->atomic_open() prototype change - pass int * instead of bool *

... and let finish_open() report having opened the file via that sucker.
Next step: don't modify od->filp at all.

[AV: FILE_CREATE was already used by cifs; Miklos' fix folded]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

14 files changed, 63 insertions, 52 deletions

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 8157488c3463..af4e45bd6cfa 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -64,7 +64,7 @@ ata *);
         void (*update_time)(struct inode *, struct timespec *, int);
         struct file * (*atomic_open)(struct inode *, struct dentry *,
                                 struct opendata *, unsigned open_flag,
-                                umode_t create_mode, bool *created);
+                                umode_t create_mode, int *opened);
 
 locking rules:
         all may block
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index beb6e691f70a..d7121051afcd 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -366,7 +366,7 @@ struct inode_operations {
         void (*update_time)(struct inode *, struct timespec *, int);
         struct file * (*atomic_open)(struct inode *, struct dentry *,
                                 struct opendata *, unsigned open_flag,
-                                umode_t create_mode, bool *created);
+                                umode_t create_mode, int *opened);
 };
 
 Again, all methods are called without any locks being held, unless
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index e8c42ceb89ba..de626b3b342f 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -859,7 +859,7 @@ error:
 static struct file *
 v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
                      struct opendata *od, unsigned flags, umode_t mode,
-                     bool *created)
+                     int *opened)
 {
         int err;
         u32 perm;
@@ -918,7 +918,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
                 v9inode->writeback_fid = (void *) inode_fid;
         }
         mutex_unlock(&v9inode->v_mutex);
-        filp = finish_open(od, dentry, generic_file_open);
+        filp = finish_open(od, dentry, generic_file_open, opened);
         if (IS_ERR(filp)) {
                 err = PTR_ERR(filp);
                 goto error;
@@ -930,7 +930,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
                 v9fs_cache_inode_set_cookie(dentry->d_inode, filp);
 #endif
 
-        *created = true;
+        *opened |= FILE_CREATED;
 out:
         dput(res);
         return filp;
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index a354fe2cb234..3db55471bc93 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -243,7 +243,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
 static struct file *
 v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
                           struct opendata *od, unsigned flags, umode_t omode,
-                          bool *created)
+                          int *opened)
 {
         int err = 0;
         gid_t gid;
@@ -357,7 +357,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
         }
         mutex_unlock(&v9inode->v_mutex);
         /* Since we are opening a file, assign the open fid to the file */
-        filp = finish_open(od, dentry, generic_file_open);
+        filp = finish_open(od, dentry, generic_file_open, opened);
         if (IS_ERR(filp)) {
                 err = PTR_ERR(filp);
                 goto err_clunk_old_fid;
@@ -367,7 +367,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
         if (v9ses->cache)
                 v9fs_cache_inode_set_cookie(inode, filp);
 #endif
-        *created = true;
+        *opened |= FILE_CREATED;
 out:
         dput(res);
         return filp;
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 75df600ec9b4..81e5e908df9d 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -636,7 +636,7 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
 
 struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
                               struct opendata *od, unsigned flags, umode_t mode,
-                              bool *created)
+                              int *opened)
 {
         int err;
         struct dentry *res = NULL;
@@ -650,7 +650,7 @@ struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
                 if (err < 0)
                         return ERR_PTR(err);
 
-                return ceph_lookup_open(dir, dentry, od, flags, mode);
+                return ceph_lookup_open(dir, dentry, od, flags, mode, opened);
         }
 
         if (d_unhashed(dentry)) {
@@ -668,8 +668,8 @@ struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
                 return NULL;
         }
 
-        *created = true;
-        filp = ceph_lookup_open(dir, dentry, od, flags, mode);
+        *opened |= FILE_CREATED;
+        filp = ceph_lookup_open(dir, dentry, od, flags, mode, opened);
         dput(res);
 
         return filp;
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index e34dc22e75a9..4c304a90d046 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -214,7 +214,8 @@ out:
  * ceph_release gets called).  So fear not!
  */
 struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
-                              struct opendata *od, unsigned flags, umode_t mode)
+                              struct opendata *od, unsigned flags, umode_t mode,
+                              int *opened)
 {
         struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
         struct ceph_mds_client *mdsc = fsc->mdsc;
@@ -247,7 +248,7 @@ struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
                 err = ceph_handle_notrace_create(dir, dentry);
         if (err)
                 goto out;
-        file = finish_open(od, req->r_dentry, ceph_open);
+        file = finish_open(od, req->r_dentry, ceph_open, opened);
         if (IS_ERR(file))
                 err = PTR_ERR(file);
 out:
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index e61e54673e56..f9a325108b49 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -808,7 +808,7 @@ extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
 extern int ceph_open(struct inode *inode, struct file *file);
 extern struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
                                      struct opendata *od, unsigned flags,
-                                     umode_t mode);
+                                     umode_t mode, int *opened);
 extern int ceph_release(struct inode *inode, struct file *filp);
 
 /* dir.c */
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 3a572bf5947f..92a7c3d8a031 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -48,7 +48,7 @@ extern int cifs_create(struct inode *, struct dentry *, umode_t,
                        struct nameidata *);
 extern struct file *cifs_atomic_open(struct inode *, struct dentry *,
                                      struct opendata *, unsigned, umode_t,
-                                     bool *);
+                                     int *);
 extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
                                   struct nameidata *);
 extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 7a3dcd15d681..6cdf23fd70ee 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -160,7 +160,7 @@ check_name(struct dentry *direntry)
 static int cifs_do_create(struct inode *inode, struct dentry *direntry,
                           int xid, struct tcon_link *tlink, unsigned oflags,
                           umode_t mode, __u32 *oplock, __u16 *fileHandle,
-                          bool *created)
+                          int *created)
 {
         int rc = -ENOENT;
         int create_options = CREATE_NOT_DIR;
@@ -311,7 +311,7 @@ static int cifs_do_create(struct inode *inode, struct dentry *direntry,
                                 .device = 0,
                 };
 
-                *created = true;
+                *created |= FILE_CREATED;
                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
                         args.uid = (__u64) current_fsuid();
                         if (inode->i_mode & S_ISGID)
@@ -379,7 +379,7 @@ out:
 struct file *
 cifs_atomic_open(struct inode *inode, struct dentry *direntry,
                  struct opendata *od, unsigned oflags, umode_t mode,
-                 bool *created)
+                 int *opened)
 {
         int rc;
         int xid;
@@ -426,14 +426,14 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
         tcon = tlink_tcon(tlink);
 
         rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
-                            &oplock, &fileHandle, created);
+                            &oplock, &fileHandle, opened);
 
         if (rc) {
                 filp = ERR_PTR(rc);
                 goto out;
         }
 
-        filp = finish_open(od, direntry, generic_file_open);
+        filp = finish_open(od, direntry, generic_file_open, opened);
         if (IS_ERR(filp)) {
                 CIFSSMBClose(xid, tcon, fileHandle);
                 goto out;
@@ -469,7 +469,7 @@ int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
         struct tcon_link *tlink;
         __u16 fileHandle;
         __u32 oplock;
-        bool created = true;
+        int created = FILE_CREATED;
 
         cFYI(1, "cifs_create parent inode = 0x%p name is: %s and dentry = 0x%p",
              inode, direntry->d_name.name, direntry);
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index e42442f1da16..345f78ee5c9d 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -371,7 +371,7 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
  */
 static struct file *fuse_create_open(struct inode *dir, struct dentry *entry,
                                      struct opendata *od, unsigned flags,
-                                     umode_t mode)
+                                     umode_t mode, int *opened)
 {
         int err;
         struct inode *inode;
@@ -450,7 +450,7 @@ static struct file *fuse_create_open(struct inode *dir, struct dentry *entry,
         d_instantiate(entry, inode);
         fuse_change_entry_timeout(entry, &outentry);
         fuse_invalidate_attr(dir);
-        file = finish_open(od, entry, generic_file_open);
+        file = finish_open(od, entry, generic_file_open, opened);
         if (IS_ERR(file)) {
                 fuse_sync_release(ff, flags);
         } else {
@@ -472,7 +472,7 @@ out_err:
 static int fuse_mknod(struct inode *, struct dentry *, umode_t, dev_t);
 static struct file *fuse_atomic_open(struct inode *dir, struct dentry *entry,
                                      struct opendata *od, unsigned flags,
-                                     umode_t mode, bool *created)
+                                     umode_t mode, int *opened)
 {
         int err;
         struct fuse_conn *fc = get_fuse_conn(dir);
@@ -492,12 +492,12 @@ static struct file *fuse_atomic_open(struct inode *dir, struct dentry *entry,
                 goto no_open;
 
         /* Only creates */
-        *created = true;
+        *opened |= FILE_CREATED;
 
         if (fc->no_create)
                 goto mknod;
 
-        file = fuse_create_open(dir, entry, od, flags, mode);
+        file = fuse_create_open(dir, entry, od, flags, mode, opened);
         if (PTR_ERR(file) == -ENOSYS) {
                 fc->no_create = 1;
                 goto mknod;
diff --git a/fs/namei.c b/fs/namei.c
index 4bc4bc6a6938..7a33f074e5bd 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2197,7 +2197,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
                                 struct path *path, struct opendata *od,
                                 const struct open_flags *op,
                                 bool *want_write, bool need_lookup,
-                                bool *created)
+                                int *opened)
 {
         struct inode *dir =  nd->path.dentry->d_inode;
         unsigned open_flag = open_to_namei_flags(op->open_flag);
@@ -2222,7 +2222,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
 
         if (open_flag & O_EXCL) {
                 open_flag &= ~O_TRUNC;
-                *created = true;
+                *opened |= FILE_CREATED;
         }
 
         /*
@@ -2272,7 +2272,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
         od->dentry = DENTRY_NOT_SET;
         od->mnt = nd->path.mnt;
         filp = dir->i_op->atomic_open(dir, dentry, od, open_flag, mode,
-                                      created);
+                                      opened);
         if (IS_ERR(filp)) {
                 if (WARN_ON(od->dentry != DENTRY_NOT_SET))
                         dput(od->dentry);
@@ -2283,7 +2283,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
         }
 
         acc_mode = op->acc_mode;
-        if (*created) {
+        if (*opened & FILE_CREATED) {
                 fsnotify_create(dir, dentry);
                 acc_mode = MAY_OPEN;
         }
@@ -2353,7 +2353,7 @@ looked_up:
 static struct file *lookup_open(struct nameidata *nd, struct path *path,
                                 struct opendata *od,
                                 const struct open_flags *op,
-                                bool *want_write, bool *created)
+                                bool *want_write, int *opened)
 {
         struct dentry *dir = nd->path.dentry;
         struct inode *dir_inode = dir->d_inode;
@@ -2361,7 +2361,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
         int error;
         bool need_lookup;
 
-        *created = false;
+        *opened &= ~FILE_CREATED;
         dentry = lookup_dcache(&nd->last, dir, nd, &need_lookup);
         if (IS_ERR(dentry))
                 return ERR_CAST(dentry);
@@ -2372,7 +2372,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
 
         if ((nd->flags & LOOKUP_OPEN) && dir_inode->i_op->atomic_open) {
                 return atomic_open(nd, dentry, path, od, op, want_write,
-                                   need_lookup, created);
+                                   need_lookup, opened);
         }
 
         if (need_lookup) {
@@ -2399,7 +2399,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
                 if (error)
                         goto out_dput;
                 *want_write = true;
-                *created = true;
+                *opened |= FILE_CREATED;
                 error = security_path_mknod(&nd->path, dentry, mode, 0);
                 if (error)
                         goto out_dput;
@@ -2422,7 +2422,7 @@ out_dput:
  */
 static struct file *do_last(struct nameidata *nd, struct path *path,
                             struct opendata *od, const struct open_flags *op,
-                            const char *pathname)
+                            int *opened, const char *pathname)
 {
         struct dentry *dir = nd->path.dentry;
         int open_flag = op->open_flag;
@@ -2431,7 +2431,6 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
         int acc_mode = op->acc_mode;
         struct file *filp;
         struct inode *inode;
-        bool created;
         bool symlink_ok = false;
         struct path save_parent = { .dentry = NULL, .mnt = NULL };
         bool retried = false;
@@ -2499,21 +2498,22 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
 
 retry_lookup:
         mutex_lock(&dir->d_inode->i_mutex);
-        filp = lookup_open(nd, path, od, op, &want_write, &created);
+        filp = lookup_open(nd, path, od, op, &want_write, opened);
         mutex_unlock(&dir->d_inode->i_mutex);
 
         if (filp) {
                 if (IS_ERR(filp))
                         goto out;
 
-                if (created || !S_ISREG(filp->f_path.dentry->d_inode->i_mode))
+                if ((*opened & FILE_CREATED) ||
+                    !S_ISREG(filp->f_path.dentry->d_inode->i_mode))
                         will_truncate = false;
 
                 audit_inode(pathname, filp->f_path.dentry);
                 goto opened;
         }
 
-        if (created) {
+        if (*opened & FILE_CREATED) {
                 /* Don't check for write permission, don't truncate */
                 open_flag &= ~O_TRUNC;
                 will_truncate = false;
@@ -2606,7 +2606,7 @@ finish_open_created:
         if (error)
                 goto exit;
         od->mnt = nd->path.mnt;
-        filp = finish_open(od, nd->path.dentry, NULL);
+        filp = finish_open(od, nd->path.dentry, NULL, opened);
         if (IS_ERR(filp)) {
                 if (filp == ERR_PTR(-EOPENSTALE))
                         goto stale_open;
@@ -2667,6 +2667,7 @@ static struct file *path_openat(int dfd, const char *pathname,
         struct opendata od;
         struct file *res;
         struct path path;
+        int opened = 0;
         int error;
 
         od.filp = get_empty_filp();
@@ -2684,7 +2685,7 @@ static struct file *path_openat(int dfd, const char *pathname,
         if (unlikely(error))
                 goto out_filp;
 
-        res = do_last(nd, &path, &od, op, pathname);
+        res = do_last(nd, &path, &od, op, &opened, pathname);
         while (unlikely(!res)) { /* trailing symlink */
                 struct path link = path;
                 void *cookie;
@@ -2699,7 +2700,7 @@ static struct file *path_openat(int dfd, const char *pathname,
                 error = follow_link(&link, nd, &cookie);
                 if (unlikely(error))
                         goto out_filp;
-                res = do_last(nd, &path, &od, op, pathname);
+                res = do_last(nd, &path, &od, op, &opened, pathname);
                 put_link(nd, &link, cookie);
         }
 out:
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index e6d55dc93ffd..6deb2549ead5 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -113,7 +113,7 @@ const struct inode_operations nfs3_dir_inode_operations = {
 
 static struct file *nfs_atomic_open(struct inode *, struct dentry *,
                                     struct opendata *, unsigned, umode_t,
-                                    bool *);
+                                    int *);
 const struct inode_operations nfs4_dir_inode_operations = {
         .create         = nfs_create,
         .lookup         = nfs_lookup,
@@ -1389,7 +1389,8 @@ static int do_open(struct inode *inode, struct file *filp)
 
 static struct file *nfs_finish_open(struct nfs_open_context *ctx,
                                     struct dentry *dentry,
-                                    struct opendata *od, unsigned open_flags)
+                                    struct opendata *od, unsigned open_flags,
+                                    int *opened)
 {
         struct file *filp;
         int err;
@@ -1408,7 +1409,7 @@ static struct file *nfs_finish_open(struct nfs_open_context *ctx,
                 }
         }
 
-        filp = finish_open(od, dentry, do_open);
+        filp = finish_open(od, dentry, do_open, opened);
         if (!IS_ERR(filp))
                 nfs_file_set_open_context(filp, ctx);
 
@@ -1419,7 +1420,7 @@ out:
 
 static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
                                     struct opendata *od, unsigned open_flags,
-                                    umode_t mode, bool *created)
+                                    umode_t mode, int *opened)
 {
         struct nfs_open_context *ctx;
         struct dentry *res;
@@ -1497,7 +1498,7 @@ static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
         nfs_unblock_sillyrename(dentry->d_parent);
         nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
 
-        filp = nfs_finish_open(ctx, dentry, od, open_flags);
+        filp = nfs_finish_open(ctx, dentry, od, open_flags, opened);
 
         dput(res);
         return filp;
diff --git a/fs/open.c b/fs/open.c
index 937f4ec20180..89589bd3993c 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -782,7 +782,8 @@ static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
  * filesystem callback is substituted.
  */
 struct file *finish_open(struct opendata *od, struct dentry *dentry,
-                         int (*open)(struct inode *, struct file *))
+                         int (*open)(struct inode *, struct file *),
+                         int *opened)
 {
         struct file *res;
 
@@ -790,8 +791,10 @@ struct file *finish_open(struct opendata *od, struct dentry *dentry,
         dget(dentry);
 
         res = do_dentry_open(dentry, od->mnt, od->filp, open, current_cred());
-        if (!IS_ERR(res))
+        if (!IS_ERR(res)) {
+                *opened |= FILE_OPENED;
                 od->filp = NULL;
+        }
 
         return res;
 }
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0314635cf833..a7618cf28d0e 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1696,7 +1696,7 @@ struct inode_operations {
         int (*update_time)(struct inode *, struct timespec *, int);
         struct file * (*atomic_open)(struct inode *, struct dentry *,
                                      struct opendata *, unsigned open_flag,
-                                     umode_t create_mode, bool *created);
+                                     umode_t create_mode, int *opened);
 } ____cacheline_aligned;
 
 struct seq_file;
@@ -2065,8 +2065,13 @@ extern struct file * dentry_open(struct dentry *, struct vfsmount *, int,
                                  const struct cred *);
 extern int filp_close(struct file *, fl_owner_t id);
 extern char * getname(const char __user *);
+enum {
+        FILE_CREATED = 1,
+        FILE_OPENED = 2
+};
 extern struct file *finish_open(struct opendata *od, struct dentry *dentry,
-                                int (*open)(struct inode *, struct file *));
+                                int (*open)(struct inode *, struct file *),
+                                int *opened);
 extern void finish_no_open(struct opendata *od, struct dentry *dentry);
 
 /* fs/ioctl.c */