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orangefs: reorganize setattr functions to track attribute changes

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OrangeFS accepts a mask indicating which attributes were changed.  The
kernel must not set any bits except those that were actually changed.
The kernel must set the uid/gid of the request to the actual uid/gid
responsible for the change.

Code path for notify_change initiated setattrs is

orangefs_setattr(dentry, iattr)
-> __orangefs_setattr(inode, iattr)

In kernel changes are initiated by calling __orangefs_setattr.

Code path for writeback is

orangefs_write_inode
-> orangefs_inode_setattr

attr_valid and attr_uid and attr_gid change together under i_lock.
I_DIRTY changes separately.

__orangefs_setattr
	lock
	if needs to be cleaned first, unlock and retry
	set attr_valid
	copy data in
	unlock
	mark_inode_dirty

orangefs_inode_setattr
	lock
	copy attributes out
	unlock
	clear getattr_time
	# __writeback_single_inode clears dirty

orangefs_inode_getattr
	# possible to get here with attr_valid set and not dirty
	lock
	if getattr_time ok or attr_valid set, unlock and return
	unlock
	do server operation
	# another thread may getattr or setattr, so check for that
	lock
	if getattr_time ok or attr_valid, unlock and return
	else, copy in
	update getattr_time
	unlock

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
This commit is contained in:
Martin Brandenburg
2018-02-13 20:13:46 +00:00
committed by Mike Marshall
parent df2d7337b5
commit afd9fb2a31
6 changed files with 129 additions and 119 deletions
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35
fs/orangefs/namei.c
View File

@@ -82,11 +82,10 @@ static int orangefs_create(struct inode *dir,
__func__,
dentry);
dir->i_mtime = dir->i_ctime = current_time(dir);
memset(&iattr, 0, sizeof iattr);
iattr.ia_valid |= ATTR_MTIME;
orangefs_inode_setattr(dir, &iattr);
mark_inode_dirty_sync(dir);
iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
__orangefs_setattr(dir, &iattr);
ret = 0;
out:
op_release(new_op);
@@ -208,11 +207,10 @@ static int orangefs_unlink(struct inode *dir, struct dentry *dentry)
if (!ret) {
drop_nlink(inode);
dir->i_mtime = dir->i_ctime = current_time(dir);
memset(&iattr, 0, sizeof iattr);
iattr.ia_valid |= ATTR_MTIME;
orangefs_inode_setattr(dir, &iattr);
mark_inode_dirty_sync(dir);
iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
__orangefs_setattr(dir, &iattr);
}
return ret;
}
@@ -295,11 +293,10 @@ static int orangefs_symlink(struct inode *dir,
get_khandle_from_ino(inode),
dentry);
dir->i_mtime = dir->i_ctime = current_time(dir);
memset(&iattr, 0, sizeof iattr);
iattr.ia_valid |= ATTR_MTIME;
orangefs_inode_setattr(dir, &iattr);
mark_inode_dirty_sync(dir);
iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
__orangefs_setattr(dir, &iattr);
ret = 0;
out:
op_release(new_op);
@@ -366,11 +363,10 @@ static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode
* NOTE: we have no good way to keep nlink consistent for directories
* across clients; keep constant at 1.
*/
dir->i_mtime = dir->i_ctime = current_time(dir);
memset(&iattr, 0, sizeof iattr);
iattr.ia_valid |= ATTR_MTIME;
orangefs_inode_setattr(dir, &iattr);
mark_inode_dirty_sync(dir);
iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
__orangefs_setattr(dir, &iattr);
out:
op_release(new_op);
return ret;
@@ -393,11 +389,10 @@ static int orangefs_rename(struct inode *old_dir,
"orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
old_dentry, new_dentry, d_count(new_dentry));
new_dir->i_mtime = new_dir->i_ctime = current_time(new_dir);
memset(&iattr, 0, sizeof iattr);
iattr.ia_valid |= ATTR_MTIME;
orangefs_inode_setattr(new_dir, &iattr);
mark_inode_dirty_sync(new_dir);
iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
iattr.ia_mtime = iattr.ia_ctime = current_time(new_dir);
__orangefs_setattr(new_dir, &iattr);
new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
if (!new_op)