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| author | Miklos Szeredi <mszeredi@redhat.com> | 2022-10-28 14:25:21 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-09-12 11:10:27 +0200 |
| commit | 312e98342f842933c3ea7fe38903677d537dfad6 (patch) | |
| tree | 7fd95b876519f96459353922067efc95ddf945c2 /fs/fuse | |
| parent | 9dc7ad2b67772cfb94ceb3b0c9c4023c2463215d (diff) | |
| download | linux-312e98342f842933c3ea7fe38903677d537dfad6.tar.gz linux-312e98342f842933c3ea7fe38903677d537dfad6.tar.bz2 linux-312e98342f842933c3ea7fe38903677d537dfad6.zip | |
fuse: add "expire only" mode to FUSE_NOTIFY_INVAL_ENTRY
[ Upstream commit 4f8d37020e1fd0bf6ee9381ba918135ef3712efd ]
Add a flag to entry expiration that lets the filesystem expire a dentry
without kicking it out from the cache immediately.
This makes a difference for overmounted dentries, where plain invalidation
would detach all submounts before dropping the dentry from the cache. If
only expiry is set on the dentry, then any overmounts are left alone and
until ->d_revalidate() is called.
Note: ->d_revalidate() is not called for the case of following a submount,
so invalidation will only be triggered for the non-overmounted case. The
dentry could also be mounted in a different mount instance, in which case
any submounts will still be detached.
Suggested-by: Jakob Blomer <jblomer@cern.ch>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Stable-dep-of: 3002240d1649 ("fuse: fix memory leak in fuse_create_open")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/fuse')
| -rw-r--r-- | fs/fuse/dev.c | 4 | ||||
| -rw-r--r-- | fs/fuse/dir.c | 6 | ||||
| -rw-r--r-- | fs/fuse/fuse_i.h | 2 |
3 files changed, 7 insertions, 5 deletions
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index 96a717f73ce3..61bef919c042 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -1498,7 +1498,7 @@ static int fuse_notify_inval_entry(struct fuse_conn *fc, unsigned int size, buf[outarg.namelen] = 0; down_read(&fc->killsb); - err = fuse_reverse_inval_entry(fc, outarg.parent, 0, &name); + err = fuse_reverse_inval_entry(fc, outarg.parent, 0, &name, outarg.flags); up_read(&fc->killsb); kfree(buf); return err; @@ -1546,7 +1546,7 @@ static int fuse_notify_delete(struct fuse_conn *fc, unsigned int size, buf[outarg.namelen] = 0; down_read(&fc->killsb); - err = fuse_reverse_inval_entry(fc, outarg.parent, outarg.child, &name); + err = fuse_reverse_inval_entry(fc, outarg.parent, outarg.child, &name, 0); up_read(&fc->killsb); kfree(buf); return err; diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 936a24b646ce..8474003aa54d 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -1174,7 +1174,7 @@ int fuse_update_attributes(struct inode *inode, struct file *file, u32 mask) } int fuse_reverse_inval_entry(struct fuse_conn *fc, u64 parent_nodeid, - u64 child_nodeid, struct qstr *name) + u64 child_nodeid, struct qstr *name, u32 flags) { int err = -ENOTDIR; struct inode *parent; @@ -1201,7 +1201,9 @@ int fuse_reverse_inval_entry(struct fuse_conn *fc, u64 parent_nodeid, goto unlock; fuse_dir_changed(parent); - fuse_invalidate_entry(entry); + if (!(flags & FUSE_EXPIRE_ONLY)) + d_invalidate(entry); + fuse_invalidate_entry_cache(entry); if (child_nodeid != 0 && d_really_is_positive(entry)) { inode_lock(d_inode(entry)); diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 66c2a9999468..cb464e5b171a 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -1235,7 +1235,7 @@ int fuse_reverse_inval_inode(struct fuse_conn *fc, u64 nodeid, * then the dentry is unhashed (d_delete()). */ int fuse_reverse_inval_entry(struct fuse_conn *fc, u64 parent_nodeid, - u64 child_nodeid, struct qstr *name); + u64 child_nodeid, struct qstr *name, u32 flags); int fuse_do_open(struct fuse_mount *fm, u64 nodeid, struct file *file, bool isdir); |