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fsnotify: put inode specific fields in an fsnotify_mark in a union

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The addition of marks on vfs mounts will be simplified if the inode
specific parts of a mark and the vfsmnt specific parts of a mark are
actually in a union so naming can be easy.  This patch just implements the
inode struct and the union.

Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Eric Paris
2009-12-17 21:24:23 -05:00
parent 3a9fb89f4c
commit 2823e04de4
6 changed files with 43 additions and 34 deletions
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17
include/linux/fsnotify_backend.h
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@ -226,6 +226,15 @@ struct fsnotify_event {
struct list_head private_data_list; /* groups can store private data here */
};
/*
* Inode specific fields in an fsnotify_mark_entry
*/
struct fsnotify_inode_mark {
struct inode *inode; /* inode this entry is associated with */
struct hlist_node i_list; /* list of mark_entries by inode->i_fsnotify_mark_entries */
struct list_head free_i_list; /* tmp list used when freeing this mark */
};
/*
* a mark is simply an entry attached to an in core inode which allows an
* fsnotify listener to indicate they are either no longer interested in events
@ -241,12 +250,12 @@ struct fsnotify_mark_entry {
/* we hold ref for each i_list and g_list. also one ref for each 'thing'
* in kernel that found and may be using this mark. */
atomic_t refcnt; /* active things looking at this mark */
struct inode *inode; /* inode this entry is associated with */
struct fsnotify_group *group; /* group this mark entry is for */
struct hlist_node i_list; /* list of mark_entries by inode->i_fsnotify_mark_entries */
struct list_head g_list; /* list of mark_entries by group->i_fsnotify_mark_entries */
spinlock_t lock; /* protect group, inode, and killme */
struct list_head free_i_list; /* tmp list used when freeing this mark */
spinlock_t lock; /* protect group and inode */
union {
struct fsnotify_inode_mark i;
};
struct list_head free_g_list; /* tmp list used when freeing this mark */
void (*free_mark)(struct fsnotify_mark_entry *entry); /* called on final put+free */
};