* Set dentry and possibly attribute timeouts from the lookup/mk*
* replies
*/
-static void fuse_change_timeout(struct dentry *entry, struct fuse_entry_out *o)
+static void fuse_change_entry_timeout(struct dentry *entry,
+ struct fuse_entry_out *o)
{
fuse_dentry_settime(entry,
time_to_jiffies(o->entry_valid, o->entry_valid_nsec));
- if (entry->d_inode)
- get_fuse_inode(entry->d_inode)->i_time =
- time_to_jiffies(o->attr_valid, o->attr_valid_nsec);
+}
+
+static u64 attr_timeout(struct fuse_attr_out *o)
+{
+ return time_to_jiffies(o->attr_valid, o->attr_valid_nsec);
+}
+
+static u64 entry_attr_timeout(struct fuse_entry_out *o)
+{
+ return time_to_jiffies(o->attr_valid, o->attr_valid_nsec);
}
/*
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;
}
+static u64 fuse_get_attr_version(struct fuse_conn *fc)
+{
+ u64 curr_version;
+
+ /*
+ * The spin lock isn't actually needed on 64bit archs, but we
+ * don't yet care too much about such optimizations.
+ */
+ spin_lock(&fc->lock);
+ curr_version = fc->attr_version;
+ spin_unlock(&fc->lock);
+
+ return curr_version;
+}
+
/*
* Check whether the dentry is still valid
*
struct fuse_req *req;
struct fuse_req *forget_req;
struct dentry *parent;
+ u64 attr_version;
/* For negative dentries, always do a fresh lookup */
if (!inode)
return 0;
}
+ attr_version = fuse_get_attr_version(fc);
+
parent = dget_parent(entry);
fuse_lookup_init(req, parent->d_inode, entry, &outarg);
request_send(fc, req);
if (err || (outarg.attr.mode ^ inode->i_mode) & S_IFMT)
return 0;
- fuse_change_attributes(inode, &outarg.attr);
- fuse_change_timeout(entry, &outarg);
+ fuse_change_attributes(inode, &outarg.attr,
+ entry_attr_timeout(&outarg),
+ attr_version);
+ fuse_change_entry_timeout(entry, &outarg);
}
return 1;
}
struct fuse_conn *fc = get_fuse_conn(dir);
struct fuse_req *req;
struct fuse_req *forget_req;
+ u64 attr_version;
if (entry->d_name.len > FUSE_NAME_MAX)
return ERR_PTR(-ENAMETOOLONG);
req = fuse_get_req(fc);
if (IS_ERR(req))
- return ERR_PTR(PTR_ERR(req));
+ return ERR_CAST(req);
forget_req = fuse_get_req(fc);
if (IS_ERR(forget_req)) {
fuse_put_request(fc, req);
- return ERR_PTR(PTR_ERR(forget_req));
+ return ERR_CAST(forget_req);
}
+ attr_version = fuse_get_attr_version(fc);
+
fuse_lookup_init(req, dir, entry, &outarg);
request_send(fc, req);
err = req->out.h.error;
err = -EIO;
if (!err && outarg.nodeid) {
inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
- &outarg.attr);
+ &outarg.attr, entry_attr_timeout(&outarg),
+ attr_version);
if (!inode) {
fuse_send_forget(fc, forget_req, outarg.nodeid, 1);
return ERR_PTR(-ENOMEM);
entry->d_op = &fuse_dentry_operations;
if (!err)
- fuse_change_timeout(entry, &outarg);
+ fuse_change_entry_timeout(entry, &outarg);
else
fuse_invalidate_entry_cache(entry);
return NULL;
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;
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;
fuse_put_request(fc, req);
inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation,
- &outentry.attr);
+ &outentry.attr, entry_attr_timeout(&outentry), 0);
if (!inode) {
flags &= ~(O_CREAT | O_EXCL | O_TRUNC);
ff->fh = outopen.fh;
}
fuse_put_request(fc, forget_req);
d_instantiate(entry, inode);
- fuse_change_timeout(entry, &outentry);
+ fuse_change_entry_timeout(entry, &outentry);
+ fuse_invalidate_attr(dir);
file = lookup_instantiate_filp(nd, entry, generic_file_open);
if (IS_ERR(file)) {
ff->fh = outopen.fh;
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;
goto out_put_forget_req;
inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
- &outarg.attr);
+ &outarg.attr, entry_attr_timeout(&outarg), 0);
if (!inode) {
fuse_send_forget(fc, forget_req, outarg.nodeid, 1);
return -ENOMEM;
} else
d_instantiate(entry, inode);
- fuse_change_timeout(entry, &outarg);
+ fuse_change_entry_timeout(entry, &outarg);
fuse_invalidate_attr(dir);
return 0;
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
+ /* ctime changes */
+ fuse_invalidate_attr(oldent->d_inode);
+
fuse_invalidate_attr(olddir);
if (olddir != newdir)
fuse_invalidate_attr(newdir);
return err;
}
-static int fuse_do_getattr(struct inode *inode)
+static void fuse_fillattr(struct inode *inode, struct fuse_attr *attr,
+ struct kstat *stat)
+{
+ stat->dev = inode->i_sb->s_dev;
+ stat->ino = attr->ino;
+ stat->mode = (inode->i_mode & S_IFMT) | (attr->mode & 07777);
+ stat->nlink = attr->nlink;
+ stat->uid = attr->uid;
+ stat->gid = attr->gid;
+ stat->rdev = inode->i_rdev;
+ stat->atime.tv_sec = attr->atime;
+ stat->atime.tv_nsec = attr->atimensec;
+ stat->mtime.tv_sec = attr->mtime;
+ stat->mtime.tv_nsec = attr->mtimensec;
+ stat->ctime.tv_sec = attr->ctime;
+ stat->ctime.tv_nsec = attr->ctimensec;
+ stat->size = attr->size;
+ stat->blocks = attr->blocks;
+ stat->blksize = (1 << inode->i_blkbits);
+}
+
+static int fuse_do_getattr(struct inode *inode, struct kstat *stat,
+ struct file *file)
{
int err;
- struct fuse_attr_out arg;
+ struct fuse_getattr_in inarg;
+ struct fuse_attr_out outarg;
struct fuse_conn *fc = get_fuse_conn(inode);
- struct fuse_req *req = fuse_get_req(fc);
+ struct fuse_req *req;
+ u64 attr_version;
+
+ req = fuse_get_req(fc);
if (IS_ERR(req))
return PTR_ERR(req);
+ attr_version = fuse_get_attr_version(fc);
+
+ 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;
+
+ inarg.getattr_flags |= FUSE_GETATTR_FH;
+ inarg.fh = ff->fh;
+ }
req->in.h.opcode = FUSE_GETATTR;
req->in.h.nodeid = get_node_id(inode);
+ req->in.numargs = 1;
+ req->in.args[0].size = sizeof(inarg);
+ req->in.args[0].value = &inarg;
req->out.numargs = 1;
- req->out.args[0].size = sizeof(arg);
- req->out.args[0].value = &arg;
+ 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;
fuse_put_request(fc, req);
if (!err) {
- if ((inode->i_mode ^ arg.attr.mode) & S_IFMT) {
+ if ((inode->i_mode ^ outarg.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);
+ fuse_change_attributes(inode, &outarg.attr,
+ attr_timeout(&outarg),
+ attr_version);
+ if (stat)
+ fuse_fillattr(inode, &outarg.attr, stat);
+ }
+ }
+ return err;
+}
+
+int fuse_update_attributes(struct inode *inode, struct kstat *stat,
+ struct file *file, bool *refreshed)
+{
+ struct fuse_inode *fi = get_fuse_inode(inode);
+ int err;
+ bool r;
+
+ if (fi->i_time < get_jiffies_64()) {
+ r = true;
+ err = fuse_do_getattr(inode, stat, file);
+ } else {
+ r = false;
+ err = 0;
+ if (stat) {
+ generic_fillattr(inode, stat);
+ stat->mode = fi->orig_i_mode;
}
}
+
+ if (refreshed != NULL)
+ *refreshed = r;
+
return err;
}
* for which the owner of the mount has ptrace privilege. This
* excludes processes started by other users, suid or sgid processes.
*/
-static int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task)
+int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task)
{
if (fc->flags & FUSE_ALLOW_OTHER)
return 1;
static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd)
{
struct fuse_conn *fc = get_fuse_conn(inode);
- struct fuse_inode *fi = get_fuse_inode(inode);
bool refreshed = false;
int err = 0;
return -EACCES;
/*
- * If attributes are needed, but are stale, refresh them
- * before proceeding
+ * If attributes are needed, refresh them before proceeding
*/
- if (((fc->flags & FUSE_DEFAULT_PERMISSIONS) || (mask & MAY_EXEC)) &&
- fi->i_time < get_jiffies_64()) {
- err = fuse_do_getattr(inode);
+ if ((fc->flags & FUSE_DEFAULT_PERMISSIONS) ||
+ ((mask & MAY_EXEC) && S_ISREG(inode->i_mode))) {
+ err = fuse_update_attributes(inode, NULL, NULL, &refreshed);
if (err)
return err;
-
- refreshed = true;
}
if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
attributes. This is also needed, because the root
node will at first have no permissions */
if (err == -EACCES && !refreshed) {
- err = fuse_do_getattr(inode);
+ err = fuse_do_getattr(inode, NULL, NULL);
if (!err)
err = generic_permission(inode, mask, NULL);
}
exist. So if permissions are revoked this won't be
noticed immediately, only after the attribute
timeout has expired */
-
- } else {
- int mode = inode->i_mode;
- if ((mask & MAY_EXEC) && !S_ISDIR(mode) && !(mode & S_IXUGO))
- return -EACCES;
-
- if (nd && (nd->flags & (LOOKUP_ACCESS | LOOKUP_CHDIR)))
- return fuse_access(inode, mask);
+ } else if (nd && (nd->flags & (LOOKUP_ACCESS | LOOKUP_CHDIR))) {
+ err = fuse_access(inode, mask);
+ } else if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode)) {
+ if (!(inode->i_mode & S_IXUGO)) {
+ if (refreshed)
+ return -EACCES;
+
+ err = fuse_do_getattr(inode, NULL, NULL);
+ if (!err && !(inode->i_mode & S_IXUGO))
+ return -EACCES;
+ }
}
return err;
}
struct page *page;
struct inode *inode = file->f_path.dentry->d_inode;
struct fuse_conn *fc = get_fuse_conn(inode);
- struct fuse_file *ff = file->private_data;
struct fuse_req *req;
if (is_bad_inode(inode))
}
req->num_pages = 1;
req->pages[0] = page;
- fuse_read_fill(req, ff, inode, file->f_pos, PAGE_SIZE, FUSE_READDIR);
+ fuse_read_fill(req, file, inode, file->f_pos, PAGE_SIZE, FUSE_READDIR);
request_send(fc, req);
nbytes = req->out.args[0].size;
err = req->out.h.error;
char *link;
if (IS_ERR(req))
- return ERR_PTR(PTR_ERR(req));
+ return ERR_CAST(req);
link = (char *) __get_free_page(GFP_KERNEL);
if (!link) {
return file ? fuse_fsync_common(file, de, datasync, 1) : 0;
}
+static bool update_mtime(unsigned ivalid)
+{
+ /* Always update if mtime is explicitly set */
+ if (ivalid & ATTR_MTIME_SET)
+ return true;
+
+ /* If it's an open(O_TRUNC) or an ftruncate(), don't update */
+ if ((ivalid & ATTR_SIZE) && (ivalid & (ATTR_OPEN | ATTR_FILE)))
+ return false;
+
+ /* In all other cases update */
+ return true;
+}
+
static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg)
{
unsigned ivalid = iattr->ia_valid;
arg->valid |= FATTR_GID, arg->gid = iattr->ia_gid;
if (ivalid & ATTR_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)) {
- arg->valid |= FATTR_ATIME | FATTR_MTIME;
+ if (ivalid & ATTR_ATIME) {
+ arg->valid |= FATTR_ATIME;
arg->atime = iattr->ia_atime.tv_sec;
- arg->mtime = iattr->ia_mtime.tv_sec;
+ arg->atimensec = iattr->ia_atime.tv_nsec;
+ if (!(ivalid & ATTR_ATIME_SET))
+ arg->valid |= FATTR_ATIME_NOW;
}
- if (ivalid & ATTR_FILE) {
- struct fuse_file *ff = iattr->ia_file->private_data;
- arg->valid |= FATTR_FH;
- arg->fh = ff->fh;
+ if ((ivalid & ATTR_MTIME) && update_mtime(ivalid)) {
+ arg->valid |= FATTR_MTIME;
+ arg->mtime = iattr->ia_mtime.tv_sec;
+ arg->mtimensec = iattr->ia_mtime.tv_nsec;
+ if (!(ivalid & ATTR_MTIME_SET))
+ arg->valid |= FATTR_MTIME_NOW;
}
}
* vmtruncate() doesn't allow for this case, so do the rlimit checking
* and the actual truncation by hand.
*/
-static int fuse_setattr(struct dentry *entry, struct iattr *attr)
+static int fuse_do_setattr(struct dentry *entry, struct iattr *attr,
+ struct file *file)
{
struct inode *inode = entry->d_inode;
struct fuse_conn *fc = get_fuse_conn(inode);
- struct fuse_inode *fi = get_fuse_inode(inode);
struct fuse_req *req;
struct fuse_setattr_in inarg;
struct fuse_attr_out outarg;
int err;
+ if (!fuse_allow_task(fc, current))
+ return -EACCES;
+
if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
err = inode_change_ok(inode, attr);
if (err)
return err;
}
+ if ((attr->ia_valid & ATTR_OPEN) && fc->atomic_o_trunc)
+ return 0;
+
if (attr->ia_valid & ATTR_SIZE) {
unsigned long limit;
if (IS_SWAPFILE(inode))
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;
+ inarg.valid |= FATTR_FH;
+ inarg.fh = ff->fh;
+ }
+ if (attr->ia_valid & ATTR_SIZE) {
+ /* For mandatory locking in truncate */
+ inarg.valid |= FATTR_LOCKOWNER;
+ inarg.lock_owner = fuse_lock_owner_id(fc, current->files);
+ }
req->in.h.opcode = FUSE_SETATTR;
req->in.h.nodeid = get_node_id(inode);
req->in.numargs = 1;
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;
return -EIO;
}
- fuse_change_attributes(inode, &outarg.attr);
- fi->i_time = time_to_jiffies(outarg.attr_valid, outarg.attr_valid_nsec);
+ fuse_change_attributes(inode, &outarg.attr, attr_timeout(&outarg), 0);
return 0;
}
+static int fuse_setattr(struct dentry *entry, struct iattr *attr)
+{
+ if (attr->ia_valid & ATTR_FILE)
+ return fuse_do_setattr(entry, attr, attr->ia_file);
+ else
+ return fuse_do_setattr(entry, attr, NULL);
+}
+
static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry,
struct kstat *stat)
{
struct inode *inode = entry->d_inode;
- struct fuse_inode *fi = get_fuse_inode(inode);
struct fuse_conn *fc = get_fuse_conn(inode);
- int err = 0;
if (!fuse_allow_task(fc, current))
return -EACCES;
- if (fi->i_time < get_jiffies_64())
- err = fuse_do_getattr(inode);
-
- if (!err)
- generic_fillattr(inode, stat);
-
- return err;
+ return fuse_update_attributes(inode, stat, NULL, NULL);
}
static int fuse_setxattr(struct dentry *entry, const char *name,
struct fuse_getxattr_out outarg;
ssize_t ret;
+ if (!fuse_allow_task(fc, current))
+ return -EACCES;
+
if (fc->no_listxattr)
return -EOPNOTSUPP;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff