[PATCH] FUSE - mount options
This patch adds miscellaneous mount options to the FUSE filesystem.
The following mount options are added:
o default_permissions: check permissions with generic_permission()
o allow_other: allow other users to access files
o allow_root: allow root to access files
o kernel_cache: don't invalidate page cache on open
Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index b4aa8f7..c8e6c87 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -21,6 +21,19 @@
/** If more requests are outstanding, then the operation will block */
#define FUSE_MAX_OUTSTANDING 10
+/** If the FUSE_DEFAULT_PERMISSIONS flag is given, the filesystem
+ module will check permissions based on the file mode. Otherwise no
+ permission checking is done in the kernel */
+#define FUSE_DEFAULT_PERMISSIONS (1 << 0)
+
+/** If the FUSE_ALLOW_OTHER flag is given, then not only the user
+ doing the mount will be allowed to access the filesystem */
+#define FUSE_ALLOW_OTHER (1 << 1)
+
+/** If the FUSE_KERNEL_CACHE flag is given, then cached data will not
+ be flushed on open */
+#define FUSE_KERNEL_CACHE (1 << 2)
+
/** FUSE inode */
struct fuse_inode {
/** Inode data */
@@ -109,6 +122,9 @@
lists in fuse_conn */
struct list_head list;
+ /** Entry on the background list */
+ struct list_head bg_entry;
+
/** refcount */
atomic_t count;
@@ -176,15 +192,15 @@
* unmounted.
*/
struct fuse_conn {
- /** The superblock of the mounted filesystem */
- struct super_block *sb;
-
- /** The opened client device */
- struct file *file;
+ /** Reference count */
+ int count;
/** The user id for this mount */
uid_t user_id;
+ /** The fuse mount flags for this mount */
+ unsigned flags;
+
/** Readers of the connection are waiting on this */
wait_queue_head_t waitq;
@@ -194,6 +210,10 @@
/** The list of requests being processed */
struct list_head processing;
+ /** Requests put in the background (RELEASE or any other
+ interrupted request) */
+ struct list_head background;
+
/** Controls the maximum number of outstanding requests */
struct semaphore outstanding_sem;
@@ -201,12 +221,21 @@
outstanding_sem would go negative */
unsigned outstanding_debt;
+ /** RW semaphore for exclusion with fuse_put_super() */
+ struct rw_semaphore sbput_sem;
+
/** The list of unused requests */
struct list_head unused_list;
/** The next unique request id */
u64 reqctr;
+ /** Mount is active */
+ unsigned mounted : 1;
+
+ /** Connection established */
+ unsigned connected : 1;
+
/** Connection failed (version mismatch) */
unsigned conn_error : 1;
@@ -261,6 +290,7 @@
* - the private_data field of the device file
* - the s_fs_info field of the super block
* - unused_list, pending, processing lists in fuse_conn
+ * - background list in fuse_conn
* - the unique request ID counter reqctr in fuse_conn
* - the sb (super_block) field in fuse_conn
* - the file (device file) field in fuse_conn
@@ -372,6 +402,11 @@
void request_send_background(struct fuse_conn *fc, struct fuse_req *req);
/**
+ * Release inodes and file assiciated with background request
+ */
+void fuse_release_background(struct fuse_req *req);
+
+/**
* Get the attributes of a file
*/
int fuse_do_getattr(struct inode *inode);