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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: ensure prealloc_blob is in place when removing xattr
  rbd: initialize snap_rwsem in rbd_add()
  ceph: enable/disable dentry complete flags via mount option
  vfs: export symbol d_find_any_alias()
  ceph: always initialize the dentry in open_root_dentry()
  libceph: remove useless return value for osd_client __send_request()
  ceph: avoid iput() while holding spinlock in ceph_dir_fsync
  ceph: avoid useless dget/dput in encode_fh
  ceph: dereference pointer after checking for NULL
  crush: fix force for non-root TAKE
  ceph: remove unnecessary d_fsdata conditional checks
  ceph: Use kmemdup rather than duplicating its implementation

Fix up conflicts in fs/ceph/super.c (d_alloc_root() failure handling vs
always initialize the dentry in open_root_dentry)
This commit is contained in:
Linus Torvalds 2012-01-13 10:29:21 -08:00
commit 1a52bb0b68
14 changed files with 128 additions and 67 deletions
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18
Documentation/filesystems/ceph.txt
View file

@ -119,12 +119,20 @@ Mount Options
must rely on TCP's error correction to detect data corruption
in the data payload.
noasyncreaddir
Disable client's use its local cache to satisfy readdir
requests. (This does not change correctness; the client uses
cached metadata only when a lease or capability ensures it is
valid.)
dcache
Use the dcache contents to perform negative lookups and
readdir when the client has the entire directory contents in
its cache. (This does not change correctness; the client uses
cached metadata only when a lease or capability ensures it is
valid.)
nodcache
Do not use the dcache as above. This avoids a significant amount of
complex code, sacrificing performance without affecting correctness,
and is useful for tracking down bugs.
noasyncreaddir
Do not use the dcache as above for readdir.
More Information
================

2
drivers/block/rbd.c
View file

@ -2184,6 +2184,8 @@ static ssize_t rbd_add(struct bus_type *bus,
INIT_LIST_HEAD(&rbd_dev->node);
INIT_LIST_HEAD(&rbd_dev->snaps);
init_rwsem(&rbd_dev->header.snap_rwsem);
/* generate unique id: find highest unique id, add one */
mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING);

76
fs/ceph/dir.c
View file

@ -973,7 +973,7 @@ static int dentry_lease_is_valid(struct dentry *dentry)
spin_lock(&dentry->d_lock);
di = ceph_dentry(dentry);
if (di && di->lease_session) {
if (di->lease_session) {
s = di->lease_session;
spin_lock(&s->s_cap_lock);
gen = s->s_cap_gen;
@ -1072,13 +1072,11 @@ static void ceph_d_release(struct dentry *dentry)
struct ceph_dentry_info *di = ceph_dentry(dentry);
dout("d_release %p\n", dentry);
if (di) {
ceph_dentry_lru_del(dentry);
if (di->lease_session)
ceph_put_mds_session(di->lease_session);
kmem_cache_free(ceph_dentry_cachep, di);
dentry->d_fsdata = NULL;
}
ceph_dentry_lru_del(dentry);
if (di->lease_session)
ceph_put_mds_session(di->lease_session);
kmem_cache_free(ceph_dentry_cachep, di);
dentry->d_fsdata = NULL;
}
static int ceph_snapdir_d_revalidate(struct dentry *dentry,
@ -1096,17 +1094,36 @@ static int ceph_snapdir_d_revalidate(struct dentry *dentry,
*/
void ceph_dir_set_complete(struct inode *inode)
{
/* not yet implemented */
struct dentry *dentry = d_find_any_alias(inode);
if (dentry && ceph_dentry(dentry) &&
ceph_test_mount_opt(ceph_sb_to_client(dentry->d_sb), DCACHE)) {
dout(" marking %p (%p) complete\n", inode, dentry);
set_bit(CEPH_D_COMPLETE, &ceph_dentry(dentry)->flags);
}
dput(dentry);
}
void ceph_dir_clear_complete(struct inode *inode)
{
/* not yet implemented */
struct dentry *dentry = d_find_any_alias(inode);
if (dentry && ceph_dentry(dentry)) {
dout(" marking %p (%p) complete\n", inode, dentry);
set_bit(CEPH_D_COMPLETE, &ceph_dentry(dentry)->flags);
}
dput(dentry);
}
bool ceph_dir_test_complete(struct inode *inode)
{
/* not yet implemented */
struct dentry *dentry = d_find_any_alias(inode);
if (dentry && ceph_dentry(dentry)) {
dout(" marking %p (%p) NOT complete\n", inode, dentry);
clear_bit(CEPH_D_COMPLETE, &ceph_dentry(dentry)->flags);
}
dput(dentry);
return false;
}
@ -1220,6 +1237,7 @@ static int ceph_dir_fsync(struct file *file, loff_t start, loff_t end,
do {
ceph_mdsc_get_request(req);
spin_unlock(&ci->i_unsafe_lock);
dout("dir_fsync %p wait on tid %llu (until %llu)\n",
inode, req->r_tid, last_tid);
if (req->r_timeout) {
@ -1232,9 +1250,9 @@ static int ceph_dir_fsync(struct file *file, loff_t start, loff_t end,
} else {
wait_for_completion(&req->r_safe_completion);
}
spin_lock(&ci->i_unsafe_lock);
ceph_mdsc_put_request(req);
spin_lock(&ci->i_unsafe_lock);
if (ret || list_empty(head))
break;
req = list_entry(head->next,
@ -1259,13 +1277,11 @@ void ceph_dentry_lru_add(struct dentry *dn)
dout("dentry_lru_add %p %p '%.*s'\n", di, dn,
dn->d_name.len, dn->d_name.name);
if (di) {
mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
spin_lock(&mdsc->dentry_lru_lock);
list_add_tail(&di->lru, &mdsc->dentry_lru);
mdsc->num_dentry++;
spin_unlock(&mdsc->dentry_lru_lock);
}
mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
spin_lock(&mdsc->dentry_lru_lock);
list_add_tail(&di->lru, &mdsc->dentry_lru);
mdsc->num_dentry++;
spin_unlock(&mdsc->dentry_lru_lock);
}
void ceph_dentry_lru_touch(struct dentry *dn)
@ -1275,12 +1291,10 @@ void ceph_dentry_lru_touch(struct dentry *dn)
dout("dentry_lru_touch %p %p '%.*s' (offset %lld)\n", di, dn,
dn->d_name.len, dn->d_name.name, di->offset);
if (di) {
mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
spin_lock(&mdsc->dentry_lru_lock);
list_move_tail(&di->lru, &mdsc->dentry_lru);
spin_unlock(&mdsc->dentry_lru_lock);
}
mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
spin_lock(&mdsc->dentry_lru_lock);
list_move_tail(&di->lru, &mdsc->dentry_lru);
spin_unlock(&mdsc->dentry_lru_lock);
}
void ceph_dentry_lru_del(struct dentry *dn)
@ -1290,13 +1304,11 @@ void ceph_dentry_lru_del(struct dentry *dn)
dout("dentry_lru_del %p %p '%.*s'\n", di, dn,
dn->d_name.len, dn->d_name.name);
if (di) {
mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
spin_lock(&mdsc->dentry_lru_lock);
list_del_init(&di->lru);
mdsc->num_dentry--;
spin_unlock(&mdsc->dentry_lru_lock);
}
mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
spin_lock(&mdsc->dentry_lru_lock);
list_del_init(&di->lru);
mdsc->num_dentry--;
spin_unlock(&mdsc->dentry_lru_lock);
}
/*

6
fs/ceph/export.c
View file

@ -56,9 +56,7 @@ static int ceph_encode_fh(struct dentry *dentry, u32 *rawfh, int *max_len,
return -EINVAL;
spin_lock(&dentry->d_lock);
parent = dget(dentry->d_parent);
spin_unlock(&dentry->d_lock);
parent = dentry->d_parent;
if (*max_len >= connected_handle_length) {
dout("encode_fh %p connectable\n", dentry);
cfh->ino = ceph_ino(dentry->d_inode);
@ -81,7 +79,7 @@ static int ceph_encode_fh(struct dentry *dentry, u32 *rawfh, int *max_len,
*max_len = handle_length;
type = 255;
}
dput(parent);
spin_unlock(&dentry->d_lock);
return type;
}

3
fs/ceph/inode.c
View file

@ -850,11 +850,12 @@ static void ceph_set_dentry_offset(struct dentry *dn)
{
struct dentry *dir = dn->d_parent;
struct inode *inode = dir->d_inode;
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_inode_info *ci;
struct ceph_dentry_info *di;
BUG_ON(!inode);
ci = ceph_inode(inode);
di = ceph_dentry(dn);
spin_lock(&ci->i_ceph_lock);

4
fs/ceph/mds_client.c
View file

@ -2772,7 +2772,7 @@ static void handle_lease(struct ceph_mds_client *mdsc,
di = ceph_dentry(dentry);
switch (h->action) {
case CEPH_MDS_LEASE_REVOKE:
if (di && di->lease_session == session) {
if (di->lease_session == session) {
if (ceph_seq_cmp(di->lease_seq, seq) > 0)
h->seq = cpu_to_le32(di->lease_seq);
__ceph_mdsc_drop_dentry_lease(dentry);
@ -2781,7 +2781,7 @@ static void handle_lease(struct ceph_mds_client *mdsc,
break;
case CEPH_MDS_LEASE_RENEW:
if (di && di->lease_session == session &&
if (di->lease_session == session &&
di->lease_gen == session->s_cap_gen &&
di->lease_renew_from &&
di->lease_renew_after == 0) {

16
fs/ceph/super.c
View file

@ -131,6 +131,8 @@ enum {
Opt_rbytes,
Opt_norbytes,
Opt_noasyncreaddir,
Opt_dcache,
Opt_nodcache,
Opt_ino32,
};
@ -152,6 +154,8 @@ static match_table_t fsopt_tokens = {
{Opt_rbytes, "rbytes"},
{Opt_norbytes, "norbytes"},
{Opt_noasyncreaddir, "noasyncreaddir"},
{Opt_dcache, "dcache"},
{Opt_nodcache, "nodcache"},
{Opt_ino32, "ino32"},
{-1, NULL}
};
@ -231,6 +235,12 @@ static int parse_fsopt_token(char *c, void *private)
case Opt_noasyncreaddir:
fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR;
break;
case Opt_dcache:
fsopt->flags |= CEPH_MOUNT_OPT_DCACHE;
break;
case Opt_nodcache:
fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE;
break;
case Opt_ino32:
fsopt->flags |= CEPH_MOUNT_OPT_INO32;
break;
@ -377,6 +387,10 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root)
seq_puts(m, ",norbytes");
if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR)
seq_puts(m, ",noasyncreaddir");
if (fsopt->flags & CEPH_MOUNT_OPT_DCACHE)
seq_puts(m, ",dcache");
else
seq_puts(m, ",nodcache");
if (fsopt->wsize)
seq_printf(m, ",wsize=%d", fsopt->wsize);
@ -647,10 +661,10 @@ static struct dentry *open_root_dentry(struct ceph_fs_client *fsc,
root = ERR_PTR(-ENOMEM);
goto out;
}
ceph_init_dentry(root);
} else {
root = d_obtain_alias(inode);
}
ceph_init_dentry(root);
dout("open_root_inode success, root dentry is %p\n", root);
} else {
root = ERR_PTR(err);

1
fs/ceph/super.h
View file

@ -28,6 +28,7 @@
#define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */
#define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */
#define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */
#define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */
#define CEPH_MOUNT_OPT_DEFAULT (CEPH_MOUNT_OPT_RBYTES)

22
fs/ceph/xattr.c
View file

@ -818,6 +818,7 @@ int ceph_removexattr(struct dentry *dentry, const char *name)
struct ceph_vxattr_cb *vxattrs = ceph_inode_vxattrs(inode);
int issued;
int err;
int required_blob_size;
int dirty;
if (ceph_snap(inode) != CEPH_NOSNAP)
@ -833,14 +834,34 @@ int ceph_removexattr(struct dentry *dentry, const char *name)
return -EOPNOTSUPP;
}
err = -ENOMEM;
spin_lock(&ci->i_ceph_lock);
__build_xattrs(inode);
retry:
issued = __ceph_caps_issued(ci, NULL);
dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued));
if (!(issued & CEPH_CAP_XATTR_EXCL))
goto do_sync;
required_blob_size = __get_required_blob_size(ci, 0, 0);
if (!ci->i_xattrs.prealloc_blob ||
required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) {
struct ceph_buffer *blob;
spin_unlock(&ci->i_ceph_lock);
dout(" preaallocating new blob size=%d\n", required_blob_size);
blob = ceph_buffer_new(required_blob_size, GFP_NOFS);
if (!blob)
goto out;
spin_lock(&ci->i_ceph_lock);
if (ci->i_xattrs.prealloc_blob)
ceph_buffer_put(ci->i_xattrs.prealloc_blob);
ci->i_xattrs.prealloc_blob = blob;
goto retry;
}
err = __remove_xattr_by_name(ceph_inode(inode), name);
dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL);
ci->i_xattrs.dirty = true;
@ -853,6 +874,7 @@ int ceph_removexattr(struct dentry *dentry, const char *name)
do_sync:
spin_unlock(&ci->i_ceph_lock);
err = ceph_send_removexattr(dentry, name);
out:
return err;
}

11
fs/dcache.c
View file

@ -1475,7 +1475,14 @@ static struct dentry * __d_find_any_alias(struct inode *inode)
return alias;
}
static struct dentry * d_find_any_alias(struct inode *inode)
/**
* d_find_any_alias - find any alias for a given inode
* @inode: inode to find an alias for
*
* If any aliases exist for the given inode, take and return a
* reference for one of them. If no aliases exist, return %NULL.
*/
struct dentry *d_find_any_alias(struct inode *inode)
{
struct dentry *de;
@ -1484,7 +1491,7 @@ static struct dentry * d_find_any_alias(struct inode *inode)
spin_unlock(&inode->i_lock);
return de;
}
EXPORT_SYMBOL(d_find_any_alias);
/**
* d_obtain_alias - find or allocate a dentry for a given inode

1
include/linux/dcache.h
View file

@ -242,6 +242,7 @@ extern struct dentry * d_alloc(struct dentry *, const struct qstr *);
extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
extern struct dentry * d_splice_alias(struct inode *, struct dentry *);
extern struct dentry * d_add_ci(struct dentry *, struct inode *, struct qstr *);
extern struct dentry *d_find_any_alias(struct inode *inode);
extern struct dentry * d_obtain_alias(struct inode *);
extern void shrink_dcache_sb(struct super_block *);
extern void shrink_dcache_parent(struct dentry *);

11
net/ceph/crush/mapper.c
View file

@ -510,10 +510,15 @@ int crush_do_rule(struct crush_map *map,
switch (rule->steps[step].op) {
case CRUSH_RULE_TAKE:
w[0] = rule->steps[step].arg1;
if (force_pos >= 0) {
BUG_ON(force_context[force_pos] != w[0]);
/* find position in force_context/hierarchy */
while (force_pos >= 0 &&
force_context[force_pos] != w[0])
force_pos--;
}
/* and move past it */
if (force_pos >= 0)
force_pos--;
wsize = 1;
break;

3
net/ceph/crypto.c
View file

@ -15,10 +15,9 @@ int ceph_crypto_key_clone(struct ceph_crypto_key *dst,
const struct ceph_crypto_key *src)
{
memcpy(dst, src, sizeof(struct ceph_crypto_key));
dst->key = kmalloc(src->len, GFP_NOFS);
dst->key = kmemdup(src->key, src->len, GFP_NOFS);
if (!dst->key)
return -ENOMEM;
memcpy(dst->key, src->key, src->len);
return 0;
}

21
net/ceph/osd_client.c
View file

@ -29,8 +29,8 @@ static void __register_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req);
static void __unregister_linger_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req);
static int __send_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req);
static void __send_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req);
static int op_needs_trail(int op)
{
@ -1022,8 +1022,8 @@ out:
/*
* caller should hold map_sem (for read) and request_mutex
*/
static int __send_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req)
static void __send_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req)
{
struct ceph_osd_request_head *reqhead;
@ -1041,7 +1041,6 @@ static int __send_request(struct ceph_osd_client *osdc,
ceph_msg_get(req->r_request); /* send consumes a ref */
ceph_con_send(&req->r_osd->o_con, req->r_request);
req->r_sent = req->r_osd->o_incarnation;
return 0;
}
/*
@ -1726,17 +1725,9 @@ int ceph_osdc_start_request(struct ceph_osd_client *osdc,
dout("send_request %p no up osds in pg\n", req);
ceph_monc_request_next_osdmap(&osdc->client->monc);
} else {
rc = __send_request(osdc, req);
if (rc) {
if (nofail) {
dout("osdc_start_request failed send, "
" will retry %lld\n", req->r_tid);
rc = 0;
} else {
__unregister_request(osdc, req);
}
}
__send_request(osdc, req);
}
rc = 0;
}
out_unlock: