stop passing nameidata * to ->d_revalidate()
[linux-3.10.git] / fs / fuse / dir.c
index bd5a772..eba30bd 100644 (file)
@@ -1,6 +1,6 @@
 /*
   FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2006  Miklos Szeredi <miklos@szeredi.hu>
+  Copyright (C) 2001-2008  Miklos Szeredi <miklos@szeredi.hu>
 
   This program can be distributed under the terms of the GNU GPL.
   See the file COPYING.
@@ -10,9 +10,9 @@
 
 #include <linux/pagemap.h>
 #include <linux/file.h>
-#include <linux/gfp.h>
 #include <linux/sched.h>
 #include <linux/namei.h>
+#include <linux/slab.h>
 
 #if BITS_PER_LONG >= 64
 static inline void fuse_dentry_settime(struct dentry *entry, u64 time)
@@ -63,13 +63,21 @@ static u64 time_to_jiffies(unsigned long sec, unsigned long nsec)
  * 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);
 }
 
 /*
@@ -89,7 +97,7 @@ void fuse_invalidate_attr(struct inode *inode)
  * timeout is unknown (unlink, rmdir, rename and in some cases
  * lookup)
  */
-static void fuse_invalidate_entry_cache(struct dentry *entry)
+void fuse_invalidate_entry_cache(struct dentry *entry)
 {
        fuse_dentry_settime(entry, 0);
 }
@@ -104,20 +112,39 @@ static void fuse_invalidate_entry(struct dentry *entry)
        fuse_invalidate_entry_cache(entry);
 }
 
-static void fuse_lookup_init(struct fuse_req *req, struct inode *dir,
-                            struct dentry *entry,
+static void fuse_lookup_init(struct fuse_conn *fc, struct fuse_req *req,
+                            u64 nodeid, struct qstr *name,
                             struct fuse_entry_out *outarg)
 {
+       memset(outarg, 0, sizeof(struct fuse_entry_out));
        req->in.h.opcode = FUSE_LOOKUP;
-       req->in.h.nodeid = get_node_id(dir);
+       req->in.h.nodeid = nodeid;
        req->in.numargs = 1;
-       req->in.args[0].size = entry->d_name.len + 1;
-       req->in.args[0].value = entry->d_name.name;
+       req->in.args[0].size = name->len + 1;
+       req->in.args[0].value = 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;
 }
 
+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
  *
@@ -127,10 +154,11 @@ static void fuse_lookup_init(struct fuse_req *req, struct inode *dir,
  * the lookup once more.  If the lookup results in the same inode,
  * then refresh the attributes, timeouts and mark the dentry valid.
  */
-static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
+static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags)
 {
-       struct inode *inode = entry->d_inode;
+       struct inode *inode;
 
+       inode = ACCESS_ONCE(entry->d_inode);
        if (inode && is_bad_inode(inode))
                return 0;
        else if (fuse_dentry_time(entry) < get_jiffies_64()) {
@@ -138,27 +166,34 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
                struct fuse_entry_out outarg;
                struct fuse_conn *fc;
                struct fuse_req *req;
-               struct fuse_req *forget_req;
+               struct fuse_forget_link *forget;
                struct dentry *parent;
+               u64 attr_version;
 
                /* For negative dentries, always do a fresh lookup */
                if (!inode)
                        return 0;
 
+               if (flags & LOOKUP_RCU)
+                       return -ECHILD;
+
                fc = get_fuse_conn(inode);
                req = fuse_get_req(fc);
                if (IS_ERR(req))
                        return 0;
 
-               forget_req = fuse_get_req(fc);
-               if (IS_ERR(forget_req)) {
+               forget = fuse_alloc_forget();
+               if (!forget) {
                        fuse_put_request(fc, req);
                        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);
+               fuse_lookup_init(fc, req, get_node_id(parent->d_inode),
+                                &entry->d_name, &outarg);
+               fuse_request_send(fc, req);
                dput(parent);
                err = req->out.h.error;
                fuse_put_request(fc, req);
@@ -168,20 +203,21 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
                if (!err) {
                        struct fuse_inode *fi = get_fuse_inode(inode);
                        if (outarg.nodeid != get_node_id(inode)) {
-                               fuse_send_forget(fc, forget_req,
-                                                outarg.nodeid, 1);
+                               fuse_queue_forget(fc, forget, outarg.nodeid, 1);
                                return 0;
                        }
                        spin_lock(&fc->lock);
-                       fi->nlookup ++;
+                       fi->nlookup++;
                        spin_unlock(&fc->lock);
                }
-               fuse_put_request(fc, forget_req);
+               kfree(forget);
                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;
 }
@@ -191,7 +227,7 @@ static int invalid_nodeid(u64 nodeid)
        return !nodeid || nodeid == FUSE_ROOT_ID;
 }
 
-static struct dentry_operations fuse_dentry_operations = {
+const struct dentry_operations fuse_dentry_operations = {
        .d_revalidate   = fuse_dentry_revalidate,
 };
 
@@ -205,95 +241,126 @@ int fuse_valid_type(int m)
  * Add a directory inode to a dentry, ensuring that no other dentry
  * refers to this inode.  Called with fc->inst_mutex.
  */
-static int fuse_d_add_directory(struct dentry *entry, struct inode *inode)
+static struct dentry *fuse_d_add_directory(struct dentry *entry,
+                                          struct inode *inode)
 {
        struct dentry *alias = d_find_alias(inode);
-       if (alias) {
+       if (alias && !(alias->d_flags & DCACHE_DISCONNECTED)) {
                /* This tries to shrink the subtree below alias */
                fuse_invalidate_entry(alias);
                dput(alias);
-               if (!list_empty(&inode->i_dentry))
-                       return -EBUSY;
+               if (!hlist_empty(&inode->i_dentry))
+                       return ERR_PTR(-EBUSY);
+       } else {
+               dput(alias);
        }
-       d_add(entry, inode);
-       return 0;
+       return d_splice_alias(inode, entry);
 }
 
-static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
-                                 struct nameidata *nd)
+int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name,
+                    struct fuse_entry_out *outarg, struct inode **inode)
 {
-       int err;
-       struct fuse_entry_out outarg;
-       struct inode *inode = NULL;
-       struct fuse_conn *fc = get_fuse_conn(dir);
+       struct fuse_conn *fc = get_fuse_conn_super(sb);
        struct fuse_req *req;
-       struct fuse_req *forget_req;
+       struct fuse_forget_link *forget;
+       u64 attr_version;
+       int err;
 
-       if (entry->d_name.len > FUSE_NAME_MAX)
-               return ERR_PTR(-ENAMETOOLONG);
+       *inode = NULL;
+       err = -ENAMETOOLONG;
+       if (name->len > FUSE_NAME_MAX)
+               goto out;
 
        req = fuse_get_req(fc);
+       err = PTR_ERR(req);
        if (IS_ERR(req))
-               return ERR_PTR(PTR_ERR(req));
+               goto out;
 
-       forget_req = fuse_get_req(fc);
-       if (IS_ERR(forget_req)) {
+       forget = fuse_alloc_forget();
+       err = -ENOMEM;
+       if (!forget) {
                fuse_put_request(fc, req);
-               return ERR_PTR(PTR_ERR(forget_req));
+               goto out;
        }
 
-       fuse_lookup_init(req, dir, entry, &outarg);
-       request_send(fc, req);
+       attr_version = fuse_get_attr_version(fc);
+
+       fuse_lookup_init(fc, req, nodeid, name, outarg);
+       fuse_request_send(fc, req);
        err = req->out.h.error;
        fuse_put_request(fc, req);
        /* Zero nodeid is same as -ENOENT, but with valid timeout */
-       if (!err && outarg.nodeid &&
-           (invalid_nodeid(outarg.nodeid) ||
-            !fuse_valid_type(outarg.attr.mode)))
-               err = -EIO;
-       if (!err && outarg.nodeid) {
-               inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
-                                 &outarg.attr);
-               if (!inode) {
-                       fuse_send_forget(fc, forget_req, outarg.nodeid, 1);
-                       return ERR_PTR(-ENOMEM);
-               }
+       if (err || !outarg->nodeid)
+               goto out_put_forget;
+
+       err = -EIO;
+       if (!outarg->nodeid)
+               goto out_put_forget;
+       if (!fuse_valid_type(outarg->attr.mode))
+               goto out_put_forget;
+
+       *inode = fuse_iget(sb, outarg->nodeid, outarg->generation,
+                          &outarg->attr, entry_attr_timeout(outarg),
+                          attr_version);
+       err = -ENOMEM;
+       if (!*inode) {
+               fuse_queue_forget(fc, forget, outarg->nodeid, 1);
+               goto out;
+       }
+       err = 0;
+
+ out_put_forget:
+       kfree(forget);
+ out:
+       return err;
+}
+
+static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
+                                 struct nameidata *nd)
+{
+       int err;
+       struct fuse_entry_out outarg;
+       struct inode *inode;
+       struct dentry *newent;
+       struct fuse_conn *fc = get_fuse_conn(dir);
+       bool outarg_valid = true;
+
+       err = fuse_lookup_name(dir->i_sb, get_node_id(dir), &entry->d_name,
+                              &outarg, &inode);
+       if (err == -ENOENT) {
+               outarg_valid = false;
+               err = 0;
        }
-       fuse_put_request(fc, forget_req);
-       if (err && err != -ENOENT)
-               return ERR_PTR(err);
+       if (err)
+               goto out_err;
+
+       err = -EIO;
+       if (inode && get_node_id(inode) == FUSE_ROOT_ID)
+               goto out_iput;
 
        if (inode && S_ISDIR(inode->i_mode)) {
                mutex_lock(&fc->inst_mutex);
-               err = fuse_d_add_directory(entry, inode);
+               newent = fuse_d_add_directory(entry, inode);
                mutex_unlock(&fc->inst_mutex);
-               if (err) {
-                       iput(inode);
-                       return ERR_PTR(err);
-               }
-       } else
-               d_add(entry, inode);
+               err = PTR_ERR(newent);
+               if (IS_ERR(newent))
+                       goto out_iput;
+       } else {
+               newent = d_splice_alias(inode, entry);
+       }
 
-       entry->d_op = &fuse_dentry_operations;
-       if (!err)
-               fuse_change_timeout(entry, &outarg);
+       entry = newent ? newent : entry;
+       if (outarg_valid)
+               fuse_change_entry_timeout(entry, &outarg);
        else
                fuse_invalidate_entry_cache(entry);
-       return NULL;
-}
 
-/*
- * Synchronous release for the case when something goes wrong in CREATE_OPEN
- */
-static void fuse_sync_release(struct fuse_conn *fc, struct fuse_file *ff,
-                             u64 nodeid, int flags)
-{
-       struct fuse_req *req;
+       return newent;
 
-       req = fuse_release_fill(ff, nodeid, flags, FUSE_RELEASE);
-       req->force = 1;
-       request_send(fc, req);
-       fuse_put_request(fc, req);
+ out_iput:
+       iput(inode);
+ out_err:
+       return ERR_PTR(err);
 }
 
 /*
@@ -302,27 +369,24 @@ static void fuse_sync_release(struct fuse_conn *fc, struct fuse_file *ff,
  * If the filesystem doesn't support this, then fall back to separate
  * 'mknod' + 'open' requests.
  */
-static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
-                           struct nameidata *nd)
+static int fuse_create_open(struct inode *dir, struct dentry *entry,
+                           struct file *file, unsigned flags,
+                           umode_t mode, int *opened)
 {
        int err;
        struct inode *inode;
        struct fuse_conn *fc = get_fuse_conn(dir);
        struct fuse_req *req;
-       struct fuse_req *forget_req;
-       struct fuse_open_in inarg;
+       struct fuse_forget_link *forget;
+       struct fuse_create_in inarg;
        struct fuse_open_out outopen;
        struct fuse_entry_out outentry;
        struct fuse_file *ff;
-       struct file *file;
-       int flags = nd->intent.open.flags - 1;
-
-       if (fc->no_create)
-               return -ENOSYS;
 
-       forget_req = fuse_get_req(fc);
-       if (IS_ERR(forget_req))
-               return PTR_ERR(forget_req);
+       forget = fuse_alloc_forget();
+       err = -ENOMEM;
+       if (!forget)
+               goto out_err;
 
        req = fuse_get_req(fc);
        err = PTR_ERR(req);
@@ -330,67 +394,122 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
                goto out_put_forget_req;
 
        err = -ENOMEM;
-       ff = fuse_file_alloc();
+       ff = fuse_file_alloc(fc);
        if (!ff)
                goto out_put_request;
 
+       if (!fc->dont_mask)
+               mode &= ~current_umask();
+
        flags &= ~O_NOCTTY;
        memset(&inarg, 0, sizeof(inarg));
+       memset(&outentry, 0, sizeof(outentry));
        inarg.flags = flags;
        inarg.mode = mode;
+       inarg.umask = current_umask();
        req->in.h.opcode = FUSE_CREATE;
        req->in.h.nodeid = get_node_id(dir);
        req->in.numargs = 2;
-       req->in.args[0].size = sizeof(inarg);
+       req->in.args[0].size = fc->minor < 12 ? sizeof(struct fuse_open_in) :
+                                               sizeof(inarg);
        req->in.args[0].value = &inarg;
        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;
-       request_send(fc, req);
+       fuse_request_send(fc, req);
        err = req->out.h.error;
-       if (err) {
-               if (err == -ENOSYS)
-                       fc->no_create = 1;
+       if (err)
                goto out_free_ff;
-       }
 
        err = -EIO;
        if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid))
                goto out_free_ff;
 
        fuse_put_request(fc, req);
+       ff->fh = outopen.fh;
+       ff->nodeid = outentry.nodeid;
+       ff->open_flags = outopen.open_flags;
        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_sync_release(fc, ff, outentry.nodeid, flags);
-               fuse_send_forget(fc, forget_req, outentry.nodeid, 1);
-               return -ENOMEM;
+               fuse_sync_release(ff, flags);
+               fuse_queue_forget(fc, forget, outentry.nodeid, 1);
+               err = -ENOMEM;
+               goto out_err;
        }
-       fuse_put_request(fc, forget_req);
+       kfree(forget);
        d_instantiate(entry, inode);
-       fuse_change_timeout(entry, &outentry);
-       file = lookup_instantiate_filp(nd, entry, generic_file_open);
-       if (IS_ERR(file)) {
-               ff->fh = outopen.fh;
-               fuse_sync_release(fc, ff, outentry.nodeid, flags);
-               return PTR_ERR(file);
+       fuse_change_entry_timeout(entry, &outentry);
+       fuse_invalidate_attr(dir);
+       err = finish_open(file, entry, generic_file_open, opened);
+       if (err) {
+               fuse_sync_release(ff, flags);
+       } else {
+               file->private_data = fuse_file_get(ff);
+               fuse_finish_open(inode, file);
        }
-       fuse_finish_open(inode, file, ff, &outopen);
-       return 0;
+       return err;
 
- out_free_ff:
+out_free_ff:
        fuse_file_free(ff);
- out_put_request:
+out_put_request:
        fuse_put_request(fc, req);
- out_put_forget_req:
-       fuse_put_request(fc, forget_req);
+out_put_forget_req:
+       kfree(forget);
+out_err:
+       return err;
+}
+
+static int fuse_mknod(struct inode *, struct dentry *, umode_t, dev_t);
+static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
+                           struct file *file, unsigned flags,
+                           umode_t mode, int *opened)
+{
+       int err;
+       struct fuse_conn *fc = get_fuse_conn(dir);
+       struct dentry *res = NULL;
+
+       if (d_unhashed(entry)) {
+               res = fuse_lookup(dir, entry, NULL);
+               if (IS_ERR(res))
+                       return PTR_ERR(res);
+
+               if (res)
+                       entry = res;
+       }
+
+       if (!(flags & O_CREAT) || entry->d_inode)
+               goto no_open;
+
+       /* Only creates */
+       *opened |= FILE_CREATED;
+
+       if (fc->no_create)
+               goto mknod;
+
+       err = fuse_create_open(dir, entry, file, flags, mode, opened);
+       if (err == -ENOSYS) {
+               fc->no_create = 1;
+               goto mknod;
+       }
+out_dput:
+       dput(res);
        return err;
+
+mknod:
+       err = fuse_mknod(dir, entry, mode, 0);
+       if (err)
+               goto out_dput;
+no_open:
+       return finish_no_open(file, res);
 }
 
 /*
@@ -398,24 +517,28 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
  */
 static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req,
                            struct inode *dir, struct dentry *entry,
-                           int mode)
+                           umode_t mode)
 {
        struct fuse_entry_out outarg;
        struct inode *inode;
        int err;
-       struct fuse_req *forget_req;
+       struct fuse_forget_link *forget;
 
-       forget_req = fuse_get_req(fc);
-       if (IS_ERR(forget_req)) {
+       forget = fuse_alloc_forget();
+       if (!forget) {
                fuse_put_request(fc, req);
-               return PTR_ERR(forget_req);
+               return -ENOMEM;
        }
 
+       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);
+       fuse_request_send(fc, req);
        err = req->out.h.error;
        fuse_put_request(fc, req);
        if (err)
@@ -429,12 +552,12 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req,
                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);
+               fuse_queue_forget(fc, forget, outarg.nodeid, 1);
                return -ENOMEM;
        }
-       fuse_put_request(fc, forget_req);
+       kfree(forget);
 
        if (S_ISDIR(inode->i_mode)) {
                struct dentry *alias;
@@ -452,16 +575,16 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req,
        } else
                d_instantiate(entry, inode);
 
-       fuse_change_timeout(entry, &outarg);
+       fuse_change_entry_timeout(entry, &outarg);
        fuse_invalidate_attr(dir);
        return 0;
 
  out_put_forget_req:
-       fuse_put_request(fc, forget_req);
+       kfree(forget);
        return err;
 }
 
-static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode,
+static int fuse_mknod(struct inode *dir, struct dentry *entry, umode_t mode,
                      dev_t rdev)
 {
        struct fuse_mknod_in inarg;
@@ -470,31 +593,30 @@ static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode,
        if (IS_ERR(req))
                return PTR_ERR(req);
 
+       if (!fc->dont_mask)
+               mode &= ~current_umask();
+
        memset(&inarg, 0, sizeof(inarg));
        inarg.mode = mode;
        inarg.rdev = new_encode_dev(rdev);
+       inarg.umask = current_umask();
        req->in.h.opcode = FUSE_MKNOD;
        req->in.numargs = 2;
-       req->in.args[0].size = sizeof(inarg);
+       req->in.args[0].size = fc->minor < 12 ? FUSE_COMPAT_MKNOD_IN_SIZE :
+                                               sizeof(inarg);
        req->in.args[0].value = &inarg;
        req->in.args[1].size = entry->d_name.len + 1;
        req->in.args[1].value = entry->d_name.name;
        return create_new_entry(fc, req, dir, entry, mode);
 }
 
-static int fuse_create(struct inode *dir, struct dentry *entry, int mode,
+static int fuse_create(struct inode *dir, struct dentry *entry, umode_t mode,
                       struct nameidata *nd)
 {
-       if (nd && (nd->flags & LOOKUP_OPEN)) {
-               int err = fuse_create_open(dir, entry, mode, nd);
-               if (err != -ENOSYS)
-                       return err;
-               /* Fall back on mknod */
-       }
        return fuse_mknod(dir, entry, mode, 0);
 }
 
-static int fuse_mkdir(struct inode *dir, struct dentry *entry, int mode)
+static int fuse_mkdir(struct inode *dir, struct dentry *entry, umode_t mode)
 {
        struct fuse_mkdir_in inarg;
        struct fuse_conn *fc = get_fuse_conn(dir);
@@ -502,8 +624,12 @@ static int fuse_mkdir(struct inode *dir, struct dentry *entry, int mode)
        if (IS_ERR(req))
                return PTR_ERR(req);
 
+       if (!fc->dont_mask)
+               mode &= ~current_umask();
+
        memset(&inarg, 0, sizeof(inarg));
        inarg.mode = mode;
+       inarg.umask = current_umask();
        req->in.h.opcode = FUSE_MKDIR;
        req->in.numargs = 2;
        req->in.args[0].size = sizeof(inarg);
@@ -544,16 +670,17 @@ static int fuse_unlink(struct inode *dir, struct dentry *entry)
        req->in.numargs = 1;
        req->in.args[0].size = entry->d_name.len + 1;
        req->in.args[0].value = entry->d_name.name;
-       request_send(fc, req);
+       fuse_request_send(fc, req);
        err = req->out.h.error;
        fuse_put_request(fc, req);
        if (!err) {
                struct inode *inode = entry->d_inode;
+               struct fuse_inode *fi = get_fuse_inode(inode);
 
-               /* Set nlink to zero so the inode can be cleared, if
-                   the inode does have more links this will be
-                   discovered at the next lookup/getattr */
-               clear_nlink(inode);
+               spin_lock(&fc->lock);
+               fi->attr_version = ++fc->attr_version;
+               drop_nlink(inode);
+               spin_unlock(&fc->lock);
                fuse_invalidate_attr(inode);
                fuse_invalidate_attr(dir);
                fuse_invalidate_entry_cache(entry);
@@ -575,7 +702,7 @@ static int fuse_rmdir(struct inode *dir, struct dentry *entry)
        req->in.numargs = 1;
        req->in.args[0].size = entry->d_name.len + 1;
        req->in.args[0].value = entry->d_name.name;
-       request_send(fc, req);
+       fuse_request_send(fc, req);
        err = req->out.h.error;
        fuse_put_request(fc, req);
        if (!err) {
@@ -594,6 +721,7 @@ static int fuse_rename(struct inode *olddir, struct dentry *oldent,
        struct fuse_rename_in inarg;
        struct fuse_conn *fc = get_fuse_conn(olddir);
        struct fuse_req *req = fuse_get_req(fc);
+
        if (IS_ERR(req))
                return PTR_ERR(req);
 
@@ -608,17 +736,22 @@ static int fuse_rename(struct inode *olddir, struct dentry *oldent,
        req->in.args[1].value = oldent->d_name.name;
        req->in.args[2].size = newent->d_name.len + 1;
        req->in.args[2].value = newent->d_name.name;
-       request_send(fc, req);
+       fuse_request_send(fc, req);
        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);
 
                /* newent will end up negative */
-               if (newent->d_inode)
+               if (newent->d_inode) {
+                       fuse_invalidate_attr(newent->d_inode);
                        fuse_invalidate_entry_cache(newent);
+               }
        } else if (err == -EINTR) {
                /* If request was interrupted, DEITY only knows if the
                   rename actually took place.  If the invalidation
@@ -659,39 +792,191 @@ static int fuse_link(struct dentry *entry, struct inode *newdir,
           will reflect changes in the backing inode (link count,
           etc.)
        */
-       if (!err || err == -EINTR)
+       if (!err) {
+               struct fuse_inode *fi = get_fuse_inode(inode);
+
+               spin_lock(&fc->lock);
+               fi->attr_version = ++fc->attr_version;
+               inc_nlink(inode);
+               spin_unlock(&fc->lock);
+               fuse_invalidate_attr(inode);
+       } else if (err == -EINTR) {
                fuse_invalidate_attr(inode);
+       }
        return err;
 }
 
-int fuse_do_getattr(struct inode *inode)
+static void fuse_fillattr(struct inode *inode, struct fuse_attr *attr,
+                         struct kstat *stat)
+{
+       unsigned int blkbits;
+
+       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;
+
+       if (attr->blksize != 0)
+               blkbits = ilog2(attr->blksize);
+       else
+               blkbits = inode->i_sb->s_blocksize_bits;
+
+       stat->blksize = 1 << 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;
-       request_send(fc, req);
+       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;
+       fuse_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;
+                       stat->ino = fi->orig_ino;
                }
        }
+
+       if (refreshed != NULL)
+               *refreshed = r;
+
+       return err;
+}
+
+int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid,
+                            u64 child_nodeid, struct qstr *name)
+{
+       int err = -ENOTDIR;
+       struct inode *parent;
+       struct dentry *dir;
+       struct dentry *entry;
+
+       parent = ilookup5(sb, parent_nodeid, fuse_inode_eq, &parent_nodeid);
+       if (!parent)
+               return -ENOENT;
+
+       mutex_lock(&parent->i_mutex);
+       if (!S_ISDIR(parent->i_mode))
+               goto unlock;
+
+       err = -ENOENT;
+       dir = d_find_alias(parent);
+       if (!dir)
+               goto unlock;
+
+       entry = d_lookup(dir, name);
+       dput(dir);
+       if (!entry)
+               goto unlock;
+
+       fuse_invalidate_attr(parent);
+       fuse_invalidate_entry(entry);
+
+       if (child_nodeid != 0 && entry->d_inode) {
+               mutex_lock(&entry->d_inode->i_mutex);
+               if (get_node_id(entry->d_inode) != child_nodeid) {
+                       err = -ENOENT;
+                       goto badentry;
+               }
+               if (d_mountpoint(entry)) {
+                       err = -EBUSY;
+                       goto badentry;
+               }
+               if (S_ISDIR(entry->d_inode->i_mode)) {
+                       shrink_dcache_parent(entry);
+                       if (!simple_empty(entry)) {
+                               err = -ENOTEMPTY;
+                               goto badentry;
+                       }
+                       entry->d_inode->i_flags |= S_DEAD;
+               }
+               dont_mount(entry);
+               clear_nlink(entry->d_inode);
+               err = 0;
+ badentry:
+               mutex_unlock(&entry->d_inode->i_mutex);
+               if (!err)
+                       d_delete(entry);
+       } else {
+               err = 0;
+       }
+       dput(entry);
+
+ unlock:
+       mutex_unlock(&parent->i_mutex);
+       iput(parent);
        return err;
 }
 
@@ -708,44 +993,27 @@ int fuse_do_getattr(struct inode *inode)
  * 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;
+       const struct cred *cred;
+       int ret;
 
-       if (task->euid == fc->user_id &&
-           task->suid == fc->user_id &&
-           task->uid == fc->user_id &&
-           task->egid == fc->group_id &&
-           task->sgid == fc->group_id &&
-           task->gid == fc->group_id)
+       if (fc->flags & FUSE_ALLOW_OTHER)
                return 1;
 
-       return 0;
-}
-
-/*
- * Check whether the inode attributes are still valid
- *
- * If the attribute validity timeout has expired, then fetch the fresh
- * attributes with a 'getattr' request
- *
- * I'm not sure why cached attributes are never returned for the root
- * inode, this is probably being too cautious.
- */
-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 (!fuse_allow_task(fc, current))
-               return -EACCES;
-       if (get_node_id(inode) != FUSE_ROOT_ID &&
-           fi->i_time >= get_jiffies_64())
-               return 0;
+       rcu_read_lock();
+       ret = 0;
+       cred = __task_cred(task);
+       if (cred->euid == fc->user_id &&
+           cred->suid == fc->user_id &&
+           cred->uid  == fc->user_id &&
+           cred->egid == fc->group_id &&
+           cred->sgid == fc->group_id &&
+           cred->gid  == fc->group_id)
+               ret = 1;
+       rcu_read_unlock();
 
-       return fuse_do_getattr(inode);
+       return ret;
 }
 
 static int fuse_access(struct inode *inode, int mask)
@@ -763,13 +1031,13 @@ static int fuse_access(struct inode *inode, int mask)
                return PTR_ERR(req);
 
        memset(&inarg, 0, sizeof(inarg));
-       inarg.mask = mask;
+       inarg.mask = mask & (MAY_READ | MAY_WRITE | MAY_EXEC);
        req->in.h.opcode = FUSE_ACCESS;
        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;
-       request_send(fc, req);
+       fuse_request_send(fc, req);
        err = req->out.h.error;
        fuse_put_request(fc, req);
        if (err == -ENOSYS) {
@@ -779,6 +1047,14 @@ static int fuse_access(struct inode *inode, int mask)
        return err;
 }
 
+static int fuse_perm_getattr(struct inode *inode, int mask)
+{
+       if (mask & MAY_NOT_BLOCK)
+               return -ECHILD;
+
+       return fuse_do_getattr(inode, NULL, NULL);
+}
+
 /*
  * Check permission.  The two basic access models of FUSE are:
  *
@@ -792,39 +1068,63 @@ static int fuse_access(struct inode *inode, int mask)
  * access request is sent.  Execute permission is still checked
  * locally based on file mode.
  */
-static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd)
+static int fuse_permission(struct inode *inode, int mask)
 {
        struct fuse_conn *fc = get_fuse_conn(inode);
+       bool refreshed = false;
+       int err = 0;
 
        if (!fuse_allow_task(fc, current))
                return -EACCES;
-       else if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
-               int err = generic_permission(inode, mask, NULL);
+
+       /*
+        * If attributes are needed, refresh them before proceeding
+        */
+       if ((fc->flags & FUSE_DEFAULT_PERMISSIONS) ||
+           ((mask & MAY_EXEC) && S_ISREG(inode->i_mode))) {
+               struct fuse_inode *fi = get_fuse_inode(inode);
+
+               if (fi->i_time < get_jiffies_64()) {
+                       refreshed = true;
+
+                       err = fuse_perm_getattr(inode, mask);
+                       if (err)
+                               return err;
+               }
+       }
+
+       if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
+               err = generic_permission(inode, mask);
 
                /* If permission is denied, try to refresh file
                   attributes.  This is also needed, because the root
                   node will at first have no permissions */
-               if (err == -EACCES) {
-                       err = fuse_do_getattr(inode);
+               if (err == -EACCES && !refreshed) {
+                       err = fuse_perm_getattr(inode, mask);
                        if (!err)
-                               err = generic_permission(inode, mask, NULL);
+                               err = generic_permission(inode, mask);
                }
 
                /* Note: the opposite of the above test does not
                   exist.  So if permissions are revoked this won't be
                   noticed immediately, only after the attribute
                   timeout has expired */
-
-               return err;
-       } 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);
-               return 0;
+       } else if (mask & (MAY_ACCESS | MAY_CHDIR)) {
+               if (mask & MAY_NOT_BLOCK)
+                       return -ECHILD;
+
+               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_perm_getattr(inode, mask);
+                       if (!err && !(inode->i_mode & S_IXUGO))
+                               return -EACCES;
+               }
        }
+       return err;
 }
 
 static int parse_dirfile(char *buf, size_t nbytes, struct file *file,
@@ -873,10 +1173,11 @@ static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
                fuse_put_request(fc, req);
                return -ENOMEM;
        }
+       req->out.argpages = 1;
        req->num_pages = 1;
        req->pages[0] = page;
-       fuse_read_fill(req, file, inode, file->f_pos, PAGE_SIZE, FUSE_READDIR);
-       request_send(fc, req);
+       fuse_read_fill(req, file, file->f_pos, PAGE_SIZE, FUSE_READDIR);
+       fuse_request_send(fc, req);
        nbytes = req->out.args[0].size;
        err = req->out.h.error;
        fuse_put_request(fc, req);
@@ -897,7 +1198,7 @@ static char *read_link(struct dentry *dentry)
        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) {
@@ -910,7 +1211,7 @@ static char *read_link(struct dentry *dentry)
        req->out.numargs = 1;
        req->out.args[0].size = PAGE_SIZE - 1;
        req->out.args[0].value = link;
-       request_send(fc, req);
+       fuse_request_send(fc, req);
        if (req->out.h.error) {
                free_page((unsigned long) link);
                link = ERR_PTR(req->out.h.error);
@@ -941,18 +1242,58 @@ static void fuse_put_link(struct dentry *dentry, struct nameidata *nd, void *c)
 
 static int fuse_dir_open(struct inode *inode, struct file *file)
 {
-       return fuse_open_common(inode, file, 1);
+       return fuse_open_common(inode, file, true);
 }
 
 static int fuse_dir_release(struct inode *inode, struct file *file)
 {
-       return fuse_release_common(inode, file, 1);
+       fuse_release_common(file, FUSE_RELEASEDIR);
+
+       return 0;
+}
+
+static int fuse_dir_fsync(struct file *file, loff_t start, loff_t end,
+                         int datasync)
+{
+       return fuse_fsync_common(file, start, end, datasync, 1);
 }
 
-static int fuse_dir_fsync(struct file *file, struct dentry *de, int datasync)
+static long fuse_dir_ioctl(struct file *file, unsigned int cmd,
+                           unsigned long arg)
 {
-       /* nfsd can call this with no file */
-       return file ? fuse_fsync_common(file, de, datasync, 1) : 0;
+       struct fuse_conn *fc = get_fuse_conn(file->f_mapping->host);
+
+       /* FUSE_IOCTL_DIR only supported for API version >= 7.18 */
+       if (fc->minor < 18)
+               return -ENOTTY;
+
+       return fuse_ioctl_common(file, cmd, arg, FUSE_IOCTL_DIR);
+}
+
+static long fuse_dir_compat_ioctl(struct file *file, unsigned int cmd,
+                                  unsigned long arg)
+{
+       struct fuse_conn *fc = get_fuse_conn(file->f_mapping->host);
+
+       if (fc->minor < 18)
+               return -ENOTTY;
+
+       return fuse_ioctl_common(file, cmd, arg,
+                                FUSE_IOCTL_COMPAT | FUSE_IOCTL_DIR);
+}
+
+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)
@@ -967,34 +1308,64 @@ static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg)
                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;
        }
 }
 
-static void fuse_vmtruncate(struct inode *inode, loff_t offset)
+/*
+ * Prevent concurrent writepages on inode
+ *
+ * This is done by adding a negative bias to the inode write counter
+ * and waiting for all pending writes to finish.
+ */
+void fuse_set_nowrite(struct inode *inode)
 {
        struct fuse_conn *fc = get_fuse_conn(inode);
-       int need_trunc;
+       struct fuse_inode *fi = get_fuse_inode(inode);
+
+       BUG_ON(!mutex_is_locked(&inode->i_mutex));
 
        spin_lock(&fc->lock);
-       need_trunc = inode->i_size > offset;
-       i_size_write(inode, offset);
+       BUG_ON(fi->writectr < 0);
+       fi->writectr += FUSE_NOWRITE;
        spin_unlock(&fc->lock);
+       wait_event(fi->page_waitq, fi->writectr == FUSE_NOWRITE);
+}
 
-       if (need_trunc) {
-               struct address_space *mapping = inode->i_mapping;
-               unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
-               truncate_inode_pages(mapping, offset);
-       }
+/*
+ * Allow writepages on inode
+ *
+ * Remove the bias from the writecounter and send any queued
+ * writepages.
+ */
+static void __fuse_release_nowrite(struct inode *inode)
+{
+       struct fuse_inode *fi = get_fuse_inode(inode);
+
+       BUG_ON(fi->writectr != FUSE_NOWRITE);
+       fi->writectr = 0;
+       fuse_flush_writepages(inode);
+}
+
+void fuse_release_nowrite(struct inode *inode)
+{
+       struct fuse_conn *fc = get_fuse_conn(inode);
+
+       spin_lock(&fc->lock);
+       __fuse_release_nowrite(inode);
+       spin_unlock(&fc->lock);
 }
 
 /*
@@ -1005,78 +1376,131 @@ static void fuse_vmtruncate(struct inode *inode, loff_t offset)
  * 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;
+       bool is_truncate = false;
+       loff_t oldsize;
        int err;
-       int is_truncate = 0;
 
-       if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
-               err = inode_change_ok(inode, attr);
-               if (err)
-                       return err;
-       }
+       if (!fuse_allow_task(fc, current))
+               return -EACCES;
 
-       if (attr->ia_valid & ATTR_SIZE) {
-               unsigned long limit;
-               is_truncate = 1;
-               if (IS_SWAPFILE(inode))
-                       return -ETXTBSY;
-               limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
-               if (limit != RLIM_INFINITY && attr->ia_size > (loff_t) limit) {
-                       send_sig(SIGXFSZ, current, 0);
-                       return -EFBIG;
-               }
+       if (!(fc->flags & FUSE_DEFAULT_PERMISSIONS))
+               attr->ia_valid |= ATTR_FORCE;
+
+       err = inode_change_ok(inode, attr);
+       if (err)
+               return err;
+
+       if (attr->ia_valid & ATTR_OPEN) {
+               if (fc->atomic_o_trunc)
+                       return 0;
+               file = NULL;
        }
 
+       if (attr->ia_valid & ATTR_SIZE)
+               is_truncate = true;
+
        req = fuse_get_req(fc);
        if (IS_ERR(req))
                return PTR_ERR(req);
 
+       if (is_truncate)
+               fuse_set_nowrite(inode);
+
        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);
+       fuse_request_send(fc, req);
        err = req->out.h.error;
        fuse_put_request(fc, req);
-       if (!err) {
-               if ((inode->i_mode ^ outarg.attr.mode) & S_IFMT) {
-                       make_bad_inode(inode);
-                       err = -EIO;
-               } else {
-                       if (is_truncate)
-                               fuse_vmtruncate(inode, outarg.attr.size);
-                       fuse_change_attributes(inode, &outarg.attr);
-                       fi->i_time = time_to_jiffies(outarg.attr_valid,
-                                                    outarg.attr_valid_nsec);
-               }
-       } else if (err == -EINTR)
-               fuse_invalidate_attr(inode);
+       if (err) {
+               if (err == -EINTR)
+                       fuse_invalidate_attr(inode);
+               goto error;
+       }
+
+       if ((inode->i_mode ^ outarg.attr.mode) & S_IFMT) {
+               make_bad_inode(inode);
+               err = -EIO;
+               goto error;
+       }
+
+       spin_lock(&fc->lock);
+       fuse_change_attributes_common(inode, &outarg.attr,
+                                     attr_timeout(&outarg));
+       oldsize = inode->i_size;
+       i_size_write(inode, outarg.attr.size);
+
+       if (is_truncate) {
+               /* NOTE: this may release/reacquire fc->lock */
+               __fuse_release_nowrite(inode);
+       }
+       spin_unlock(&fc->lock);
+
+       /*
+        * Only call invalidate_inode_pages2() after removing
+        * FUSE_NOWRITE, otherwise fuse_launder_page() would deadlock.
+        */
+       if (S_ISREG(inode->i_mode) && oldsize != outarg.attr.size) {
+               truncate_pagecache(inode, oldsize, outarg.attr.size);
+               invalidate_inode_pages2(inode->i_mapping);
+       }
+
+       return 0;
+
+error:
+       if (is_truncate)
+               fuse_release_nowrite(inode);
 
        return err;
 }
 
+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;
-       int err = fuse_revalidate(entry);
-       if (!err)
-               generic_fillattr(inode, stat);
+       struct fuse_conn *fc = get_fuse_conn(inode);
 
-       return err;
+       if (!fuse_allow_task(fc, current))
+               return -EACCES;
+
+       return fuse_update_attributes(inode, stat, NULL, NULL);
 }
 
 static int fuse_setxattr(struct dentry *entry, const char *name,
@@ -1107,7 +1531,7 @@ static int fuse_setxattr(struct dentry *entry, const char *name,
        req->in.args[1].value = name;
        req->in.args[2].size = size;
        req->in.args[2].value = value;
-       request_send(fc, req);
+       fuse_request_send(fc, req);
        err = req->out.h.error;
        fuse_put_request(fc, req);
        if (err == -ENOSYS) {
@@ -1153,7 +1577,7 @@ static ssize_t fuse_getxattr(struct dentry *entry, const char *name,
                req->out.args[0].size = sizeof(outarg);
                req->out.args[0].value = &outarg;
        }
-       request_send(fc, req);
+       fuse_request_send(fc, req);
        ret = req->out.h.error;
        if (!ret)
                ret = size ? req->out.args[0].size : outarg.size;
@@ -1176,6 +1600,9 @@ static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size)
        struct fuse_getxattr_out outarg;
        ssize_t ret;
 
+       if (!fuse_allow_task(fc, current))
+               return -EACCES;
+
        if (fc->no_listxattr)
                return -EOPNOTSUPP;
 
@@ -1200,7 +1627,7 @@ static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size)
                req->out.args[0].size = sizeof(outarg);
                req->out.args[0].value = &outarg;
        }
-       request_send(fc, req);
+       fuse_request_send(fc, req);
        ret = req->out.h.error;
        if (!ret)
                ret = size ? req->out.args[0].size : outarg.size;
@@ -1233,7 +1660,7 @@ static int fuse_removexattr(struct dentry *entry, const char *name)
        req->in.numargs = 1;
        req->in.args[0].size = strlen(name) + 1;
        req->in.args[0].value = name;
-       request_send(fc, req);
+       fuse_request_send(fc, req);
        err = req->out.h.error;
        fuse_put_request(fc, req);
        if (err == -ENOSYS) {
@@ -1253,6 +1680,7 @@ static const struct inode_operations fuse_dir_inode_operations = {
        .link           = fuse_link,
        .setattr        = fuse_setattr,
        .create         = fuse_create,
+       .atomic_open    = fuse_atomic_open,
        .mknod          = fuse_mknod,
        .permission     = fuse_permission,
        .getattr        = fuse_getattr,
@@ -1269,6 +1697,8 @@ static const struct file_operations fuse_dir_operations = {
        .open           = fuse_dir_open,
        .release        = fuse_dir_release,
        .fsync          = fuse_dir_fsync,
+       .unlocked_ioctl = fuse_dir_ioctl,
+       .compat_ioctl   = fuse_dir_compat_ioctl,
 };
 
 static const struct inode_operations fuse_common_inode_operations = {