inode.c 57.6 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/posix_acl.h>
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#include <linux/random.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,
	.setxattr = ceph_setxattr,
	.getxattr = ceph_getxattr,
	.listxattr = ceph_listxattr,
	.removexattr = ceph_removexattr,
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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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	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 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);
	struct ceph_inode_frag *frag;
	struct rb_node *rb_node;
	int i;
	u32 id, nsplits;
	bool update = false;

	mutex_lock(&ci->i_fragtree_mutex);
	nsplits = le32_to_cpu(fragtree->nsplits);
	if (nsplits) {
		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;

	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);
		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);
			rb_erase(&frag->node, &ci->i_fragtree);
			kfree(frag);
			frag = NULL;
		}
		if (!frag) {
			frag = __get_or_create_frag(ci, id);
			if (IS_ERR(frag))
				continue;
		}
		frag->split_by = le32_to_cpu(fragtree->splits[i].by);
		dout(" frag %x split by %d\n", frag->frag, frag->split_by);
	}
	while (rb_node) {
		frag = rb_entry(rb_node, struct ceph_inode_frag, node);
		rb_node = rb_next(rb_node);
		rb_erase(&frag->node, &ci->i_fragtree);
		kfree(frag);
	}
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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	ci->i_pool_ns_len = 0;
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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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	ci->i_cap_flush_tree = RB_ROOT;
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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;

	for (i = 0; i < CEPH_FILE_MODE_NUM; i++)
		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);
	}

	__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);
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	call_rcu(&inode->i_rcu, ceph_i_callback);
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}

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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;
}

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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);
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		if (size > 0 && S_ISDIR(inode->i_mode)) {
			pr_err("fill_file_size non-zero size for directory\n");
			size = 0;
		}
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		i_size_write(inode, size);
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		inode->i_blocks = (size + (1<<9) - 1) >> 9;
		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;
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			/* 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));
569 570 571 572 573 574
			/*
			 * 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
575 576
			if ((issued & (CEPH_CAP_FILE_CACHE|
				       CEPH_CAP_FILE_BUFFER)) ||
577 578
			    mapping_mapped(inode->i_mapping) ||
			    __ceph_caps_file_wanted(ci)) {
S
Sage Weil 已提交
579 580 581 582 583 584 585 586 587 588 589
				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;
	}
590 591 592 593

	if (queue_trunc)
		ceph_fscache_invalidate(inode);

S
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594 595 596 597 598 599 600 601 602 603 604 605
	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
606 607 608
		      CEPH_CAP_FILE_BUFFER|
		      CEPH_CAP_AUTH_EXCL|
		      CEPH_CAP_XATTR_EXCL)) {
S
Sage Weil 已提交
609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647
		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
Sage Weil 已提交
648
		/* we have no write|excl caps; whatever the MDS says is true */
S
Sage Weil 已提交
649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666
		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.
 */
667
static int fill_inode(struct inode *inode, struct page *locked_page,
S
Sage Weil 已提交
668 669 670 671 672 673
		      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)
{
674
	struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
S
Sage Weil 已提交
675 676
	struct ceph_mds_reply_inode *info = iinfo->in;
	struct ceph_inode_info *ci = ceph_inode(inode);
677
	int issued = 0, implemented, new_issued;
S
Sage Weil 已提交
678 679
	struct timespec mtime, atime, ctime;
	struct ceph_buffer *xattr_blob = NULL;
680
	struct ceph_cap *new_cap = NULL;
S
Sage Weil 已提交
681
	int err = 0;
682
	bool wake = false;
683 684
	bool queue_trunc = false;
	bool new_version = false;
Y
Yan, Zheng 已提交
685
	bool fill_inline = false;
S
Sage Weil 已提交
686 687 688 689 690

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

691 692 693 694
	/* 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
695 696 697 698 699 700
	/*
	 * 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
701
		xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
S
Sage Weil 已提交
702 703 704 705 706
		if (!xattr_blob)
			pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
			       iinfo->xattr_len);
	}

707
	spin_lock(&ci->i_ceph_lock);
S
Sage Weil 已提交
708 709 710

	/*
	 * provided version will be odd if inode value is projected,
711 712 713 714 715 716 717 718
	 * 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
719
	 */
720 721 722 723 724
	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
725 726
	issued = __ceph_caps_issued(ci, &implemented);
	issued |= implemented | __ceph_caps_dirty(ci);
727
	new_issued = ~issued & le32_to_cpu(info->cap.caps);
S
Sage Weil 已提交
728 729 730 731 732

	/* update inode */
	ci->i_version = le64_to_cpu(info->version);
	inode->i_version++;
	inode->i_rdev = le32_to_cpu(info->rdev);
733
	inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
S
Sage Weil 已提交
734

735 736
	if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
	    (issued & CEPH_CAP_AUTH_EXCL) == 0) {
S
Sage Weil 已提交
737
		inode->i_mode = le32_to_cpu(info->mode);
738 739
		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
740
		dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
741 742
		     from_kuid(&init_user_ns, inode->i_uid),
		     from_kgid(&init_user_ns, inode->i_gid));
S
Sage Weil 已提交
743 744
	}

745 746
	if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
	    (issued & CEPH_CAP_LINK_EXCL) == 0)
M
Miklos Szeredi 已提交
747
		set_nlink(inode, le32_to_cpu(info->nlink));
S
Sage Weil 已提交
748

749 750 751 752 753 754 755 756 757 758 759 760
	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))) {
761 762
		if (ci->i_layout.fl_pg_pool != info->layout.fl_pg_pool)
			ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;
763
		ci->i_layout = info->layout;
764
		ci->i_pool_ns_len = iinfo->pool_ns_len;
765

766 767 768 769 770 771 772 773 774 775 776 777
		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
778 779 780

	/* xattrs */
	/* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
781
	if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL))  &&
S
Sage Weil 已提交
782 783 784 785 786 787 788 789
	    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
790
		ceph_forget_all_cached_acls(inode);
791
		xattr_blob = NULL;
S
Sage Weil 已提交
792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810
	}

	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) {
811
			u32 symlen = iinfo->symlink_len;
S
Sage Weil 已提交
812 813
			char *sym;

814
			spin_unlock(&ci->i_ceph_lock);
S
Sage Weil 已提交
815

816
			err = -EINVAL;
817
			if (WARN_ON(symlen != i_size_read(inode)))
818 819
				goto out;

S
Sage Weil 已提交
820
			err = -ENOMEM;
821
			sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
S
Sage Weil 已提交
822 823 824
			if (!sym)
				goto out;

825
			spin_lock(&ci->i_ceph_lock);
S
Sage Weil 已提交
826 827 828 829 830
			if (!ci->i_symlink)
				ci->i_symlink = sym;
			else
				kfree(sym); /* lost a race */
		}
A
Al Viro 已提交
831
		inode->i_link = ci->i_symlink;
S
Sage Weil 已提交
832 833 834 835 836
		break;
	case S_IFDIR:
		inode->i_op = &ceph_dir_iops;
		inode->i_fop = &ceph_dir_fops;

837 838
		ci->i_dir_layout = iinfo->dir_layout;

S
Sage Weil 已提交
839 840 841 842 843 844 845 846 847 848 849 850 851 852 853
		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) {
854
			unsigned caps = le32_to_cpu(info->cap.caps);
S
Sage Weil 已提交
855 856
			ceph_add_cap(inode, session,
				     le64_to_cpu(info->cap.cap_id),
857
				     cap_fmode, caps,
S
Sage Weil 已提交
858 859 860 861
				     le32_to_cpu(info->cap.wanted),
				     le32_to_cpu(info->cap.seq),
				     le32_to_cpu(info->cap.mseq),
				     le64_to_cpu(info->cap.realm),
862
				     info->cap.flags, &new_cap);
863 864 865 866 867 868 869 870

			/* 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
871
				i_size_write(inode, 0);
872
				__ceph_dir_set_complete(ci,
Y
Yan, Zheng 已提交
873 874
					atomic64_read(&ci->i_release_count),
					atomic64_read(&ci->i_ordered_count));
875 876
			}

877
			wake = true;
S
Sage Weil 已提交
878 879 880 881 882 883 884
		} 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);
		}
885
	} else if (cap_fmode >= 0) {
886
		pr_warn("mds issued no caps on %llx.%llx\n",
887 888
			   ceph_vinop(inode));
		__ceph_get_fmode(ci, cap_fmode);
S
Sage Weil 已提交
889
	}
Y
Yan, Zheng 已提交
890 891 892 893 894 895

	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 &&
896 897
		    (locked_page ||
		     (le32_to_cpu(info->cap.caps) & cache_caps)))
Y
Yan, Zheng 已提交
898 899 900
			fill_inline = true;
	}

901
	spin_unlock(&ci->i_ceph_lock);
S
Sage Weil 已提交
902

Y
Yan, Zheng 已提交
903
	if (fill_inline)
904
		ceph_fill_inline_data(inode, locked_page,
Y
Yan, Zheng 已提交
905 906
				      iinfo->inline_data, iinfo->inline_len);

907 908 909
	if (wake)
		wake_up_all(&ci->i_cap_wq);

S
Sage Weil 已提交
910 911
	/* queue truncate if we saw i_size decrease */
	if (queue_trunc)
912
		ceph_queue_vmtruncate(inode);
S
Sage Weil 已提交
913 914

	/* populate frag tree */
915 916
	if (S_ISDIR(inode->i_mode))
		ceph_fill_fragtree(inode, &info->fragtree, dirinfo);
S
Sage Weil 已提交
917 918 919 920 921 922 923

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

	err = 0;
out:
924 925
	if (new_cap)
		ceph_put_cap(mdsc, new_cap);
S
Sage Weil 已提交
926 927
	if (xattr_blob)
		ceph_buffer_put(xattr_blob);
S
Sage Weil 已提交
928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949
	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;

	/* only track leases on regular dentries */
	if (dentry->d_op != &ceph_dentry_ops)
		return;

	spin_lock(&dentry->d_lock);
S
Sage Weil 已提交
950 951
	dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
	     dentry, duration, ttl);
S
Sage Weil 已提交
952 953

	/* make lease_rdcache_gen match directory */
954
	dir = d_inode(dentry->d_parent);
S
Sage Weil 已提交
955 956
	di->lease_shared_gen = ceph_inode(dir)->i_shared_gen;

S
Sage Weil 已提交
957
	if (duration == 0)
S
Sage Weil 已提交
958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984
		goto out_unlock;

	if (di->lease_gen == session->s_cap_gen &&
	    time_before(ttl, dentry->d_time))
		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;
	dentry->d_time = ttl;
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.
 */
985
static struct dentry *splice_dentry(struct dentry *dn, struct inode *in)
S
Sage Weil 已提交
986 987 988
{
	struct dentry *realdn;

989
	BUG_ON(d_inode(dn));
S
Sage Weil 已提交
990

S
Sage Weil 已提交
991 992 993
	/* dn must be unhashed */
	if (!d_unhashed(dn))
		d_drop(dn);
994
	realdn = d_splice_alias(in, dn);
S
Sage Weil 已提交
995
	if (IS_ERR(realdn)) {
996 997
		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
998 999 1000 1001 1002
		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
1003 1004
		     dn, d_count(dn),
		     realdn, d_count(realdn),
1005
		     d_inode(realdn), ceph_vinop(d_inode(realdn)));
S
Sage Weil 已提交
1006 1007 1008 1009 1010
		dput(dn);
		dn = realdn;
	} else {
		BUG_ON(!ceph_dentry(dn));
		dout("dn %p attached to %p ino %llx.%llx\n",
1011
		     dn, d_inode(dn), ceph_vinop(d_inode(dn)));
S
Sage Weil 已提交
1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033
	}
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;
1034
	struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
S
Sage Weil 已提交
1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075
	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");
1076 1077
		if (rinfo->head->result == 0 && req->r_locked_dir)
			ceph_invalidate_dir_request(req);
S
Sage Weil 已提交
1078 1079 1080 1081
		return 0;
	}

	if (rinfo->head->is_dentry) {
1082 1083
		struct inode *dir = req->r_locked_dir;

1084
		if (dir) {
1085 1086
			err = fill_inode(dir, NULL,
					 &rinfo->diri, rinfo->dirfrag,
1087 1088 1089
					 session, req->r_request_started, -1,
					 &req->r_caps_reservation);
			if (err < 0)
1090
				goto done;
1091 1092 1093
		} else {
			WARN_ON_ONCE(1);
		}
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129

		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;
			dname.hash = full_name_hash(dname.name, dname.len);
			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;
				}
				err = ceph_init_dentry(dn);
				if (err < 0) {
					dput(dn);
					dput(parent);
					goto done;
				}
1130 1131 1132
			} else if (d_really_is_positive(dn) &&
				   (ceph_ino(d_inode(dn)) != vino.ino ||
				    ceph_snap(d_inode(dn)) != vino.snap)) {
1133
				dout(" dn %p points to wrong inode %p\n",
1134
				     dn, d_inode(dn));
1135 1136 1137 1138 1139 1140 1141 1142
				d_delete(dn);
				dput(dn);
				goto retry_lookup;
			}

			req->r_dentry = dn;
			dput(parent);
		}
1143 1144
	}

1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155
	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;

1156
		err = fill_inode(in, req->r_locked_page, &rinfo->targeti, NULL,
1157
				session, req->r_request_started,
1158
				(!req->r_aborted && rinfo->head->result == 0) ?
1159 1160 1161 1162 1163 1164 1165 1166 1167
				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;
		}
	}

1168 1169 1170 1171 1172
	/*
	 * 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 &&
1173
	    req->r_locked_dir &&
1174
	    (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
1175
					       fsc->mount_options->snapdir_name,
1176
					       req->r_dentry->d_name.len))) {
S
Sage Weil 已提交
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187
		/*
		 * 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);
1188
		BUG_ON(d_inode(dn->d_parent) != dir);
S
Sage Weil 已提交
1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200
		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
1201
			le32_to_cpu(rinfo->dlease->duration_ms);
S
Sage Weil 已提交
1202 1203 1204 1205 1206
		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) {
1207 1208 1209
			struct inode *olddir = req->r_old_dentry_dir;
			BUG_ON(!olddir);

A
Al Viro 已提交
1210
			dout(" src %p '%pd' dst %p '%pd'\n",
S
Sage Weil 已提交
1211
			     req->r_old_dentry,
A
Al Viro 已提交
1212 1213
			     req->r_old_dentry,
			     dn, dn);
S
Sage Weil 已提交
1214 1215
			dout("fill_trace doing d_move %p -> %p\n",
			     req->r_old_dentry, dn);
S
Sage Weil 已提交
1216

Y
Yan, Zheng 已提交
1217 1218 1219 1220
			/* d_move screws up sibling dentries' offsets */
			ceph_dir_clear_ordered(dir);
			ceph_dir_clear_ordered(olddir);

S
Sage Weil 已提交
1221
			d_move(req->r_old_dentry, dn);
A
Al Viro 已提交
1222 1223
			dout(" src %p '%pd' dst %p '%pd'\n",
			     req->r_old_dentry,
S
Sage Weil 已提交
1224
			     req->r_old_dentry,
A
Al Viro 已提交
1225
			     dn, dn);
1226

1227 1228
			/* ensure target dentry is invalidated, despite
			   rehashing bug in vfs_rename_dir */
1229 1230
			ceph_invalidate_dentry_lease(dn);

1231
			dout("dn %p gets new offset %lld\n", req->r_old_dentry,
S
Sage Weil 已提交
1232
			     ceph_dentry(req->r_old_dentry)->offset);
1233

S
Sage Weil 已提交
1234 1235 1236 1237 1238 1239
			dn = req->r_old_dentry;  /* use old_dentry */
		}

		/* null dentry? */
		if (!rinfo->head->is_target) {
			dout("fill_trace null dentry\n");
1240
			if (d_really_is_positive(dn)) {
1241
				ceph_dir_clear_ordered(dir);
S
Sage Weil 已提交
1242 1243 1244 1245
				dout("d_delete %p\n", dn);
				d_delete(dn);
			} else {
				if (have_lease && d_unhashed(dn))
1246
					d_add(dn, NULL);
S
Sage Weil 已提交
1247 1248 1249 1250 1251 1252 1253 1254
				update_dentry_lease(dn, rinfo->dlease,
						    session,
						    req->r_request_started);
			}
			goto done;
		}

		/* attach proper inode */
1255
		if (d_really_is_negative(dn)) {
1256
			ceph_dir_clear_ordered(dir);
1257
			ihold(in);
1258
			dn = splice_dentry(dn, in);
S
Sage Weil 已提交
1259 1260 1261 1262 1263
			if (IS_ERR(dn)) {
				err = PTR_ERR(dn);
				goto done;
			}
			req->r_dentry = dn;  /* may have spliced */
1264
		} else if (d_really_is_positive(dn) && d_inode(dn) != in) {
S
Sage Weil 已提交
1265
			dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
1266
			     dn, d_inode(dn), ceph_vinop(d_inode(dn)),
1267
			     ceph_vinop(in));
1268
			d_invalidate(dn);
S
Sage Weil 已提交
1269 1270 1271 1272 1273 1274 1275
			have_lease = false;
		}

		if (have_lease)
			update_dentry_lease(dn, rinfo->dlease, session,
					    req->r_request_started);
		dout(" final dn %p\n", dn);
1276 1277 1278
	} 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
1279
		struct dentry *dn = req->r_dentry;
1280
		struct inode *dir = req->r_locked_dir;
S
Sage Weil 已提交
1281 1282 1283

		/* fill out a snapdir LOOKUPSNAP dentry */
		BUG_ON(!dn);
1284 1285
		BUG_ON(!dir);
		BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR);
S
Sage Weil 已提交
1286
		dout(" linking snapped dir %p to dn %p\n", in, dn);
1287
		ceph_dir_clear_ordered(dir);
1288
		ihold(in);
1289
		dn = splice_dentry(dn, in);
S
Sage Weil 已提交
1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303
		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.
 */
1304 1305 1306 1307 1308 1309 1310
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++) {
1311
		struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
1312 1313 1314 1315
		struct ceph_vino vino;
		struct inode *in;
		int rc;

1316 1317
		vino.ino = le64_to_cpu(rde->inode.in->ino);
		vino.snap = le64_to_cpu(rde->inode.in->snapid);
1318 1319 1320 1321 1322 1323 1324

		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;
		}
1325
		rc = fill_inode(in, NULL, &rde->inode, NULL, session,
1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337
				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;
			continue;
		}
	}

	return err;
}

Y
Yan, Zheng 已提交
1338 1339 1340 1341
void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl)
{
	if (ctl->page) {
		kunmap(ctl->page);
1342
		put_page(ctl->page);
Y
Yan, Zheng 已提交
1343 1344 1345 1346 1347 1348 1349 1350 1351
		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);
1352
	unsigned nsize = PAGE_SIZE / sizeof(struct dentry*);
Y
Yan, Zheng 已提交
1353 1354 1355 1356 1357
	unsigned idx = ctl->index % nsize;
	pgoff_t pgoff = ctl->index / nsize;

	if (!ctl->page || pgoff != page_index(ctl->page)) {
		ceph_readdir_cache_release(ctl);
1358 1359 1360 1361
		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
1362 1363
		if (!ctl->page) {
			ctl->index = -1;
1364
			return idx == 0 ? -ENOMEM : 0;
Y
Yan, Zheng 已提交
1365 1366 1367 1368 1369
		}
		/* reading/filling the cache are serialized by
		 * i_mutex, no need to use page lock */
		unlock_page(ctl->page);
		ctl->dentries = kmap(ctl->page);
1370
		if (idx == 0)
1371
			memset(ctl->dentries, 0, PAGE_SIZE);
Y
Yan, Zheng 已提交
1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385
	}

	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
1386 1387 1388 1389
int ceph_readdir_prepopulate(struct ceph_mds_request *req,
			     struct ceph_mds_session *session)
{
	struct dentry *parent = req->r_dentry;
1390
	struct ceph_inode_info *ci = ceph_inode(d_inode(parent));
S
Sage Weil 已提交
1391 1392 1393 1394
	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
1395
	int err = 0, skipped = 0, ret, i;
S
Sage Weil 已提交
1396 1397
	struct inode *snapdir = NULL;
	struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
1398
	u32 frag = le32_to_cpu(rhead->args.readdir.frag);
1399 1400
	u32 last_hash = 0;
	u32 fpos_offset;
Y
Yan, Zheng 已提交
1401 1402 1403 1404
	struct ceph_readdir_cache_control cache_ctl = {};

	if (req->r_aborted)
		return readdir_prepopulate_inodes_only(req, session);
1405

1406 1407 1408 1409 1410 1411
	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);
	}

1412 1413 1414 1415 1416
	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);
1417 1418
		if (!rinfo->hash_order)
			req->r_readdir_offset = 2;
1419
	}
S
Sage Weil 已提交
1420 1421

	if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
1422
		snapdir = ceph_get_snapdir(d_inode(parent));
S
Sage Weil 已提交
1423 1424 1425 1426 1427 1428 1429
		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)
1430
			ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
S
Sage Weil 已提交
1431 1432
	}

Y
Yan, Zheng 已提交
1433 1434 1435 1436 1437 1438 1439 1440 1441
	if (ceph_frag_is_leftmost(frag) && req->r_readdir_offset == 2) {
		/* 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;
1442
	fpos_offset = req->r_readdir_offset;
Y
Yan, Zheng 已提交
1443

1444
	/* FIXME: release caps/leases if error occurs */
S
Sage Weil 已提交
1445
	for (i = 0; i < rinfo->dir_nr; i++) {
1446
		struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
S
Sage Weil 已提交
1447 1448
		struct ceph_vino vino;

1449 1450
		dname.name = rde->name;
		dname.len = rde->name_len;
S
Sage Weil 已提交
1451 1452
		dname.hash = full_name_hash(dname.name, dname.len);

1453 1454
		vino.ino = le64_to_cpu(rde->inode.in->ino);
		vino.snap = le64_to_cpu(rde->inode.in->snapid);
S
Sage Weil 已提交
1455

1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467
		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
1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481
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;
			}
1482 1483
			ret = ceph_init_dentry(dn);
			if (ret < 0) {
1484
				dput(dn);
1485
				err = ret;
S
Sage Weil 已提交
1486
				goto out;
1487
			}
1488 1489 1490
		} 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
1491
			dout(" dn %p points to wrong inode %p\n",
1492
			     dn, d_inode(dn));
S
Sage Weil 已提交
1493 1494 1495 1496 1497 1498
			d_delete(dn);
			dput(dn);
			goto retry_lookup;
		}

		/* inode */
1499 1500
		if (d_really_is_positive(dn)) {
			in = d_inode(dn);
S
Sage Weil 已提交
1501 1502
		} else {
			in = ceph_get_inode(parent->d_sb, vino);
1503
			if (IS_ERR(in)) {
S
Sage Weil 已提交
1504
				dout("new_inode badness\n");
1505
				d_drop(dn);
S
Sage Weil 已提交
1506
				dput(dn);
1507
				err = PTR_ERR(in);
S
Sage Weil 已提交
1508 1509 1510 1511
				goto out;
			}
		}

1512
		ret = fill_inode(in, NULL, &rde->inode, NULL, session,
Y
Yan, Zheng 已提交
1513 1514 1515
				 req->r_request_started, -1,
				 &req->r_caps_reservation);
		if (ret < 0) {
S
Sage Weil 已提交
1516
			pr_err("fill_inode badness on %p\n", in);
1517
			if (d_really_is_negative(dn))
1518 1519
				iput(in);
			d_drop(dn);
Y
Yan, Zheng 已提交
1520
			err = ret;
1521
			goto next_item;
S
Sage Weil 已提交
1522
		}
1523

1524
		if (d_really_is_negative(dn)) {
Y
Yan, Zheng 已提交
1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535
			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
1536 1537 1538
			if (IS_ERR(realdn)) {
				err = PTR_ERR(realdn);
				d_drop(dn);
1539 1540 1541
				dn = NULL;
				goto next_item;
			}
Y
Yan, Zheng 已提交
1542
			dn = realdn;
1543 1544
		}

1545
		ceph_dentry(dn)->offset = rde->offset;
1546

1547
		update_dentry_lease(dn, rde->lease, req->r_session,
1548
				    req->r_request_started);
Y
Yan, Zheng 已提交
1549

Y
Yan, Zheng 已提交
1550
		if (err == 0 && skipped == 0 && cache_ctl.index >= 0) {
Y
Yan, Zheng 已提交
1551 1552 1553 1554 1555
			ret = fill_readdir_cache(d_inode(parent), dn,
						 &cache_ctl, req);
			if (ret < 0)
				err = ret;
		}
1556 1557 1558
next_item:
		if (dn)
			dput(dn);
S
Sage Weil 已提交
1559 1560
	}
out:
Y
Yan, Zheng 已提交
1561
	if (err == 0 && skipped == 0) {
Y
Yan, Zheng 已提交
1562 1563 1564 1565
		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
1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578
	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;

1579
	spin_lock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1580
	dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
1581
	i_size_write(inode, size);
S
Sage Weil 已提交
1582 1583 1584 1585 1586 1587 1588
	inode->i_blocks = (size + (1 << 9) - 1) >> 9;

	/* 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;

1589
	spin_unlock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1590 1591 1592 1593 1594 1595 1596
	return ret;
}

/*
 * Write back inode data in a worker thread.  (This can't be done
 * in the message handler context.)
 */
1597 1598
void ceph_queue_writeback(struct inode *inode)
{
1599
	ihold(inode);
1600 1601
	if (queue_work(ceph_inode_to_client(inode)->wb_wq,
		       &ceph_inode(inode)->i_wb_work)) {
1602
		dout("ceph_queue_writeback %p\n", inode);
1603
	} else {
1604
		dout("ceph_queue_writeback %p failed\n", inode);
1605
		iput(inode);
1606 1607 1608 1609
	}
}

static void ceph_writeback_work(struct work_struct *work)
S
Sage Weil 已提交
1610 1611 1612 1613 1614 1615 1616 1617 1618 1619
{
	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);
}

1620 1621 1622 1623 1624
/*
 * queue an async invalidation
 */
void ceph_queue_invalidate(struct inode *inode)
{
1625
	ihold(inode);
1626 1627 1628 1629 1630
	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);
1631
		iput(inode);
1632 1633 1634
	}
}

S
Sage Weil 已提交
1635 1636 1637 1638
/*
 * Invalidate inode pages in a worker thread.  (This can't be done
 * in the message handler context.)
 */
1639
static void ceph_invalidate_work(struct work_struct *work)
S
Sage Weil 已提交
1640 1641 1642 1643
{
	struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
						  i_pg_inv_work);
	struct inode *inode = &ci->vfs_inode;
1644
	struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
S
Sage Weil 已提交
1645 1646 1647
	u32 orig_gen;
	int check = 0;

Y
Yan, Zheng 已提交
1648
	mutex_lock(&ci->i_truncate_mutex);
1649 1650 1651 1652 1653 1654 1655 1656 1657 1658

	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;
	}

1659
	spin_lock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1660 1661
	dout("invalidate_pages %p gen %d revoking %d\n", inode,
	     ci->i_rdcache_gen, ci->i_rdcache_revoking);
1662
	if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
Y
Yan, Zheng 已提交
1663 1664
		if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
			check = 1;
1665
		spin_unlock(&ci->i_ceph_lock);
Y
Yan, Zheng 已提交
1666
		mutex_unlock(&ci->i_truncate_mutex);
S
Sage Weil 已提交
1667 1668 1669
		goto out;
	}
	orig_gen = ci->i_rdcache_gen;
1670
	spin_unlock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1671

1672
	truncate_pagecache(inode, 0);
S
Sage Weil 已提交
1673

1674
	spin_lock(&ci->i_ceph_lock);
1675 1676
	if (orig_gen == ci->i_rdcache_gen &&
	    orig_gen == ci->i_rdcache_revoking) {
S
Sage Weil 已提交
1677 1678
		dout("invalidate_pages %p gen %d successful\n", inode,
		     ci->i_rdcache_gen);
1679
		ci->i_rdcache_revoking--;
S
Sage Weil 已提交
1680 1681
		check = 1;
	} else {
1682 1683 1684
		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
1685 1686
		if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
			check = 1;
S
Sage Weil 已提交
1687
	}
1688
	spin_unlock(&ci->i_ceph_lock);
Y
Yan, Zheng 已提交
1689
	mutex_unlock(&ci->i_truncate_mutex);
Y
Yan, Zheng 已提交
1690
out:
S
Sage Weil 已提交
1691 1692 1693 1694 1695 1696 1697
	if (check)
		ceph_check_caps(ci, 0, NULL);
	iput(inode);
}


/*
1698
 * called by trunc_wq;
S
Sage Weil 已提交
1699 1700 1701
 *
 * We also truncate in a separate thread as well.
 */
1702
static void ceph_vmtruncate_work(struct work_struct *work)
S
Sage Weil 已提交
1703 1704 1705 1706 1707 1708
{
	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
1709
	__ceph_do_pending_vmtruncate(inode);
S
Sage Weil 已提交
1710 1711 1712
	iput(inode);
}

1713 1714 1715 1716 1717 1718 1719 1720
/*
 * 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);

1721
	ihold(inode);
1722

1723
	if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq,
1724 1725 1726 1727 1728
		       &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);
1729
		iput(inode);
1730 1731 1732
	}
}

S
Sage Weil 已提交
1733 1734 1735 1736
/*
 * Make sure any pending truncation is applied before doing anything
 * that may depend on it.
 */
Y
Yan, Zheng 已提交
1737
void __ceph_do_pending_vmtruncate(struct inode *inode)
S
Sage Weil 已提交
1738 1739 1740
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	u64 to;
1741
	int wrbuffer_refs, finish = 0;
S
Sage Weil 已提交
1742

Y
Yan, Zheng 已提交
1743
	mutex_lock(&ci->i_truncate_mutex);
S
Sage Weil 已提交
1744
retry:
1745
	spin_lock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1746 1747
	if (ci->i_truncate_pending == 0) {
		dout("__do_pending_vmtruncate %p none pending\n", inode);
1748
		spin_unlock(&ci->i_ceph_lock);
Y
Yan, Zheng 已提交
1749
		mutex_unlock(&ci->i_truncate_mutex);
S
Sage Weil 已提交
1750 1751 1752 1753 1754 1755 1756 1757 1758 1759
		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);
1760
		spin_unlock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1761 1762 1763 1764 1765
		filemap_write_and_wait_range(&inode->i_data, 0,
					     inode->i_sb->s_maxbytes);
		goto retry;
	}

Y
Yan, Zheng 已提交
1766 1767 1768
	/* there should be no reader or writer */
	WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref);

S
Sage Weil 已提交
1769 1770 1771 1772
	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);
1773
	spin_unlock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1774

1775
	truncate_pagecache(inode, to);
S
Sage Weil 已提交
1776

1777
	spin_lock(&ci->i_ceph_lock);
1778 1779 1780 1781
	if (to == ci->i_truncate_size) {
		ci->i_truncate_pending = 0;
		finish = 1;
	}
1782
	spin_unlock(&ci->i_ceph_lock);
1783 1784
	if (!finish)
		goto retry;
S
Sage Weil 已提交
1785

Y
Yan, Zheng 已提交
1786 1787
	mutex_unlock(&ci->i_truncate_mutex);

S
Sage Weil 已提交
1788 1789
	if (wrbuffer_refs == 0)
		ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
1790 1791

	wake_up_all(&ci->i_cap_wq);
S
Sage Weil 已提交
1792 1793 1794 1795 1796 1797 1798
}

/*
 * symlinks
 */
static const struct inode_operations ceph_symlink_iops = {
	.readlink = generic_readlink,
1799
	.get_link = simple_get_link,
Y
Yan, Zheng 已提交
1800 1801 1802 1803 1804 1805
	.setattr = ceph_setattr,
	.getattr = ceph_getattr,
	.setxattr = ceph_setxattr,
	.getxattr = ceph_getxattr,
	.listxattr = ceph_listxattr,
	.removexattr = ceph_removexattr,
S
Sage Weil 已提交
1806 1807 1808 1809 1810 1811 1812
};

/*
 * setattr
 */
int ceph_setattr(struct dentry *dentry, struct iattr *attr)
{
1813
	struct inode *inode = d_inode(dentry);
S
Sage Weil 已提交
1814 1815 1816
	struct ceph_inode_info *ci = ceph_inode(inode);
	const unsigned int ia_valid = attr->ia_valid;
	struct ceph_mds_request *req;
1817
	struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc;
1818
	struct ceph_cap_flush *prealloc_cf;
S
Sage Weil 已提交
1819 1820 1821 1822
	int issued;
	int release = 0, dirtied = 0;
	int mask = 0;
	int err = 0;
1823
	int inode_dirty_flags = 0;
1824
	bool lock_snap_rwsem = false;
S
Sage Weil 已提交
1825 1826 1827 1828 1829 1830 1831 1832

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

	err = inode_change_ok(inode, attr);
	if (err != 0)
		return err;

1833 1834 1835 1836
	prealloc_cf = ceph_alloc_cap_flush();
	if (!prealloc_cf)
		return -ENOMEM;

S
Sage Weil 已提交
1837 1838
	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
				       USE_AUTH_MDS);
1839 1840
	if (IS_ERR(req)) {
		ceph_free_cap_flush(prealloc_cf);
S
Sage Weil 已提交
1841
		return PTR_ERR(req);
1842
	}
S
Sage Weil 已提交
1843

1844
	spin_lock(&ci->i_ceph_lock);
S
Sage Weil 已提交
1845
	issued = __ceph_caps_issued(ci, NULL);
1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857

	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
1858 1859 1860 1861
	dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));

	if (ia_valid & ATTR_UID) {
		dout("setattr %p uid %d -> %d\n", inode,
1862 1863
		     from_kuid(&init_user_ns, inode->i_uid),
		     from_kuid(&init_user_ns, attr->ia_uid));
S
Sage Weil 已提交
1864 1865 1866 1867
		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 ||
1868 1869 1870
			   !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
1871 1872 1873 1874 1875 1876
			mask |= CEPH_SETATTR_UID;
			release |= CEPH_CAP_AUTH_SHARED;
		}
	}
	if (ia_valid & ATTR_GID) {
		dout("setattr %p gid %d -> %d\n", inode,
1877 1878
		     from_kgid(&init_user_ns, inode->i_gid),
		     from_kgid(&init_user_ns, attr->ia_gid));
S
Sage Weil 已提交
1879 1880 1881 1882
		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 ||
1883 1884 1885
			   !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
1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897
			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
1898
			inode->i_mode = attr->ia_mode;
S
Sage Weil 已提交
1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953
			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) {
1954
			i_size_write(inode, attr->ia_size);
S
Sage Weil 已提交
1955 1956 1957 1958 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
			inode->i_blocks =
				(attr->ia_size + (1 << 9) - 1) >> 9;
			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) {
2000 2001
		inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied,
							   &prealloc_cf);
2002
		inode->i_ctime = current_fs_time(inode->i_sb);
S
Sage Weil 已提交
2003 2004 2005
	}

	release &= issued;
2006
	spin_unlock(&ci->i_ceph_lock);
2007 2008
	if (lock_snap_rwsem)
		up_read(&mdsc->snap_rwsem);
S
Sage Weil 已提交
2009

2010 2011 2012
	if (inode_dirty_flags)
		__mark_inode_dirty(inode, inode_dirty_flags);

G
Guangliang Zhao 已提交
2013
	if (ia_valid & ATTR_MODE) {
2014
		err = posix_acl_chmod(inode, attr->ia_mode);
G
Guangliang Zhao 已提交
2015 2016 2017 2018
		if (err)
			goto out_put;
	}

S
Sage Weil 已提交
2019
	if (mask) {
2020 2021
		req->r_inode = inode;
		ihold(inode);
S
Sage Weil 已提交
2022 2023 2024
		req->r_inode_drop = release;
		req->r_args.setattr.mask = cpu_to_le32(mask);
		req->r_num_caps = 1;
2025
		err = ceph_mdsc_do_request(mdsc, NULL, req);
S
Sage Weil 已提交
2026 2027 2028 2029 2030
	}
	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
2031 2032
	if (mask & CEPH_SETATTR_SIZE)
		__ceph_do_pending_vmtruncate(inode);
2033
	ceph_free_cap_flush(prealloc_cf);
S
Sage Weil 已提交
2034
	return err;
G
Guangliang Zhao 已提交
2035
out_put:
S
Sage Weil 已提交
2036
	ceph_mdsc_put_request(req);
2037
	ceph_free_cap_flush(prealloc_cf);
S
Sage Weil 已提交
2038 2039 2040 2041 2042 2043 2044
	return err;
}

/*
 * Verify that we have a lease on the given mask.  If not,
 * do a getattr against an mds.
 */
2045 2046
int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
		      int mask, bool force)
S
Sage Weil 已提交
2047
{
2048 2049
	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
2050 2051 2052 2053 2054 2055 2056 2057
	struct ceph_mds_request *req;
	int err;

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

2058 2059
	dout("do_getattr inode %p mask %s mode 0%o\n",
	     inode, ceph_cap_string(mask), inode->i_mode);
2060
	if (!force && ceph_caps_issued_mask(ceph_inode(inode), mask, 1))
S
Sage Weil 已提交
2061 2062 2063 2064 2065
		return 0;

	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
	if (IS_ERR(req))
		return PTR_ERR(req);
2066 2067
	req->r_inode = inode;
	ihold(inode);
S
Sage Weil 已提交
2068 2069
	req->r_num_caps = 1;
	req->r_args.getattr.mask = cpu_to_le32(mask);
2070
	req->r_locked_page = locked_page;
S
Sage Weil 已提交
2071
	err = ceph_mdsc_do_request(mdsc, NULL, req);
2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082
	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
2083 2084 2085 2086 2087 2088 2089 2090 2091 2092
	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.
 */
2093
int ceph_permission(struct inode *inode, int mask)
S
Sage Weil 已提交
2094
{
2095 2096
	int err;

2097
	if (mask & MAY_NOT_BLOCK)
2098 2099
		return -ECHILD;

2100
	err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false);
S
Sage Weil 已提交
2101 2102

	if (!err)
2103
		err = generic_permission(inode, mask);
S
Sage Weil 已提交
2104 2105 2106 2107 2108 2109 2110 2111 2112 2113
	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)
{
2114
	struct inode *inode = d_inode(dentry);
2115
	struct ceph_inode_info *ci = ceph_inode(inode);
S
Sage Weil 已提交
2116 2117
	int err;

2118
	err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL, false);
S
Sage Weil 已提交
2119 2120
	if (!err) {
		generic_fillattr(inode, stat);
Y
Yehuda Sadeh 已提交
2121
		stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
S
Sage Weil 已提交
2122 2123 2124 2125
		if (ceph_snap(inode) != CEPH_NOSNAP)
			stat->dev = ceph_snap(inode);
		else
			stat->dev = 0;
2126
		if (S_ISDIR(inode->i_mode)) {
2127 2128 2129 2130 2131
			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;
2132
			stat->blocks = 0;
S
Sage Weil 已提交
2133
			stat->blksize = 65536;
2134
		}
S
Sage Weil 已提交
2135 2136 2137
	}
	return err;
}