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From: Vivek Goyal <vgoyal@redhat.com>
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-nvdimm@lists.01.org, virtio-fs@redhat.com,
	miklos@szeredi.hu
Cc: stefanha@redhat.com, dgilbert@redhat.com, mst@redhat.com
Subject: [PATCH 07/20] fuse: Get rid of no_mount_options
Date: Wed,  4 Mar 2020 11:58:32 -0500	[thread overview]
Message-ID: <20200304165845.3081-8-vgoyal@redhat.com> (raw)
In-Reply-To: <20200304165845.3081-1-vgoyal@redhat.com>

This option was introduced so that for virtio_fs we don't show any mounts
options fuse_show_options(). Because we don't offer any of these options
to be controlled by mounter.

Very soon we are planning to introduce option "dax" which mounter should
be able to specify. And no_mount_options does not work anymore. What
we need is a per mount option specific flag so that fileystem can
specify which options to show.

Add few such flags to control the behavior in more fine grained manner
and get rid of no_mount_options.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
---
 fs/fuse/fuse_i.h    | 14 ++++++++++----
 fs/fuse/inode.c     | 22 ++++++++++++++--------
 fs/fuse/virtio_fs.c |  1 -
 3 files changed, 24 insertions(+), 13 deletions(-)

diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index aa75e2305b75..2cebdf6dcfd8 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -468,18 +468,21 @@ struct fuse_fs_context {
 	int fd;
 	unsigned int rootmode;
 	kuid_t user_id;
+	bool user_id_show;
 	kgid_t group_id;
+	bool group_id_show;
 	bool is_bdev:1;
 	bool fd_present:1;
 	bool rootmode_present:1;
 	bool user_id_present:1;
 	bool group_id_present:1;
 	bool default_permissions:1;
+	bool default_permissions_show:1;
 	bool allow_other:1;
+	bool allow_other_show:1;
 	bool destroy:1;
 	bool no_control:1;
 	bool no_force_umount:1;
-	bool no_mount_options:1;
 	unsigned int max_read;
 	unsigned int blksize;
 	const char *subtype;
@@ -509,9 +512,11 @@ struct fuse_conn {
 
 	/** The user id for this mount */
 	kuid_t user_id;
+	bool user_id_show:1;
 
 	/** The group id for this mount */
 	kgid_t group_id;
+	bool group_id_show:1;
 
 	/** The pid namespace for this mount */
 	struct pid_namespace *pid_ns;
@@ -695,10 +700,14 @@ struct fuse_conn {
 
 	/** Check permissions based on the file mode or not? */
 	unsigned default_permissions:1;
+	bool default_permissions_show:1;
 
 	/** Allow other than the mounter user to access the filesystem ? */
 	unsigned allow_other:1;
 
+	/** Show allow_other in mount options */
+	bool allow_other_show:1;
+
 	/** Does the filesystem support copy_file_range? */
 	unsigned no_copy_file_range:1;
 
@@ -714,9 +723,6 @@ struct fuse_conn {
 	/** Do not allow MNT_FORCE umount */
 	unsigned int no_force_umount:1;
 
-	/* Do not show mount options */
-	unsigned int no_mount_options:1;
-
 	/** The number of requests waiting for completion */
 	atomic_t num_waiting;
 
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 95d712d44ca1..f160a3d47b63 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -515,10 +515,12 @@ static int fuse_parse_param(struct fs_context *fc, struct fs_parameter *param)
 
 	case OPT_DEFAULT_PERMISSIONS:
 		ctx->default_permissions = true;
+		ctx->default_permissions_show = true;
 		break;
 
 	case OPT_ALLOW_OTHER:
 		ctx->allow_other = true;
+		ctx->allow_other_show = true;
 		break;
 
 	case OPT_MAX_READ:
@@ -553,14 +555,15 @@ static int fuse_show_options(struct seq_file *m, struct dentry *root)
 	struct super_block *sb = root->d_sb;
 	struct fuse_conn *fc = get_fuse_conn_super(sb);
 
-	if (fc->no_mount_options)
-		return 0;
-
-	seq_printf(m, ",user_id=%u", from_kuid_munged(fc->user_ns, fc->user_id));
-	seq_printf(m, ",group_id=%u", from_kgid_munged(fc->user_ns, fc->group_id));
-	if (fc->default_permissions)
+	if (fc->user_id_show)
+		seq_printf(m, ",user_id=%u",
+			   from_kuid_munged(fc->user_ns, fc->user_id));
+	if (fc->group_id_show)
+		seq_printf(m, ",group_id=%u",
+			   from_kgid_munged(fc->user_ns, fc->group_id));
+	if (fc->default_permissions && fc->default_permissions_show)
 		seq_puts(m, ",default_permissions");
-	if (fc->allow_other)
+	if (fc->allow_other && fc->allow_other_show)
 		seq_puts(m, ",allow_other");
 	if (fc->max_read != ~0)
 		seq_printf(m, ",max_read=%u", fc->max_read);
@@ -1171,14 +1174,17 @@ int fuse_fill_super_common(struct super_block *sb, struct fuse_fs_context *ctx)
 	sb->s_flags |= SB_POSIXACL;
 
 	fc->default_permissions = ctx->default_permissions;
+	fc->default_permissions_show = ctx->default_permissions_show;
 	fc->allow_other = ctx->allow_other;
+	fc->allow_other_show = ctx->allow_other_show;
 	fc->user_id = ctx->user_id;
+	fc->user_id_show = ctx->user_id_show;
 	fc->group_id = ctx->group_id;
+	fc->group_id_show = ctx->group_id_show;
 	fc->max_read = max_t(unsigned, 4096, ctx->max_read);
 	fc->destroy = ctx->destroy;
 	fc->no_control = ctx->no_control;
 	fc->no_force_umount = ctx->no_force_umount;
-	fc->no_mount_options = ctx->no_mount_options;
 
 	err = -ENOMEM;
 	root = fuse_get_root_inode(sb, ctx->rootmode);
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index a16cc9195087..3f786a15b0d9 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -1060,7 +1060,6 @@ static int virtio_fs_fill_super(struct super_block *sb)
 		.destroy = true,
 		.no_control = true,
 		.no_force_umount = true,
-		.no_mount_options = true,
 	};
 
 	mutex_lock(&virtio_fs_mutex);
-- 
2.20.1
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  parent reply	other threads:[~2020-03-04 16:59 UTC|newest]

Thread overview: 67+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-04 16:58 [PATCH 00/20] virtiofs: Add DAX support Vivek Goyal
2020-03-04 16:58 ` [PATCH 01/20] dax: Modify bdev_dax_pgoff() to handle NULL bdev Vivek Goyal
2020-03-04 16:58 ` [PATCH 02/20] dax: Create a range version of dax_layout_busy_page() Vivek Goyal
2020-03-10 15:19   ` Ira Weiny
2020-03-10 20:29     ` Vivek Goyal
2020-03-04 16:58 ` [PATCH 03/20] virtio: Add get_shm_region method Vivek Goyal
2020-03-10 10:53   ` Stefan Hajnoczi
2020-03-04 16:58 ` [PATCH 04/20] virtio: Implement get_shm_region for PCI transport Vivek Goyal
2020-03-10 11:04   ` Stefan Hajnoczi
2020-03-10 18:19     ` Vivek Goyal
2020-03-11 17:34       ` Stefan Hajnoczi
2020-03-11 19:29         ` Vivek Goyal
2020-03-10 11:12   ` Michael S. Tsirkin
2020-03-10 18:47     ` Vivek Goyal
2020-03-10 21:27       ` Michael S. Tsirkin
2020-03-04 16:58 ` [PATCH 05/20] virtio: Implement get_shm_region for MMIO transport Vivek Goyal
2020-03-10 11:06   ` Stefan Hajnoczi
2020-03-04 16:58 ` [PATCH 06/20] virtiofs: Provide a helper function for virtqueue initialization Vivek Goyal
2020-03-10 14:10   ` Miklos Szeredi
2020-03-04 16:58 ` Vivek Goyal [this message]
2020-03-10 14:12   ` [PATCH 07/20] fuse: Get rid of no_mount_options Miklos Szeredi
2020-03-04 16:58 ` [PATCH 08/20] fuse,virtiofs: Add a mount option to enable dax Vivek Goyal
2020-03-10 14:16   ` Miklos Szeredi
2020-03-04 16:58 ` [PATCH 09/20] virtio_fs, dax: Set up virtio_fs dax_device Vivek Goyal
2020-03-04 16:58 ` [PATCH 10/20] fuse,virtiofs: Keep a list of free dax memory ranges Vivek Goyal
2020-03-10 19:29   ` Miklos Szeredi
2020-03-04 16:58 ` [PATCH 11/20] fuse: implement FUSE_INIT map_alignment field Vivek Goyal
2020-03-10 19:31   ` Miklos Szeredi
2020-03-04 16:58 ` [PATCH 12/20] fuse: Introduce setupmapping/removemapping commands Vivek Goyal
2020-03-10 19:49   ` Miklos Szeredi
2020-03-10 20:33     ` Vivek Goyal
2020-03-11  7:03       ` Amir Goldstein
2020-03-11 14:19         ` Miklos Szeredi
2020-03-11 14:41           ` Vivek Goyal
2020-03-11 15:12             ` Miklos Szeredi
2020-03-04 16:58 ` [PATCH 13/20] fuse, dax: Implement dax read/write operations Vivek Goyal
2020-03-12  9:43   ` Miklos Szeredi
2020-03-12 16:02     ` Vivek Goyal
2020-03-13 10:18       ` Miklos Szeredi
2020-03-13 13:41         ` Vivek Goyal
2020-04-04  0:25   ` Liu Bo
2020-04-14 12:54     ` Vivek Goyal
2020-03-04 16:58 ` [PATCH 14/20] fuse,dax: add DAX mmap support Vivek Goyal
2020-03-04 16:58 ` [PATCH 15/20] fuse, dax: Take ->i_mmap_sem lock during dax page fault Vivek Goyal
2020-03-04 16:58 ` [PATCH 16/20] fuse,virtiofs: Define dax address space operations Vivek Goyal
2020-03-04 16:58 ` [PATCH 17/20] fuse,virtiofs: Maintain a list of busy elements Vivek Goyal
2020-03-04 16:58 ` [PATCH 18/20] fuse: Release file in process context Vivek Goyal
2020-03-04 16:58 ` [PATCH 19/20] fuse: Take inode lock for dax inode truncation Vivek Goyal
2020-03-04 16:58 ` [PATCH 20/20] fuse,virtiofs: Add logic to free up a memory range Vivek Goyal
2020-03-11  5:16   ` Liu Bo
2020-03-11 12:59     ` Vivek Goyal
2020-03-11 17:24       ` Liu Bo
2020-03-26  0:09   ` Liu Bo
2020-03-27 14:01     ` Vivek Goyal
2020-03-27 22:06       ` Liu Bo
2020-04-14 19:30         ` Vivek Goyal
2020-04-15 17:22           ` Liu Bo
2020-04-16 19:05             ` Vivek Goyal
2020-04-17 18:05               ` Liu Bo
2020-03-11  5:22 ` [PATCH 00/20] virtiofs: Add DAX support Amir Goldstein
2020-03-11 13:09   ` Vivek Goyal
2020-03-11 18:48   ` Vivek Goyal
2020-03-11 19:32     ` Amir Goldstein
2020-03-11 19:39       ` Vivek Goyal
2020-03-11 13:38 ` Patrick Ohly
2020-03-16 13:02   ` Vivek Goyal
2020-03-17  8:28     ` Patrick Ohly

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