Merge tag 'fuse-update-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

Pull fuse updates from Miklos Szeredi:

 - Revert non-waiting FLUSH due to a regression

 - Fix a lookup counter leak in readdirplus

 - Add an option to allow shared mmaps in no-cache mode

 - Add btime support and statx intrastructure to the protocol

 - Invalidate positive/negative dentry on failed create/delete

* tag 'fuse-update-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: conditionally fill kstat in fuse_do_statx()
  fuse: invalidate dentry on EEXIST creates or ENOENT deletes
  fuse: cache btime
  fuse: implement statx
  fuse: add ATTR_TIMEOUT macro
  fuse: add STATX request
  fuse: handle empty request_mask in statx
  fuse: write back dirty pages before direct write in direct_io_relax mode
  fuse: add a new fuse init flag to relax restrictions in no cache mode
  fuse: invalidate page cache pages before direct write
  fuse: nlookup missing decrement in fuse_direntplus_link
  Revert "fuse: in fuse_flush only wait if someone wants the return code"

1 files changed, 29 insertions, 5 deletions

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 549358ffea8b..2e4eb7cf26fb 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -77,7 +77,7 @@ static struct inode *fuse_alloc_inode(struct super_block *sb)
 		return NULL;
 
 	fi->i_time = 0;
-	fi->inval_mask = 0;
+	fi->inval_mask = ~0;
 	fi->nodeid = 0;
 	fi->nlookup = 0;
 	fi->attr_version = 0;
@@ -163,6 +163,7 @@ static ino_t fuse_squash_ino(u64 ino64)
 }
 
 void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr,
+				   struct fuse_statx *sx,
 				   u64 attr_valid, u32 cache_mask)
 {
 	struct fuse_conn *fc = get_fuse_conn(inode);
@@ -172,7 +173,8 @@ void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr,
 
 	fi->attr_version = atomic64_inc_return(&fc->attr_version);
 	fi->i_time = attr_valid;
-	WRITE_ONCE(fi->inval_mask, 0);
+	/* Clear basic stats from invalid mask */
+	set_mask_bits(&fi->inval_mask, STATX_BASIC_STATS, 0);
 
 	inode->i_ino     = fuse_squash_ino(attr->ino);
 	inode->i_mode    = (inode->i_mode & S_IFMT) | (attr->mode & 07777);
@@ -196,6 +198,25 @@ void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr,
 	if (!(cache_mask & STATX_CTIME)) {
 		inode_set_ctime(inode, attr->ctime, attr->ctimensec);
 	}
+	if (sx) {
+		/* Sanitize nsecs */
+		sx->btime.tv_nsec =
+			min_t(u32, sx->btime.tv_nsec, NSEC_PER_SEC - 1);
+
+		/*
+		 * Btime has been queried, cache is valid (whether or not btime
+		 * is available or not) so clear STATX_BTIME from inval_mask.
+		 *
+		 * Availability of the btime attribute is indicated in
+		 * FUSE_I_BTIME
+		 */
+		set_mask_bits(&fi->inval_mask, STATX_BTIME, 0);
+		if (sx->mask & STATX_BTIME) {
+			set_bit(FUSE_I_BTIME, &fi->state);
+			fi->i_btime.tv_sec = sx->btime.tv_sec;
+			fi->i_btime.tv_nsec = sx->btime.tv_nsec;
+		}
+	}
 
 	if (attr->blksize != 0)
 		inode->i_blkbits = ilog2(attr->blksize);
@@ -235,6 +256,7 @@ u32 fuse_get_cache_mask(struct inode *inode)
 }
 
 void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr,
+			    struct fuse_statx *sx,
 			    u64 attr_valid, u64 attr_version)
 {
 	struct fuse_conn *fc = get_fuse_conn(inode);
@@ -269,7 +291,7 @@ void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr,
 	}
 
 	old_mtime = inode->i_mtime;
-	fuse_change_attributes_common(inode, attr, attr_valid, cache_mask);
+	fuse_change_attributes_common(inode, attr, sx, attr_valid, cache_mask);
 
 	oldsize = inode->i_size;
 	/*
@@ -406,7 +428,7 @@ done:
 	spin_lock(&fi->lock);
 	fi->nlookup++;
 	spin_unlock(&fi->lock);
-	fuse_change_attributes(inode, attr, attr_valid, attr_version);
+	fuse_change_attributes(inode, attr, NULL, attr_valid, attr_version);
 
 	return inode;
 }
@@ -1210,6 +1232,8 @@ static void process_init_reply(struct fuse_mount *fm, struct fuse_args *args,
 				fc->init_security = 1;
 			if (flags & FUSE_CREATE_SUPP_GROUP)
 				fc->create_supp_group = 1;
+			if (flags & FUSE_DIRECT_IO_RELAX)
+				fc->direct_io_relax = 1;
 		} else {
 			ra_pages = fc->max_read / PAGE_SIZE;
 			fc->no_lock = 1;
@@ -1256,7 +1280,7 @@ void fuse_send_init(struct fuse_mount *fm)
 		FUSE_NO_OPENDIR_SUPPORT | FUSE_EXPLICIT_INVAL_DATA |
 		FUSE_HANDLE_KILLPRIV_V2 | FUSE_SETXATTR_EXT | FUSE_INIT_EXT |
 		FUSE_SECURITY_CTX | FUSE_CREATE_SUPP_GROUP |
-		FUSE_HAS_EXPIRE_ONLY;
+		FUSE_HAS_EXPIRE_ONLY | FUSE_DIRECT_IO_RELAX;
 #ifdef CONFIG_FUSE_DAX
 	if (fm->fc->dax)
 		flags |= FUSE_MAP_ALIGNMENT;