Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / jfs / file.c

diff --git a/kernel/fs/jfs/file.c b/kernel/fs/jfs/file.c
new file mode 100644 (file)
index 0000000..e98d39d
--- /dev/null
+++ b/kernel/fs/jfs/file.c
@@ -0,0 +1,165 @@
+/*
+ *   Copyright (C) International Business Machines Corp., 2000-2002
+ *   Portions Copyright (C) Christoph Hellwig, 2001-2002
+ *
+ *   This program is free software;  you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program;  if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/posix_acl.h>
+#include <linux/quotaops.h>
+#include "jfs_incore.h"
+#include "jfs_inode.h"
+#include "jfs_dmap.h"
+#include "jfs_txnmgr.h"
+#include "jfs_xattr.h"
+#include "jfs_acl.h"
+#include "jfs_debug.h"
+
+int jfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+       struct inode *inode = file->f_mapping->host;
+       int rc = 0;
+
+       rc = filemap_write_and_wait_range(inode->i_mapping, start, end);
+       if (rc)
+               return rc;
+
+       mutex_lock(&inode->i_mutex);
+       if (!(inode->i_state & I_DIRTY_ALL) ||
+           (datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
+               /* Make sure committed changes hit the disk */
+               jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
+               mutex_unlock(&inode->i_mutex);
+               return rc;
+       }
+
+       rc |= jfs_commit_inode(inode, 1);
+       mutex_unlock(&inode->i_mutex);
+
+       return rc ? -EIO : 0;
+}
+
+static int jfs_open(struct inode *inode, struct file *file)
+{
+       int rc;
+
+       if ((rc = dquot_file_open(inode, file)))
+               return rc;
+
+       /*
+        * We attempt to allow only one "active" file open per aggregate
+        * group.  Otherwise, appending to files in parallel can cause
+        * fragmentation within the files.
+        *
+        * If the file is empty, it was probably just created and going
+        * to be written to.  If it has a size, we'll hold off until the
+        * file is actually grown.
+        */
+       if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
+           (inode->i_size == 0)) {
+               struct jfs_inode_info *ji = JFS_IP(inode);
+               spin_lock_irq(&ji->ag_lock);
+               if (ji->active_ag == -1) {
+                       struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb);
+                       ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb);
+                       atomic_inc( &jfs_sb->bmap->db_active[ji->active_ag]);
+               }
+               spin_unlock_irq(&ji->ag_lock);
+       }
+
+       return 0;
+}
+static int jfs_release(struct inode *inode, struct file *file)
+{
+       struct jfs_inode_info *ji = JFS_IP(inode);
+
+       spin_lock_irq(&ji->ag_lock);
+       if (ji->active_ag != -1) {
+               struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
+               atomic_dec(&bmap->db_active[ji->active_ag]);
+               ji->active_ag = -1;
+       }
+       spin_unlock_irq(&ji->ag_lock);
+
+       return 0;
+}
+
+int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
+{
+       struct inode *inode = d_inode(dentry);
+       int rc;
+
+       rc = inode_change_ok(inode, iattr);
+       if (rc)
+               return rc;
+
+       if (is_quota_modification(inode, iattr))
+               dquot_initialize(inode);
+       if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) ||
+           (iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) {
+               rc = dquot_transfer(inode, iattr);
+               if (rc)
+                       return rc;
+       }
+
+       if ((iattr->ia_valid & ATTR_SIZE) &&
+           iattr->ia_size != i_size_read(inode)) {
+               inode_dio_wait(inode);
+
+               rc = inode_newsize_ok(inode, iattr->ia_size);
+               if (rc)
+                       return rc;
+
+               truncate_setsize(inode, iattr->ia_size);
+               jfs_truncate(inode);
+       }
+
+       setattr_copy(inode, iattr);
+       mark_inode_dirty(inode);
+
+       if (iattr->ia_valid & ATTR_MODE)
+               rc = posix_acl_chmod(inode, inode->i_mode);
+       return rc;
+}
+
+const struct inode_operations jfs_file_inode_operations = {
+       .setxattr       = jfs_setxattr,
+       .getxattr       = jfs_getxattr,
+       .listxattr      = jfs_listxattr,
+       .removexattr    = jfs_removexattr,
+       .setattr        = jfs_setattr,
+#ifdef CONFIG_JFS_POSIX_ACL
+       .get_acl        = jfs_get_acl,
+       .set_acl        = jfs_set_acl,
+#endif
+};
+
+const struct file_operations jfs_file_operations = {
+       .open           = jfs_open,
+       .llseek         = generic_file_llseek,
+       .read_iter      = generic_file_read_iter,
+       .write_iter     = generic_file_write_iter,
+       .mmap           = generic_file_mmap,
+       .splice_read    = generic_file_splice_read,
+       .splice_write   = iter_file_splice_write,
+       .fsync          = jfs_fsync,
+       .release        = jfs_release,
+       .unlocked_ioctl = jfs_ioctl,
+#ifdef CONFIG_COMPAT
+       .compat_ioctl   = jfs_compat_ioctl,
+#endif
+};