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authorMiklos Szeredi <miklos@szeredi.hu>2005-11-07 00:59:52 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 07:53:42 -0800
commitbefc649c2274a1c35f0cd1e888dd83652cbb0422 (patch)
treeccbbc9f286c50dd8c9f036408b71acda9f5dd427 /fs
parentfd72faac95d7e47610e981d7ed7b3c1529e55c88 (diff)
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[PATCH] FUSE: pass file handle in setattr
This patch passes the file handle supplied in iattr to userspace, in case the ->setattr() was invoked from sys_ftruncate(). This solves the permission checking (or lack thereof) in ftruncate() for the class of filesystems served by an unprivileged userspace process. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/fuse/dir.c28
1 files changed, 14 insertions, 14 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 83be119ef067..c045cc70c749 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -763,29 +763,29 @@ static int fuse_dir_fsync(struct file *file, struct dentry *de, int datasync)
return file ? fuse_fsync_common(file, de, datasync, 1) : 0;
}
-static unsigned iattr_to_fattr(struct iattr *iattr, struct fuse_attr *fattr)
+static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg)
{
unsigned ivalid = iattr->ia_valid;
- unsigned fvalid = 0;
-
- memset(fattr, 0, sizeof(*fattr));
if (ivalid & ATTR_MODE)
- fvalid |= FATTR_MODE, fattr->mode = iattr->ia_mode;
+ arg->valid |= FATTR_MODE, arg->mode = iattr->ia_mode;
if (ivalid & ATTR_UID)
- fvalid |= FATTR_UID, fattr->uid = iattr->ia_uid;
+ arg->valid |= FATTR_UID, arg->uid = iattr->ia_uid;
if (ivalid & ATTR_GID)
- fvalid |= FATTR_GID, fattr->gid = iattr->ia_gid;
+ arg->valid |= FATTR_GID, arg->gid = iattr->ia_gid;
if (ivalid & ATTR_SIZE)
- fvalid |= FATTR_SIZE, fattr->size = iattr->ia_size;
+ arg->valid |= FATTR_SIZE, arg->size = iattr->ia_size;
/* You can only _set_ these together (they may change by themselves) */
if ((ivalid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) {
- fvalid |= FATTR_ATIME | FATTR_MTIME;
- fattr->atime = iattr->ia_atime.tv_sec;
- fattr->mtime = iattr->ia_mtime.tv_sec;
+ arg->valid |= FATTR_ATIME | FATTR_MTIME;
+ arg->atime = iattr->ia_atime.tv_sec;
+ arg->mtime = iattr->ia_mtime.tv_sec;
+ }
+ if (ivalid & ATTR_FILE) {
+ struct fuse_file *ff = iattr->ia_file->private_data;
+ arg->valid |= FATTR_FH;
+ arg->fh = ff->fh;
}
-
- return fvalid;
}
static int fuse_setattr(struct dentry *entry, struct iattr *attr)
@@ -820,7 +820,7 @@ static int fuse_setattr(struct dentry *entry, struct iattr *attr)
return -EINTR;
memset(&inarg, 0, sizeof(inarg));
- inarg.valid = iattr_to_fattr(attr, &inarg.attr);
+ iattr_to_fattr(attr, &inarg);
req->in.h.opcode = FUSE_SETATTR;
req->in.h.nodeid = get_node_id(inode);
req->inode = inode;