[patch 12/12] fuse: add blksize field to fuse_attr

Miklos Szeredi
2007-10-02T15:56:26Z

[-- Attachment #1: fuse_add_blksize_to_attributes.patch --]
[-- Type: text/plain, Size: 5517 bytes --]

From: Miklos Szeredi <mszeredi@suse.cz>

Allow the userspace filesystem to supply a blksize value to be
returned by stat() and friends. If the field is zero, it defaults to
the old PAGE_CACHE_SIZE value.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
---

Index: linux/include/linux/fuse.h
===================================================================
--- linux.orig/include/linux/fuse.h 2007-09-27 00:42:19.000000000 +0200
+++ linux/include/linux/fuse.h 2007-09-27 01:00:03.000000000 +0200
@@ -15,6 +15,7 @@
* - new fuse_getattr_in input argument of GETATTR
* - add lk_flags in fuse_lk_in
* - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
+ * - add blksize field to fuse_attr
*/

#include <asm/types.h>
@@ -53,6 +54,8 @@ struct fuse_attr {
__u32 uid;
__u32 gid;
__u32 rdev;
+ __u32 blksize;
+ __u32 padding;
};

struct fuse_kstatfs {
@@ -177,6 +180,8 @@ enum fuse_opcode {
/* The read buffer is required to be at least 8k, but may be much larger */
#define FUSE_MIN_READ_BUFFER 8192

+#define FUSE_COMPAT_ENTRY_OUT_SIZE 120
+
struct fuse_entry_out {
__u64 nodeid; /* Inode ID */
__u64 generation; /* Inode generation: nodeid:gen must
@@ -198,6 +203,8 @@ struct fuse_getattr_in {
__u64 fh;
};

+#define FUSE_COMPAT_ATTR_OUT_SIZE 96
+
struct fuse_attr_out {
__u64 attr_valid; /* Cache timeout for the attributes */
__u32 attr_valid_nsec;
Index: linux/fs/fuse/dir.c
===================================================================
--- linux.orig/fs/fuse/dir.c 2007-09-27 00:42:19.000000000 +0200
+++ linux/fs/fuse/dir.c 2007-09-27 01:00:30.000000000 +0200
@@ -116,13 +116,19 @@ static void fuse_lookup_init(struct fuse
struct dentry *entry,
struct fuse_entry_out *outarg)
{
+ struct fuse_conn *fc = get_fuse_conn(dir);
+
+ memset(outarg, 0, sizeof(struct fuse_entry_out));
req->in.h.opcode = FUSE_LOOKUP;
req->in.h.nodeid = get_node_id(dir);
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
req->out.numargs = 1;
- req->out.args[0].size = sizeof(struct fuse_entry_out);
+ if (fc->minor < 9)
+ req->out.args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE;
+ else
+ req->out.args[0].size = sizeof(struct fuse_entry_out);
req->out.args[0].value = outarg;
}

@@ -356,6 +362,7 @@ static int fuse_create_open(struct inode

flags &= ~O_NOCTTY;
memset(&inarg, 0, sizeof(inarg));
+ memset(&outentry, 0, sizeof(outentry));
inarg.flags = flags;
inarg.mode = mode;
req->in.h.opcode = FUSE_CREATE;
@@ -366,7 +373,10 @@ static int fuse_create_open(struct inode
req->in.args[1].size = entry->d_name.len + 1;
req->in.args[1].value = entry->d_name.name;
req->out.numargs = 2;
- req->out.args[0].size = sizeof(outentry);
+ if (fc->minor < 9)
+ req->out.args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE;
+ else
+ req->out.args[0].size = sizeof(outentry);
req->out.args[0].value = &outentry;
req->out.args[1].size = sizeof(outopen);
req->out.args[1].value = &outopen;
@@ -431,9 +441,13 @@ static int create_new_entry(struct fuse_
return PTR_ERR(forget_req);
}

+ memset(&outarg, 0, sizeof(outarg));
req->in.h.nodeid = get_node_id(dir);
req->out.numargs = 1;
- req->out.args[0].size = sizeof(outarg);
+ if (fc->minor < 9)
+ req->out.args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE;
+ else
+ req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
err = req->out.h.error;
@@ -724,6 +738,7 @@ static int fuse_do_getattr(struct inode
spin_unlock(&fc->lock);

memset(&inarg, 0, sizeof(inarg));
+ memset(&outarg, 0, sizeof(outarg));
/* Directories have separate file-handle space */
if (file && S_ISREG(inode->i_mode)) {
struct fuse_file *ff = file->private_data;
@@ -737,7 +752,10 @@ static int fuse_do_getattr(struct inode
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->out.numargs = 1;
- req->out.args[0].size = sizeof(outarg);
+ if (fc->minor < 9)
+ req->out.args[0].size = FUSE_COMPAT_ATTR_OUT_SIZE;
+ else
+ req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
err = req->out.h.error;
@@ -1102,6 +1120,7 @@ static int fuse_do_setattr(struct dentry
return PTR_ERR(req);

memset(&inarg, 0, sizeof(inarg));
+ memset(&outarg, 0, sizeof(outarg));
iattr_to_fattr(attr, &inarg);
if (file) {
struct fuse_file *ff = file->private_data;
@@ -1119,7 +1138,10 @@ static int fuse_do_setattr(struct dentry
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->out.numargs = 1;
- req->out.args[0].size = sizeof(outarg);
+ if (fc->minor < 9)
+ req->out.args[0].size = FUSE_COMPAT_ATTR_OUT_SIZE;
+ else
+ req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
err = req->out.h.error;
Index: linux/fs/fuse/inode.c
===================================================================
--- linux.orig/fs/fuse/inode.c 2007-09-27 00:42:19.000000000 +0200
+++ linux/fs/fuse/inode.c 2007-09-27 00:42:19.000000000 +0200
@@ -148,6 +148,11 @@ void fuse_change_attributes(struct inode
inode->i_ctime.tv_sec = attr->ctime;
inode->i_ctime.tv_nsec = attr->ctimensec;

+ if (attr->blksize != 0)
+ inode->i_blkbits = ilog2(attr->blksize);
+ else
+ inode->i_blkbits = inode->i_sb->s_blocksize_bits;
+
/*
* Don't set the sticky bit in i_mode, unless we want the VFS
* to check permissions. This prevents failures due to the

--