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fsnotify: remove group->mask 

group->mask is now useless.  It was originally a shortcut for fsnotify to
save on performance.  These checks are now redundant, so we remove them.

Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Eric Paris 2010-07-28 10:18:39 -04:00
parent 03930979af
commit 43709a288e
6 changed files with 5 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/notify/dnotify/dnotify.c
View File

@ -199,8 +199,6 @@ void dnotify_flush(struct file *filp, fl_owner_t id)
if (dn_mark->dn == NULL)
fsnotify_destroy_mark(fsn_mark);
fsnotify_recalc_group_mask(dnotify_group);
mutex_unlock(&dnotify_mark_mutex);
fsnotify_put_mark(fsn_mark);
@ -385,8 +383,6 @@ out:
if (destroy)
fsnotify_destroy_mark(fsn_mark);
fsnotify_recalc_group_mask(dnotify_group);
mutex_unlock(&dnotify_mark_mutex);
fsnotify_put_mark(fsn_mark);
out_err:

23
fs/notify/fanotify/fanotify_user.c
View File

@ -496,8 +496,6 @@ static int fanotify_remove_vfsmount_mark(struct fsnotify_group *group,
removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags);
fsnotify_put_mark(fsn_mark);
if (removed & group->mask)
fsnotify_recalc_group_mask(group);
if (removed & mnt->mnt_fsnotify_mask)
fsnotify_recalc_vfsmount_mask(mnt);
@ -518,9 +516,6 @@ static int fanotify_remove_inode_mark(struct fsnotify_group *group,
removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags);
/* matches the fsnotify_find_inode_mark() */
fsnotify_put_mark(fsn_mark);
if (removed & group->mask)
fsnotify_recalc_group_mask(group);
if (removed & inode->i_fsnotify_mask)
fsnotify_recalc_inode_mask(inode);
@ -572,12 +567,9 @@ static int fanotify_add_vfsmount_mark(struct fsnotify_group *group,
}
added = fanotify_mark_add_to_mask(fsn_mark, mask, flags);
fsnotify_put_mark(fsn_mark);
if (added) {
if (added & ~group->mask)
fsnotify_recalc_group_mask(group);
if (added & ~mnt->mnt_fsnotify_mask)
fsnotify_recalc_vfsmount_mask(mnt);
}
if (added & ~mnt->mnt_fsnotify_mask)
fsnotify_recalc_vfsmount_mask(mnt);
return 0;
}
@ -607,12 +599,8 @@ static int fanotify_add_inode_mark(struct fsnotify_group *group,
}
added = fanotify_mark_add_to_mask(fsn_mark, mask, flags);
fsnotify_put_mark(fsn_mark);
if (added) {
if (added & ~group->mask)
fsnotify_recalc_group_mask(group);
if (added & ~inode->i_fsnotify_mask)
fsnotify_recalc_inode_mask(inode);
}
if (added & ~inode->i_fsnotify_mask)
fsnotify_recalc_inode_mask(inode);
return 0;
}
@ -734,7 +722,6 @@ SYSCALL_DEFINE(fanotify_mark)(int fanotify_fd, unsigned int flags,
fsnotify_clear_vfsmount_marks_by_group(group);
else
fsnotify_clear_inode_marks_by_group(group);
fsnotify_recalc_group_mask(group);
break;
default:
ret = -EINVAL;

16
fs/notify/group.c
View File

@ -35,22 +35,6 @@ LIST_HEAD(fsnotify_inode_groups);
/* all groups registered to receive mount point filesystem notifications */
LIST_HEAD(fsnotify_vfsmount_groups);
/*
* Update the group->mask by running all of the marks associated with this
* group and finding the bitwise | of all of the mark->mask.
*/
void fsnotify_recalc_group_mask(struct fsnotify_group *group)
{
__u32 mask = 0;
struct fsnotify_mark *mark;
spin_lock(&group->mark_lock);
list_for_each_entry(mark, &group->marks_list, g_list)
mask |= mark->mask;
group->mask = mask;
spin_unlock(&group->mark_lock);
}
void fsnotify_add_vfsmount_group(struct fsnotify_group *group)
{
struct fsnotify_group *group_iter;

9
fs/notify/inotify/inotify_user.c
View File

@ -606,16 +606,11 @@ static int inotify_update_existing_watch(struct fsnotify_group *group,
int dropped = (old_mask & ~new_mask);
/* more bits in this fsn_mark than the inode's mask? */
int do_inode = (new_mask & ~inode->i_fsnotify_mask);
/* more bits in this fsn_mark than the group? */
int do_group = (new_mask & ~group->mask);
/* update the inode with this new fsn_mark */
if (dropped || do_inode)
fsnotify_recalc_inode_mask(inode);
/* update the group mask with the new mask */
if (dropped || do_group)
fsnotify_recalc_group_mask(group);
}
/* return the wd */
@ -673,10 +668,6 @@ static int inotify_new_watch(struct fsnotify_group *group,
/* return the watch descriptor for this new mark */
ret = tmp_i_mark->wd;
/* if this mark added a new event update the group mask */
if (mask & ~group->mask)
fsnotify_recalc_group_mask(group);
out_err:
/* match the ref from fsnotify_init_mark() */
fsnotify_put_mark(&tmp_i_mark->fsn_mark);

11
include/linux/fsnotify_backend.h
View File

@ -119,15 +119,6 @@ struct fsnotify_group {
*/
struct list_head vfsmount_group_list;
/*
* Defines all of the event types in which this group is interested.
* This mask is a bitwise OR of the FS_* events from above. Each time
* this mask changes for a group (if it changes) the correct functions
* must be called to update the global structures which indicate global
* interest in event types.
*/
__u32 mask;
/*
* How the refcnt is used is up to each group. When the refcnt hits 0
* fsnotify will clean up all of the resources associated with this group.
@ -367,8 +358,6 @@ static inline void __fsnotify_d_instantiate(struct dentry *dentry, struct inode
/* get a reference to an existing or create a new group */
extern struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops);
/* run all marks associated with this group and update group->mask */
extern void fsnotify_recalc_group_mask(struct fsnotify_group *group);
/* drop reference on a group from fsnotify_alloc_group */
extern void fsnotify_put_group(struct fsnotify_group *group);

8
kernel/audit_watch.c
View File

@ -164,8 +164,6 @@ static struct audit_parent *audit_init_parent(struct nameidata *ndp)
return ERR_PTR(ret);
}
fsnotify_recalc_group_mask(audit_watch_group);
return parent;
}
@ -352,9 +350,6 @@ static void audit_remove_parent_watches(struct audit_parent *parent)
mutex_unlock(&audit_filter_mutex);
fsnotify_destroy_mark(&parent->mark);
fsnotify_recalc_group_mask(audit_watch_group);
}
/* Get path information necessary for adding watches. */
@ -505,9 +500,6 @@ void audit_remove_watch_rule(struct audit_krule *krule)
audit_put_parent(parent);
}
}
fsnotify_recalc_group_mask(audit_watch_group);
}
static bool audit_watch_should_send_event(struct fsnotify_group *group, struct inode *inode,