inode.c 59.9 KB
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#include <linux/ceph/ceph_debug.h>
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#include <linux/module.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#include <linux/kernel.h>
#include <linux/writeback.h>
#include <linux/vmalloc.h>
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#include <linux/xattr.h>
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#include <linux/posix_acl.h>
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#include <linux/random.h>
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#include <linux/sort.h>
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#include "super.h"
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#include "mds_client.h"
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#include "cache.h"
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#include <linux/ceph/decode.h>
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/*
 * Ceph inode operations
 *
 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
 * setattr, etc.), xattr helpers, and helpers for assimilating
 * metadata returned by the MDS into our cache.
 *
 * Also define helpers for doing asynchronous writeback, invalidation,
 * and truncation for the benefit of those who can't afford to block
 * (typically because they are in the message handler path).
 */

static const struct inode_operations ceph_symlink_iops;

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static void ceph_invalidate_work(struct work_struct *work);
static void ceph_writeback_work(struct work_struct *work);
static void ceph_vmtruncate_work(struct work_struct *work);
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/*
 * find or create an inode, given the ceph ino number
 */
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static int ceph_set_ino_cb(struct inode *inode, void *data)
{
	ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
	inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
	return 0;
}

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struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
{
	struct inode *inode;
	ino_t t = ceph_vino_to_ino(vino);

	inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino);
	if (inode == NULL)
		return ERR_PTR(-ENOMEM);
	if (inode->i_state & I_NEW) {
		dout("get_inode created new inode %p %llx.%llx ino %llx\n",
		     inode, ceph_vinop(inode), (u64)inode->i_ino);
		unlock_new_inode(inode);
	}

	dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino,
	     vino.snap, inode);
	return inode;
}

/*
 * get/constuct snapdir inode for a given directory
 */
struct inode *ceph_get_snapdir(struct inode *parent)
{
	struct ceph_vino vino = {
		.ino = ceph_ino(parent),
		.snap = CEPH_SNAPDIR,
	};
	struct inode *inode = ceph_get_inode(parent->i_sb, vino);
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	struct ceph_inode_info *ci = ceph_inode(inode);
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	BUG_ON(!S_ISDIR(parent->i_mode));
	if (IS_ERR(inode))
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		return inode;
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	inode->i_mode = parent->i_mode;
	inode->i_uid = parent->i_uid;
	inode->i_gid = parent->i_gid;
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	inode->i_op = &ceph_snapdir_iops;
	inode->i_fop = &ceph_snapdir_fops;
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	ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */
	ci->i_rbytes = 0;
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	return inode;
}

const struct inode_operations ceph_file_iops = {
	.permission = ceph_permission,
	.setattr = ceph_setattr,
	.getattr = ceph_getattr,
	.listxattr = ceph_listxattr,
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	.get_acl = ceph_get_acl,
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	.set_acl = ceph_set_acl,
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};


/*
 * We use a 'frag tree' to keep track of the MDS's directory fragments
 * for a given inode (usually there is just a single fragment).  We
 * need to know when a child frag is delegated to a new MDS, or when
 * it is flagged as replicated, so we can direct our requests
 * accordingly.
 */

/*
 * find/create a frag in the tree
 */
static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci,
						    u32 f)
{
	struct rb_node **p;
	struct rb_node *parent = NULL;
	struct ceph_inode_frag *frag;
	int c;

	p = &ci->i_fragtree.rb_node;
	while (*p) {
		parent = *p;
		frag = rb_entry(parent, struct ceph_inode_frag, node);
		c = ceph_frag_compare(f, frag->frag);
		if (c < 0)
			p = &(*p)->rb_left;
		else if (c > 0)
			p = &(*p)->rb_right;
		else
			return frag;
	}

	frag = kmalloc(sizeof(*frag), GFP_NOFS);
	if (!frag) {
		pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx "
		       "frag %x\n", &ci->vfs_inode,
		       ceph_vinop(&ci->vfs_inode), f);
		return ERR_PTR(-ENOMEM);
	}
	frag->frag = f;
	frag->split_by = 0;
	frag->mds = -1;
	frag->ndist = 0;

	rb_link_node(&frag->node, parent, p);
	rb_insert_color(&frag->node, &ci->i_fragtree);

	dout("get_or_create_frag added %llx.%llx frag %x\n",
	     ceph_vinop(&ci->vfs_inode), f);
	return frag;
}

/*
 * find a specific frag @f
 */
struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f)
{
	struct rb_node *n = ci->i_fragtree.rb_node;

	while (n) {
		struct ceph_inode_frag *frag =
			rb_entry(n, struct ceph_inode_frag, node);
		int c = ceph_frag_compare(f, frag->frag);
		if (c < 0)
			n = n->rb_left;
		else if (c > 0)
			n = n->rb_right;
		else
			return frag;
	}
	return NULL;
}

/*
 * Choose frag containing the given value @v.  If @pfrag is
 * specified, copy the frag delegation info to the caller if
 * it is present.
 */
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static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
			      struct ceph_inode_frag *pfrag, int *found)
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{
	u32 t = ceph_frag_make(0, 0);
	struct ceph_inode_frag *frag;
	unsigned nway, i;
	u32 n;

	if (found)
		*found = 0;

	while (1) {
		WARN_ON(!ceph_frag_contains_value(t, v));
		frag = __ceph_find_frag(ci, t);
		if (!frag)
			break; /* t is a leaf */
		if (frag->split_by == 0) {
			if (pfrag)
				memcpy(pfrag, frag, sizeof(*pfrag));
			if (found)
				*found = 1;
			break;
		}

		/* choose child */
		nway = 1 << frag->split_by;
		dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t,
		     frag->split_by, nway);
		for (i = 0; i < nway; i++) {
			n = ceph_frag_make_child(t, frag->split_by, i);
			if (ceph_frag_contains_value(n, v)) {
				t = n;
				break;
			}
		}
		BUG_ON(i == nway);
	}
	dout("choose_frag(%x) = %x\n", v, t);

	return t;
}

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u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
		     struct ceph_inode_frag *pfrag, int *found)
{
	u32 ret;
	mutex_lock(&ci->i_fragtree_mutex);
	ret = __ceph_choose_frag(ci, v, pfrag, found);
	mutex_unlock(&ci->i_fragtree_mutex);
	return ret;
}

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/*
 * Process dirfrag (delegation) info from the mds.  Include leaf
 * fragment in tree ONLY if ndist > 0.  Otherwise, only
 * branches/splits are included in i_fragtree)
 */
static int ceph_fill_dirfrag(struct inode *inode,
			     struct ceph_mds_reply_dirfrag *dirinfo)
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	struct ceph_inode_frag *frag;
	u32 id = le32_to_cpu(dirinfo->frag);
	int mds = le32_to_cpu(dirinfo->auth);
	int ndist = le32_to_cpu(dirinfo->ndist);
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	int diri_auth = -1;
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	int i;
	int err = 0;

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	spin_lock(&ci->i_ceph_lock);
	if (ci->i_auth_cap)
		diri_auth = ci->i_auth_cap->mds;
	spin_unlock(&ci->i_ceph_lock);

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	if (mds == -1) /* CDIR_AUTH_PARENT */
		mds = diri_auth;

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	mutex_lock(&ci->i_fragtree_mutex);
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	if (ndist == 0 && mds == diri_auth) {
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		/* no delegation info needed. */
		frag = __ceph_find_frag(ci, id);
		if (!frag)
			goto out;
		if (frag->split_by == 0) {
			/* tree leaf, remove */
			dout("fill_dirfrag removed %llx.%llx frag %x"
			     " (no ref)\n", ceph_vinop(inode), id);
			rb_erase(&frag->node, &ci->i_fragtree);
			kfree(frag);
		} else {
			/* tree branch, keep and clear */
			dout("fill_dirfrag cleared %llx.%llx frag %x"
			     " referral\n", ceph_vinop(inode), id);
			frag->mds = -1;
			frag->ndist = 0;
		}
		goto out;
	}


	/* find/add this frag to store mds delegation info */
	frag = __get_or_create_frag(ci, id);
	if (IS_ERR(frag)) {
		/* this is not the end of the world; we can continue
		   with bad/inaccurate delegation info */
		pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
		       ceph_vinop(inode), le32_to_cpu(dirinfo->frag));
		err = -ENOMEM;
		goto out;
	}

	frag->mds = mds;
	frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP);
	for (i = 0; i < frag->ndist; i++)
		frag->dist[i] = le32_to_cpu(dirinfo->dist[i]);
	dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
	     ceph_vinop(inode), frag->frag, frag->ndist);

out:
	mutex_unlock(&ci->i_fragtree_mutex);
	return err;
}

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static int frag_tree_split_cmp(const void *l, const void *r)
{
	struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l;
	struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r;
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	return ceph_frag_compare(le32_to_cpu(ls->frag),
				 le32_to_cpu(rs->frag));
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}

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static bool is_frag_child(u32 f, struct ceph_inode_frag *frag)
{
	if (!frag)
		return f == ceph_frag_make(0, 0);
	if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by)
		return false;
	return ceph_frag_contains_value(frag->frag, ceph_frag_value(f));
}

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static int ceph_fill_fragtree(struct inode *inode,
			      struct ceph_frag_tree_head *fragtree,
			      struct ceph_mds_reply_dirfrag *dirinfo)
{
	struct ceph_inode_info *ci = ceph_inode(inode);
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	struct ceph_inode_frag *frag, *prev_frag = NULL;
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	struct rb_node *rb_node;
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	unsigned i, split_by, nsplits;
	u32 id;
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	bool update = false;

	mutex_lock(&ci->i_fragtree_mutex);
	nsplits = le32_to_cpu(fragtree->nsplits);
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	if (nsplits != ci->i_fragtree_nsplits) {
		update = true;
	} else if (nsplits) {
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		i = prandom_u32() % nsplits;
		id = le32_to_cpu(fragtree->splits[i].frag);
		if (!__ceph_find_frag(ci, id))
			update = true;
	} else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) {
		rb_node = rb_first(&ci->i_fragtree);
		frag = rb_entry(rb_node, struct ceph_inode_frag, node);
		if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node))
			update = true;
	}
	if (!update && dirinfo) {
		id = le32_to_cpu(dirinfo->frag);
		if (id != __ceph_choose_frag(ci, id, NULL, NULL))
			update = true;
	}
	if (!update)
		goto out_unlock;

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	if (nsplits > 1) {
		sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]),
		     frag_tree_split_cmp, NULL);
	}

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	dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode));
	rb_node = rb_first(&ci->i_fragtree);
	for (i = 0; i < nsplits; i++) {
		id = le32_to_cpu(fragtree->splits[i].frag);
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		split_by = le32_to_cpu(fragtree->splits[i].by);
		if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) {
			pr_err("fill_fragtree %llx.%llx invalid split %d/%u, "
			       "frag %x split by %d\n", ceph_vinop(inode),
			       i, nsplits, id, split_by);
			continue;
		}
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		frag = NULL;
		while (rb_node) {
			frag = rb_entry(rb_node, struct ceph_inode_frag, node);
			if (ceph_frag_compare(frag->frag, id) >= 0) {
				if (frag->frag != id)
					frag = NULL;
				else
					rb_node = rb_next(rb_node);
				break;
			}
			rb_node = rb_next(rb_node);
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			/* delete stale split/leaf node */
			if (frag->split_by > 0 ||
			    !is_frag_child(frag->frag, prev_frag)) {
				rb_erase(&frag->node, &ci->i_fragtree);
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				if (frag->split_by > 0)
					ci->i_fragtree_nsplits--;
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				kfree(frag);
			}
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			frag = NULL;
		}
		if (!frag) {
			frag = __get_or_create_frag(ci, id);
			if (IS_ERR(frag))
				continue;
		}
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		if (frag->split_by == 0)
			ci->i_fragtree_nsplits++;
		frag->split_by = split_by;
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		dout(" frag %x split by %d\n", frag->frag, frag->split_by);
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		prev_frag = frag;
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	}
	while (rb_node) {
		frag = rb_entry(rb_node, struct ceph_inode_frag, node);
		rb_node = rb_next(rb_node);
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		/* delete stale split/leaf node */
		if (frag->split_by > 0 ||
		    !is_frag_child(frag->frag, prev_frag)) {
			rb_erase(&frag->node, &ci->i_fragtree);
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			if (frag->split_by > 0)
				ci->i_fragtree_nsplits--;
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			kfree(frag);
		}
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	}
out_unlock:
	mutex_unlock(&ci->i_fragtree_mutex);
	return 0;
}
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/*
 * initialize a newly allocated inode.
 */
struct inode *ceph_alloc_inode(struct super_block *sb)
{
	struct ceph_inode_info *ci;
	int i;

	ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS);
	if (!ci)
		return NULL;

	dout("alloc_inode %p\n", &ci->vfs_inode);

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	spin_lock_init(&ci->i_ceph_lock);

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	ci->i_version = 0;
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	ci->i_inline_version = 0;
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	ci->i_time_warp_seq = 0;
	ci->i_ceph_flags = 0;
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	atomic64_set(&ci->i_ordered_count, 1);
	atomic64_set(&ci->i_release_count, 1);
	atomic64_set(&ci->i_complete_seq[0], 0);
	atomic64_set(&ci->i_complete_seq[1], 0);
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	ci->i_symlink = NULL;

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	memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
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	RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL);
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	ci->i_fragtree = RB_ROOT;
	mutex_init(&ci->i_fragtree_mutex);

	ci->i_xattrs.blob = NULL;
	ci->i_xattrs.prealloc_blob = NULL;
	ci->i_xattrs.dirty = false;
	ci->i_xattrs.index = RB_ROOT;
	ci->i_xattrs.count = 0;
	ci->i_xattrs.names_size = 0;
	ci->i_xattrs.vals_size = 0;
	ci->i_xattrs.version = 0;
	ci->i_xattrs.index_version = 0;

	ci->i_caps = RB_ROOT;
	ci->i_auth_cap = NULL;
	ci->i_dirty_caps = 0;
	ci->i_flushing_caps = 0;
	INIT_LIST_HEAD(&ci->i_dirty_item);
	INIT_LIST_HEAD(&ci->i_flushing_item);
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	ci->i_prealloc_cap_flush = NULL;
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	INIT_LIST_HEAD(&ci->i_cap_flush_list);
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	init_waitqueue_head(&ci->i_cap_wq);
	ci->i_hold_caps_min = 0;
	ci->i_hold_caps_max = 0;
	INIT_LIST_HEAD(&ci->i_cap_delay_list);
	INIT_LIST_HEAD(&ci->i_cap_snaps);
	ci->i_head_snapc = NULL;
	ci->i_snap_caps = 0;

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	for (i = 0; i < CEPH_FILE_MODE_BITS; i++)
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		ci->i_nr_by_mode[i] = 0;

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	mutex_init(&ci->i_truncate_mutex);
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	ci->i_truncate_seq = 0;
	ci->i_truncate_size = 0;
	ci->i_truncate_pending = 0;

	ci->i_max_size = 0;
	ci->i_reported_size = 0;
	ci->i_wanted_max_size = 0;
	ci->i_requested_max_size = 0;

	ci->i_pin_ref = 0;
	ci->i_rd_ref = 0;
	ci->i_rdcache_ref = 0;
	ci->i_wr_ref = 0;
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	ci->i_wb_ref = 0;
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	ci->i_wrbuffer_ref = 0;
	ci->i_wrbuffer_ref_head = 0;
	ci->i_shared_gen = 0;
	ci->i_rdcache_gen = 0;
	ci->i_rdcache_revoking = 0;

	INIT_LIST_HEAD(&ci->i_unsafe_writes);
	INIT_LIST_HEAD(&ci->i_unsafe_dirops);
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	INIT_LIST_HEAD(&ci->i_unsafe_iops);
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	spin_lock_init(&ci->i_unsafe_lock);

	ci->i_snap_realm = NULL;
	INIT_LIST_HEAD(&ci->i_snap_realm_item);
	INIT_LIST_HEAD(&ci->i_snap_flush_item);

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	INIT_WORK(&ci->i_wb_work, ceph_writeback_work);
	INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work);
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	INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work);

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	ceph_fscache_inode_init(ci);

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	return &ci->vfs_inode;
}

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static void ceph_i_callback(struct rcu_head *head)
{
	struct inode *inode = container_of(head, struct inode, i_rcu);
	struct ceph_inode_info *ci = ceph_inode(inode);

	kmem_cache_free(ceph_inode_cachep, ci);
}

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void ceph_destroy_inode(struct inode *inode)
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	struct ceph_inode_frag *frag;
	struct rb_node *n;

	dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));

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	ceph_fscache_unregister_inode_cookie(ci);

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	ceph_queue_caps_release(inode);

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	/*
	 * we may still have a snap_realm reference if there are stray
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	 * caps in i_snap_caps.
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	 */
	if (ci->i_snap_realm) {
		struct ceph_mds_client *mdsc =
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			ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc;
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		struct ceph_snap_realm *realm = ci->i_snap_realm;

		dout(" dropping residual ref to snap realm %p\n", realm);
		spin_lock(&realm->inodes_with_caps_lock);
		list_del_init(&ci->i_snap_realm_item);
		spin_unlock(&realm->inodes_with_caps_lock);
		ceph_put_snap_realm(mdsc, realm);
	}

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	kfree(ci->i_symlink);
	while ((n = rb_first(&ci->i_fragtree)) != NULL) {
		frag = rb_entry(n, struct ceph_inode_frag, node);
		rb_erase(n, &ci->i_fragtree);
		kfree(frag);
	}
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	ci->i_fragtree_nsplits = 0;
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	__ceph_destroy_xattrs(ci);
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	if (ci->i_xattrs.blob)
		ceph_buffer_put(ci->i_xattrs.blob);
	if (ci->i_xattrs.prealloc_blob)
		ceph_buffer_put(ci->i_xattrs.prealloc_blob);
S
Sage Weil 已提交
570

Y
Yan, Zheng 已提交
571
	ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns));
572

N
Nick Piggin 已提交
573
	call_rcu(&inode->i_rcu, ceph_i_callback);
S
Sage Weil 已提交
574 575
}

Y
Yan, Zheng 已提交
576 577 578 579 580 581 582 583 584 585
int ceph_drop_inode(struct inode *inode)
{
	/*
	 * Positve dentry and corresponding inode are always accompanied
	 * in MDS reply. So no need to keep inode in the cache after
	 * dropping all its aliases.
	 */
	return 1;
}

586 587 588 589 590 591 592 593
void ceph_evict_inode(struct inode *inode)
{
	/* wait unsafe sync writes */
	ceph_sync_write_wait(inode);
	truncate_inode_pages_final(&inode->i_data);
	clear_inode(inode);
}

594 595 596 597 598
static inline blkcnt_t calc_inode_blocks(u64 size)
{
	return (size + (1<<9) - 1) >> 9;
}

S
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/*
 * Helpers to fill in size, ctime, mtime, and atime.  We have to be
 * careful because either the client or MDS may have more up to date
 * info, depending on which capabilities are held, and whether
 * time_warp_seq or truncate_seq have increased.  (Ordinarily, mtime
 * and size are monotonically increasing, except when utimes() or
 * truncate() increments the corresponding _seq values.)
 */
int ceph_fill_file_size(struct inode *inode, int issued,
			u32 truncate_seq, u64 truncate_size, u64 size)
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	int queue_trunc = 0;

	if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
	    (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
		dout("size %lld -> %llu\n", inode->i_size, size);
616 617 618 619
		if (size > 0 && S_ISDIR(inode->i_mode)) {
			pr_err("fill_file_size non-zero size for directory\n");
			size = 0;
		}
620
		i_size_write(inode, size);
621
		inode->i_blocks = calc_inode_blocks(size);
S
Sage Weil 已提交
622 623 624 625 626
		ci->i_reported_size = size;
		if (truncate_seq != ci->i_truncate_seq) {
			dout("truncate_seq %u -> %u\n",
			     ci->i_truncate_seq, truncate_seq);
			ci->i_truncate_seq = truncate_seq;
Y
Yan, Zheng 已提交
627 628 629 630 631 632

			/* the MDS should have revoked these caps */
			WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL |
					       CEPH_CAP_FILE_RD |
					       CEPH_CAP_FILE_WR |
					       CEPH_CAP_FILE_LAZYIO));
633 634 635 636 637 638
			/*
			 * If we hold relevant caps, or in the case where we're
			 * not the only client referencing this file and we
			 * don't hold those caps, then we need to check whether
			 * the file is either opened or mmaped
			 */
Y
Yan, Zheng 已提交
639 640
			if ((issued & (CEPH_CAP_FILE_CACHE|
				       CEPH_CAP_FILE_BUFFER)) ||
641 642
			    mapping_mapped(inode->i_mapping) ||
			    __ceph_caps_file_wanted(ci)) {
S
Sage Weil 已提交
643 644 645 646 647 648 649 650 651 652 653
				ci->i_truncate_pending++;
				queue_trunc = 1;
			}
		}
	}
	if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
	    ci->i_truncate_size != truncate_size) {
		dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
		     truncate_size);
		ci->i_truncate_size = truncate_size;
	}
654 655 656 657

	if (queue_trunc)
		ceph_fscache_invalidate(inode);

S
Sage Weil 已提交
658 659 660 661 662 663 664 665 666 667 668 669
	return queue_trunc;
}

void ceph_fill_file_time(struct inode *inode, int issued,
			 u64 time_warp_seq, struct timespec *ctime,
			 struct timespec *mtime, struct timespec *atime)
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	int warn = 0;

	if (issued & (CEPH_CAP_FILE_EXCL|
		      CEPH_CAP_FILE_WR|
S
Sage Weil 已提交
670 671 672
		      CEPH_CAP_FILE_BUFFER|
		      CEPH_CAP_AUTH_EXCL|
		      CEPH_CAP_XATTR_EXCL)) {
S
Sage Weil 已提交
673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711
		if (timespec_compare(ctime, &inode->i_ctime) > 0) {
			dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
			     inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
			     ctime->tv_sec, ctime->tv_nsec);
			inode->i_ctime = *ctime;
		}
		if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
			/* the MDS did a utimes() */
			dout("mtime %ld.%09ld -> %ld.%09ld "
			     "tw %d -> %d\n",
			     inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
			     mtime->tv_sec, mtime->tv_nsec,
			     ci->i_time_warp_seq, (int)time_warp_seq);

			inode->i_mtime = *mtime;
			inode->i_atime = *atime;
			ci->i_time_warp_seq = time_warp_seq;
		} else if (time_warp_seq == ci->i_time_warp_seq) {
			/* nobody did utimes(); take the max */
			if (timespec_compare(mtime, &inode->i_mtime) > 0) {
				dout("mtime %ld.%09ld -> %ld.%09ld inc\n",
				     inode->i_mtime.tv_sec,
				     inode->i_mtime.tv_nsec,
				     mtime->tv_sec, mtime->tv_nsec);
				inode->i_mtime = *mtime;
			}
			if (timespec_compare(atime, &inode->i_atime) > 0) {
				dout("atime %ld.%09ld -> %ld.%09ld inc\n",
				     inode->i_atime.tv_sec,
				     inode->i_atime.tv_nsec,
				     atime->tv_sec, atime->tv_nsec);
				inode->i_atime = *atime;
			}
		} else if (issued & CEPH_CAP_FILE_EXCL) {
			/* we did a utimes(); ignore mds values */
		} else {
			warn = 1;
		}
	} else {
S
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712
		/* we have no write|excl caps; whatever the MDS says is true */
S
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713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730
		if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
			inode->i_ctime = *ctime;
			inode->i_mtime = *mtime;
			inode->i_atime = *atime;
			ci->i_time_warp_seq = time_warp_seq;
		} else {
			warn = 1;
		}
	}
	if (warn) /* time_warp_seq shouldn't go backwards */
		dout("%p mds time_warp_seq %llu < %u\n",
		     inode, time_warp_seq, ci->i_time_warp_seq);
}

/*
 * Populate an inode based on info from mds.  May be called on new or
 * existing inodes.
 */
731
static int fill_inode(struct inode *inode, struct page *locked_page,
S
Sage Weil 已提交
732 733 734 735 736 737
		      struct ceph_mds_reply_info_in *iinfo,
		      struct ceph_mds_reply_dirfrag *dirinfo,
		      struct ceph_mds_session *session,
		      unsigned long ttl_from, int cap_fmode,
		      struct ceph_cap_reservation *caps_reservation)
{
738
	struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
S
Sage Weil 已提交
739 740
	struct ceph_mds_reply_inode *info = iinfo->in;
	struct ceph_inode_info *ci = ceph_inode(inode);
741
	int issued = 0, implemented, new_issued;
S
Sage Weil 已提交
742 743
	struct timespec mtime, atime, ctime;
	struct ceph_buffer *xattr_blob = NULL;
Y
Yan, Zheng 已提交
744
	struct ceph_string *pool_ns = NULL;
745
	struct ceph_cap *new_cap = NULL;
S
Sage Weil 已提交
746
	int err = 0;
747
	bool wake = false;
748 749
	bool queue_trunc = false;
	bool new_version = false;
Y
Yan, Zheng 已提交
750
	bool fill_inline = false;
S
Sage Weil 已提交
751 752 753 754 755

	dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
	     inode, ceph_vinop(inode), le64_to_cpu(info->version),
	     ci->i_version);

756 757 758 759
	/* prealloc new cap struct */
	if (info->cap.caps && ceph_snap(inode) == CEPH_NOSNAP)
		new_cap = ceph_get_cap(mdsc, caps_reservation);

S
Sage Weil 已提交
760 761 762 763 764 765
	/*
	 * prealloc xattr data, if it looks like we'll need it.  only
	 * if len > 4 (meaning there are actually xattrs; the first 4
	 * bytes are the xattr count).
	 */
	if (iinfo->xattr_len > 4) {
S
Sage Weil 已提交
766
		xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
S
Sage Weil 已提交
767 768 769 770 771
		if (!xattr_blob)
			pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
			       iinfo->xattr_len);
	}

Y
Yan, Zheng 已提交
772 773 774 775
	if (iinfo->pool_ns_len > 0)
		pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data,
						     iinfo->pool_ns_len);

776
	spin_lock(&ci->i_ceph_lock);
S
Sage Weil 已提交
777 778 779

	/*
	 * provided version will be odd if inode value is projected,
780 781 782 783 784 785 786 787
	 * even if stable.  skip the update if we have newer stable
	 * info (ours>=theirs, e.g. due to racing mds replies), unless
	 * we are getting projected (unstable) info (in which case the
	 * version is odd, and we want ours>theirs).
	 *   us   them
	 *   2    2     skip
	 *   3    2     skip
	 *   3    3     update
S
Sage Weil 已提交
788
	 */
789 790 791 792 793
	if (ci->i_version == 0 ||
	    ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
	     le64_to_cpu(info->version) > (ci->i_version & ~1)))
		new_version = true;

S
Sage Weil 已提交
794 795
	issued = __ceph_caps_issued(ci, &implemented);
	issued |= implemented | __ceph_caps_dirty(ci);
796
	new_issued = ~issued & le32_to_cpu(info->cap.caps);
S
Sage Weil 已提交
797 798 799 800 801

	/* update inode */
	ci->i_version = le64_to_cpu(info->version);
	inode->i_version++;
	inode->i_rdev = le32_to_cpu(info->rdev);
802
	inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
S
Sage Weil 已提交
803

804 805
	if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
	    (issued & CEPH_CAP_AUTH_EXCL) == 0) {
S
Sage Weil 已提交
806
		inode->i_mode = le32_to_cpu(info->mode);
807 808
		inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
		inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
S
Sage Weil 已提交
809
		dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
810 811
		     from_kuid(&init_user_ns, inode->i_uid),
		     from_kgid(&init_user_ns, inode->i_gid));
S
Sage Weil 已提交
812 813
	}

814 815
	if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
	    (issued & CEPH_CAP_LINK_EXCL) == 0)
M
Miklos Szeredi 已提交
816
		set_nlink(inode, le32_to_cpu(info->nlink));
S
Sage Weil 已提交
817

818 819 820 821 822 823 824 825 826 827 828 829
	if (new_version || (new_issued & CEPH_CAP_ANY_RD)) {
		/* be careful with mtime, atime, size */
		ceph_decode_timespec(&atime, &info->atime);
		ceph_decode_timespec(&mtime, &info->mtime);
		ceph_decode_timespec(&ctime, &info->ctime);
		ceph_fill_file_time(inode, issued,
				le32_to_cpu(info->time_warp_seq),
				&ctime, &mtime, &atime);
	}

	if (new_version ||
	    (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) {
830
		s64 old_pool = ci->i_layout.pool_id;
Y
Yan, Zheng 已提交
831 832
		struct ceph_string *old_ns;

833
		ceph_file_layout_from_legacy(&ci->i_layout, &info->layout);
Y
Yan, Zheng 已提交
834 835 836 837 838
		old_ns = rcu_dereference_protected(ci->i_layout.pool_ns,
					lockdep_is_held(&ci->i_ceph_lock));
		rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns);

		if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns)
839 840
			ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;

Y
Yan, Zheng 已提交
841
		pool_ns = old_ns;
842

843 844 845 846 847 848 849 850 851 852 853 854
		queue_trunc = ceph_fill_file_size(inode, issued,
					le32_to_cpu(info->truncate_seq),
					le64_to_cpu(info->truncate_size),
					le64_to_cpu(info->size));
		/* only update max_size on auth cap */
		if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
		    ci->i_max_size != le64_to_cpu(info->max_size)) {
			dout("max_size %lld -> %llu\n", ci->i_max_size,
					le64_to_cpu(info->max_size));
			ci->i_max_size = le64_to_cpu(info->max_size);
		}
	}
S
Sage Weil 已提交
855 856 857

	/* xattrs */
	/* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
858
	if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL))  &&
S
Sage Weil 已提交
859 860 861 862 863 864 865 866
	    le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
		if (ci->i_xattrs.blob)
			ceph_buffer_put(ci->i_xattrs.blob);
		ci->i_xattrs.blob = xattr_blob;
		if (xattr_blob)
			memcpy(ci->i_xattrs.blob->vec.iov_base,
			       iinfo->xattr_data, iinfo->xattr_len);
		ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
G
Guangliang Zhao 已提交
867
		ceph_forget_all_cached_acls(inode);
868
		xattr_blob = NULL;
S
Sage Weil 已提交
869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887
	}

	inode->i_mapping->a_ops = &ceph_aops;

	switch (inode->i_mode & S_IFMT) {
	case S_IFIFO:
	case S_IFBLK:
	case S_IFCHR:
	case S_IFSOCK:
		init_special_inode(inode, inode->i_mode, inode->i_rdev);
		inode->i_op = &ceph_file_iops;
		break;
	case S_IFREG:
		inode->i_op = &ceph_file_iops;
		inode->i_fop = &ceph_file_fops;
		break;
	case S_IFLNK:
		inode->i_op = &ceph_symlink_iops;
		if (!ci->i_symlink) {
888
			u32 symlen = iinfo->symlink_len;
S
Sage Weil 已提交
889 890
			char *sym;

891
			spin_unlock(&ci->i_ceph_lock);
S
Sage Weil 已提交
892

893 894 895 896 897 898 899
			if (symlen != i_size_read(inode)) {
				pr_err("fill_inode %llx.%llx BAD symlink "
					"size %lld\n", ceph_vinop(inode),
					i_size_read(inode));
				i_size_write(inode, symlen);
				inode->i_blocks = calc_inode_blocks(symlen);
			}
900

S
Sage Weil 已提交
901
			err = -ENOMEM;
902
			sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
S
Sage Weil 已提交
903 904 905
			if (!sym)
				goto out;

906
			spin_lock(&ci->i_ceph_lock);
S
Sage Weil 已提交
907 908 909 910 911
			if (!ci->i_symlink)
				ci->i_symlink = sym;
			else
				kfree(sym); /* lost a race */
		}
A
Al Viro 已提交
912
		inode->i_link = ci->i_symlink;
S
Sage Weil 已提交
913 914 915 916 917
		break;
	case S_IFDIR:
		inode->i_op = &ceph_dir_iops;
		inode->i_fop = &ceph_dir_fops;

918 919
		ci->i_dir_layout = iinfo->dir_layout;

S
Sage Weil 已提交
920 921 922 923 924 925 926 927 928 929 930 931 932 933 934
		ci->i_files = le64_to_cpu(info->files);
		ci->i_subdirs = le64_to_cpu(info->subdirs);
		ci->i_rbytes = le64_to_cpu(info->rbytes);
		ci->i_rfiles = le64_to_cpu(info->rfiles);
		ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
		ceph_decode_timespec(&ci->i_rctime, &info->rctime);
		break;
	default:
		pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
		       ceph_vinop(inode), inode->i_mode);
	}

	/* were we issued a capability? */
	if (info->cap.caps) {
		if (ceph_snap(inode) == CEPH_NOSNAP) {
935
			unsigned caps = le32_to_cpu(info->cap.caps);
S
Sage Weil 已提交
936 937
			ceph_add_cap(inode, session,
				     le64_to_cpu(info->cap.cap_id),
938
				     cap_fmode, caps,
S
Sage Weil 已提交
939 940 941 942
				     le32_to_cpu(info->cap.wanted),
				     le32_to_cpu(info->cap.seq),
				     le32_to_cpu(info->cap.mseq),
				     le64_to_cpu(info->cap.realm),
943
				     info->cap.flags, &new_cap);
944 945 946 947 948 949 950 951

			/* set dir completion flag? */
			if (S_ISDIR(inode->i_mode) &&
			    ci->i_files == 0 && ci->i_subdirs == 0 &&
			    (caps & CEPH_CAP_FILE_SHARED) &&
			    (issued & CEPH_CAP_FILE_EXCL) == 0 &&
			    !__ceph_dir_is_complete(ci)) {
				dout(" marking %p complete (empty)\n", inode);
Y
Yan, Zheng 已提交
952
				i_size_write(inode, 0);
953
				__ceph_dir_set_complete(ci,
Y
Yan, Zheng 已提交
954 955
					atomic64_read(&ci->i_release_count),
					atomic64_read(&ci->i_ordered_count));
956 957
			}

958
			wake = true;
S
Sage Weil 已提交
959 960 961 962 963 964 965
		} else {
			dout(" %p got snap_caps %s\n", inode,
			     ceph_cap_string(le32_to_cpu(info->cap.caps)));
			ci->i_snap_caps |= le32_to_cpu(info->cap.caps);
			if (cap_fmode >= 0)
				__ceph_get_fmode(ci, cap_fmode);
		}
966
	} else if (cap_fmode >= 0) {
967
		pr_warn("mds issued no caps on %llx.%llx\n",
968 969
			   ceph_vinop(inode));
		__ceph_get_fmode(ci, cap_fmode);
S
Sage Weil 已提交
970
	}
Y
Yan, Zheng 已提交
971 972 973 974 975 976

	if (iinfo->inline_version > 0 &&
	    iinfo->inline_version >= ci->i_inline_version) {
		int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
		ci->i_inline_version = iinfo->inline_version;
		if (ci->i_inline_version != CEPH_INLINE_NONE &&
977 978
		    (locked_page ||
		     (le32_to_cpu(info->cap.caps) & cache_caps)))
Y
Yan, Zheng 已提交
979 980 981
			fill_inline = true;
	}

982
	spin_unlock(&ci->i_ceph_lock);
S
Sage Weil 已提交
983

Y
Yan, Zheng 已提交
984
	if (fill_inline)
985
		ceph_fill_inline_data(inode, locked_page,
Y
Yan, Zheng 已提交
986 987
				      iinfo->inline_data, iinfo->inline_len);

988 989 990
	if (wake)
		wake_up_all(&ci->i_cap_wq);

S
Sage Weil 已提交
991 992
	/* queue truncate if we saw i_size decrease */
	if (queue_trunc)
993
		ceph_queue_vmtruncate(inode);
S
Sage Weil 已提交
994 995

	/* populate frag tree */
996 997
	if (S_ISDIR(inode->i_mode))
		ceph_fill_fragtree(inode, &info->fragtree, dirinfo);
S
Sage Weil 已提交
998 999 1000 1001 1002 1003 1004

	/* update delegation info? */
	if (dirinfo)
		ceph_fill_dirfrag(inode, dirinfo);

	err = 0;
out:
1005 1006
	if (new_cap)
		ceph_put_cap(mdsc, new_cap);
S
Sage Weil 已提交
1007 1008
	if (xattr_blob)
		ceph_buffer_put(xattr_blob);
Y
Yan, Zheng 已提交
1009
	ceph_put_string(pool_ns);
S
Sage Weil 已提交
1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027
	return err;
}

/*
 * caller should hold session s_mutex.
 */
static void update_dentry_lease(struct dentry *dentry,
				struct ceph_mds_reply_lease *lease,
				struct ceph_mds_session *session,
				unsigned long from_time)
{
	struct ceph_dentry_info *di = ceph_dentry(dentry);
	long unsigned duration = le32_to_cpu(lease->duration_ms);
	long unsigned ttl = from_time + (duration * HZ) / 1000;
	long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
	struct inode *dir;

	spin_lock(&dentry->d_lock);
S
Sage Weil 已提交
1028 1029
	dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
	     dentry, duration, ttl);
S
Sage Weil 已提交
1030 1031

	/* make lease_rdcache_gen match directory */
1032
	dir = d_inode(dentry->d_parent);
A
Al Viro 已提交
1033 1034 1035 1036 1037

	/* only track leases on regular dentries */
	if (ceph_snap(dir) != CEPH_NOSNAP)
		goto out_unlock;

S
Sage Weil 已提交
1038 1039
	di->lease_shared_gen = ceph_inode(dir)->i_shared_gen;

S
Sage Weil 已提交
1040
	if (duration == 0)
S
Sage Weil 已提交
1041 1042 1043
		goto out_unlock;

	if (di->lease_gen == session->s_cap_gen &&
M
Miklos Szeredi 已提交
1044
	    time_before(ttl, di->time))
S
Sage Weil 已提交
1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057
		goto out_unlock;  /* we already have a newer lease. */

	if (di->lease_session && di->lease_session != session)
		goto out_unlock;

	ceph_dentry_lru_touch(dentry);

	if (!di->lease_session)
		di->lease_session = ceph_get_mds_session(session);
	di->lease_gen = session->s_cap_gen;
	di->lease_seq = le32_to_cpu(lease->seq);
	di->lease_renew_after = half_ttl;
	di->lease_renew_from = 0;
M
Miklos Szeredi 已提交
1058
	di->time = ttl;
S
Sage Weil 已提交
1059 1060 1061 1062 1063 1064 1065 1066 1067
out_unlock:
	spin_unlock(&dentry->d_lock);
	return;
}

/*
 * splice a dentry to an inode.
 * caller must hold directory i_mutex for this to be safe.
 */
1068
static struct dentry *splice_dentry(struct dentry *dn, struct inode *in)
S
Sage Weil 已提交
1069 1070 1071
{
	struct dentry *realdn;

1072
	BUG_ON(d_inode(dn));
S
Sage Weil 已提交
1073

S
Sage Weil 已提交
1074 1075 1076
	/* dn must be unhashed */
	if (!d_unhashed(dn))
		d_drop(dn);
1077
	realdn = d_splice_alias(in, dn);
S
Sage Weil 已提交
1078
	if (IS_ERR(realdn)) {
1079 1080
		pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
		       PTR_ERR(realdn), dn, in, ceph_vinop(in));
S
Sage Weil 已提交
1081 1082 1083 1084 1085
		dn = realdn; /* note realdn contains the error */
		goto out;
	} else if (realdn) {
		dout("dn %p (%d) spliced with %p (%d) "
		     "inode %p ino %llx.%llx\n",
A
Al Viro 已提交
1086 1087
		     dn, d_count(dn),
		     realdn, d_count(realdn),
1088
		     d_inode(realdn), ceph_vinop(d_inode(realdn)));
S
Sage Weil 已提交
1089 1090 1091 1092 1093
		dput(dn);
		dn = realdn;
	} else {
		BUG_ON(!ceph_dentry(dn));
		dout("dn %p attached to %p ino %llx.%llx\n",
1094
		     dn, d_inode(dn), ceph_vinop(d_inode(dn)));
S
Sage Weil 已提交
1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116
	}
out:
	return dn;
}

/*
 * Incorporate results into the local cache.  This is either just
 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
 * after a lookup).
 *
 * A reply may contain
 *         a directory inode along with a dentry.
 *  and/or a target inode
 *
 * Called with snap_rwsem (read).
 */
int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
		    struct ceph_mds_session *session)
{
	struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
	struct inode *in = NULL;
	struct ceph_vino vino;
1117
	struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
S
Sage Weil 已提交
1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158
	int err = 0;

	dout("fill_trace %p is_dentry %d is_target %d\n", req,
	     rinfo->head->is_dentry, rinfo->head->is_target);

#if 0
	/*
	 * Debugging hook:
	 *
	 * If we resend completed ops to a recovering mds, we get no
	 * trace.  Since that is very rare, pretend this is the case
	 * to ensure the 'no trace' handlers in the callers behave.
	 *
	 * Fill in inodes unconditionally to avoid breaking cap
	 * invariants.
	 */
	if (rinfo->head->op & CEPH_MDS_OP_WRITE) {
		pr_info("fill_trace faking empty trace on %lld %s\n",
			req->r_tid, ceph_mds_op_name(rinfo->head->op));
		if (rinfo->head->is_dentry) {
			rinfo->head->is_dentry = 0;
			err = fill_inode(req->r_locked_dir,
					 &rinfo->diri, rinfo->dirfrag,
					 session, req->r_request_started, -1);
		}
		if (rinfo->head->is_target) {
			rinfo->head->is_target = 0;
			ininfo = rinfo->targeti.in;
			vino.ino = le64_to_cpu(ininfo->ino);
			vino.snap = le64_to_cpu(ininfo->snapid);
			in = ceph_get_inode(sb, vino);
			err = fill_inode(in, &rinfo->targeti, NULL,
					 session, req->r_request_started,
					 req->r_fmode);
			iput(in);
		}
	}
#endif

	if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
		dout("fill_trace reply is empty!\n");
1159 1160
		if (rinfo->head->result == 0 && req->r_locked_dir)
			ceph_invalidate_dir_request(req);
S
Sage Weil 已提交
1161 1162 1163 1164
		return 0;
	}

	if (rinfo->head->is_dentry) {
1165 1166
		struct inode *dir = req->r_locked_dir;

1167
		if (dir) {
1168 1169
			err = fill_inode(dir, NULL,
					 &rinfo->diri, rinfo->dirfrag,
1170 1171 1172
					 session, req->r_request_started, -1,
					 &req->r_caps_reservation);
			if (err < 0)
1173
				goto done;
1174 1175 1176
		} else {
			WARN_ON_ONCE(1);
		}
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189

		if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME) {
			struct qstr dname;
			struct dentry *dn, *parent;

			BUG_ON(!rinfo->head->is_target);
			BUG_ON(req->r_dentry);

			parent = d_find_any_alias(dir);
			BUG_ON(!parent);

			dname.name = rinfo->dname;
			dname.len = rinfo->dname_len;
1190
			dname.hash = full_name_hash(parent, dname.name, dname.len);
1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206
			vino.ino = le64_to_cpu(rinfo->targeti.in->ino);
			vino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
retry_lookup:
			dn = d_lookup(parent, &dname);
			dout("d_lookup on parent=%p name=%.*s got %p\n",
			     parent, dname.len, dname.name, dn);

			if (!dn) {
				dn = d_alloc(parent, &dname);
				dout("d_alloc %p '%.*s' = %p\n", parent,
				     dname.len, dname.name, dn);
				if (dn == NULL) {
					dput(parent);
					err = -ENOMEM;
					goto done;
				}
A
Al Viro 已提交
1207
				err = 0;
1208 1209 1210
			} else if (d_really_is_positive(dn) &&
				   (ceph_ino(d_inode(dn)) != vino.ino ||
				    ceph_snap(d_inode(dn)) != vino.snap)) {
1211
				dout(" dn %p points to wrong inode %p\n",
1212
				     dn, d_inode(dn));
1213 1214 1215 1216 1217 1218 1219 1220
				d_delete(dn);
				dput(dn);
				goto retry_lookup;
			}

			req->r_dentry = dn;
			dput(parent);
		}
1221 1222
	}

1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233
	if (rinfo->head->is_target) {
		vino.ino = le64_to_cpu(rinfo->targeti.in->ino);
		vino.snap = le64_to_cpu(rinfo->targeti.in->snapid);

		in = ceph_get_inode(sb, vino);
		if (IS_ERR(in)) {
			err = PTR_ERR(in);
			goto done;
		}
		req->r_target_inode = in;

1234
		err = fill_inode(in, req->r_locked_page, &rinfo->targeti, NULL,
1235
				session, req->r_request_started,
1236
				(!req->r_aborted && rinfo->head->result == 0) ?
1237 1238 1239 1240 1241 1242 1243 1244 1245
				req->r_fmode : -1,
				&req->r_caps_reservation);
		if (err < 0) {
			pr_err("fill_inode badness %p %llx.%llx\n",
				in, ceph_vinop(in));
			goto done;
		}
	}

1246 1247 1248 1249 1250
	/*
	 * ignore null lease/binding on snapdir ENOENT, or else we
	 * will have trouble splicing in the virtual snapdir later
	 */
	if (rinfo->head->is_dentry && !req->r_aborted &&
1251
	    req->r_locked_dir &&
1252
	    (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
1253
					       fsc->mount_options->snapdir_name,
1254
					       req->r_dentry->d_name.len))) {
S
Sage Weil 已提交
1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265
		/*
		 * lookup link rename   : null -> possibly existing inode
		 * mknod symlink mkdir  : null -> new inode
		 * unlink               : linked -> null
		 */
		struct inode *dir = req->r_locked_dir;
		struct dentry *dn = req->r_dentry;
		bool have_dir_cap, have_lease;

		BUG_ON(!dn);
		BUG_ON(!dir);
1266
		BUG_ON(d_inode(dn->d_parent) != dir);
S
Sage Weil 已提交
1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278
		BUG_ON(ceph_ino(dir) !=
		       le64_to_cpu(rinfo->diri.in->ino));
		BUG_ON(ceph_snap(dir) !=
		       le64_to_cpu(rinfo->diri.in->snapid));

		/* do we have a lease on the whole dir? */
		have_dir_cap =
			(le32_to_cpu(rinfo->diri.in->cap.caps) &
			 CEPH_CAP_FILE_SHARED);

		/* do we have a dn lease? */
		have_lease = have_dir_cap ||
S
Sage Weil 已提交
1279
			le32_to_cpu(rinfo->dlease->duration_ms);
S
Sage Weil 已提交
1280 1281 1282 1283 1284
		if (!have_lease)
			dout("fill_trace  no dentry lease or dir cap\n");

		/* rename? */
		if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
1285 1286 1287
			struct inode *olddir = req->r_old_dentry_dir;
			BUG_ON(!olddir);

A
Al Viro 已提交
1288
			dout(" src %p '%pd' dst %p '%pd'\n",
S
Sage Weil 已提交
1289
			     req->r_old_dentry,
A
Al Viro 已提交
1290 1291
			     req->r_old_dentry,
			     dn, dn);
S
Sage Weil 已提交
1292 1293
			dout("fill_trace doing d_move %p -> %p\n",
			     req->r_old_dentry, dn);
S
Sage Weil 已提交
1294

Y
Yan, Zheng 已提交
1295 1296 1297 1298
			/* d_move screws up sibling dentries' offsets */
			ceph_dir_clear_ordered(dir);
			ceph_dir_clear_ordered(olddir);

S
Sage Weil 已提交
1299
			d_move(req->r_old_dentry, dn);
A
Al Viro 已提交
1300 1301
			dout(" src %p '%pd' dst %p '%pd'\n",
			     req->r_old_dentry,
S
Sage Weil 已提交
1302
			     req->r_old_dentry,
A
Al Viro 已提交
1303
			     dn, dn);
1304

1305 1306
			/* ensure target dentry is invalidated, despite
			   rehashing bug in vfs_rename_dir */
1307 1308
			ceph_invalidate_dentry_lease(dn);

1309
			dout("dn %p gets new offset %lld\n", req->r_old_dentry,
S
Sage Weil 已提交
1310
			     ceph_dentry(req->r_old_dentry)->offset);
1311

S
Sage Weil 已提交
1312 1313 1314 1315 1316 1317
			dn = req->r_old_dentry;  /* use old_dentry */
		}

		/* null dentry? */
		if (!rinfo->head->is_target) {
			dout("fill_trace null dentry\n");
1318
			if (d_really_is_positive(dn)) {
1319
				ceph_dir_clear_ordered(dir);
S
Sage Weil 已提交
1320 1321 1322 1323
				dout("d_delete %p\n", dn);
				d_delete(dn);
			} else {
				if (have_lease && d_unhashed(dn))
1324
					d_add(dn, NULL);
S
Sage Weil 已提交
1325 1326 1327 1328 1329 1330 1331 1332
				update_dentry_lease(dn, rinfo->dlease,
						    session,
						    req->r_request_started);
			}
			goto done;
		}

		/* attach proper inode */
1333
		if (d_really_is_negative(dn)) {
1334
			ceph_dir_clear_ordered(dir);
1335
			ihold(in);
1336
			dn = splice_dentry(dn, in);
S
Sage Weil 已提交
1337 1338 1339 1340 1341
			if (IS_ERR(dn)) {
				err = PTR_ERR(dn);
				goto done;
			}
			req->r_dentry = dn;  /* may have spliced */
1342
		} else if (d_really_is_positive(dn) && d_inode(dn) != in) {
S
Sage Weil 已提交
1343
			dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1344
			     dn, d_inode(dn), ceph_vinop(d_inode(dn)),
1345
			     ceph_vinop(in));
1346
			d_invalidate(dn);
S
Sage Weil 已提交
1347 1348 1349 1350 1351 1352 1353
			have_lease = false;
		}

		if (have_lease)
			update_dentry_lease(dn, rinfo->dlease, session,
					    req->r_request_started);
		dout(" final dn %p\n", dn);
1354 1355 1356
	} else if (!req->r_aborted &&
		   (req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
		    req->r_op == CEPH_MDS_OP_MKSNAP)) {
S
Sage Weil 已提交
1357
		struct dentry *dn = req->r_dentry;
1358
		struct inode *dir = req->r_locked_dir;
S
Sage Weil 已提交
1359 1360 1361

		/* fill out a snapdir LOOKUPSNAP dentry */
		BUG_ON(!dn);
1362 1363
		BUG_ON(!dir);
		BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR);
S
Sage Weil 已提交
1364
		dout(" linking snapped dir %p to dn %p\n", in, dn);
1365
		ceph_dir_clear_ordered(dir);
1366
		ihold(in);
1367
		dn = splice_dentry(dn, in);
S
Sage Weil 已提交
1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381
		if (IS_ERR(dn)) {
			err = PTR_ERR(dn);
			goto done;
		}
		req->r_dentry = dn;  /* may have spliced */
	}
done:
	dout("fill_trace done err=%d\n", err);
	return err;
}

/*
 * Prepopulate our cache with readdir results, leases, etc.
 */
1382 1383 1384 1385 1386 1387 1388
static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req,
					   struct ceph_mds_session *session)
{
	struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
	int i, err = 0;

	for (i = 0; i < rinfo->dir_nr; i++) {
1389
		struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
1390 1391 1392 1393
		struct ceph_vino vino;
		struct inode *in;
		int rc;

1394 1395
		vino.ino = le64_to_cpu(rde->inode.in->ino);
		vino.snap = le64_to_cpu(rde->inode.in->snapid);
1396 1397 1398 1399 1400 1401 1402

		in = ceph_get_inode(req->r_dentry->d_sb, vino);
		if (IS_ERR(in)) {
			err = PTR_ERR(in);
			dout("new_inode badness got %d\n", err);
			continue;
		}
1403
		rc = fill_inode(in, NULL, &rde->inode, NULL, session,
1404 1405 1406 1407 1408 1409
				req->r_request_started, -1,
				&req->r_caps_reservation);
		if (rc < 0) {
			pr_err("fill_inode badness on %p got %d\n", in, rc);
			err = rc;
		}
Y
Yan, Zheng 已提交
1410
		iput(in);
1411 1412 1413 1414 1415
	}

	return err;
}

Y
Yan, Zheng 已提交
1416 1417 1418 1419
void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl)
{
	if (ctl->page) {
		kunmap(ctl->page);
1420
		put_page(ctl->page);
Y
Yan, Zheng 已提交
1421 1422 1423 1424 1425 1426 1427 1428 1429
		ctl->page = NULL;
	}
}

static int fill_readdir_cache(struct inode *dir, struct dentry *dn,
			      struct ceph_readdir_cache_control *ctl,
			      struct ceph_mds_request *req)
{
	struct ceph_inode_info *ci = ceph_inode(dir);
1430
	unsigned nsize = PAGE_SIZE / sizeof(struct dentry*);
Y
Yan, Zheng 已提交
1431 1432 1433 1434 1435
	unsigned idx = ctl->index % nsize;
	pgoff_t pgoff = ctl->index / nsize;

	if (!ctl->page || pgoff != page_index(ctl->page)) {
		ceph_readdir_cache_release(ctl);
1436 1437 1438 1439
		if (idx == 0)
			ctl->page = grab_cache_page(&dir->i_data, pgoff);
		else
			ctl->page = find_lock_page(&dir->i_data, pgoff);
Y
Yan, Zheng 已提交
1440 1441
		if (!ctl->page) {
			ctl->index = -1;
1442
			return idx == 0 ? -ENOMEM : 0;
Y
Yan, Zheng 已提交
1443 1444 1445 1446 1447
		}
		/* reading/filling the cache are serialized by
		 * i_mutex, no need to use page lock */
		unlock_page(ctl->page);
		ctl->dentries = kmap(ctl->page);
1448
		if (idx == 0)
1449
			memset(ctl->dentries, 0, PAGE_SIZE);
Y
Yan, Zheng 已提交
1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463
	}

	if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) &&
	    req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) {
		dout("readdir cache dn %p idx %d\n", dn, ctl->index);
		ctl->dentries[idx] = dn;
		ctl->index++;
	} else {
		dout("disable readdir cache\n");
		ctl->index = -1;
	}
	return 0;
}

S
Sage Weil 已提交
1464 1465 1466 1467
int ceph_readdir_prepopulate(struct ceph_mds_request *req,
			     struct ceph_mds_session *session)
{
	struct dentry *parent = req->r_dentry;
1468
	struct ceph_inode_info *ci = ceph_inode(d_inode(parent));
S
Sage Weil 已提交
1469 1470 1471 1472
	struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
	struct qstr dname;
	struct dentry *dn;
	struct inode *in;
Y
Yan, Zheng 已提交
1473
	int err = 0, skipped = 0, ret, i;
S
Sage Weil 已提交
1474 1475
	struct inode *snapdir = NULL;
	struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
1476
	u32 frag = le32_to_cpu(rhead->args.readdir.frag);
1477 1478
	u32 last_hash = 0;
	u32 fpos_offset;
Y
Yan, Zheng 已提交
1479 1480 1481 1482
	struct ceph_readdir_cache_control cache_ctl = {};

	if (req->r_aborted)
		return readdir_prepopulate_inodes_only(req, session);
1483

1484 1485 1486 1487 1488 1489
	if (rinfo->hash_order && req->r_path2) {
		last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
					  req->r_path2, strlen(req->r_path2));
		last_hash = ceph_frag_value(last_hash);
	}

1490 1491 1492 1493 1494
	if (rinfo->dir_dir &&
	    le32_to_cpu(rinfo->dir_dir->frag) != frag) {
		dout("readdir_prepopulate got new frag %x -> %x\n",
		     frag, le32_to_cpu(rinfo->dir_dir->frag));
		frag = le32_to_cpu(rinfo->dir_dir->frag);
1495
		if (!rinfo->hash_order)
Y
Yan, Zheng 已提交
1496
			req->r_readdir_offset = 2;
1497
	}
S
Sage Weil 已提交
1498 1499

	if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
1500
		snapdir = ceph_get_snapdir(d_inode(parent));
S
Sage Weil 已提交
1501 1502 1503 1504 1505 1506 1507
		parent = d_find_alias(snapdir);
		dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
		     rinfo->dir_nr, parent);
	} else {
		dout("readdir_prepopulate %d items under dn %p\n",
		     rinfo->dir_nr, parent);
		if (rinfo->dir_dir)
1508
			ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
S
Sage Weil 已提交
1509 1510
	}

1511 1512
	if (ceph_frag_is_leftmost(frag) && req->r_readdir_offset == 2 &&
	    !(rinfo->hash_order && req->r_path2)) {
Y
Yan, Zheng 已提交
1513 1514 1515 1516 1517 1518 1519 1520
		/* note dir version at start of readdir so we can tell
		 * if any dentries get dropped */
		req->r_dir_release_cnt = atomic64_read(&ci->i_release_count);
		req->r_dir_ordered_cnt = atomic64_read(&ci->i_ordered_count);
		req->r_readdir_cache_idx = 0;
	}

	cache_ctl.index = req->r_readdir_cache_idx;
1521
	fpos_offset = req->r_readdir_offset;
Y
Yan, Zheng 已提交
1522

1523
	/* FIXME: release caps/leases if error occurs */
S
Sage Weil 已提交
1524
	for (i = 0; i < rinfo->dir_nr; i++) {
1525
		struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
S
Sage Weil 已提交
1526 1527
		struct ceph_vino vino;

1528 1529
		dname.name = rde->name;
		dname.len = rde->name_len;
1530
		dname.hash = full_name_hash(parent, dname.name, dname.len);
S
Sage Weil 已提交
1531

1532 1533
		vino.ino = le64_to_cpu(rde->inode.in->ino);
		vino.snap = le64_to_cpu(rde->inode.in->snapid);
S
Sage Weil 已提交
1534

1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545
		if (rinfo->hash_order) {
			u32 hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
						 rde->name, rde->name_len);
			hash = ceph_frag_value(hash);
			if (hash != last_hash)
				fpos_offset = 2;
			last_hash = hash;
			rde->offset = ceph_make_fpos(hash, fpos_offset++, true);
		} else {
			rde->offset = ceph_make_fpos(frag, fpos_offset++, false);
		}
S
Sage Weil 已提交
1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560

retry_lookup:
		dn = d_lookup(parent, &dname);
		dout("d_lookup on parent=%p name=%.*s got %p\n",
		     parent, dname.len, dname.name, dn);

		if (!dn) {
			dn = d_alloc(parent, &dname);
			dout("d_alloc %p '%.*s' = %p\n", parent,
			     dname.len, dname.name, dn);
			if (dn == NULL) {
				dout("d_alloc badness\n");
				err = -ENOMEM;
				goto out;
			}
1561 1562 1563
		} else if (d_really_is_positive(dn) &&
			   (ceph_ino(d_inode(dn)) != vino.ino ||
			    ceph_snap(d_inode(dn)) != vino.snap)) {
S
Sage Weil 已提交
1564
			dout(" dn %p points to wrong inode %p\n",
1565
			     dn, d_inode(dn));
S
Sage Weil 已提交
1566 1567 1568 1569 1570 1571
			d_delete(dn);
			dput(dn);
			goto retry_lookup;
		}

		/* inode */
1572 1573
		if (d_really_is_positive(dn)) {
			in = d_inode(dn);
S
Sage Weil 已提交
1574 1575
		} else {
			in = ceph_get_inode(parent->d_sb, vino);
1576
			if (IS_ERR(in)) {
S
Sage Weil 已提交
1577
				dout("new_inode badness\n");
1578
				d_drop(dn);
S
Sage Weil 已提交
1579
				dput(dn);
1580
				err = PTR_ERR(in);
S
Sage Weil 已提交
1581 1582 1583 1584
				goto out;
			}
		}

1585
		ret = fill_inode(in, NULL, &rde->inode, NULL, session,
Y
Yan, Zheng 已提交
1586 1587 1588
				 req->r_request_started, -1,
				 &req->r_caps_reservation);
		if (ret < 0) {
S
Sage Weil 已提交
1589
			pr_err("fill_inode badness on %p\n", in);
1590
			if (d_really_is_negative(dn))
1591 1592
				iput(in);
			d_drop(dn);
Y
Yan, Zheng 已提交
1593
			err = ret;
1594
			goto next_item;
S
Sage Weil 已提交
1595
		}
1596

1597
		if (d_really_is_negative(dn)) {
Y
Yan, Zheng 已提交
1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608
			struct dentry *realdn;

			if (ceph_security_xattr_deadlock(in)) {
				dout(" skip splicing dn %p to inode %p"
				     " (security xattr deadlock)\n", dn, in);
				iput(in);
				skipped++;
				goto next_item;
			}

			realdn = splice_dentry(dn, in);
Y
Yan, Zheng 已提交
1609 1610 1611
			if (IS_ERR(realdn)) {
				err = PTR_ERR(realdn);
				d_drop(dn);
1612 1613 1614
				dn = NULL;
				goto next_item;
			}
Y
Yan, Zheng 已提交
1615
			dn = realdn;
1616 1617
		}

1618
		ceph_dentry(dn)->offset = rde->offset;
1619

1620
		update_dentry_lease(dn, rde->lease, req->r_session,
1621
				    req->r_request_started);
Y
Yan, Zheng 已提交
1622

Y
Yan, Zheng 已提交
1623
		if (err == 0 && skipped == 0 && cache_ctl.index >= 0) {
Y
Yan, Zheng 已提交
1624 1625 1626 1627 1628
			ret = fill_readdir_cache(d_inode(parent), dn,
						 &cache_ctl, req);
			if (ret < 0)
				err = ret;
		}
1629 1630 1631
next_item:
		if (dn)
			dput(dn);
S
Sage Weil 已提交
1632 1633
	}
out:
Y
Yan, Zheng 已提交
1634
	if (err == 0 && skipped == 0) {
Y
Yan, Zheng 已提交
1635 1636 1637 1638
		req->r_did_prepopulate = true;
		req->r_readdir_cache_idx = cache_ctl.index;
	}
	ceph_readdir_cache_release(&cache_ctl);
S
Sage Weil 已提交
1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651
	if (snapdir) {
		iput(snapdir);
		dput(parent);
	}
	dout("readdir_prepopulate done\n");
	return err;
}

int ceph_inode_set_size(struct inode *inode, loff_t size)
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	int ret = 0;

1652
	spin_lock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1653
	dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
1654
	i_size_write(inode, size);
1655
	inode->i_blocks = calc_inode_blocks(size);
S
Sage Weil 已提交
1656 1657 1658 1659 1660 1661

	/* tell the MDS if we are approaching max_size */
	if ((size << 1) >= ci->i_max_size &&
	    (ci->i_reported_size << 1) < ci->i_max_size)
		ret = 1;

1662
	spin_unlock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1663 1664 1665 1666 1667 1668 1669
	return ret;
}

/*
 * Write back inode data in a worker thread.  (This can't be done
 * in the message handler context.)
 */
1670 1671
void ceph_queue_writeback(struct inode *inode)
{
1672
	ihold(inode);
1673 1674
	if (queue_work(ceph_inode_to_client(inode)->wb_wq,
		       &ceph_inode(inode)->i_wb_work)) {
1675
		dout("ceph_queue_writeback %p\n", inode);
1676
	} else {
1677
		dout("ceph_queue_writeback %p failed\n", inode);
1678
		iput(inode);
1679 1680 1681 1682
	}
}

static void ceph_writeback_work(struct work_struct *work)
S
Sage Weil 已提交
1683 1684 1685 1686 1687 1688 1689 1690 1691 1692
{
	struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
						  i_wb_work);
	struct inode *inode = &ci->vfs_inode;

	dout("writeback %p\n", inode);
	filemap_fdatawrite(&inode->i_data);
	iput(inode);
}

1693 1694 1695 1696 1697
/*
 * queue an async invalidation
 */
void ceph_queue_invalidate(struct inode *inode)
{
1698
	ihold(inode);
1699 1700 1701 1702 1703
	if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq,
		       &ceph_inode(inode)->i_pg_inv_work)) {
		dout("ceph_queue_invalidate %p\n", inode);
	} else {
		dout("ceph_queue_invalidate %p failed\n", inode);
1704
		iput(inode);
1705 1706 1707
	}
}

S
Sage Weil 已提交
1708 1709 1710 1711
/*
 * Invalidate inode pages in a worker thread.  (This can't be done
 * in the message handler context.)
 */
1712
static void ceph_invalidate_work(struct work_struct *work)
S
Sage Weil 已提交
1713 1714 1715 1716
{
	struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
						  i_pg_inv_work);
	struct inode *inode = &ci->vfs_inode;
1717
	struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
S
Sage Weil 已提交
1718 1719 1720
	u32 orig_gen;
	int check = 0;

Y
Yan, Zheng 已提交
1721
	mutex_lock(&ci->i_truncate_mutex);
1722 1723 1724 1725 1726 1727 1728 1729 1730 1731

	if (ACCESS_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) {
		pr_warn_ratelimited("invalidate_pages %p %lld forced umount\n",
				    inode, ceph_ino(inode));
		mapping_set_error(inode->i_mapping, -EIO);
		truncate_pagecache(inode, 0);
		mutex_unlock(&ci->i_truncate_mutex);
		goto out;
	}

1732
	spin_lock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1733 1734
	dout("invalidate_pages %p gen %d revoking %d\n", inode,
	     ci->i_rdcache_gen, ci->i_rdcache_revoking);
1735
	if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
Y
Yan, Zheng 已提交
1736 1737
		if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
			check = 1;
1738
		spin_unlock(&ci->i_ceph_lock);
Y
Yan, Zheng 已提交
1739
		mutex_unlock(&ci->i_truncate_mutex);
S
Sage Weil 已提交
1740 1741 1742
		goto out;
	}
	orig_gen = ci->i_rdcache_gen;
1743
	spin_unlock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1744

1745 1746 1747
	if (invalidate_inode_pages2(inode->i_mapping) < 0) {
		pr_err("invalidate_pages %p fails\n", inode);
	}
S
Sage Weil 已提交
1748

1749
	spin_lock(&ci->i_ceph_lock);
1750 1751
	if (orig_gen == ci->i_rdcache_gen &&
	    orig_gen == ci->i_rdcache_revoking) {
S
Sage Weil 已提交
1752 1753
		dout("invalidate_pages %p gen %d successful\n", inode,
		     ci->i_rdcache_gen);
1754
		ci->i_rdcache_revoking--;
S
Sage Weil 已提交
1755 1756
		check = 1;
	} else {
1757 1758 1759
		dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
		     inode, orig_gen, ci->i_rdcache_gen,
		     ci->i_rdcache_revoking);
Y
Yan, Zheng 已提交
1760 1761
		if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
			check = 1;
S
Sage Weil 已提交
1762
	}
1763
	spin_unlock(&ci->i_ceph_lock);
Y
Yan, Zheng 已提交
1764
	mutex_unlock(&ci->i_truncate_mutex);
Y
Yan, Zheng 已提交
1765
out:
S
Sage Weil 已提交
1766 1767 1768 1769 1770 1771 1772
	if (check)
		ceph_check_caps(ci, 0, NULL);
	iput(inode);
}


/*
1773
 * called by trunc_wq;
S
Sage Weil 已提交
1774 1775 1776
 *
 * We also truncate in a separate thread as well.
 */
1777
static void ceph_vmtruncate_work(struct work_struct *work)
S
Sage Weil 已提交
1778 1779 1780 1781 1782 1783
{
	struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
						  i_vmtruncate_work);
	struct inode *inode = &ci->vfs_inode;

	dout("vmtruncate_work %p\n", inode);
Y
Yan, Zheng 已提交
1784
	__ceph_do_pending_vmtruncate(inode);
S
Sage Weil 已提交
1785 1786 1787
	iput(inode);
}

1788 1789 1790 1791 1792 1793 1794 1795
/*
 * Queue an async vmtruncate.  If we fail to queue work, we will handle
 * the truncation the next time we call __ceph_do_pending_vmtruncate.
 */
void ceph_queue_vmtruncate(struct inode *inode)
{
	struct ceph_inode_info *ci = ceph_inode(inode);

1796
	ihold(inode);
1797

1798
	if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq,
1799 1800 1801 1802 1803
		       &ci->i_vmtruncate_work)) {
		dout("ceph_queue_vmtruncate %p\n", inode);
	} else {
		dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
		     inode, ci->i_truncate_pending);
1804
		iput(inode);
1805 1806 1807
	}
}

S
Sage Weil 已提交
1808 1809 1810 1811
/*
 * Make sure any pending truncation is applied before doing anything
 * that may depend on it.
 */
Y
Yan, Zheng 已提交
1812
void __ceph_do_pending_vmtruncate(struct inode *inode)
S
Sage Weil 已提交
1813 1814 1815
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	u64 to;
1816
	int wrbuffer_refs, finish = 0;
S
Sage Weil 已提交
1817

Y
Yan, Zheng 已提交
1818
	mutex_lock(&ci->i_truncate_mutex);
S
Sage Weil 已提交
1819
retry:
1820
	spin_lock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1821 1822
	if (ci->i_truncate_pending == 0) {
		dout("__do_pending_vmtruncate %p none pending\n", inode);
1823
		spin_unlock(&ci->i_ceph_lock);
Y
Yan, Zheng 已提交
1824
		mutex_unlock(&ci->i_truncate_mutex);
S
Sage Weil 已提交
1825 1826 1827 1828 1829 1830 1831 1832 1833 1834
		return;
	}

	/*
	 * make sure any dirty snapped pages are flushed before we
	 * possibly truncate them.. so write AND block!
	 */
	if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
		dout("__do_pending_vmtruncate %p flushing snaps first\n",
		     inode);
1835
		spin_unlock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1836 1837 1838 1839 1840
		filemap_write_and_wait_range(&inode->i_data, 0,
					     inode->i_sb->s_maxbytes);
		goto retry;
	}

Y
Yan, Zheng 已提交
1841 1842 1843
	/* there should be no reader or writer */
	WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref);

S
Sage Weil 已提交
1844 1845 1846 1847
	to = ci->i_truncate_size;
	wrbuffer_refs = ci->i_wrbuffer_ref;
	dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode,
	     ci->i_truncate_pending, to);
1848
	spin_unlock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1849

1850
	truncate_pagecache(inode, to);
S
Sage Weil 已提交
1851

1852
	spin_lock(&ci->i_ceph_lock);
1853 1854 1855 1856
	if (to == ci->i_truncate_size) {
		ci->i_truncate_pending = 0;
		finish = 1;
	}
1857
	spin_unlock(&ci->i_ceph_lock);
1858 1859
	if (!finish)
		goto retry;
S
Sage Weil 已提交
1860

Y
Yan, Zheng 已提交
1861 1862
	mutex_unlock(&ci->i_truncate_mutex);

S
Sage Weil 已提交
1863 1864
	if (wrbuffer_refs == 0)
		ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
1865 1866

	wake_up_all(&ci->i_cap_wq);
S
Sage Weil 已提交
1867 1868 1869 1870 1871 1872
}

/*
 * symlinks
 */
static const struct inode_operations ceph_symlink_iops = {
1873
	.get_link = simple_get_link,
Y
Yan, Zheng 已提交
1874 1875 1876
	.setattr = ceph_setattr,
	.getattr = ceph_getattr,
	.listxattr = ceph_listxattr,
S
Sage Weil 已提交
1877 1878
};

1879
int __ceph_setattr(struct inode *inode, struct iattr *attr)
S
Sage Weil 已提交
1880 1881 1882 1883
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	const unsigned int ia_valid = attr->ia_valid;
	struct ceph_mds_request *req;
1884
	struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
1885
	struct ceph_cap_flush *prealloc_cf;
S
Sage Weil 已提交
1886 1887 1888 1889
	int issued;
	int release = 0, dirtied = 0;
	int mask = 0;
	int err = 0;
1890
	int inode_dirty_flags = 0;
1891
	bool lock_snap_rwsem = false;
S
Sage Weil 已提交
1892

1893 1894 1895 1896
	prealloc_cf = ceph_alloc_cap_flush();
	if (!prealloc_cf)
		return -ENOMEM;

S
Sage Weil 已提交
1897 1898
	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
				       USE_AUTH_MDS);
1899 1900
	if (IS_ERR(req)) {
		ceph_free_cap_flush(prealloc_cf);
S
Sage Weil 已提交
1901
		return PTR_ERR(req);
1902
	}
S
Sage Weil 已提交
1903

1904
	spin_lock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1905
	issued = __ceph_caps_issued(ci, NULL);
1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917

	if (!ci->i_head_snapc &&
	    (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) {
		lock_snap_rwsem = true;
		if (!down_read_trylock(&mdsc->snap_rwsem)) {
			spin_unlock(&ci->i_ceph_lock);
			down_read(&mdsc->snap_rwsem);
			spin_lock(&ci->i_ceph_lock);
			issued = __ceph_caps_issued(ci, NULL);
		}
	}

S
Sage Weil 已提交
1918 1919 1920 1921
	dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));

	if (ia_valid & ATTR_UID) {
		dout("setattr %p uid %d -> %d\n", inode,
1922 1923
		     from_kuid(&init_user_ns, inode->i_uid),
		     from_kuid(&init_user_ns, attr->ia_uid));
S
Sage Weil 已提交
1924 1925 1926 1927
		if (issued & CEPH_CAP_AUTH_EXCL) {
			inode->i_uid = attr->ia_uid;
			dirtied |= CEPH_CAP_AUTH_EXCL;
		} else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1928 1929 1930
			   !uid_eq(attr->ia_uid, inode->i_uid)) {
			req->r_args.setattr.uid = cpu_to_le32(
				from_kuid(&init_user_ns, attr->ia_uid));
S
Sage Weil 已提交
1931 1932 1933 1934 1935 1936
			mask |= CEPH_SETATTR_UID;
			release |= CEPH_CAP_AUTH_SHARED;
		}
	}
	if (ia_valid & ATTR_GID) {
		dout("setattr %p gid %d -> %d\n", inode,
1937 1938
		     from_kgid(&init_user_ns, inode->i_gid),
		     from_kgid(&init_user_ns, attr->ia_gid));
S
Sage Weil 已提交
1939 1940 1941 1942
		if (issued & CEPH_CAP_AUTH_EXCL) {
			inode->i_gid = attr->ia_gid;
			dirtied |= CEPH_CAP_AUTH_EXCL;
		} else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1943 1944 1945
			   !gid_eq(attr->ia_gid, inode->i_gid)) {
			req->r_args.setattr.gid = cpu_to_le32(
				from_kgid(&init_user_ns, attr->ia_gid));
S
Sage Weil 已提交
1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957
			mask |= CEPH_SETATTR_GID;
			release |= CEPH_CAP_AUTH_SHARED;
		}
	}
	if (ia_valid & ATTR_MODE) {
		dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode,
		     attr->ia_mode);
		if (issued & CEPH_CAP_AUTH_EXCL) {
			inode->i_mode = attr->ia_mode;
			dirtied |= CEPH_CAP_AUTH_EXCL;
		} else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
			   attr->ia_mode != inode->i_mode) {
G
Guangliang Zhao 已提交
1958
			inode->i_mode = attr->ia_mode;
S
Sage Weil 已提交
1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
			req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
			mask |= CEPH_SETATTR_MODE;
			release |= CEPH_CAP_AUTH_SHARED;
		}
	}

	if (ia_valid & ATTR_ATIME) {
		dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode,
		     inode->i_atime.tv_sec, inode->i_atime.tv_nsec,
		     attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
		if (issued & CEPH_CAP_FILE_EXCL) {
			ci->i_time_warp_seq++;
			inode->i_atime = attr->ia_atime;
			dirtied |= CEPH_CAP_FILE_EXCL;
		} else if ((issued & CEPH_CAP_FILE_WR) &&
			   timespec_compare(&inode->i_atime,
					    &attr->ia_atime) < 0) {
			inode->i_atime = attr->ia_atime;
			dirtied |= CEPH_CAP_FILE_WR;
		} else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
			   !timespec_equal(&inode->i_atime, &attr->ia_atime)) {
			ceph_encode_timespec(&req->r_args.setattr.atime,
					     &attr->ia_atime);
			mask |= CEPH_SETATTR_ATIME;
			release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD |
				CEPH_CAP_FILE_WR;
		}
	}
	if (ia_valid & ATTR_MTIME) {
		dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode,
		     inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
		     attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
		if (issued & CEPH_CAP_FILE_EXCL) {
			ci->i_time_warp_seq++;
			inode->i_mtime = attr->ia_mtime;
			dirtied |= CEPH_CAP_FILE_EXCL;
		} else if ((issued & CEPH_CAP_FILE_WR) &&
			   timespec_compare(&inode->i_mtime,
					    &attr->ia_mtime) < 0) {
			inode->i_mtime = attr->ia_mtime;
			dirtied |= CEPH_CAP_FILE_WR;
		} else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
			   !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) {
			ceph_encode_timespec(&req->r_args.setattr.mtime,
					     &attr->ia_mtime);
			mask |= CEPH_SETATTR_MTIME;
			release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
				CEPH_CAP_FILE_WR;
		}
	}
	if (ia_valid & ATTR_SIZE) {
		dout("setattr %p size %lld -> %lld\n", inode,
		     inode->i_size, attr->ia_size);
		if ((issued & CEPH_CAP_FILE_EXCL) &&
		    attr->ia_size > inode->i_size) {
2014
			i_size_write(inode, attr->ia_size);
2015
			inode->i_blocks = calc_inode_blocks(attr->ia_size);
S
Sage Weil 已提交
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058
			inode->i_ctime = attr->ia_ctime;
			ci->i_reported_size = attr->ia_size;
			dirtied |= CEPH_CAP_FILE_EXCL;
		} else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
			   attr->ia_size != inode->i_size) {
			req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
			req->r_args.setattr.old_size =
				cpu_to_le64(inode->i_size);
			mask |= CEPH_SETATTR_SIZE;
			release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
				CEPH_CAP_FILE_WR;
		}
	}

	/* these do nothing */
	if (ia_valid & ATTR_CTIME) {
		bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
					 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
		dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode,
		     inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
		     attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
		     only ? "ctime only" : "ignored");
		inode->i_ctime = attr->ia_ctime;
		if (only) {
			/*
			 * if kernel wants to dirty ctime but nothing else,
			 * we need to choose a cap to dirty under, or do
			 * a almost-no-op setattr
			 */
			if (issued & CEPH_CAP_AUTH_EXCL)
				dirtied |= CEPH_CAP_AUTH_EXCL;
			else if (issued & CEPH_CAP_FILE_EXCL)
				dirtied |= CEPH_CAP_FILE_EXCL;
			else if (issued & CEPH_CAP_XATTR_EXCL)
				dirtied |= CEPH_CAP_XATTR_EXCL;
			else
				mask |= CEPH_SETATTR_CTIME;
		}
	}
	if (ia_valid & ATTR_FILE)
		dout("setattr %p ATTR_FILE ... hrm!\n", inode);

	if (dirtied) {
2059 2060
		inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied,
							   &prealloc_cf);
2061
		inode->i_ctime = current_time(inode);
S
Sage Weil 已提交
2062 2063 2064
	}

	release &= issued;
2065
	spin_unlock(&ci->i_ceph_lock);
2066 2067
	if (lock_snap_rwsem)
		up_read(&mdsc->snap_rwsem);
S
Sage Weil 已提交
2068

2069 2070 2071
	if (inode_dirty_flags)
		__mark_inode_dirty(inode, inode_dirty_flags);

G
Guangliang Zhao 已提交
2072
	if (ia_valid & ATTR_MODE) {
2073
		err = posix_acl_chmod(inode, attr->ia_mode);
G
Guangliang Zhao 已提交
2074 2075 2076 2077
		if (err)
			goto out_put;
	}

S
Sage Weil 已提交
2078
	if (mask) {
2079 2080
		req->r_inode = inode;
		ihold(inode);
S
Sage Weil 已提交
2081 2082 2083
		req->r_inode_drop = release;
		req->r_args.setattr.mask = cpu_to_le32(mask);
		req->r_num_caps = 1;
2084
		err = ceph_mdsc_do_request(mdsc, NULL, req);
S
Sage Weil 已提交
2085 2086 2087 2088 2089
	}
	dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
	     ceph_cap_string(dirtied), mask);

	ceph_mdsc_put_request(req);
Y
Yan, Zheng 已提交
2090 2091
	if (mask & CEPH_SETATTR_SIZE)
		__ceph_do_pending_vmtruncate(inode);
2092
	ceph_free_cap_flush(prealloc_cf);
S
Sage Weil 已提交
2093
	return err;
G
Guangliang Zhao 已提交
2094
out_put:
S
Sage Weil 已提交
2095
	ceph_mdsc_put_request(req);
2096
	ceph_free_cap_flush(prealloc_cf);
S
Sage Weil 已提交
2097 2098 2099
	return err;
}

2100 2101 2102 2103 2104
/*
 * setattr
 */
int ceph_setattr(struct dentry *dentry, struct iattr *attr)
{
2105 2106 2107 2108 2109 2110
	struct inode *inode = d_inode(dentry);
	int err;

	if (ceph_snap(inode) != CEPH_NOSNAP)
		return -EROFS;

2111
	err = setattr_prepare(dentry, attr);
2112 2113 2114 2115
	if (err != 0)
		return err;

	return __ceph_setattr(inode, attr);
2116 2117
}

S
Sage Weil 已提交
2118 2119 2120 2121
/*
 * Verify that we have a lease on the given mask.  If not,
 * do a getattr against an mds.
 */
2122 2123
int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
		      int mask, bool force)
S
Sage Weil 已提交
2124
{
2125 2126
	struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
	struct ceph_mds_client *mdsc = fsc->mdsc;
S
Sage Weil 已提交
2127 2128 2129 2130 2131 2132 2133 2134
	struct ceph_mds_request *req;
	int err;

	if (ceph_snap(inode) == CEPH_SNAPDIR) {
		dout("do_getattr inode %p SNAPDIR\n", inode);
		return 0;
	}

2135 2136
	dout("do_getattr inode %p mask %s mode 0%o\n",
	     inode, ceph_cap_string(mask), inode->i_mode);
2137
	if (!force && ceph_caps_issued_mask(ceph_inode(inode), mask, 1))
S
Sage Weil 已提交
2138 2139 2140 2141 2142
		return 0;

	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
	if (IS_ERR(req))
		return PTR_ERR(req);
2143 2144
	req->r_inode = inode;
	ihold(inode);
S
Sage Weil 已提交
2145 2146
	req->r_num_caps = 1;
	req->r_args.getattr.mask = cpu_to_le32(mask);
2147
	req->r_locked_page = locked_page;
S
Sage Weil 已提交
2148
	err = ceph_mdsc_do_request(mdsc, NULL, req);
2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159
	if (locked_page && err == 0) {
		u64 inline_version = req->r_reply_info.targeti.inline_version;
		if (inline_version == 0) {
			/* the reply is supposed to contain inline data */
			err = -EINVAL;
		} else if (inline_version == CEPH_INLINE_NONE) {
			err = -ENODATA;
		} else {
			err = req->r_reply_info.targeti.inline_len;
		}
	}
S
Sage Weil 已提交
2160 2161 2162 2163 2164 2165 2166 2167 2168 2169
	ceph_mdsc_put_request(req);
	dout("do_getattr result=%d\n", err);
	return err;
}


/*
 * Check inode permissions.  We verify we have a valid value for
 * the AUTH cap, then call the generic handler.
 */
2170
int ceph_permission(struct inode *inode, int mask)
S
Sage Weil 已提交
2171
{
2172 2173
	int err;

2174
	if (mask & MAY_NOT_BLOCK)
2175 2176
		return -ECHILD;

2177
	err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false);
S
Sage Weil 已提交
2178 2179

	if (!err)
2180
		err = generic_permission(inode, mask);
S
Sage Weil 已提交
2181 2182 2183 2184 2185 2186 2187 2188 2189 2190
	return err;
}

/*
 * Get all attributes.  Hopefully somedata we'll have a statlite()
 * and can limit the fields we require to be accurate.
 */
int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
		 struct kstat *stat)
{
2191
	struct inode *inode = d_inode(dentry);
2192
	struct ceph_inode_info *ci = ceph_inode(inode);
S
Sage Weil 已提交
2193 2194
	int err;

2195
	err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL, false);
S
Sage Weil 已提交
2196 2197
	if (!err) {
		generic_fillattr(inode, stat);
Y
Yehuda Sadeh 已提交
2198
		stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
S
Sage Weil 已提交
2199 2200 2201 2202
		if (ceph_snap(inode) != CEPH_NOSNAP)
			stat->dev = ceph_snap(inode);
		else
			stat->dev = 0;
2203
		if (S_ISDIR(inode->i_mode)) {
2204 2205 2206 2207 2208
			if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb),
						RBYTES))
				stat->size = ci->i_rbytes;
			else
				stat->size = ci->i_files + ci->i_subdirs;
2209
			stat->blocks = 0;
S
Sage Weil 已提交
2210
			stat->blksize = 65536;
2211
		}
S
Sage Weil 已提交
2212 2213 2214
	}
	return err;
}