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dnotify: rename mark_entry to mark
nomenclature change. Used to call things 'entries' but now we just call them 'marks.' Do those changes for dnotify. Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Eric Paris
parent
000285deb9
commit
ef5e2b785f
@ -29,7 +29,7 @@
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int dir_notify_enable __read_mostly = 1;
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static struct kmem_cache *dnotify_struct_cache __read_mostly;
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static struct kmem_cache *dnotify_mark_entry_cache __read_mostly;
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static struct kmem_cache *dnotify_mark_cache __read_mostly;
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static struct fsnotify_group *dnotify_group __read_mostly;
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static DEFINE_MUTEX(dnotify_mark_mutex);
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@ -38,8 +38,8 @@ static DEFINE_MUTEX(dnotify_mark_mutex);
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* is being watched by dnotify. If multiple userspace applications are watching
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* the same directory with dnotify their information is chained in dn
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*/
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struct dnotify_mark_entry {
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struct fsnotify_mark fsn_entry;
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struct dnotify_mark {
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struct fsnotify_mark fsn_mark;
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struct dnotify_struct *dn;
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};
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@ -51,27 +51,27 @@ struct dnotify_mark_entry {
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* it calls the fsnotify function so it can update the set of all events relevant
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* to this inode.
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*/
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static void dnotify_recalc_inode_mask(struct fsnotify_mark *entry)
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static void dnotify_recalc_inode_mask(struct fsnotify_mark *fsn_mark)
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{
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__u32 new_mask, old_mask;
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struct dnotify_struct *dn;
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struct dnotify_mark_entry *dnentry = container_of(entry,
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struct dnotify_mark_entry,
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fsn_entry);
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struct dnotify_mark *dn_mark = container_of(fsn_mark,
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struct dnotify_mark,
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fsn_mark);
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assert_spin_locked(&entry->lock);
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assert_spin_locked(&fsn_mark->lock);
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old_mask = entry->mask;
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old_mask = fsn_mark->mask;
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new_mask = 0;
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for (dn = dnentry->dn; dn != NULL; dn = dn->dn_next)
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for (dn = dn_mark->dn; dn != NULL; dn = dn->dn_next)
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new_mask |= (dn->dn_mask & ~FS_DN_MULTISHOT);
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entry->mask = new_mask;
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fsn_mark->mask = new_mask;
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if (old_mask == new_mask)
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return;
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if (entry->i.inode)
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fsnotify_recalc_inode_mask(entry->i.inode);
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if (fsn_mark->i.inode)
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fsnotify_recalc_inode_mask(fsn_mark->i.inode);
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}
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/*
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@ -85,8 +85,8 @@ static void dnotify_recalc_inode_mask(struct fsnotify_mark *entry)
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static int dnotify_handle_event(struct fsnotify_group *group,
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struct fsnotify_event *event)
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{
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struct fsnotify_mark *entry = NULL;
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struct dnotify_mark_entry *dnentry;
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struct fsnotify_mark *fsn_mark = NULL;
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struct dnotify_mark *dn_mark;
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struct inode *to_tell;
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struct dnotify_struct *dn;
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struct dnotify_struct **prev;
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@ -96,16 +96,16 @@ static int dnotify_handle_event(struct fsnotify_group *group,
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to_tell = event->to_tell;
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spin_lock(&to_tell->i_lock);
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entry = fsnotify_find_mark(group, to_tell);
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fsn_mark = fsnotify_find_mark(group, to_tell);
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spin_unlock(&to_tell->i_lock);
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/* unlikely since we alreay passed dnotify_should_send_event() */
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if (unlikely(!entry))
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if (unlikely(!fsn_mark))
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return 0;
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dnentry = container_of(entry, struct dnotify_mark_entry, fsn_entry);
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dn_mark = container_of(fsn_mark, struct dnotify_mark, fsn_mark);
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spin_lock(&entry->lock);
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prev = &dnentry->dn;
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spin_lock(&fsn_mark->lock);
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prev = &dn_mark->dn;
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while ((dn = *prev) != NULL) {
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if ((dn->dn_mask & test_mask) == 0) {
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prev = &dn->dn_next;
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@ -118,12 +118,12 @@ static int dnotify_handle_event(struct fsnotify_group *group,
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else {
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*prev = dn->dn_next;
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kmem_cache_free(dnotify_struct_cache, dn);
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dnotify_recalc_inode_mask(entry);
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dnotify_recalc_inode_mask(fsn_mark);
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}
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}
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spin_unlock(&entry->lock);
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fsnotify_put_mark(entry);
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spin_unlock(&fsn_mark->lock);
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fsnotify_put_mark(fsn_mark);
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return 0;
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}
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@ -136,7 +136,7 @@ static bool dnotify_should_send_event(struct fsnotify_group *group,
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struct inode *inode, struct vfsmount *mnt,
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__u32 mask, void *data, int data_type)
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{
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struct fsnotify_mark *entry;
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struct fsnotify_mark *fsn_mark;
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bool send;
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/* !dir_notify_enable should never get here, don't waste time checking
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@ -148,30 +148,30 @@ static bool dnotify_should_send_event(struct fsnotify_group *group,
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return false;
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spin_lock(&inode->i_lock);
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entry = fsnotify_find_mark(group, inode);
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fsn_mark = fsnotify_find_mark(group, inode);
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spin_unlock(&inode->i_lock);
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/* no mark means no dnotify watch */
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if (!entry)
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if (!fsn_mark)
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return false;
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mask = (mask & ~FS_EVENT_ON_CHILD);
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send = (mask & entry->mask);
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send = (mask & fsn_mark->mask);
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fsnotify_put_mark(entry); /* matches fsnotify_find_mark */
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fsnotify_put_mark(fsn_mark); /* matches fsnotify_find_mark */
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return send;
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}
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static void dnotify_free_mark(struct fsnotify_mark *entry)
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static void dnotify_free_mark(struct fsnotify_mark *fsn_mark)
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{
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struct dnotify_mark_entry *dnentry = container_of(entry,
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struct dnotify_mark_entry,
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fsn_entry);
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struct dnotify_mark *dn_mark = container_of(fsn_mark,
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struct dnotify_mark,
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fsn_mark);
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BUG_ON(dnentry->dn);
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BUG_ON(dn_mark->dn);
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kmem_cache_free(dnotify_mark_entry_cache, dnentry);
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kmem_cache_free(dnotify_mark_cache, dn_mark);
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}
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static struct fsnotify_ops dnotify_fsnotify_ops = {
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@ -191,8 +191,8 @@ static struct fsnotify_ops dnotify_fsnotify_ops = {
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*/
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void dnotify_flush(struct file *filp, fl_owner_t id)
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{
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struct fsnotify_mark *entry;
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struct dnotify_mark_entry *dnentry;
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struct fsnotify_mark *fsn_mark;
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struct dnotify_mark *dn_mark;
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struct dnotify_struct *dn;
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struct dnotify_struct **prev;
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struct inode *inode;
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@ -202,37 +202,37 @@ void dnotify_flush(struct file *filp, fl_owner_t id)
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return;
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spin_lock(&inode->i_lock);
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entry = fsnotify_find_mark(dnotify_group, inode);
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fsn_mark = fsnotify_find_mark(dnotify_group, inode);
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spin_unlock(&inode->i_lock);
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if (!entry)
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if (!fsn_mark)
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return;
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dnentry = container_of(entry, struct dnotify_mark_entry, fsn_entry);
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dn_mark = container_of(fsn_mark, struct dnotify_mark, fsn_mark);
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mutex_lock(&dnotify_mark_mutex);
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spin_lock(&entry->lock);
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prev = &dnentry->dn;
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spin_lock(&fsn_mark->lock);
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prev = &dn_mark->dn;
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while ((dn = *prev) != NULL) {
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if ((dn->dn_owner == id) && (dn->dn_filp == filp)) {
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*prev = dn->dn_next;
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kmem_cache_free(dnotify_struct_cache, dn);
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dnotify_recalc_inode_mask(entry);
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dnotify_recalc_inode_mask(fsn_mark);
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break;
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}
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prev = &dn->dn_next;
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}
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spin_unlock(&entry->lock);
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spin_unlock(&fsn_mark->lock);
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/* nothing else could have found us thanks to the dnotify_mark_mutex */
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if (dnentry->dn == NULL)
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fsnotify_destroy_mark(entry);
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if (dn_mark->dn == NULL)
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fsnotify_destroy_mark(fsn_mark);
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fsnotify_recalc_group_mask(dnotify_group);
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mutex_unlock(&dnotify_mark_mutex);
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fsnotify_put_mark(entry);
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fsnotify_put_mark(fsn_mark);
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}
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/* this conversion is done only at watch creation */
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@ -264,12 +264,12 @@ static __u32 convert_arg(unsigned long arg)
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* onto that mark. This function either attaches the new dnotify_struct onto
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* that list, or it |= the mask onto an existing dnofiy_struct.
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*/
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static int attach_dn(struct dnotify_struct *dn, struct dnotify_mark_entry *dnentry,
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static int attach_dn(struct dnotify_struct *dn, struct dnotify_mark *dn_mark,
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fl_owner_t id, int fd, struct file *filp, __u32 mask)
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{
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struct dnotify_struct *odn;
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odn = dnentry->dn;
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odn = dn_mark->dn;
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while (odn != NULL) {
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/* adding more events to existing dnofiy_struct? */
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if ((odn->dn_owner == id) && (odn->dn_filp == filp)) {
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@ -284,8 +284,8 @@ static int attach_dn(struct dnotify_struct *dn, struct dnotify_mark_entry *dnent
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dn->dn_fd = fd;
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dn->dn_filp = filp;
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dn->dn_owner = id;
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dn->dn_next = dnentry->dn;
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dnentry->dn = dn;
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dn->dn_next = dn_mark->dn;
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dn_mark->dn = dn;
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return 0;
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}
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@ -297,8 +297,8 @@ static int attach_dn(struct dnotify_struct *dn, struct dnotify_mark_entry *dnent
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*/
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int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
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{
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struct dnotify_mark_entry *new_dnentry, *dnentry;
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struct fsnotify_mark *new_entry, *entry;
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struct dnotify_mark *new_dn_mark, *dn_mark;
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struct fsnotify_mark *new_fsn_mark, *fsn_mark;
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struct dnotify_struct *dn;
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struct inode *inode;
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fl_owner_t id = current->files;
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@ -307,7 +307,7 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
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__u32 mask;
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/* we use these to tell if we need to kfree */
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new_entry = NULL;
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new_fsn_mark = NULL;
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dn = NULL;
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if (!dir_notify_enable) {
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@ -337,8 +337,8 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
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}
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/* new fsnotify mark, we expect most fcntl calls to add a new mark */
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new_dnentry = kmem_cache_alloc(dnotify_mark_entry_cache, GFP_KERNEL);
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if (!new_dnentry) {
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new_dn_mark = kmem_cache_alloc(dnotify_mark_cache, GFP_KERNEL);
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if (!new_dn_mark) {
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error = -ENOMEM;
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goto out_err;
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}
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@ -346,29 +346,29 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
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/* convert the userspace DN_* "arg" to the internal FS_* defines in fsnotify */
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mask = convert_arg(arg);
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/* set up the new_entry and new_dnentry */
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new_entry = &new_dnentry->fsn_entry;
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fsnotify_init_mark(new_entry, dnotify_free_mark);
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new_entry->mask = mask;
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new_dnentry->dn = NULL;
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/* set up the new_fsn_mark and new_dn_mark */
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new_fsn_mark = &new_dn_mark->fsn_mark;
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fsnotify_init_mark(new_fsn_mark, dnotify_free_mark);
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new_fsn_mark->mask = mask;
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new_dn_mark->dn = NULL;
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/* this is needed to prevent the fcntl/close race described below */
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mutex_lock(&dnotify_mark_mutex);
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/* add the new_entry or find an old one. */
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/* add the new_fsn_mark or find an old one. */
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spin_lock(&inode->i_lock);
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entry = fsnotify_find_mark(dnotify_group, inode);
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fsn_mark = fsnotify_find_mark(dnotify_group, inode);
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spin_unlock(&inode->i_lock);
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if (entry) {
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dnentry = container_of(entry, struct dnotify_mark_entry, fsn_entry);
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spin_lock(&entry->lock);
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if (fsn_mark) {
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dn_mark = container_of(fsn_mark, struct dnotify_mark, fsn_mark);
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spin_lock(&fsn_mark->lock);
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} else {
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fsnotify_add_mark(new_entry, dnotify_group, inode, 0);
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spin_lock(&new_entry->lock);
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entry = new_entry;
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dnentry = new_dnentry;
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/* we used new_entry, so don't free it */
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new_entry = NULL;
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fsnotify_add_mark(new_fsn_mark, dnotify_group, inode, 0);
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spin_lock(&new_fsn_mark->lock);
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fsn_mark = new_fsn_mark;
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dn_mark = new_dn_mark;
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/* we used new_fsn_mark, so don't free it */
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new_fsn_mark = NULL;
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}
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rcu_read_lock();
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@ -377,17 +377,17 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
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/* if (f != filp) means that we lost a race and another task/thread
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* actually closed the fd we are still playing with before we grabbed
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* the dnotify_mark_mutex and entry->lock. Since closing the fd is the
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* the dnotify_mark_mutex and fsn_mark->lock. Since closing the fd is the
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* only time we clean up the marks we need to get our mark off
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* the list. */
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if (f != filp) {
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/* if we added ourselves, shoot ourselves, it's possible that
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* the flush actually did shoot this entry. That's fine too
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* the flush actually did shoot this fsn_mark. That's fine too
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* since multiple calls to destroy_mark is perfectly safe, if
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* we found a dnentry already attached to the inode, just sod
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* we found a dn_mark already attached to the inode, just sod
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* off silently as the flush at close time dealt with it.
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*/
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if (dnentry == new_dnentry)
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if (dn_mark == new_dn_mark)
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destroy = 1;
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goto out;
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}
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@ -395,13 +395,13 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
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error = __f_setown(filp, task_pid(current), PIDTYPE_PID, 0);
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if (error) {
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/* if we added, we must shoot */
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if (dnentry == new_dnentry)
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if (dn_mark == new_dn_mark)
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destroy = 1;
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goto out;
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}
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error = attach_dn(dn, dnentry, id, fd, filp, mask);
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/* !error means that we attached the dn to the dnentry, so don't free it */
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error = attach_dn(dn, dn_mark, id, fd, filp, mask);
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/* !error means that we attached the dn to the dn_mark, so don't free it */
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if (!error)
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dn = NULL;
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/* -EEXIST means that we didn't add this new dn and used an old one.
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@ -409,20 +409,20 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
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else if (error == -EEXIST)
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error = 0;
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dnotify_recalc_inode_mask(entry);
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dnotify_recalc_inode_mask(fsn_mark);
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out:
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spin_unlock(&entry->lock);
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spin_unlock(&fsn_mark->lock);
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if (destroy)
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fsnotify_destroy_mark(entry);
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fsnotify_destroy_mark(fsn_mark);
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fsnotify_recalc_group_mask(dnotify_group);
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mutex_unlock(&dnotify_mark_mutex);
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fsnotify_put_mark(entry);
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fsnotify_put_mark(fsn_mark);
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out_err:
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if (new_entry)
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fsnotify_put_mark(new_entry);
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if (new_fsn_mark)
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fsnotify_put_mark(new_fsn_mark);
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if (dn)
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kmem_cache_free(dnotify_struct_cache, dn);
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return error;
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@ -431,7 +431,7 @@ out_err:
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static int __init dnotify_init(void)
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{
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dnotify_struct_cache = KMEM_CACHE(dnotify_struct, SLAB_PANIC);
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dnotify_mark_entry_cache = KMEM_CACHE(dnotify_mark_entry, SLAB_PANIC);
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dnotify_mark_cache = KMEM_CACHE(dnotify_mark, SLAB_PANIC);
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dnotify_group = fsnotify_alloc_group(&dnotify_fsnotify_ops);
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if (IS_ERR(dnotify_group))
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