fsnotify: rename mark_entry to just mark
previously I used mark_entry when talking about marks on inodes. The _entry is pretty useless. Just use "mark" instead. Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Eric Paris
Родитель
d07754412f
Коммит
841bdc10f5
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@ -74,11 +74,11 @@ void fsnotify_recalc_group_mask(struct fsnotify_group *group)
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{
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__u32 mask = 0;
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__u32 old_mask = group->mask;
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struct fsnotify_mark *entry;
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struct fsnotify_mark *mark;
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spin_lock(&group->mark_lock);
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list_for_each_entry(entry, &group->marks_list, g_list)
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mask |= entry->mask;
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list_for_each_entry(mark, &group->marks_list, g_list)
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mask |= mark->mask;
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spin_unlock(&group->mark_lock);
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group->mask = mask;
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@ -30,21 +30,21 @@
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* There are 3 spinlocks involved with fsnotify inode marks and they MUST
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* be taken in order as follows:
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*
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* entry->lock
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* mark->lock
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* group->mark_lock
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* inode->i_lock
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*
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* entry->lock protects 2 things, entry->group and entry->inode. You must hold
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* mark->lock protects 2 things, mark->group and mark->inode. You must hold
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* that lock to dereference either of these things (they could be NULL even with
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* the lock)
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*
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* group->mark_lock protects the marks_list anchored inside a given group
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* and each entry is hooked via the g_list. It also sorta protects the
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* and each mark is hooked via the g_list. It also sorta protects the
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* free_g_list, which when used is anchored by a private list on the stack of the
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* task which held the group->mark_lock.
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*
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* inode->i_lock protects the i_fsnotify_marks list anchored inside a
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* given inode and each entry is hooked via the i_list. (and sorta the
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* given inode and each mark is hooked via the i_list. (and sorta the
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* free_i_list)
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*
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*
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@ -95,15 +95,15 @@
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#include <linux/fsnotify_backend.h>
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#include "fsnotify.h"
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void fsnotify_get_mark(struct fsnotify_mark *entry)
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void fsnotify_get_mark(struct fsnotify_mark *mark)
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{
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atomic_inc(&entry->refcnt);
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atomic_inc(&mark->refcnt);
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}
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void fsnotify_put_mark(struct fsnotify_mark *entry)
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void fsnotify_put_mark(struct fsnotify_mark *mark)
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{
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if (atomic_dec_and_test(&entry->refcnt))
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entry->free_mark(entry);
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if (atomic_dec_and_test(&mark->refcnt))
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mark->free_mark(mark);
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}
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/*
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@ -111,14 +111,14 @@ void fsnotify_put_mark(struct fsnotify_mark *entry)
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*/
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static void fsnotify_recalc_inode_mask_locked(struct inode *inode)
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{
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struct fsnotify_mark *entry;
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struct fsnotify_mark *mark;
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struct hlist_node *pos;
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__u32 new_mask = 0;
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assert_spin_locked(&inode->i_lock);
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hlist_for_each_entry(entry, pos, &inode->i_fsnotify_marks, i.i_list)
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new_mask |= entry->mask;
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hlist_for_each_entry(mark, pos, &inode->i_fsnotify_marks, i.i_list)
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new_mask |= mark->mask;
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inode->i_fsnotify_mask = new_mask;
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}
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@ -138,40 +138,40 @@ void fsnotify_recalc_inode_mask(struct inode *inode)
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/*
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* Any time a mark is getting freed we end up here.
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* The caller had better be holding a reference to this mark so we don't actually
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* do the final put under the entry->lock
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* do the final put under the mark->lock
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*/
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void fsnotify_destroy_mark(struct fsnotify_mark *entry)
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void fsnotify_destroy_mark(struct fsnotify_mark *mark)
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{
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struct fsnotify_group *group;
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struct inode *inode;
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spin_lock(&entry->lock);
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spin_lock(&mark->lock);
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group = entry->group;
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inode = entry->i.inode;
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group = mark->group;
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inode = mark->i.inode;
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BUG_ON(group && !inode);
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BUG_ON(!group && inode);
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/* if !group something else already marked this to die */
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if (!group) {
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spin_unlock(&entry->lock);
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spin_unlock(&mark->lock);
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return;
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}
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/* 1 from caller and 1 for being on i_list/g_list */
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BUG_ON(atomic_read(&entry->refcnt) < 2);
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BUG_ON(atomic_read(&mark->refcnt) < 2);
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spin_lock(&group->mark_lock);
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spin_lock(&inode->i_lock);
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hlist_del_init(&entry->i.i_list);
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entry->i.inode = NULL;
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hlist_del_init(&mark->i.i_list);
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mark->i.inode = NULL;
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list_del_init(&entry->g_list);
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entry->group = NULL;
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list_del_init(&mark->g_list);
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mark->group = NULL;
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fsnotify_put_mark(entry); /* for i_list and g_list */
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fsnotify_put_mark(mark); /* for i_list and g_list */
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/*
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* this mark is now off the inode->i_fsnotify_marks list and we
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@ -182,21 +182,21 @@ void fsnotify_destroy_mark(struct fsnotify_mark *entry)
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spin_unlock(&inode->i_lock);
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spin_unlock(&group->mark_lock);
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spin_unlock(&entry->lock);
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spin_unlock(&mark->lock);
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/*
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* Some groups like to know that marks are being freed. This is a
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* callback to the group function to let it know that this entry
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* callback to the group function to let it know that this mark
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* is being freed.
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*/
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if (group->ops->freeing_mark)
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group->ops->freeing_mark(entry, group);
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group->ops->freeing_mark(mark, group);
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/*
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* __fsnotify_update_child_dentry_flags(inode);
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*
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* I really want to call that, but we can't, we have no idea if the inode
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* still exists the second we drop the entry->lock.
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* still exists the second we drop the mark->lock.
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*
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* The next time an event arrive to this inode from one of it's children
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* __fsnotify_parent will see that the inode doesn't care about it's
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@ -221,20 +221,20 @@ void fsnotify_destroy_mark(struct fsnotify_mark *entry)
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*/
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void fsnotify_clear_marks_by_group(struct fsnotify_group *group)
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{
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struct fsnotify_mark *lentry, *entry;
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struct fsnotify_mark *lmark, *mark;
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LIST_HEAD(free_list);
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spin_lock(&group->mark_lock);
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list_for_each_entry_safe(entry, lentry, &group->marks_list, g_list) {
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list_add(&entry->free_g_list, &free_list);
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list_del_init(&entry->g_list);
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fsnotify_get_mark(entry);
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list_for_each_entry_safe(mark, lmark, &group->marks_list, g_list) {
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list_add(&mark->free_g_list, &free_list);
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list_del_init(&mark->g_list);
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fsnotify_get_mark(mark);
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}
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spin_unlock(&group->mark_lock);
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list_for_each_entry_safe(entry, lentry, &free_list, free_g_list) {
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fsnotify_destroy_mark(entry);
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fsnotify_put_mark(entry);
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list_for_each_entry_safe(mark, lmark, &free_list, free_g_list) {
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fsnotify_destroy_mark(mark);
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fsnotify_put_mark(mark);
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}
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}
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@ -243,21 +243,21 @@ void fsnotify_clear_marks_by_group(struct fsnotify_group *group)
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*/
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void fsnotify_clear_marks_by_inode(struct inode *inode)
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{
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struct fsnotify_mark *entry, *lentry;
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struct fsnotify_mark *mark, *lmark;
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struct hlist_node *pos, *n;
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LIST_HEAD(free_list);
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spin_lock(&inode->i_lock);
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hlist_for_each_entry_safe(entry, pos, n, &inode->i_fsnotify_marks, i.i_list) {
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list_add(&entry->i.free_i_list, &free_list);
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hlist_del_init(&entry->i.i_list);
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fsnotify_get_mark(entry);
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hlist_for_each_entry_safe(mark, pos, n, &inode->i_fsnotify_marks, i.i_list) {
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list_add(&mark->i.free_i_list, &free_list);
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hlist_del_init(&mark->i.i_list);
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fsnotify_get_mark(mark);
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}
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spin_unlock(&inode->i_lock);
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list_for_each_entry_safe(entry, lentry, &free_list, i.free_i_list) {
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fsnotify_destroy_mark(entry);
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fsnotify_put_mark(entry);
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list_for_each_entry_safe(mark, lmark, &free_list, i.free_i_list) {
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fsnotify_destroy_mark(mark);
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fsnotify_put_mark(mark);
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}
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}
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@ -268,15 +268,15 @@ void fsnotify_clear_marks_by_inode(struct inode *inode)
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struct fsnotify_mark *fsnotify_find_mark(struct fsnotify_group *group,
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struct inode *inode)
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{
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struct fsnotify_mark *entry;
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struct fsnotify_mark *mark;
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struct hlist_node *pos;
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assert_spin_locked(&inode->i_lock);
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hlist_for_each_entry(entry, pos, &inode->i_fsnotify_marks, i.i_list) {
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if (entry->group == group) {
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fsnotify_get_mark(entry);
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return entry;
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hlist_for_each_entry(mark, pos, &inode->i_fsnotify_marks, i.i_list) {
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if (mark->group == group) {
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fsnotify_get_mark(mark);
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return mark;
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}
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}
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return NULL;
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@ -294,35 +294,35 @@ void fsnotify_duplicate_mark(struct fsnotify_mark *new, struct fsnotify_mark *ol
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/*
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* Nothing fancy, just initialize lists and locks and counters.
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*/
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void fsnotify_init_mark(struct fsnotify_mark *entry,
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void (*free_mark)(struct fsnotify_mark *entry))
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void fsnotify_init_mark(struct fsnotify_mark *mark,
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void (*free_mark)(struct fsnotify_mark *mark))
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{
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spin_lock_init(&entry->lock);
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atomic_set(&entry->refcnt, 1);
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INIT_HLIST_NODE(&entry->i.i_list);
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entry->group = NULL;
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entry->mask = 0;
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entry->i.inode = NULL;
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entry->free_mark = free_mark;
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spin_lock_init(&mark->lock);
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atomic_set(&mark->refcnt, 1);
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INIT_HLIST_NODE(&mark->i.i_list);
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mark->group = NULL;
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mark->mask = 0;
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mark->i.inode = NULL;
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mark->free_mark = free_mark;
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}
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/*
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* Attach an initialized mark entry to a given group and inode.
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* Attach an initialized mark mark to a given group and inode.
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* These marks may be used for the fsnotify backend to determine which
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* event types should be delivered to which group and for which inodes.
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*/
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int fsnotify_add_mark(struct fsnotify_mark *entry,
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int fsnotify_add_mark(struct fsnotify_mark *mark,
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struct fsnotify_group *group, struct inode *inode,
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int allow_dups)
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{
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struct fsnotify_mark *lentry = NULL;
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struct fsnotify_mark *lmark = NULL;
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int ret = 0;
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inode = igrab(inode);
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if (unlikely(!inode))
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return -EINVAL;
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entry->flags = FSNOTIFY_MARK_FLAG_INODE;
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mark->flags = FSNOTIFY_MARK_FLAG_INODE;
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/*
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* if this group isn't being testing for inode type events we need
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@ -340,24 +340,24 @@ int fsnotify_add_mark(struct fsnotify_mark *entry,
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/*
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* LOCKING ORDER!!!!
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* entry->lock
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* mark->lock
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* group->mark_lock
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* inode->i_lock
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*/
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spin_lock(&entry->lock);
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spin_lock(&mark->lock);
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spin_lock(&group->mark_lock);
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spin_lock(&inode->i_lock);
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if (!allow_dups)
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lentry = fsnotify_find_mark(group, inode);
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if (!lentry) {
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entry->group = group;
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entry->i.inode = inode;
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lmark = fsnotify_find_mark(group, inode);
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if (!lmark) {
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mark->group = group;
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mark->i.inode = inode;
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hlist_add_head(&entry->i.i_list, &inode->i_fsnotify_marks);
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list_add(&entry->g_list, &group->marks_list);
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hlist_add_head(&mark->i.i_list, &inode->i_fsnotify_marks);
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list_add(&mark->g_list, &group->marks_list);
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fsnotify_get_mark(entry); /* for i_list and g_list */
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fsnotify_get_mark(mark); /* for i_list and g_list */
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atomic_inc(&group->num_marks);
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@ -366,12 +366,12 @@ int fsnotify_add_mark(struct fsnotify_mark *entry,
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spin_unlock(&inode->i_lock);
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spin_unlock(&group->mark_lock);
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spin_unlock(&entry->lock);
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spin_unlock(&mark->lock);
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if (lentry) {
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if (lmark) {
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ret = -EEXIST;
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iput(inode);
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fsnotify_put_mark(lentry);
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fsnotify_put_mark(lmark);
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} else {
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__fsnotify_update_child_dentry_flags(inode);
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}
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@ -83,7 +83,7 @@ struct fsnotify_ops {
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int data_type);
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int (*handle_event)(struct fsnotify_group *group, struct fsnotify_event *event);
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void (*free_group_priv)(struct fsnotify_group *group);
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void (*freeing_mark)(struct fsnotify_mark *entry, struct fsnotify_group *group);
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void (*freeing_mark)(struct fsnotify_mark *mark, struct fsnotify_group *group);
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void (*free_event_priv)(struct fsnotify_event_private_data *priv);
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};
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@ -135,7 +135,7 @@ struct fsnotify_group {
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/* stores all fastpath marks assoc with this group so they can be cleaned on unregister */
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spinlock_t mark_lock; /* protect marks_list */
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atomic_t num_marks; /* 1 for each mark entry and 1 for not being
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atomic_t num_marks; /* 1 for each mark and 1 for not being
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* past the point of no return when freeing
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* a group */
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struct list_head marks_list; /* all inode marks for this group */
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@ -229,7 +229,7 @@ struct fsnotify_event {
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* Inode specific fields in an fsnotify_mark
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*/
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struct fsnotify_inode_mark {
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struct inode *inode; /* inode this entry is associated with */
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struct inode *inode; /* inode this mark is associated with */
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struct hlist_node i_list; /* list of marks by inode->i_fsnotify_marks */
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struct list_head free_i_list; /* tmp list used when freeing this mark */
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};
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@ -238,13 +238,13 @@ struct fsnotify_inode_mark {
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* Mount point specific fields in an fsnotify_mark
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*/
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struct fsnotify_vfsmount_mark {
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struct vfsmount *mnt; /* inode this entry is associated with */
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struct vfsmount *mnt; /* vfsmount this mark is associated with */
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struct hlist_node m_list; /* list of marks by inode->i_fsnotify_marks */
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struct list_head free_m_list; /* tmp list used when freeing this mark */
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};
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/*
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* a mark is simply an entry attached to an in core inode which allows an
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* a mark is simply an object attached to an in core inode which allows an
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* fsnotify listener to indicate they are either no longer interested in events
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* of a type matching mask or only interested in those events.
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*
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@ -254,11 +254,11 @@ struct fsnotify_vfsmount_mark {
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* inode eviction or modification.
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*/
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struct fsnotify_mark {
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__u32 mask; /* mask this mark entry is for */
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__u32 mask; /* mask this mark is for */
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/* we hold ref for each i_list and g_list. also one ref for each 'thing'
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* in kernel that found and may be using this mark. */
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atomic_t refcnt; /* active things looking at this mark */
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struct fsnotify_group *group; /* group this mark entry is for */
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struct fsnotify_group *group; /* group this mark is for */
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struct list_head g_list; /* list of marks by group->i_fsnotify_marks */
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spinlock_t lock; /* protect group and inode */
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union {
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@ -269,7 +269,7 @@ struct fsnotify_mark {
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#define FSNOTIFY_MARK_FLAG_INODE 0x01
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#define FSNOTIFY_MARK_FLAG_VFSMOUNT 0x02
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unsigned int flags; /* vfsmount or inode mark? */
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void (*free_mark)(struct fsnotify_mark *entry); /* called on final put+free */
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void (*free_mark)(struct fsnotify_mark *mark); /* called on final put+free */
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};
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#ifdef CONFIG_FSNOTIFY
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@ -361,19 +361,19 @@ extern struct fsnotify_event *fsnotify_remove_notify_event(struct fsnotify_group
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/* run all marks associated with an inode and update inode->i_fsnotify_mask */
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extern void fsnotify_recalc_inode_mask(struct inode *inode);
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extern void fsnotify_init_mark(struct fsnotify_mark *entry, void (*free_mark)(struct fsnotify_mark *entry));
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extern void fsnotify_init_mark(struct fsnotify_mark *mark, void (*free_mark)(struct fsnotify_mark *mark));
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/* find (and take a reference) to a mark associated with group and inode */
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extern struct fsnotify_mark *fsnotify_find_mark(struct fsnotify_group *group, struct inode *inode);
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/* copy the values from old into new */
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extern void fsnotify_duplicate_mark(struct fsnotify_mark *new, struct fsnotify_mark *old);
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/* attach the mark to both the group and the inode */
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extern int fsnotify_add_mark(struct fsnotify_mark *entry, struct fsnotify_group *group, struct inode *inode, int allow_dups);
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extern int fsnotify_add_mark(struct fsnotify_mark *mark, struct fsnotify_group *group, struct inode *inode, int allow_dups);
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/* given a mark, flag it to be freed when all references are dropped */
|
||||
extern void fsnotify_destroy_mark(struct fsnotify_mark *entry);
|
||||
extern void fsnotify_destroy_mark(struct fsnotify_mark *mark);
|
||||
/* run all the marks in a group, and flag them to be freed */
|
||||
extern void fsnotify_clear_marks_by_group(struct fsnotify_group *group);
|
||||
extern void fsnotify_get_mark(struct fsnotify_mark *entry);
|
||||
extern void fsnotify_put_mark(struct fsnotify_mark *entry);
|
||||
extern void fsnotify_get_mark(struct fsnotify_mark *mark);
|
||||
extern void fsnotify_put_mark(struct fsnotify_mark *mark);
|
||||
extern void fsnotify_unmount_inodes(struct list_head *list);
|
||||
|
||||
/* put here because inotify does some weird stuff when destroying watches */
|
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