From 1e9a4ed9396e9c31139721b639550ffb1df17065 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Fri, 9 Sep 2005 13:10:31 -0700 Subject: [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/fuse/fuse_i.h | 45 ++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 40 insertions(+), 5 deletions(-) (limited to 'fs/fuse/fuse_i.h') diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index b4aa8f7bc2c..c8e6c87496e 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 @@ struct fuse_req { 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 @@ struct fuse_req { * 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 @@ struct fuse_conn { /** 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 @@ struct fuse_conn { 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 @@ extern struct file_operations fuse_dev_operations; * - 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 @@ -371,6 +401,11 @@ void request_send_noreply(struct fuse_conn *fc, struct fuse_req *req); */ 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 */ -- cgit v1.2.3