From: Miklos Szeredi <miklos@szeredi.hu>
Date: Thu, 2 Jul 2009 12:26:36 +0000 (+0000)
Subject: * The context is extended with a 'umask' field.  The umask is sent
X-Git-Tag: fuse_2_8_0~5
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=24b35c3d97ffdbf0a1f8e8b4e94ed892343603a6;p=qemu-gpiodev%2Flibfuse.git

* The context is extended with a 'umask' field.  The umask is sent
for mknod, mkdir and create requests by linux kernel version
2.6.31 or later, otherwise the umask is set to zero.  Also
introduce a new feature flag: FUSE_CAP_DONT_MASK.  If the kernel
supports this feature, then this flag will be set in conn->capable
in the ->init() method.  If the filesystem sets this flag in in
conn->want, then the create modes will not be masked.

* Add low level interfaces for lookup cache and attribute
invalidation.  This feature is available in linux kernels 2.6.31
or later.  Patch by John Muir

* Kernel interface version is now 7.12
---

diff --git a/ChangeLog b/ChangeLog
index 313a049..bfb83c4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+2009-07-02  Miklos Szeredi <miklos@szeredi.hu>
+
+	* The context is extended with a 'umask' field.  The umask is sent
+	for mknod, mkdir and create requests by linux kernel version
+	2.6.31 or later, otherwise the umask is set to zero.  Also
+	introduce a new feature flag: FUSE_CAP_DONT_MASK.  If the kernel
+	supports this feature, then this flag will be set in conn->capable
+	in the ->init() method.  If the filesystem sets this flag in in
+	conn->want, then the create modes will not be masked.
+
+	* Add low level interfaces for lookup cache and attribute
+	invalidation.  This feature is available in linux kernels 2.6.31
+	or later.  Patch by John Muir
+
+	* Kernel interface version is now 7.12
+
 2009-06-19  Miklos Szeredi <miklos@szeredi.hu>
 
 	* Add fuse_getgroups (high level lib) and fuse_req_getgroups (low
diff --git a/include/fuse.h b/include/fuse.h
index a58cd9f..7429922 100644
--- a/include/fuse.h
+++ b/include/fuse.h
@@ -518,6 +518,9 @@ struct fuse_context {
 
 	/** Private filesystem data */
 	void *private_data;
+
+	/** Umask of the calling process (introduced in version 2.8) */
+	mode_t umask;
 };
 
 /**
diff --git a/include/fuse_common.h b/include/fuse_common.h
index ba341b3..291d1b7 100644
--- a/include/fuse_common.h
+++ b/include/fuse_common.h
@@ -88,12 +88,14 @@ struct fuse_file_info {
  * FUSE_CAP_ATOMIC_O_TRUNC: filesystem handles the O_TRUNC open flag
  * FUSE_CAP_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
  * FUSE_CAP_BIG_WRITES: filesystem can handle write size larger than 4kB
+ * FUSE_CAP_DONT_MASK: don't apply umask to file mode on create operations
  */
 #define FUSE_CAP_ASYNC_READ	(1 << 0)
 #define FUSE_CAP_POSIX_LOCKS	(1 << 1)
 #define FUSE_CAP_ATOMIC_O_TRUNC	(1 << 3)
 #define FUSE_CAP_EXPORT_SUPPORT	(1 << 4)
 #define FUSE_CAP_BIG_WRITES	(1 << 5)
+#define FUSE_CAP_DONT_MASK	(1 << 6)
 
 /**
  * Ioctl flags
diff --git a/include/fuse_kernel.h b/include/fuse_kernel.h
index 541364f..dac35d8 100644
--- a/include/fuse_kernel.h
+++ b/include/fuse_kernel.h
@@ -51,6 +51,11 @@
  *  - 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
+ *  - add notification messages for invalidation of inodes and
+ *    directory entries
  */
 
 #ifndef _LINUX_FUSE_H
@@ -58,6 +63,7 @@
 
 #include <sys/types.h>
 #define __u64 uint64_t
+#define __s64 int64_t
 #define __u32 uint32_t
 #define __s32 int32_t
 
@@ -65,7 +71,7 @@
 #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
@@ -141,6 +147,7 @@ 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)
@@ -148,6 +155,7 @@ 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
@@ -253,6 +261,8 @@ enum fuse_opcode {
 
 enum fuse_notify_code {
 	FUSE_NOTIFY_POLL   = 1,
+	FUSE_NOTIFY_INVAL_INODE = 2,
+	FUSE_NOTIFY_INVAL_ENTRY = 3,
 	FUSE_NOTIFY_CODE_MAX,
 };
 
@@ -291,14 +301,18 @@ 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 {
@@ -329,8 +343,15 @@ 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 {
@@ -537,4 +558,16 @@ struct fuse_dirent {
 #define FUSE_DIRENT_SIZE(d) \
 	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
 
+struct fuse_notify_inval_inode_out {
+	__u64	ino;
+	__s64	off;
+	__s64	len;
+};
+
+struct fuse_notify_inval_entry_out {
+	__u64	parent;
+	__u32	namelen;
+	__u32	padding;
+};
+
 #endif /* _LINUX_FUSE_H */
diff --git a/include/fuse_lowlevel.h b/include/fuse_lowlevel.h
index a495e15..8c04cd4 100644
--- a/include/fuse_lowlevel.h
+++ b/include/fuse_lowlevel.h
@@ -109,6 +109,9 @@ struct fuse_ctx {
 
 	/** Thread ID of the calling process */
 	pid_t pid;
+
+	/** Umask of the calling process (introduced in version 2.8) */
+	mode_t umask;
 };
 
 /* 'to_set' flags in setattr */
@@ -1151,6 +1154,32 @@ int fuse_reply_poll(fuse_req_t req, unsigned revents);
  */
 int fuse_lowlevel_notify_poll(struct fuse_pollhandle *ph);
 
+/**
+ * Notify to invalidate cache for an inode
+ *
+ * @param ch the channel through which to send the invalidation
+ * @param ino the inode number
+ * @param off the offset in the inode where to start invalidating
+ *            or negative to invalidate attributes only
+ * @param len the amount of cache to invalidate or 0 for all
+ * @return zero for success, -errno for failure
+ */
+int fuse_lowlevel_notify_inval_inode(struct fuse_chan *ch, fuse_ino_t ino,
+                                     off_t off, off_t len);
+
+/**
+ * Notify to invalidate parent attributes and the dentry matching
+ * parent/name
+ *
+ * @param ch the channel through which to send the invalidation
+ * @param parent inode number
+ * @param name file name
+ * @param namelen strlen() of file name
+ * @return zero for success, -errno for failure
+ */
+int fuse_lowlevel_notify_inval_entry(struct fuse_chan *ch, fuse_ino_t parent,
+                                     const char *name, size_t namelen);
+
 /* ----------------------------------------------------------- *
  * Utility functions					       *
  * ----------------------------------------------------------- */
@@ -1375,6 +1404,14 @@ void fuse_session_reset(struct fuse_session *se);
  */
 int fuse_session_exited(struct fuse_session *se);
 
+/**
+ * Get the user data provided to the session
+ *
+ * @param se the session
+ * @return the user data
+ */
+void *fuse_session_data(struct fuse_session *se);
+
 /**
  * Enter a single threaded event loop
  *
diff --git a/lib/fuse.c b/lib/fuse.c
index dad9a71..68cb603 100644
--- a/lib/fuse.c
+++ b/lib/fuse.c
@@ -1422,8 +1422,10 @@ int fuse_fs_create(struct fuse_fs *fs, const char *path, mode_t mode,
 		int err;
 
 		if (fs->debug)
-			fprintf(stderr, "create flags: 0x%x %s\n", fi->flags,
-				path);
+			fprintf(stderr,
+				"create flags: 0x%x %s 0%o umask=0%03o\n",
+				fi->flags, path, mode,
+				fuse_get_context()->umask);
 
 		err = fs->op.create(path, mode, fi);
 
@@ -1572,8 +1574,9 @@ int fuse_fs_mknod(struct fuse_fs *fs, const char *path, mode_t mode,
 	fuse_get_context()->private_data = fs->user_data;
 	if (fs->op.mknod) {
 		if (fs->debug)
-			fprintf(stderr, "mknod %s 0%o 0x%llx\n", path,
-				mode, (unsigned long long) rdev);
+			fprintf(stderr, "mknod %s 0%o 0x%llx umask=0%03o\n",
+				path, mode, (unsigned long long) rdev,
+				fuse_get_context()->umask);
 
 		return fs->op.mknod(path, mode, rdev);
 	} else {
@@ -1586,7 +1589,8 @@ int fuse_fs_mkdir(struct fuse_fs *fs, const char *path, mode_t mode)
 	fuse_get_context()->private_data = fs->user_data;
 	if (fs->op.mkdir) {
 		if (fs->debug)
-			fprintf(stderr, "mkdir %s 0%o\n", path, mode);
+			fprintf(stderr, "mkdir %s 0%o umask=0%03o\n",
+				path, mode, fuse_get_context()->umask);
 
 		return fs->op.mkdir(path, mode);
 	} else {
@@ -1909,6 +1913,7 @@ static struct fuse *req_fuse_prepare(fuse_req_t req)
 	c->ctx.uid = ctx->uid;
 	c->ctx.gid = ctx->gid;
 	c->ctx.pid = ctx->pid;
+	c->ctx.umask = ctx->umask;
 	return c->ctx.fuse;
 }
 
diff --git a/lib/fuse_lowlevel.c b/lib/fuse_lowlevel.c
index 89e8f2f..32b9db3 100644
--- a/lib/fuse_lowlevel.c
+++ b/lib/fuse_lowlevel.c
@@ -606,9 +606,15 @@ static void do_readlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 static void do_mknod(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
 	struct fuse_mknod_in *arg = (struct fuse_mknod_in *) inarg;
+	char *name = PARAM(arg);
+
+	if (req->f->conn.proto_minor >= 12)
+		req->ctx.umask = arg->umask;
+	else
+		name = (char *) inarg + FUSE_COMPAT_MKNOD_IN_SIZE;
 
 	if (req->f->op.mknod)
-		req->f->op.mknod(req, nodeid, PARAM(arg), arg->mode, arg->rdev);
+		req->f->op.mknod(req, nodeid, name, arg->mode, arg->rdev);
 	else
 		fuse_reply_err(req, ENOSYS);
 }
@@ -617,6 +623,9 @@ static void do_mkdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
 	struct fuse_mkdir_in *arg = (struct fuse_mkdir_in *) inarg;
 
+	if (req->f->conn.proto_minor >= 12)
+		req->ctx.umask = arg->umask;
+
 	if (req->f->op.mkdir)
 		req->f->op.mkdir(req, nodeid, PARAM(arg), arg->mode);
 	else
@@ -678,15 +687,21 @@ static void do_link(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 static void do_create(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_open_in *arg = (struct fuse_open_in *) inarg;
+	struct fuse_create_in *arg = (struct fuse_create_in *) inarg;
 
 	if (req->f->op.create) {
 		struct fuse_file_info fi;
+		char *name = PARAM(arg);
 
 		memset(&fi, 0, sizeof(fi));
 		fi.flags = arg->flags;
 
-		req->f->op.create(req, nodeid, PARAM(arg), arg->mode, &fi);
+		if (req->f->conn.proto_minor >= 12)
+			req->ctx.umask = arg->umask;
+		else
+			name = (char *) inarg + sizeof(struct fuse_open_in);
+
+		req->f->op.create(req, nodeid, name, arg->mode, &fi);
 	} else
 		fuse_reply_err(req, ENOSYS);
 }
@@ -1168,6 +1183,8 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 			f->conn.capable |= FUSE_CAP_EXPORT_SUPPORT;
 		if (arg->flags & FUSE_BIG_WRITES)
 			f->conn.capable |= FUSE_CAP_BIG_WRITES;
+		if (arg->flags & FUSE_DONT_MASK)
+			f->conn.capable |= FUSE_CAP_DONT_MASK;
 	} else {
 		f->conn.async_read = 0;
 		f->conn.max_readahead = 0;
@@ -1207,6 +1224,8 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 		outarg.flags |= FUSE_EXPORT_SUPPORT;
 	if (f->conn.want & FUSE_CAP_BIG_WRITES)
 		outarg.flags |= FUSE_BIG_WRITES;
+	if (f->conn.want & FUSE_CAP_DONT_MASK)
+		outarg.flags |= FUSE_DONT_MASK;
 	outarg.max_readahead = f->conn.max_readahead;
 	outarg.max_write = f->conn.max_write;
 
@@ -1270,6 +1289,56 @@ int fuse_lowlevel_notify_poll(struct fuse_pollhandle *ph)
 	}
 }
 
+int fuse_lowlevel_notify_inval_inode(struct fuse_chan *ch, fuse_ino_t ino,
+                                     off_t off, off_t len)
+{
+	struct fuse_notify_inval_inode_out outarg;
+	struct fuse_ll *f;
+	struct iovec iov[2];
+
+	if (!ch)
+		return -EINVAL;
+
+	f = (struct fuse_ll *)fuse_session_data(fuse_chan_session(ch));
+	if (!f)
+		return -ENODEV;
+
+	outarg.ino = ino;
+	outarg.off = off;
+	outarg.len = len;
+
+	iov[1].iov_base = &outarg;
+	iov[1].iov_len = sizeof(outarg);
+
+	return send_notify_iov(f, ch, FUSE_NOTIFY_INVAL_INODE, iov, 2);
+}
+
+int fuse_lowlevel_notify_inval_entry(struct fuse_chan *ch, fuse_ino_t parent,
+                                     const char *name, size_t namelen)
+{
+	struct fuse_notify_inval_entry_out outarg;
+	struct fuse_ll *f;
+	struct iovec iov[3];
+
+	if (!ch)
+		return -EINVAL;
+
+	f = (struct fuse_ll *)fuse_session_data(fuse_chan_session(ch));
+	if (!f)
+		return -ENODEV;
+
+	outarg.parent = parent;
+	outarg.namelen = namelen;
+	outarg.padding = 0;
+
+	iov[1].iov_base = &outarg;
+	iov[1].iov_len = sizeof(outarg);
+	iov[2].iov_base = (void *)name;
+	iov[2].iov_len = namelen + 1;
+
+	return send_notify_iov(f, ch, FUSE_NOTIFY_INVAL_ENTRY, iov, 3);
+}
+
 void *fuse_req_userdata(fuse_req_t req)
 {
 	return req->f->userdata;
@@ -1280,6 +1349,19 @@ const struct fuse_ctx *fuse_req_ctx(fuse_req_t req)
 	return &req->ctx;
 }
 
+/*
+ * The size of fuse_ctx got extended, so need to be careful about
+ * incompatibility (i.e. a new binary cannot work with an old
+ * library).
+ */
+const struct fuse_ctx *fuse_req_ctx_compat24(fuse_req_t req);
+const struct fuse_ctx *fuse_req_ctx_compat24(fuse_req_t req)
+{
+	return fuse_req_ctx(req);
+}
+FUSE_SYMVER(".symver fuse_req_ctx_compat24,fuse_req_ctx@FUSE_2.4");
+
+
 void fuse_req_interrupt_func(fuse_req_t req, fuse_interrupt_func_t func,
 			     void *data)
 {
diff --git a/lib/fuse_session.c b/lib/fuse_session.c
index 7df4795..3758627 100644
--- a/lib/fuse_session.c
+++ b/lib/fuse_session.c
@@ -111,6 +111,11 @@ int fuse_session_exited(struct fuse_session *se)
 		return se->exited;
 }
 
+void *fuse_session_data(struct fuse_session *se)
+{
+	return se->data;
+}
+
 static struct fuse_chan *fuse_chan_new_common(struct fuse_chan_ops *op, int fd,
 					      size_t bufsize, void *data,
 					      int compat)
diff --git a/lib/fuse_versionscript b/lib/fuse_versionscript
index 463c74f..4ab0291 100644
--- a/lib/fuse_versionscript
+++ b/lib/fuse_versionscript
@@ -3,7 +3,6 @@ FUSE_2.2 {
 		fuse_destroy;
 		fuse_exit;
 		fuse_exited;
-		fuse_get_context;
 		fuse_invalidate;
 		fuse_is_lib_option;
 		fuse_loop;
@@ -43,7 +42,6 @@ FUSE_2.4 {
 		fuse_reply_readlink;
 		fuse_reply_write;
 		fuse_reply_xattr;
-		fuse_req_ctx;
 		fuse_req_userdata;
 		fuse_session_add_chan;
 		fuse_session_destroy;
@@ -176,6 +174,10 @@ FUSE_2.8 {
 		fuse_reply_poll;
 		fuse_req_getgroups;
 		fuse_getgroups;
+		fuse_req_ctx;
+		fuse_get_context;
+		fuse_lowlevel_notify_inval_inode;
+		fuse_lowlevel_notify_inval_entry;
 
 	local:
 		*;