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trim fsnotify hooks a bit 

fsnotify_d_move()/__fsnotify_d_instantiate()/__fsnotify_update_dcache_flags()
are identical to each other, regardless of the config.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2016-05-29 18:35:12 -04:00
parent 77d5a6b7d9
commit affda48410
3 changed files with 7 additions and 33 deletions
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8
fs/dcache.c
View File

@ -1769,7 +1769,7 @@ static void __d_instantiate(struct dentry *dentry, struct inode *inode)
raw_write_seqcount_begin(&dentry->d_seq);
__d_set_inode_and_type(dentry, inode, add_flags);
raw_write_seqcount_end(&dentry->d_seq);
__fsnotify_d_instantiate(dentry);
fsnotify_update_flags(dentry);
spin_unlock(&dentry->d_lock);
}
@ -2563,7 +2563,7 @@ static inline void __d_add(struct dentry *dentry, struct inode *inode)
raw_write_seqcount_begin(&dentry->d_seq);
__d_set_inode_and_type(dentry, inode, add_flags);
raw_write_seqcount_end(&dentry->d_seq);
__fsnotify_d_instantiate(dentry);
fsnotify_update_flags(dentry);
}
_d_rehash(dentry);
if (dir)
@ -2853,8 +2853,8 @@ static void __d_move(struct dentry *dentry, struct dentry *target,
list_move(&target->d_child, &target->d_parent->d_subdirs);
list_move(&dentry->d_child, &dentry->d_parent->d_subdirs);
if (exchange)
fsnotify_d_move(target);
fsnotify_d_move(dentry);
fsnotify_update_flags(target);
fsnotify_update_flags(dentry);
}
write_seqcount_end(&target->d_seq);

12
include/linux/fsnotify.h
View File

@ -51,18 +51,6 @@ static inline int fsnotify_perm(struct file *file, int mask)
return fsnotify(inode, fsnotify_mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
}
/*
* fsnotify_d_move - dentry has been moved
*/
static inline void fsnotify_d_move(struct dentry *dentry)
{
/*
* On move we need to update dentry->d_flags to indicate if the new parent
* cares about events from this dentry.
*/
__fsnotify_update_dcache_flags(dentry);
}
/*
* fsnotify_link_count - inode's link count changed
*/

20
include/linux/fsnotify_backend.h
View File

@ -267,10 +267,8 @@ static inline int fsnotify_inode_watches_children(struct inode *inode)
* Update the dentry with a flag indicating the interest of its parent to receive
* filesystem events when those events happens to this dentry->d_inode.
*/
static inline void __fsnotify_update_dcache_flags(struct dentry *dentry)
static inline void fsnotify_update_flags(struct dentry *dentry)
{
struct dentry *parent;
assert_spin_locked(&dentry->d_lock);
/*
@ -280,21 +278,12 @@ static inline void __fsnotify_update_dcache_flags(struct dentry *dentry)
* find our entry, so it will spin until we complete here, and update
* us with the new state.
*/
parent = dentry->d_parent;
if (fsnotify_inode_watches_children(parent->d_inode))
if (fsnotify_inode_watches_children(dentry->d_parent->d_inode))
dentry->d_flags |= DCACHE_FSNOTIFY_PARENT_WATCHED;
else
dentry->d_flags &= ~DCACHE_FSNOTIFY_PARENT_WATCHED;
}
/*
* fsnotify_d_instantiate - instantiate a dentry for inode
*/
static inline void __fsnotify_d_instantiate(struct dentry *dentry)
{
__fsnotify_update_dcache_flags(dentry);
}
/* called from fsnotify listeners, such as fanotify or dnotify */
/* create a new group */
@ -386,10 +375,7 @@ static inline void __fsnotify_inode_delete(struct inode *inode)
static inline void __fsnotify_vfsmount_delete(struct vfsmount *mnt)
{}
static inline void __fsnotify_update_dcache_flags(struct dentry *dentry)
{}
static inline void __fsnotify_d_instantiate(struct dentry *dentry)
static inline void fsnotify_update_flags(struct dentry *dentry)
{}
static inline u32 fsnotify_get_cookie(void)