leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

Browse Source 
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: select CRYPTO
  ceph: check mapping to determine if FILE_CACHE cap is used
  ceph: only send one flushsnap per cap_snap per mds session
  ceph: fix cap_snap and realm split
  ceph: stop sending FLUSHSNAPs when we hit a dirty capsnap
  ceph: correctly set 'follows' in flushsnap messages
  ceph: fix dn offset during readdir_prepopulate
  ceph: fix file offset wrapping at 4GB on 32-bit archs
  ceph: fix reconnect encoding for old servers
  ceph: fix pagelist kunmap tail
  ceph: fix null pointer deref on anon root dentry release
This commit is contained in:
Linus Torvalds 2010-09-21 11:20:10 -07:00
commit 19746cad00
9 changed files with 84 additions and 83 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
fs/ceph/Kconfig
View File

@ -3,6 +3,7 @@ config CEPH_FS
depends on INET && EXPERIMENTAL
select LIBCRC32C
select CRYPTO_AES
select CRYPTO
help
Choose Y or M here to include support for mounting the
experimental Ceph distributed file system. Ceph is an extremely

7
fs/ceph/addr.c
View File

@ -411,8 +411,8 @@ static int writepage_nounlock(struct page *page, struct writeback_control *wbc)
if (i_size < page_off + len)
len = i_size - page_off;
dout("writepage %p page %p index %lu on %llu~%u\n",
inode, page, page->index, page_off, len);
dout("writepage %p page %p index %lu on %llu~%u snapc %p\n",
inode, page, page->index, page_off, len, snapc);
writeback_stat = atomic_long_inc_return(&client->writeback_count);
if (writeback_stat >
@ -766,7 +766,8 @@ get_more_pages:
/* ok */
if (locked_pages == 0) {
/* prepare async write request */
offset = page->index << PAGE_CACHE_SHIFT;
offset = (unsigned long long)page->index
<< PAGE_CACHE_SHIFT;
len = wsize;
req = ceph_osdc_new_request(&client->osdc,
&ci->i_layout,

27
fs/ceph/caps.c
View File

@ -814,7 +814,7 @@ int __ceph_caps_used(struct ceph_inode_info *ci)
used |= CEPH_CAP_PIN;
if (ci->i_rd_ref)
used |= CEPH_CAP_FILE_RD;
if (ci->i_rdcache_ref || ci->i_rdcache_gen)
if (ci->i_rdcache_ref || ci->vfs_inode.i_data.nrpages)
used |= CEPH_CAP_FILE_CACHE;
if (ci->i_wr_ref)
used |= CEPH_CAP_FILE_WR;
@ -1195,10 +1195,14 @@ static int __send_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap,
* asynchronously back to the MDS once sync writes complete and dirty
* data is written out.
*
* Unless @again is true, skip cap_snaps that were already sent to
* the MDS (i.e., during this session).
*
* Called under i_lock. Takes s_mutex as needed.
*/
void __ceph_flush_snaps(struct ceph_inode_info *ci,
struct ceph_mds_session **psession)
struct ceph_mds_session **psession,
int again)
__releases(ci->vfs_inode->i_lock)
__acquires(ci->vfs_inode->i_lock)
{
@ -1227,7 +1231,7 @@ retry:
* pages to be written out.
*/
if (capsnap->dirty_pages || capsnap->writing)
continue;
break;
/*
* if cap writeback already occurred, we should have dropped
@ -1240,6 +1244,13 @@ retry:
dout("no auth cap (migrating?), doing nothing\n");
goto out;
}
/* only flush each capsnap once */
if (!again && !list_empty(&capsnap->flushing_item)) {
dout("already flushed %p, skipping\n", capsnap);
continue;
}
mds = ci->i_auth_cap->session->s_mds;
mseq = ci->i_auth_cap->mseq;
@ -1276,8 +1287,8 @@ retry:
&session->s_cap_snaps_flushing);
spin_unlock(&inode->i_lock);
dout("flush_snaps %p cap_snap %p follows %lld size %llu\n",
inode, capsnap, next_follows, capsnap->size);
dout("flush_snaps %p cap_snap %p follows %lld tid %llu\n",
inode, capsnap, capsnap->follows, capsnap->flush_tid);
send_cap_msg(session, ceph_vino(inode).ino, 0,
CEPH_CAP_OP_FLUSHSNAP, capsnap->issued, 0,
capsnap->dirty, 0, capsnap->flush_tid, 0, mseq,
@ -1314,7 +1325,7 @@ static void ceph_flush_snaps(struct ceph_inode_info *ci)
struct inode *inode = &ci->vfs_inode;
spin_lock(&inode->i_lock);
__ceph_flush_snaps(ci, NULL);
__ceph_flush_snaps(ci, NULL, 0);
spin_unlock(&inode->i_lock);
}
@ -1477,7 +1488,7 @@ void ceph_check_caps(struct ceph_inode_info *ci, int flags,
/* flush snaps first time around only */
if (!list_empty(&ci->i_cap_snaps))
__ceph_flush_snaps(ci, &session);
__ceph_flush_snaps(ci, &session, 0);
goto retry_locked;
retry:
spin_lock(&inode->i_lock);
@ -1894,7 +1905,7 @@ static void kick_flushing_capsnaps(struct ceph_mds_client *mdsc,
if (cap && cap->session == session) {
dout("kick_flushing_caps %p cap %p capsnap %p\n", inode,
cap, capsnap);
__ceph_flush_snaps(ci, &session);
__ceph_flush_snaps(ci, &session, 1);
} else {
pr_err("%p auth cap %p not mds%d ???\n", inode,
cap, session->s_mds);

10
fs/ceph/dir.c
View File

@ -1021,11 +1021,15 @@ out_touch:
static void ceph_dentry_release(struct dentry *dentry)
{
struct ceph_dentry_info *di = ceph_dentry(dentry);
struct inode *parent_inode = dentry->d_parent->d_inode;
u64 snapid = ceph_snap(parent_inode);
struct inode *parent_inode = NULL;
u64 snapid = CEPH_NOSNAP;
if (!IS_ROOT(dentry)) {
parent_inode = dentry->d_parent->d_inode;
if (parent_inode)
snapid = ceph_snap(parent_inode);
}
dout("dentry_release %p parent %p\n", dentry, parent_inode);
if (parent_inode && snapid != CEPH_SNAPDIR) {
struct ceph_inode_info *ci = ceph_inode(parent_inode);

11
fs/ceph/inode.c
View File

@ -845,7 +845,7 @@ static void ceph_set_dentry_offset(struct dentry *dn)
* the caller) if we fail.
*/
static struct dentry *splice_dentry(struct dentry *dn, struct inode *in,
bool *prehash)
bool *prehash, bool set_offset)
{
struct dentry *realdn;
@ -877,7 +877,8 @@ static struct dentry *splice_dentry(struct dentry *dn, struct inode *in,
}
if ((!prehash || *prehash) && d_unhashed(dn))
d_rehash(dn);
ceph_set_dentry_offset(dn);
if (set_offset)
ceph_set_dentry_offset(dn);
out:
return dn;
}
@ -1062,7 +1063,7 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
d_delete(dn);
goto done;
}
dn = splice_dentry(dn, in, &have_lease);
dn = splice_dentry(dn, in, &have_lease, true);
if (IS_ERR(dn)) {
err = PTR_ERR(dn);
goto done;
@ -1105,7 +1106,7 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
goto done;
}
dout(" linking snapped dir %p to dn %p\n", in, dn);
dn = splice_dentry(dn, in, NULL);
dn = splice_dentry(dn, in, NULL, true);
if (IS_ERR(dn)) {
err = PTR_ERR(dn);
goto done;
@ -1237,7 +1238,7 @@ retry_lookup:
err = PTR_ERR(in);
goto out;
}
dn = splice_dentry(dn, in, NULL);
dn = splice_dentry(dn, in, NULL, false);
if (IS_ERR(dn))
dn = NULL;
}

2
fs/ceph/mds_client.c
View File

@ -2374,6 +2374,8 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
num_fcntl_locks,
num_flock_locks);
unlock_kernel();
} else {
err = ceph_pagelist_append(pagelist, &rec, reclen);
}
out_free:

12
fs/ceph/pagelist.c
View File

@ -5,10 +5,18 @@
#include "pagelist.h"
static void ceph_pagelist_unmap_tail(struct ceph_pagelist *pl)
{
struct page *page = list_entry(pl->head.prev, struct page,
lru);
kunmap(page);
}
int ceph_pagelist_release(struct ceph_pagelist *pl)
{
if (pl->mapped_tail)
kunmap(pl->mapped_tail);
ceph_pagelist_unmap_tail(pl);
while (!list_empty(&pl->head)) {
struct page *page = list_first_entry(&pl->head, struct page,
lru);
@ -26,7 +34,7 @@ static int ceph_pagelist_addpage(struct ceph_pagelist *pl)
pl->room += PAGE_SIZE;
list_add_tail(&page->lru, &pl->head);
if (pl->mapped_tail)
kunmap(pl->mapped_tail);
ceph_pagelist_unmap_tail(pl);
pl->mapped_tail = kmap(page);
return 0;
}

92
fs/ceph/snap.c
View File

@ -119,6 +119,7 @@ static struct ceph_snap_realm *ceph_create_snap_realm(
INIT_LIST_HEAD(&realm->children);
INIT_LIST_HEAD(&realm->child_item);
INIT_LIST_HEAD(&realm->empty_item);
INIT_LIST_HEAD(&realm->dirty_item);
INIT_LIST_HEAD(&realm->inodes_with_caps);
spin_lock_init(&realm->inodes_with_caps_lock);
__insert_snap_realm(&mdsc->snap_realms, realm);
@ -467,7 +468,7 @@ void ceph_queue_cap_snap(struct ceph_inode_info *ci)
INIT_LIST_HEAD(&capsnap->ci_item);
INIT_LIST_HEAD(&capsnap->flushing_item);
capsnap->follows = snapc->seq - 1;
capsnap->follows = snapc->seq;
capsnap->issued = __ceph_caps_issued(ci, NULL);
capsnap->dirty = dirty;
@ -604,6 +605,7 @@ int ceph_update_snap_trace(struct ceph_mds_client *mdsc,
struct ceph_snap_realm *realm;
int invalidate = 0;
int err = -ENOMEM;
LIST_HEAD(dirty_realms);
dout("update_snap_trace deletion=%d\n", deletion);
more:
@ -626,24 +628,6 @@ more:
}
}
if (le64_to_cpu(ri->seq) > realm->seq) {
dout("update_snap_trace updating %llx %p %lld -> %lld\n",
realm->ino, realm, realm->seq, le64_to_cpu(ri->seq));
/*
* if the realm seq has changed, queue a cap_snap for every
* inode with open caps. we do this _before_ we update
* the realm info so that we prepare for writeback under the
* _previous_ snap context.
*
* ...unless it's a snap deletion!
*/
if (!deletion)
queue_realm_cap_snaps(realm);
} else {
dout("update_snap_trace %llx %p seq %lld unchanged\n",
realm->ino, realm, realm->seq);
}
/* ensure the parent is correct */
err = adjust_snap_realm_parent(mdsc, realm, le64_to_cpu(ri->parent));
if (err < 0)
@ -651,6 +635,8 @@ more:
invalidate += err;
if (le64_to_cpu(ri->seq) > realm->seq) {
dout("update_snap_trace updating %llx %p %lld -> %lld\n",
realm->ino, realm, realm->seq, le64_to_cpu(ri->seq));
/* update realm parameters, snap lists */
realm->seq = le64_to_cpu(ri->seq);
realm->created = le64_to_cpu(ri->created);
@ -668,9 +654,17 @@ more:
if (err < 0)
goto fail;
/* queue realm for cap_snap creation */
list_add(&realm->dirty_item, &dirty_realms);
invalidate = 1;
} else if (!realm->cached_context) {
dout("update_snap_trace %llx %p seq %lld new\n",
realm->ino, realm, realm->seq);
invalidate = 1;
} else {
dout("update_snap_trace %llx %p seq %lld unchanged\n",
realm->ino, realm, realm->seq);
}
dout("done with %llx %p, invalidated=%d, %p %p\n", realm->ino,
@ -683,6 +677,14 @@ more:
if (invalidate)
rebuild_snap_realms(realm);
/*
* queue cap snaps _after_ we've built the new snap contexts,
* so that i_head_snapc can be set appropriately.
*/
list_for_each_entry(realm, &dirty_realms, dirty_item) {
queue_realm_cap_snaps(realm);
}
__cleanup_empty_realms(mdsc);
return 0;
@ -715,7 +717,7 @@ static void flush_snaps(struct ceph_mds_client *mdsc)
igrab(inode);
spin_unlock(&mdsc->snap_flush_lock);
spin_lock(&inode->i_lock);
__ceph_flush_snaps(ci, &session);
__ceph_flush_snaps(ci, &session, 0);
spin_unlock(&inode->i_lock);
iput(inode);
spin_lock(&mdsc->snap_flush_lock);
@ -816,6 +818,7 @@ void ceph_handle_snap(struct ceph_mds_client *mdsc,
};
struct inode *inode = ceph_find_inode(sb, vino);
struct ceph_inode_info *ci;
struct ceph_snap_realm *oldrealm;
if (!inode)
continue;
@ -841,18 +844,19 @@ void ceph_handle_snap(struct ceph_mds_client *mdsc,
dout(" will move %p to split realm %llx %p\n",
inode, realm->ino, realm);
/*
* Remove the inode from the realm's inode
* list, but don't add it to the new realm
* yet. We don't want the cap_snap to be
* queued (again) by ceph_update_snap_trace()
* below. Queue it _now_, under the old context.
* Move the inode to the new realm
*/
spin_lock(&realm->inodes_with_caps_lock);
list_del_init(&ci->i_snap_realm_item);
list_add(&ci->i_snap_realm_item,
&realm->inodes_with_caps);
oldrealm = ci->i_snap_realm;
ci->i_snap_realm = realm;
spin_unlock(&realm->inodes_with_caps_lock);
spin_unlock(&inode->i_lock);
ceph_queue_cap_snap(ci);
ceph_get_snap_realm(mdsc, realm);
ceph_put_snap_realm(mdsc, oldrealm);
iput(inode);
continue;
@ -880,43 +884,9 @@ skip_inode:
ceph_update_snap_trace(mdsc, p, e,
op == CEPH_SNAP_OP_DESTROY);
if (op == CEPH_SNAP_OP_SPLIT) {
/*
* ok, _now_ add the inodes into the new realm.
*/
for (i = 0; i < num_split_inos; i++) {
struct ceph_vino vino = {
.ino = le64_to_cpu(split_inos[i]),
.snap = CEPH_NOSNAP,
};
struct inode *inode = ceph_find_inode(sb, vino);
struct ceph_inode_info *ci;
if (!inode)
continue;
ci = ceph_inode(inode);
spin_lock(&inode->i_lock);
if (list_empty(&ci->i_snap_realm_item)) {
struct ceph_snap_realm *oldrealm =
ci->i_snap_realm;
dout(" moving %p to split realm %llx %p\n",
inode, realm->ino, realm);
spin_lock(&realm->inodes_with_caps_lock);
list_add(&ci->i_snap_realm_item,
&realm->inodes_with_caps);
ci->i_snap_realm = realm;
spin_unlock(&realm->inodes_with_caps_lock);
ceph_get_snap_realm(mdsc, realm);
ceph_put_snap_realm(mdsc, oldrealm);
}
spin_unlock(&inode->i_lock);
iput(inode);
}
if (op == CEPH_SNAP_OP_SPLIT)
/* we took a reference when we created the realm, above */
ceph_put_snap_realm(mdsc, realm);
}
__cleanup_empty_realms(mdsc);

5
fs/ceph/super.h
View File

@ -690,6 +690,8 @@ struct ceph_snap_realm {
struct list_head empty_item; /* if i have ref==0 */
struct list_head dirty_item; /* if realm needs new context */
/* the current set of snaps for this realm */
struct ceph_snap_context *cached_context;
@ -826,7 +828,8 @@ extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
struct ceph_snap_context *snapc);
extern void __ceph_flush_snaps(struct ceph_inode_info *ci,
struct ceph_mds_session **psession);
struct ceph_mds_session **psession,
int again);
extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
struct ceph_mds_session *session);
extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc);