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fuse: allow umask processing in userspace

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This patch lets filesystems handle masking the file mode on creation.
This is needed if filesystem is using ACLs.

 - The CREATE, MKDIR and MKNOD requests are extended with a "umask"
   parameter.

 - A new FUSE_DONT_MASK flag is added to the INIT request/reply.  With
   this the filesystem may request that the create mode is not masked.

CC: Jean-Pierre André <jean-pierre.andre@wanadoo.fr>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Miklos Szeredi
2009-06-30 20:12:23 +02:00
parent 201fa69a28
commit e0a43ddcc0
4 changed files with 46 additions and 6 deletions
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20
include/linux/fuse.h
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@@ -25,6 +25,9 @@
* - add IOCTL message
* - add unsolicited notification support
* - add POLL message and NOTIFY_POLL notification
*
* 7.12
* - add umask flag to input argument of open, mknod and mkdir
*/
#ifndef _LINUX_FUSE_H
@@ -36,7 +39,7 @@
#define FUSE_KERNEL_VERSION 7
/** Minor version number of this interface */
#define FUSE_KERNEL_MINOR_VERSION 11
#define FUSE_KERNEL_MINOR_VERSION 12
/** The node ID of the root inode */
#define FUSE_ROOT_ID 1
@@ -112,6 +115,7 @@ struct fuse_file_lock {
* INIT request/reply flags
*
* FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
* FUSE_DONT_MASK: don't apply umask to file mode on create operations
*/
#define FUSE_ASYNC_READ (1 << 0)
#define FUSE_POSIX_LOCKS (1 << 1)
@@ -119,6 +123,7 @@ struct fuse_file_lock {
#define FUSE_ATOMIC_O_TRUNC (1 << 3)
#define FUSE_EXPORT_SUPPORT (1 << 4)
#define FUSE_BIG_WRITES (1 << 5)
#define FUSE_DONT_MASK (1 << 6)
/**
* CUSE INIT request/reply flags
@@ -262,14 +267,18 @@ struct fuse_attr_out {
struct fuse_attr attr;
};
#define FUSE_COMPAT_MKNOD_IN_SIZE 8
struct fuse_mknod_in {
__u32 mode;
__u32 rdev;
__u32 umask;
__u32 padding;
};
struct fuse_mkdir_in {
__u32 mode;
__u32 padding;
__u32 umask;
};
struct fuse_rename_in {
@@ -300,8 +309,15 @@ struct fuse_setattr_in {
};
struct fuse_open_in {
__u32 flags;
__u32 unused;
};
struct fuse_create_in {
__u32 flags;
__u32 mode;
__u32 umask;
__u32 padding;
};
struct fuse_open_out {