Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 153 insertions, 0 deletions

diff --git a/fs/jfs/file.c b/fs/jfs/file.c
new file mode 100644
index 000000000..332dc9ac4
--- /dev/null
+++ b/fs/jfs/file.c
@@ -0,0 +1,153 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *   Copyright (C) International Business Machines Corp., 2000-2002
+ *   Portions Copyright (C) Christoph Hellwig, 2001-2002
+ */
+
+#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 = file_write_and_wait_range(file, start, end);
+	if (rc)
+		return rc;
+
+	inode_lock(inode);
+	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);
+		inode_unlock(inode);
+		return rc;
+	}
+
+	rc |= jfs_commit_inode(inode, 1);
+	inode_unlock(inode);
+
+	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 user_namespace *mnt_userns, struct dentry *dentry,
+		struct iattr *iattr)
+{
+	struct inode *inode = d_inode(dentry);
+	int rc;
+
+	rc = setattr_prepare(&init_user_ns, dentry, iattr);
+	if (rc)
+		return rc;
+
+	if (is_quota_modification(mnt_userns, inode, iattr)) {
+		rc = dquot_initialize(inode);
+		if (rc)
+			return rc;
+	}
+	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(mnt_userns, 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(&init_user_ns, inode, iattr);
+	mark_inode_dirty(inode);
+
+	if (iattr->ia_valid & ATTR_MODE)
+		rc = posix_acl_chmod(&init_user_ns, inode, inode->i_mode);
+	return rc;
+}
+
+const struct inode_operations jfs_file_inode_operations = {
+	.listxattr	= jfs_listxattr,
+	.setattr	= jfs_setattr,
+	.fileattr_get	= jfs_fileattr_get,
+	.fileattr_set	= jfs_fileattr_set,
+#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,
+	.compat_ioctl	= compat_ptr_ioctl,
+};