);
}
/*
@@ -213,14 +236,16 @@ int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
if ((mask & FS_MODIFY) ||
(test_mask & to_tell->i_fsnotify_mask))
inode_node = to_tell->i_fsnotify_marks.first;
inode_node = srcu_dereference(to_tell->i_fsnotify_marks.first,
&fsnotify_mark_srcu);
else
inode_node = NULL;
if (mnt) {
if ((mask & FS_MODIFY) ||
(test_mask & mnt->mnt_fsnotify_mask))
vfsmount_node = mnt->mnt_fsnotify_marks.first;
vfsmount_node = srcu_dereference(mnt->mnt_fsnotify_marks.first,
&fsnotify_mark_srcu);
else
vfsmount_node = NULL;
} else {
@@ -245,26 +270,27 @@ int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
if (inode_group < vfsmount_group) {
/* handle inode */
send_to_group(to_tell, NULL, inode_mark, mask, data,
send_to_group(to_tell, NULL, inode_mark, NULL, mask, data,
data_is, cookie, file_name, &event);
used_inode = true;
} else if (vfsmount_group < inode_group) {
send_to_group(to_tell, mnt, vfsmount_mark, mask, data,
send_to_group(to_tell, mnt, NULL, vfsmount_mark, mask, data,
data_is, cookie, file_name, &event);
used_vfsmount = true;
} else {
send_to_group(to_tell, mnt, vfsmount_mark, mask, data,
data_is, cookie, file_name, &event);
send_to_group(to_tell, mnt, inode_mark, vfsmount_mark,
mask, data, data_is, cookie, file_name,
&event);
used_vfsmount = true;
send_to_group(to_tell, NULL, inode_mark, mask, data,
data_is, cookie, file_name, &event);
used_inode = true;
}
if (used_inode)
inode_node = inode_node->next;
inode_node = srcu_dereference(inode_node->next,
&fsnotify_mark_srcu);
if (used_vfsmount)
vfsmount_node = vfsmount_node->next;
vfsmount_node = srcu_dereference(vfsmount_node->next,
&fsnotify_mark_srcu);
}
srcu_read_unlock(&fsnotify_mark_srcu, idx);