AcoSail/kernel_optimize_test
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fsnotify: move fsnotify_nameremove() hook out of d_delete()

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d_delete() was piggy backed for the fsnotify_nameremove() hook when
in fact not all callers of d_delete() care about fsnotify events.

For all callers of d_delete() that may be interested in fsnotify events,
we made sure to call one of fsnotify_{unlink,rmdir}() hooks before
calling d_delete().

Now we can move the fsnotify_nameremove() call from d_delete() to the
fsnotify_{unlink,rmdir}() hooks.

Two explicit calls to fsnotify_nameremove() from nfs/afs sillyrename
are also removed. This will cause a change of behavior - nfs/afs will
NOT generate an fsnotify delete event when renaming over a positive
dentry.  This change is desirable, because it is consistent with the
behavior of all other filesystems.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Amir Goldstein 2019-05-26 17:34:10 +03:00 committed by Jan Kara
parent 6146e78c03
commit 49246466a9
4 changed files with 2 additions and 13 deletions
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5
fs/afs/dir_silly.c
View File

@ -60,11 +60,6 @@ static int afs_do_silly_rename(struct afs_vnode *dvnode, struct afs_vnode *vnode
if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
afs_edit_dir_add(dvnode, &new->d_name,
&vnode->fid, afs_edit_dir_for_silly_1);
/* vfs_unlink and the like do not issue this when a file is
* sillyrenamed, so do it here.
*/
fsnotify_nameremove(old, 0);
}
kfree(scb);

2
fs/dcache.c
View File

@ -2372,7 +2372,6 @@ EXPORT_SYMBOL(d_hash_and_lookup);
void d_delete(struct dentry * dentry)
{
struct inode *inode = dentry->d_inode;
int isdir = d_is_dir(dentry);
spin_lock(&inode->i_lock);
spin_lock(&dentry->d_lock);
@ -2387,7 +2386,6 @@ void d_delete(struct dentry * dentry)
spin_unlock(&dentry->d_lock);
spin_unlock(&inode->i_lock);
}
fsnotify_nameremove(dentry, isdir);
}
EXPORT_SYMBOL(d_delete);

6
fs/nfs/unlink.c
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@ -396,12 +396,6 @@ nfs_complete_sillyrename(struct rpc_task *task, struct nfs_renamedata *data)
nfs_cancel_async_unlink(dentry);
return;
}
/*
* vfs_unlink and the like do not issue this when a file is
* sillyrenamed, so do it here.
*/
fsnotify_nameremove(dentry, 0);
}
#define SILLYNAME_PREFIX ".nfs"

2
include/linux/fsnotify.h
View File

@ -199,6 +199,7 @@ static inline void fsnotify_unlink(struct inode *dir, struct dentry *dentry)
WARN_ON_ONCE(d_is_negative(dentry));
/* TODO: call fsnotify_dirent() */
fsnotify_nameremove(dentry, 0);
}
/*
@ -222,6 +223,7 @@ static inline void fsnotify_rmdir(struct inode *dir, struct dentry *dentry)
WARN_ON_ONCE(d_is_negative(dentry));
/* TODO: call fsnotify_dirent() */
fsnotify_nameremove(dentry, 1);
}
/*