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| author | Seth Forshee | 2016-08-29 15:46:37 +0200 |
|---|---|---|
| committer | Miklos Szeredi | 2016-10-01 07:32:32 +0200 |
| commit | 60bcc88ad185d512f5718f2f8dcccb483ea8fb73 (patch) | |
| tree | 898d528618e9091ed7a9191ee736b57073b8a1ad /fs/fuse/inode.c | |
| parent | fuse: handle killpriv in userspace fs (diff) | |
| download | kernel-qcow2-linux-60bcc88ad185d512f5718f2f8dcccb483ea8fb73.tar.gz kernel-qcow2-linux-60bcc88ad185d512f5718f2f8dcccb483ea8fb73.tar.xz kernel-qcow2-linux-60bcc88ad185d512f5718f2f8dcccb483ea8fb73.zip | |
fuse: Add posix ACL support
Add a new INIT flag, FUSE_POSIX_ACL, for negotiating ACL support with
userspace. When it is set in the INIT response, ACL support will be
enabled. ACL support also implies "default_permissions".
When ACL support is enabled, the kernel will cache and have responsibility
for enforcing ACLs. ACL xattrs will be passed to userspace, which is
responsible for updating the ACLs in the filesystem, keeping the file mode
in sync, and inheritance of default ACLs when new filesystem nodes are
created.
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/fuse/inode.c')
| -rw-r--r-- | fs/fuse/inode.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index b965934939cb..16ac9d86c507 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -20,6 +20,7 @@ #include <linux/random.h> #include <linux/sched.h> #include <linux/exportfs.h> +#include <linux/posix_acl.h> MODULE_AUTHOR("Miklos Szeredi <miklos@szeredi.hu>"); MODULE_DESCRIPTION("Filesystem in Userspace"); @@ -340,6 +341,7 @@ int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid, return -ENOENT; fuse_invalidate_attr(inode); + forget_all_cached_acls(inode); if (offset >= 0) { pg_start = offset >> PAGE_SHIFT; if (len <= 0) @@ -914,6 +916,11 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req) fc->handle_killpriv = 1; if (arg->time_gran && arg->time_gran <= 1000000000) fc->sb->s_time_gran = arg->time_gran; + if ((arg->flags & FUSE_POSIX_ACL)) { + fc->flags |= FUSE_DEFAULT_PERMISSIONS; + fc->posix_acl = 1; + fc->sb->s_xattr = fuse_acl_xattr_handlers; + } } else { ra_pages = fc->max_read / PAGE_SIZE; fc->no_lock = 1; @@ -943,7 +950,7 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req) FUSE_FLOCK_LOCKS | FUSE_HAS_IOCTL_DIR | FUSE_AUTO_INVAL_DATA | FUSE_DO_READDIRPLUS | FUSE_READDIRPLUS_AUTO | FUSE_ASYNC_DIO | FUSE_WRITEBACK_CACHE | FUSE_NO_OPEN_SUPPORT | - FUSE_PARALLEL_DIROPS | FUSE_HANDLE_KILLPRIV; + FUSE_PARALLEL_DIROPS | FUSE_HANDLE_KILLPRIV | FUSE_POSIX_ACL; req->in.h.opcode = FUSE_INIT; req->in.numargs = 1; req->in.args[0].size = sizeof(*arg); |