Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262500AbVAJWh2 (ORCPT ); Mon, 10 Jan 2005 17:37:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262564AbVAJWah (ORCPT ); Mon, 10 Jan 2005 17:30:37 -0500 Received: from brmea-mail-4.Sun.COM ([192.18.98.36]:42997 "EHLO brmea-mail-4.sun.com") by vger.kernel.org with ESMTP id S262725AbVAJWTJ (ORCPT ); Mon, 10 Jan 2005 17:19:09 -0500 Date: Mon, 10 Jan 2005 17:18:39 -0500 From: Mike Waychison Subject: Re: [PATCH 4/11] FUSE - read-only operations In-reply-to: To: Miklos Szeredi Cc: akpm@osdl.org, torvalds@osdl.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Message-id: <41E2FF3F.8070307@sun.com> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 Content-transfer-encoding: 7BIT X-Accept-Language: en-us, en User-Agent: Mozilla Thunderbird 0.9 (X11/20041124) X-Enigmail-Version: 0.89.0.0 X-Enigmail-Supports: pgp-inline, pgp-mime References: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 22554 Lines: 821 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Miklos Szeredi wrote: > This patch adds the read-only filesystem operations of FUSE. > > This contains the following files: > > o dir.c > - directory, symlink and file-inode operations > > The following operations are added: > > o lookup > o getattr > o readlink > o follow_link > o directory open > o readdir > o directory release > o permission > o dentry revalidate > o statfs > > Signed-off-by: Miklos Szeredi > diff -Nurp a/fs/fuse/Makefile b/fs/fuse/Makefile > --- a/fs/fuse/Makefile 2005-01-10 19:28:38.000000000 +0100 > +++ b/fs/fuse/Makefile 2005-01-10 19:28:38.000000000 +0100 > @@ -4,4 +4,4 @@ > > obj-$(CONFIG_FUSE) += fuse.o > > -fuse-objs := dev.o inode.o > +fuse-objs := dev.o dir.o inode.o > diff -Nurp a/fs/fuse/dev.c b/fs/fuse/dev.c > --- a/fs/fuse/dev.c 2005-01-10 19:28:38.000000000 +0100 > +++ b/fs/fuse/dev.c 2005-01-10 19:28:38.000000000 +0100 > @@ -642,6 +642,13 @@ static struct fuse_req *request_find(str > return NULL; > } > > +/* fget() needs to be done in this context */ > +static void process_getdir(struct fuse_req *req) > +{ > + struct fuse_getdir_out_i *arg = req->out.args[0].value; > + arg->file = fget(arg->fd); > +} > + > static int copy_out_args(struct fuse_copy_state *cs, struct fuse_out *out, > unsigned nbytes) > { > @@ -714,6 +721,8 @@ static ssize_t fuse_dev_writev(struct fi > if (!err) { > if (req->interrupted) > err = -ENOENT; > + else if (req->in.h.opcode == FUSE_GETDIR && !oh.error) > + process_getdir(req); > } else if (!req->interrupted) > req->out.h.error = -EIO; > request_end(fc, req); > diff -Nurp a/fs/fuse/dir.c b/fs/fuse/dir.c > --- a/fs/fuse/dir.c 1970-01-01 01:00:00.000000000 +0100 > +++ b/fs/fuse/dir.c 2005-01-10 19:28:38.000000000 +0100 > @@ -0,0 +1,417 @@ > +/* > + FUSE: Filesystem in Userspace > + Copyright (C) 2001-2005 Miklos Szeredi > + > + This program can be distributed under the terms of the GNU GPL. > + See the file COPYING. > +*/ > + > +#include "fuse_i.h" > + > +#include > +#include > +#include > +#include > + > +static inline unsigned long time_to_jiffies(unsigned long sec, > + unsigned long nsec) > +{ > + /* prevent wrapping of jiffies */ > + if (sec + 1 >= LONG_MAX / HZ) > + return 0; > + > + return jiffies + sec * HZ + nsec / (1000000000 / HZ); > +} Use timespec_to_jiffies ? > + > +static void fuse_lookup_init(struct fuse_req *req, struct inode *dir, > + struct dentry *entry, > + struct fuse_entry_out *outarg) > +{ > + req->in.h.opcode = FUSE_LOOKUP; > + req->in.h.nodeid = get_node_id(dir); > + req->inode = 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); > + req->out.args[0].value = outarg; > +} > + > +static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd) > +{ > + if (!entry->d_inode || is_bad_inode(entry->d_inode)) > + return 0; > + else if (entry->d_time && time_after(jiffies, entry->d_time)) { > + int err; > + int version; > + struct fuse_entry_out outarg; > + struct inode *inode = entry->d_inode; > + struct fuse_inode *fi = get_fuse_inode(inode); > + struct fuse_conn *fc = get_fuse_conn(inode); > + struct fuse_req *req = fuse_get_request_nonint(fc); > + if (!req) > + return 0; > + > + fuse_lookup_init(req, entry->d_parent->d_inode, entry, &outarg); > + request_send_nonint(fc, req); > + version = req->out.h.unique; > + err = req->out.h.error; > + fuse_put_request(fc, req); > + if (err || outarg.nodeid != get_node_id(inode) || > + (outarg.attr.mode ^ inode->i_mode) & S_IFMT) > + return 0; > + > + fuse_change_attributes(inode, &outarg.attr); > + inode->i_version = version; > + entry->d_time = time_to_jiffies(outarg.entry_valid, > + outarg.entry_valid_nsec); > + fi->i_time = time_to_jiffies(outarg.attr_valid, > + outarg.attr_valid_nsec); > + } > + return 1; > +} > + > +static struct dentry_operations fuse_dentry_operations = { > + .d_revalidate = fuse_dentry_revalidate, > +}; > + > +static int fuse_lookup_iget(struct inode *dir, struct dentry *entry, > + struct inode **inodep) > +{ > + int err; > + int version; > + struct fuse_entry_out outarg; > + struct inode *inode = NULL; > + struct fuse_conn *fc = get_fuse_conn(dir); > + struct fuse_req *req; > + > + if (entry->d_name.len > FUSE_NAME_MAX) > + return -ENAMETOOLONG; > + > + req = fuse_get_request(fc); > + if (!req) > + return -ERESTARTNOINTR; Is this trying to restart the action over and over if the system is low on memory? > + > + fuse_lookup_init(req, dir, entry, &outarg); > + request_send(fc, req); > + version = req->out.h.unique; > + err = req->out.h.error; > + if (!err) { > + inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation, > + &outarg.attr, version); > + if (!inode) { > + fuse_send_forget(fc, req, outarg.nodeid, version); > + return -ENOMEM; > + } > + } > + fuse_put_request(fc, req); > + if (err && err != -ENOENT) > + return err; > + > + if (inode) { > + struct fuse_inode *fi = get_fuse_inode(inode); > + entry->d_time = time_to_jiffies(outarg.entry_valid, > + outarg.entry_valid_nsec); > + fi->i_time = time_to_jiffies(outarg.attr_valid, > + outarg.attr_valid_nsec); > + } > + > + entry->d_op = &fuse_dentry_operations; > + *inodep = inode; > + return 0; > +} > + > +int fuse_do_getattr(struct inode *inode) > +{ > + int err; > + struct fuse_attr_out arg; > + struct fuse_conn *fc = get_fuse_conn(inode); > + struct fuse_req *req = fuse_get_request(fc); > + if (!req) > + return -ERESTARTNOINTR; > + > + req->in.h.opcode = FUSE_GETATTR; > + req->in.h.nodeid = get_node_id(inode); > + req->inode = inode; > + req->out.numargs = 1; > + req->out.args[0].size = sizeof(arg); > + req->out.args[0].value = &arg; > + request_send(fc, req); > + err = req->out.h.error; > + fuse_put_request(fc, req); > + if (!err) { > + if ((inode->i_mode ^ arg.attr.mode) & S_IFMT) { > + make_bad_inode(inode); > + err = -EIO; > + } else { > + struct fuse_inode *fi = get_fuse_inode(inode); > + fuse_change_attributes(inode, &arg.attr); > + fi->i_time = time_to_jiffies(arg.attr_valid, > + arg.attr_valid_nsec); > + } > + } > + return err; > +} > + > +static int fuse_revalidate(struct dentry *entry) > +{ > + struct inode *inode = entry->d_inode; > + struct fuse_inode *fi = get_fuse_inode(inode); > + struct fuse_conn *fc = get_fuse_conn(inode); > + > + if (get_node_id(inode) == FUSE_ROOT_ID) { > + if (current->fsuid != fc->user_id) > + return -EACCES; > + } else if (!fi->i_time || time_before_eq(jiffies, fi->i_time)) > + return 0; > + > + return fuse_do_getattr(inode); > +} > + > +static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd) > +{ > + struct fuse_conn *fc = get_fuse_conn(inode); > + > + if (current->fsuid != fc->user_id) > + return -EACCES; > + else { > + int mode = inode->i_mode; > + if ((mask & MAY_WRITE) && IS_RDONLY(inode) && > + (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))) > + return -EROFS; > + if ((mask & MAY_EXEC) && !S_ISDIR(mode) && !(mode & S_IXUGO)) > + return -EACCES; > + return 0; > + } This else clause would be better to use vfs_permission(). > +} > + > +static int parse_dirfile(char *buf, size_t nbytes, struct file *file, > + void *dstbuf, filldir_t filldir) > +{ > + while (nbytes >= FUSE_NAME_OFFSET) { > + struct fuse_dirent *dirent = (struct fuse_dirent *) buf; > + size_t reclen = FUSE_DIRENT_SIZE(dirent); > + int over; > + if (dirent->namelen > FUSE_NAME_MAX) > + return -EIO; > + if (reclen > nbytes) > + break; > + > + over = filldir(dstbuf, dirent->name, dirent->namelen, > + file->f_pos, dirent->ino, dirent->type); > + if (over) > + break; > + > + buf += reclen; > + file->f_pos += reclen; > + nbytes -= reclen; > + } > + > + return 0; > +} > + > +static int fuse_checkdir(struct file *cfile, struct file *file) > +{ > + struct inode *inode; > + if (!cfile) > + return -EIO; > + inode = cfile->f_dentry->d_inode; > + if (!S_ISREG(inode->i_mode)) { > + fput(cfile); > + return -EIO; > + } > + > + file->private_data = cfile; > + return 0; > +} > + > +static int fuse_getdir(struct file *file) > +{ > + struct inode *inode = file->f_dentry->d_inode; > + struct fuse_conn *fc = get_fuse_conn(inode); > + struct fuse_req *req = fuse_get_request(fc); > + struct fuse_getdir_out_i outarg; > + int err; > + > + if (!req) > + return -ERESTARTNOINTR; > + > + req->in.h.opcode = FUSE_GETDIR; > + req->in.h.nodeid = get_node_id(inode); > + req->inode = inode; > + req->out.numargs = 1; > + req->out.args[0].size = sizeof(struct fuse_getdir_out); > + req->out.args[0].value = &outarg; > + request_send(fc, req); > + err = req->out.h.error; > + fuse_put_request(fc, req); > + if (!err) > + err = fuse_checkdir(outarg.file, file); > + return err; > +} > + > +static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir) > +{ > + struct file *cfile = file->private_data; > + char *buf; > + int ret; > + > + if (!cfile) { > + ret = fuse_getdir(file); > + if (ret) > + return ret; > + > + cfile = file->private_data; > + } > + > + buf = (char *) __get_free_page(GFP_KERNEL); > + if (!buf) > + return -ENOMEM; > + > + ret = kernel_read(cfile, file->f_pos, buf, PAGE_SIZE); > + if (ret > 0) > + ret = parse_dirfile(buf, ret, file, dstbuf, filldir); > + > + free_page((unsigned long) buf); > + return ret; > +} > + > +static char *read_link(struct dentry *dentry) > +{ > + struct inode *inode = dentry->d_inode; > + struct fuse_conn *fc = get_fuse_conn(inode); > + struct fuse_req *req = fuse_get_request(fc); > + char *link; > + > + if (!req) > + return ERR_PTR(-ERESTARTNOINTR); > + > + link = (char *) __get_free_page(GFP_KERNEL); > + if (!link) { > + link = ERR_PTR(-ENOMEM); > + goto out; > + } > + req->in.h.opcode = FUSE_READLINK; > + req->in.h.nodeid = get_node_id(inode); > + req->inode = inode; > + req->out.argvar = 1; > + req->out.numargs = 1; > + req->out.args[0].size = PAGE_SIZE - 1; > + req->out.args[0].value = link; > + request_send(fc, req); > + if (req->out.h.error) { > + free_page((unsigned long) link); > + link = ERR_PTR(req->out.h.error); > + } else > + link[req->out.args[0].size] = '\0'; > + out: > + fuse_put_request(fc, req); > + return link; > +} > + > +static void free_link(char *link) > +{ > + if (!IS_ERR(link)) > + free_page((unsigned long) link); > +} > + > +static int fuse_readlink(struct dentry *dentry, char __user *buffer, > + int buflen) > +{ > + int ret; > + char *link; > + > + link = read_link(dentry); > + ret = vfs_readlink(dentry, buffer, buflen, link); > + free_link(link); > + return ret; > +} > + > +static int fuse_follow_link(struct dentry *dentry, struct nameidata *nd) > +{ > + int ret; > + char *link; > + > + link = read_link(dentry); > + ret = vfs_follow_link(nd, link); > + free_link(link); > + return ret; > +} If you don't have to do magic for follow_link, please use the recently added interface that is stack friendly. See: http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.7-rc1/2.6.7-rc1-mm1/broken-out/SL0-core-RC6-bk5.patch > + > +static int fuse_dir_open(struct inode *inode, struct file *file) > +{ > + file->private_data = NULL; > + return 0; > +} > + > +static int fuse_dir_release(struct inode *inode, struct file *file) > +{ > + struct file *cfile = file->private_data; > + > + if (cfile) > + fput(cfile); > + > + return 0; > +} > + > +static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry, > + struct kstat *stat) > +{ > + struct inode *inode = entry->d_inode; > + int err = fuse_revalidate(entry); > + if (!err) > + generic_fillattr(inode, stat); > + > + return err; > +} > + > +static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, > + struct nameidata *nd) > +{ > + struct inode *inode; > + int err = fuse_lookup_iget(dir, entry, &inode); > + if (err) > + return ERR_PTR(err); > + return d_splice_alias(inode, entry); > +} > + > +static struct inode_operations fuse_dir_inode_operations = { > + .lookup = fuse_lookup, > + .permission = fuse_permission, > + .getattr = fuse_getattr, > +}; > + > +static struct file_operations fuse_dir_operations = { > + .read = generic_read_dir, > + .readdir = fuse_readdir, > + .open = fuse_dir_open, > + .release = fuse_dir_release, > +}; > + > +static struct inode_operations fuse_common_inode_operations = { > + .permission = fuse_permission, > + .getattr = fuse_getattr, > +}; > + > +static struct inode_operations fuse_symlink_inode_operations = { > + .readlink = fuse_readlink, > + .follow_link = fuse_follow_link, > + .getattr = fuse_getattr, > +}; > + > +void fuse_init_common(struct inode *inode) > +{ > + inode->i_op = &fuse_common_inode_operations; > +} > + > +void fuse_init_dir(struct inode *inode) > +{ > + inode->i_op = &fuse_dir_inode_operations; > + inode->i_fop = &fuse_dir_operations; > +} > + > +void fuse_init_symlink(struct inode *inode) > +{ > + inode->i_op = &fuse_symlink_inode_operations; > +} > diff -Nurp a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h > --- a/fs/fuse/fuse_i.h 2005-01-10 19:28:38.000000000 +0100 > +++ b/fs/fuse/fuse_i.h 2005-01-10 19:28:38.000000000 +0100 > @@ -27,6 +27,9 @@ struct fuse_inode { > * and kernel */ > u64 nodeid; > > + /** The request used for sending the FORGET message */ > + struct fuse_req *forget_req; > + > /** Time in jiffies until the file attributes are valid */ > unsigned long i_time; > }; > @@ -126,6 +129,7 @@ struct fuse_req { > > /** Data for asynchronous requests */ > union { > + struct fuse_forget_in forget_in; > struct fuse_init_in_out init_in_out; > } misc; > > @@ -191,6 +195,11 @@ struct fuse_conn { > struct backing_dev_info bdi; > }; > > +struct fuse_getdir_out_i { > + int fd; > + void *file; /* Used by kernel only */ > +}; > + > static inline struct fuse_conn **get_fuse_conn_super_p(struct super_block *sb) > { > return (struct fuse_conn **) &sb->s_fs_info; > @@ -234,6 +243,38 @@ extern struct file_operations fuse_dev_o > extern spinlock_t fuse_lock; > > /** > + * Get a filled in inode > + */ > +struct inode *fuse_iget(struct super_block *sb, unsigned long nodeid, > + int generation, struct fuse_attr *attr, int version); > + > +/** > + * Send FORGET command > + */ > +void fuse_send_forget(struct fuse_conn *fc, struct fuse_req *req, > + unsigned long nodeid, int version); > + > +/** > + * Initialise inode operations on regular files and special files > + */ > +void fuse_init_common(struct inode *inode); > + > +/** > + * Initialise inode and file operations on a directory > + */ > +void fuse_init_dir(struct inode *inode); > + > +/** > + * Initialise inode operations on a symlink > + */ > +void fuse_init_symlink(struct inode *inode); > + > +/** > + * Change attributes of an inode > + */ > +void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr); > + > +/** > * Check if the connection can be released, and if yes, then free the > * connection structure > */ > @@ -301,6 +342,16 @@ void request_send_noreply(struct fuse_co > void request_send_background(struct fuse_conn *fc, struct fuse_req *req); > > /** > + * Get the attributes of a file > + */ > +int fuse_do_getattr(struct inode *inode); > + > +/** > + * Invalidate inode attributes > + */ > +void fuse_invalidate_attr(struct inode *inode); > + > +/** > * Send the INIT message > */ > void fuse_send_init(struct fuse_conn *fc); > diff -Nurp a/fs/fuse/inode.c b/fs/fuse/inode.c > --- a/fs/fuse/inode.c 2005-01-10 19:28:38.000000000 +0100 > +++ b/fs/fuse/inode.c 2005-01-10 19:28:38.000000000 +0100 > @@ -50,12 +50,20 @@ static struct inode *fuse_alloc_inode(st > > fi = get_fuse_inode(inode); > memset(fi, 0, sizeof(*fi)); > + fi->forget_req = fuse_request_alloc(); > + if (!fi->forget_req) { > + kmem_cache_free(fuse_inode_cachep, inode); > + return NULL; > + } > > return inode; > } > > static void fuse_destroy_inode(struct inode *inode) > { > + struct fuse_inode *fi = get_fuse_inode(inode); > + if (fi->forget_req) > + fuse_request_free(fi->forget_req); > kmem_cache_free(fuse_inode_cachep, inode); > } > > @@ -64,8 +72,27 @@ static void fuse_read_inode(struct inode > /* No op */ > } > > +void fuse_send_forget(struct fuse_conn *fc, struct fuse_req *req, > + unsigned long nodeid, int version) > +{ > + struct fuse_forget_in *inarg = &req->misc.forget_in; > + inarg->version = version; > + req->in.h.opcode = FUSE_FORGET; > + req->in.h.nodeid = nodeid; > + req->in.numargs = 1; > + req->in.args[0].size = sizeof(struct fuse_forget_in); > + req->in.args[0].value = inarg; > + request_send_noreply(fc, req); > +} > + > static void fuse_clear_inode(struct inode *inode) > { > + struct fuse_conn *fc = get_fuse_conn(inode); > + if (fc) { > + struct fuse_inode *fi = get_fuse_inode(inode); > + fuse_send_forget(fc, fi->forget_req, fi->nodeid, inode->i_version); > + fi->forget_req = NULL; > + } > } > > void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr) > @@ -93,6 +120,22 @@ static void fuse_init_inode(struct inode > { > inode->i_mode = attr->mode & S_IFMT; > i_size_write(inode, attr->size); > + if (S_ISREG(inode->i_mode)) { > + fuse_init_common(inode); > + } else if (S_ISDIR(inode->i_mode)) > + fuse_init_dir(inode); > + else if (S_ISLNK(inode->i_mode)) > + fuse_init_symlink(inode); > + else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || > + S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { > + fuse_init_common(inode); > + init_special_inode(inode, inode->i_mode, > + new_decode_dev(attr->rdev)); > + } else { > + /* Don't let user create weird files */ > + inode->i_mode = S_IFREG; > + fuse_init_common(inode); > + } > } > > static int fuse_inode_eq(struct inode *inode, void *_nodeidp) > @@ -157,6 +200,43 @@ static void fuse_put_super(struct super_ > spin_unlock(&fuse_lock); > } > > +static void convert_fuse_statfs(struct kstatfs *stbuf, struct fuse_kstatfs *attr) > +{ > + stbuf->f_type = FUSE_SUPER_MAGIC; > + stbuf->f_bsize = attr->bsize; > + stbuf->f_blocks = attr->blocks; > + stbuf->f_bfree = attr->bfree; > + stbuf->f_bavail = attr->bavail; > + stbuf->f_files = attr->files; > + stbuf->f_ffree = attr->ffree; > + stbuf->f_namelen = attr->namelen; > + /* fsid is left zero */ > +} > + > +static int fuse_statfs(struct super_block *sb, struct kstatfs *buf) > +{ > + struct fuse_conn *fc = get_fuse_conn_super(sb); > + struct fuse_req *req; > + struct fuse_statfs_out outarg; > + int err; > + > + req = fuse_get_request(fc); > + if (!req) > + return -ERESTARTSYS; > + > + req->in.numargs = 0; > + req->in.h.opcode = FUSE_STATFS; > + req->out.numargs = 1; > + req->out.args[0].size = sizeof(outarg); > + req->out.args[0].value = &outarg; > + request_send(fc, req); > + err = req->out.h.error; > + if (!err) > + convert_fuse_statfs(buf, &outarg.st); > + fuse_put_request(fc, req); > + return err; > +} > + > enum { > OPT_FD, > OPT_ROOTMODE, > @@ -317,6 +397,7 @@ static struct super_operations fuse_supe > .read_inode = fuse_read_inode, > .clear_inode = fuse_clear_inode, > .put_super = fuse_put_super, > + .statfs = fuse_statfs, > .show_options = fuse_show_options, > }; > > diff -Nurp a/include/linux/fuse.h b/include/linux/fuse.h > --- a/include/linux/fuse.h 2005-01-10 19:28:38.000000000 +0100 > +++ b/include/linux/fuse.h 2005-01-10 19:28:38.000000000 +0100 > @@ -42,13 +42,61 @@ struct fuse_attr { > __u32 rdev; > }; > > +struct fuse_kstatfs { > + __u64 blocks; > + __u64 bfree; > + __u64 bavail; > + __u64 files; > + __u64 ffree; > + __u32 bsize; > + __u32 namelen; > +}; > + > enum fuse_opcode { > + FUSE_LOOKUP = 1, > + FUSE_FORGET = 2, /* no reply */ > + FUSE_GETATTR = 3, > + FUSE_READLINK = 5, > + FUSE_GETDIR = 7, > + FUSE_STATFS = 17, > FUSE_INIT = 26 > }; > > /* Conservative buffer size for the client */ > #define FUSE_MAX_IN 8192 > > +#define FUSE_NAME_MAX 1024 > + > +struct fuse_entry_out { > + __u64 nodeid; /* Inode ID */ > + __u64 generation; /* Inode generation: nodeid:gen must > + be unique for the fs's lifetime */ > + __u64 entry_valid; /* Cache timeout for the name */ > + __u64 attr_valid; /* Cache timeout for the attributes */ > + __u32 entry_valid_nsec; > + __u32 attr_valid_nsec; > + struct fuse_attr attr; > +}; > + > +struct fuse_forget_in { > + __u64 version; > +}; > + > +struct fuse_attr_out { > + __u64 attr_valid; /* Cache timeout for the attributes */ > + __u32 attr_valid_nsec; > + __u32 dummy; > + struct fuse_attr attr; > +}; > + > +struct fuse_getdir_out { > + __u32 fd; > +}; > + > +struct fuse_statfs_out { > + struct fuse_kstatfs st; > +}; > + > struct fuse_init_in_out { > __u32 major; > __u32 minor; > @@ -70,3 +118,14 @@ struct fuse_out_header { > __u64 unique; > }; > > +struct fuse_dirent { > + __u64 ino; > + __u32 namelen; > + __u32 type; > + char name[0]; > +}; > + > +#define FUSE_NAME_OFFSET ((unsigned) ((struct fuse_dirent *) 0)->name) > +#define FUSE_DIRENT_ALIGN(x) (((x) + sizeof(__u64) - 1) & ~(sizeof(__u64) - 1)) > +#define FUSE_DIRENT_SIZE(d) \ > + FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen) > - > To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html - -- Mike Waychison Sun Microsystems, Inc. 1 (650) 352-5299 voice 1 (416) 202-8336 voice ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ NOTICE: The opinions expressed in this email are held by me, and may not represent the views of Sun Microsystems, Inc. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFB4v8/dQs4kOxk3/MRAhLQAJ9Gzvtn8nMI5OBB9jOtFID/ofs2BQCcDbqA BL025sBJZ+g2xuaYr5VG5aU= =TjA8 -----END PGP SIGNATURE----- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/