1 files changed, 251 insertions, 0 deletions

diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
new file mode 100644
index 0000000000..03b8e7932b
--- /dev/null
+++ b/include/linux/fsnotify.h
@@ -0,0 +1,251 @@
+#ifndef _LINUX_FS_NOTIFY_H
+#define _LINUX_FS_NOTIFY_H
+
+/*
+ * include/linux/fsnotify.h - generic hooks for filesystem notification, to
+ * reduce in-source duplication from both dnotify and inotify.
+ *
+ * We don't compile any of this away in some complicated menagerie of ifdefs.
+ * Instead, we rely on the code inside to optimize away as needed.
+ *
+ * (C) Copyright 2005 Robert Love
+ */
+
+#ifdef __KERNEL__
+
+#include <linux/dnotify.h>
+#include <linux/inotify.h>
+
+/*
+ * 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 char *old_name, const char *new_name,
+                                 int isdir, struct inode *target, struct inode *source)
+{
+        u32 cookie = inotify_get_cookie();
+
+        if (old_dir == new_dir)
+                inode_dir_notify(old_dir, DN_RENAME);
+        else {
+                inode_dir_notify(old_dir, DN_DELETE);
+                inode_dir_notify(new_dir, DN_CREATE);
+        }
+
+        if (isdir)
+                isdir = IN_ISDIR;
+        inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir,cookie,old_name);
+        inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, cookie, new_name);
+
+        if (target) {
+                inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL);
+                inotify_inode_is_dead(target);
+        }
+
+        if (source) {
+                inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL);
+        }
+}
+
+/*
+ * fsnotify_nameremove - a filename was removed from a directory
+ */
+static inline void fsnotify_nameremove(struct dentry *dentry, int isdir)
+{
+        if (isdir)
+                isdir = IN_ISDIR;
+        dnotify_parent(dentry, DN_DELETE);
+        inotify_dentry_parent_queue_event(dentry, IN_DELETE|isdir, 0, dentry->d_name.name);
+}
+
+/*
+ * fsnotify_inoderemove - an inode is going away
+ */
+static inline void fsnotify_inoderemove(struct inode *inode)
+{
+        inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL);
+        inotify_inode_is_dead(inode);
+}
+
+/*
+ * fsnotify_create - 'name' was linked in
+ */
+static inline void fsnotify_create(struct inode *inode, const char *name)
+{
+        inode_dir_notify(inode, DN_CREATE);
+        inotify_inode_queue_event(inode, IN_CREATE, 0, name);
+}
+
+/*
+ * fsnotify_mkdir - directory 'name' was created
+ */
+static inline void fsnotify_mkdir(struct inode *inode, const char *name)
+{
+        inode_dir_notify(inode, DN_CREATE);
+        inotify_inode_queue_event(inode, IN_CREATE | IN_ISDIR, 0, name);
+}
+
+/*
+ * fsnotify_access - file was read
+ */
+static inline void fsnotify_access(struct dentry *dentry)
+{
+        struct inode *inode = dentry->d_inode;
+        u32 mask = IN_ACCESS;
+
+        if (S_ISDIR(inode->i_mode))
+                mask |= IN_ISDIR;
+
+        dnotify_parent(dentry, DN_ACCESS);
+        inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
+        inotify_inode_queue_event(inode, mask, 0, NULL);
+}
+
+/*
+ * fsnotify_modify - file was modified
+ */
+static inline void fsnotify_modify(struct dentry *dentry)
+{
+        struct inode *inode = dentry->d_inode;
+        u32 mask = IN_MODIFY;
+
+        if (S_ISDIR(inode->i_mode))
+                mask |= IN_ISDIR;
+
+        dnotify_parent(dentry, DN_MODIFY);
+        inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
+        inotify_inode_queue_event(inode, mask, 0, NULL);
+}
+
+/*
+ * fsnotify_open - file was opened
+ */
+static inline void fsnotify_open(struct dentry *dentry)
+{
+        struct inode *inode = dentry->d_inode;
+        u32 mask = IN_OPEN;
+
+        if (S_ISDIR(inode->i_mode))
+                mask |= IN_ISDIR;
+
+        inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
+        inotify_inode_queue_event(inode, mask, 0, NULL);        
+}
+
+/*
+ * fsnotify_close - file was closed
+ */
+static inline void fsnotify_close(struct file *file)
+{
+        struct dentry *dentry = file->f_dentry;
+        struct inode *inode = dentry->d_inode;
+        const char *name = dentry->d_name.name;
+        mode_t mode = file->f_mode;
+        u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE;
+
+        if (S_ISDIR(inode->i_mode))
+                mask |= IN_ISDIR;
+
+        inotify_dentry_parent_queue_event(dentry, mask, 0, name);
+        inotify_inode_queue_event(inode, mask, 0, NULL);
+}
+
+/*
+ * fsnotify_xattr - extended attributes were changed
+ */
+static inline void fsnotify_xattr(struct dentry *dentry)
+{
+        struct inode *inode = dentry->d_inode;
+        u32 mask = IN_ATTRIB;
+
+        if (S_ISDIR(inode->i_mode))
+                mask |= IN_ISDIR;
+
+        inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
+        inotify_inode_queue_event(inode, mask, 0, NULL);
+}
+
+/*
+ * fsnotify_change - notify_change event.  file was modified and/or metadata
+ * was changed.
+ */
+static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
+{
+        struct inode *inode = dentry->d_inode;
+        int dn_mask = 0;
+        u32 in_mask = 0;
+
+        if (ia_valid & ATTR_UID) {
+                in_mask |= IN_ATTRIB;
+                dn_mask |= DN_ATTRIB;
+        }
+        if (ia_valid & ATTR_GID) {
+                in_mask |= IN_ATTRIB;
+                dn_mask |= DN_ATTRIB;
+        }
+        if (ia_valid & ATTR_SIZE) {
+                in_mask |= IN_MODIFY;
+                dn_mask |= DN_MODIFY;
+        }
+        /* both times implies a utime(s) call */
+        if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME))
+        {
+                in_mask |= IN_ATTRIB;
+                dn_mask |= DN_ATTRIB;
+        } else if (ia_valid & ATTR_ATIME) {
+                in_mask |= IN_ACCESS;
+                dn_mask |= DN_ACCESS;
+        } else if (ia_valid & ATTR_MTIME) {
+                in_mask |= IN_MODIFY;
+                dn_mask |= DN_MODIFY;
+        }
+        if (ia_valid & ATTR_MODE) {
+                in_mask |= IN_ATTRIB;
+                dn_mask |= DN_ATTRIB;
+        }
+
+        if (dn_mask)
+                dnotify_parent(dentry, dn_mask);
+        if (in_mask) {
+                if (S_ISDIR(inode->i_mode))
+                        in_mask |= IN_ISDIR;
+                inotify_inode_queue_event(inode, in_mask, 0, NULL);
+                inotify_dentry_parent_queue_event(dentry, in_mask, 0,
+                                                  dentry->d_name.name);
+        }
+}
+
+#ifdef CONFIG_INOTIFY   /* inotify helpers */
+
+/*
+ * fsnotify_oldname_init - save off the old filename before we change it
+ */
+static inline const char *fsnotify_oldname_init(const char *name)
+{
+        return kstrdup(name, GFP_KERNEL);
+}
+
+/*
+ * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init
+ */
+static inline void fsnotify_oldname_free(const char *old_name)
+{
+        kfree(old_name);
+}
+
+#else   /* CONFIG_INOTIFY */
+
+static inline const char *fsnotify_oldname_init(const char *name)
+{
+        return NULL;
+}
+
+static inline void fsnotify_oldname_free(const char *old_name)
+{
+}
+
+#endif  /* ! CONFIG_INOTIFY */
+
+#endif  /* __KERNEL__ */
+
+#endif  /* _LINUX_FS_NOTIFY_H */