Support the fallocate() file operation.

[zfs.git] / module / zfs / zpl_inode.c

diff --git a/module/zfs/zpl_inode.c b/module/zfs/zpl_inode.c
index a6e0cbb..9b55337 100644 (file)
--- a/module/zfs/zpl_inode.c
+++ b/module/zfs/zpl_inode.c
@@ -51,6 +51,24 @@ zpl_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
        return d_splice_alias(ip, dentry);
 }
 
+static void
+zpl_vap_init(vattr_t *vap, struct inode *dir, struct dentry *dentry,
+    mode_t mode, cred_t *cr)
+{
+       vap->va_mask = ATTR_MODE;
+       vap->va_mode = mode;
+       vap->va_dentry = dentry;
+       vap->va_uid = crgetfsuid(cr);
+
+       if (dir && dir->i_mode & S_ISGID) {
+               vap->va_gid = dir->i_gid;
+               if (S_ISDIR(mode))
+                       vap->va_mode |= S_ISGID;
+       } else {
+               vap->va_gid = crgetfsgid(cr);
+       }
+}
+
 static int
 zpl_create(struct inode *dir, struct dentry *dentry, int mode,
     struct nameidata *nd)
@@ -62,11 +80,7 @@ zpl_create(struct inode *dir, struct dentry *dentry, int mode,
 
        crhold(cr);
        vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
-       vap->va_mode = mode;
-       vap->va_mask = ATTR_MODE;
-       vap->va_uid = crgetfsuid(cr);
-       vap->va_gid = crgetfsgid(cr);
-       vap->va_dentry = dentry;
+       zpl_vap_init(vap, dir, dentry, mode, cr);
 
        error = -zfs_create(dir, (char *)dentry->d_name.name,
            vap, 0, mode, &ip, cr, 0, NULL);
@@ -94,12 +108,8 @@ zpl_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
 
        crhold(cr);
        vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
-       vap->va_mode = mode;
-       vap->va_mask = ATTR_MODE;
+       zpl_vap_init(vap, dir, dentry, mode, cr);
        vap->va_rdev = rdev;
-       vap->va_uid = crgetfsuid(cr);
-       vap->va_gid = crgetfsgid(cr);
-       vap->va_dentry = dentry;
 
        error = -zfs_create(dir, (char *)dentry->d_name.name,
            vap, 0, mode, &ip, cr, 0, NULL);
@@ -134,11 +144,7 @@ zpl_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 
        crhold(cr);
        vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
-       vap->va_mode = S_IFDIR | mode;
-       vap->va_mask = ATTR_MODE;
-       vap->va_uid = crgetfsuid(cr);
-       vap->va_gid = crgetfsgid(cr);
-       vap->va_dentry = dentry;
+       zpl_vap_init(vap, dir, dentry, mode | S_IFDIR, cr);
 
        error = -zfs_mkdir(dir, dname(dentry), vap, &ip, cr, 0, NULL);
        kmem_free(vap, sizeof(vattr_t));
@@ -229,11 +235,7 @@ zpl_symlink(struct inode *dir, struct dentry *dentry, const char *name)
 
        crhold(cr);
        vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
-       vap->va_mode = S_IFLNK | S_IRWXUGO;
-       vap->va_mask = ATTR_MODE;
-       vap->va_uid = crgetfsuid(cr);
-       vap->va_gid = crgetfsgid(cr);
-       vap->va_dentry = dentry;
+       zpl_vap_init(vap, dir, dentry, S_IFLNK | S_IRWXUGO, cr);
 
        error = -zfs_symlink(dir, dname(dentry), vap, (char *)name, &ip, cr, 0);
        kmem_free(vap, sizeof(vattr_t));
@@ -313,6 +315,42 @@ out:
        return (error);
 }
 
+static void
+zpl_truncate_range(struct inode* ip, loff_t start, loff_t end)
+{
+       cred_t *cr = CRED();
+       flock64_t bf;
+
+       ASSERT3S(start, <=, end);
+
+       /*
+        * zfs_freesp() will interpret (len == 0) as meaning "truncate until
+        * the end of the file". We don't want that.
+        */
+       if (start == end)
+               return;
+
+       crhold(cr);
+
+       bf.l_type = F_WRLCK;
+       bf.l_whence = 0;
+       bf.l_start = start;
+       bf.l_len = end - start;
+       bf.l_pid = 0;
+       zfs_space(ip, F_FREESP, &bf, FWRITE, start, cr);
+
+       crfree(cr);
+}
+
+#ifdef HAVE_INODE_FALLOCATE
+static long
+zpl_fallocate(struct inode *ip, int mode, loff_t offset, loff_t len)
+{
+       return zpl_fallocate_common(ip, mode, offset, len);
+}
+#endif /* HAVE_INODE_FALLOCATE */
+
+
 const struct inode_operations zpl_inode_operations = {
        .create         = zpl_create,
        .link           = zpl_link,
@@ -328,6 +366,10 @@ const struct inode_operations zpl_inode_operations = {
        .getxattr       = generic_getxattr,
        .removexattr    = generic_removexattr,
        .listxattr      = zpl_xattr_list,
+       .truncate_range = zpl_truncate_range,
+#ifdef HAVE_INODE_FALLOCATE
+       .fallocate      = zpl_fallocate,
+#endif /* HAVE_INODE_FALLOCATE */
 };
 
 const struct inode_operations zpl_dir_inode_operations = {
@@ -352,6 +394,12 @@ const struct inode_operations zpl_symlink_inode_operations = {
        .readlink       = generic_readlink,
        .follow_link    = zpl_follow_link,
        .put_link       = zpl_put_link,
+       .setattr        = zpl_setattr,
+       .getattr        = zpl_getattr,
+       .setxattr       = generic_setxattr,
+       .getxattr       = generic_getxattr,
+       .removexattr    = generic_removexattr,
+       .listxattr      = zpl_xattr_list,
 };
 
 const struct inode_operations zpl_special_inode_operations = {