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Commit b7a818e4 authored by Linus Torvalds's avatar Linus Torvalds
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Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2 

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2: (28 commits)
  ocfs2: Teach ocfs2_drop_lock() to use ->set_lvb() callback
  ocfs2: Remove ->unblock lockres operation
  ocfs2: move downconvert worker to lockres ops
  ocfs2: Remove unused dlmglue functions
  ocfs2: Have the metadata lock use generic dlmglue functions
  ocfs2: Add ->set_lvb callback in dlmglue
  ocfs2: Add ->check_downconvert callback in dlmglue
  ocfs2: Check for refreshing locks in generic unblock function
  ocfs2: don't unconditionally pass LVB flags
  ocfs2: combine inode and generic blocking AST functions
  ocfs2: Add ->get_osb() dlmglue locking operation
  ocfs2: remove ->unlock_ast() callback from ocfs2_lock_res_ops
  ocfs2: combine inode and generic AST functions
  ocfs2: Clean up lock resource refresh flags
  ocfs2: Remove i_generation from inode lock names
  ocfs2: Encode i_generation in the meta data lvb
  ocfs2: Free up some space in the lvb
  ocfs2: Remove special casing for inode creation in ocfs2_dentry_attach_lock()
  ocfs2: manually d_move() during ocfs2_rename()
  [PATCH] Allow file systems to manually d_move() inside of ->rename()
  ...
parents 398477d4 0d5dc6c2
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Showing with 1245 additions and 910 deletions
fs/namei.c
View file @ b7a818e4
......@@ -2370,7 +2370,8 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
dput(new_dentry);
}
if (!error)
d_move(old_dentry,new_dentry);
if (!(old_dir->i_sb->s_type->fs_flags & FS_RENAME_DOES_D_MOVE))
d_move(old_dentry,new_dentry);
return error;
}
......@@ -2393,8 +2394,7 @@ static int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry,
else
error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry);
if (!error) {
/* The following d_move() should become unconditional */
if (!(old_dir->i_sb->s_type->fs_flags & FS_ODD_RENAME))
if (!(old_dir->i_sb->s_type->fs_flags & FS_RENAME_DOES_D_MOVE))
d_move(old_dentry, new_dentry);
}
if (target)
......
fs/nfs/dir.c
View file @ b7a818e4
......@@ -1669,8 +1669,7 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (rehash)
d_rehash(rehash);
if (!error) {
if (!S_ISDIR(old_inode->i_mode))
d_move(old_dentry, new_dentry);
d_move(old_dentry, new_dentry);
nfs_renew_times(new_dentry);
nfs_set_verifier(new_dentry, nfs_save_change_attribute(new_dir));
}
......
fs/nfs/super.c
View file @ b7a818e4
......@@ -71,7 +71,7 @@ static struct file_system_type nfs_fs_type = {
.name = "nfs",
.get_sb = nfs_get_sb,
.kill_sb = nfs_kill_super,
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
struct file_system_type nfs_xdev_fs_type = {
......@@ -79,7 +79,7 @@ struct file_system_type nfs_xdev_fs_type = {
.name = "nfs",
.get_sb = nfs_xdev_get_sb,
.kill_sb = nfs_kill_super,
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
static struct super_operations nfs_sops = {
......@@ -107,7 +107,7 @@ static struct file_system_type nfs4_fs_type = {
.name = "nfs4",
.get_sb = nfs4_get_sb,
.kill_sb = nfs4_kill_super,
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
struct file_system_type nfs4_xdev_fs_type = {
......@@ -115,7 +115,7 @@ struct file_system_type nfs4_xdev_fs_type = {
.name = "nfs4",
.get_sb = nfs4_xdev_get_sb,
.kill_sb = nfs4_kill_super,
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
struct file_system_type nfs4_referral_fs_type = {
......@@ -123,7 +123,7 @@ struct file_system_type nfs4_referral_fs_type = {
.name = "nfs4",
.get_sb = nfs4_referral_get_sb,
.kill_sb = nfs4_kill_super,
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
static struct super_operations nfs4_sops = {
......
fs/ocfs2/cluster/tcp_internal.h
View file @ b7a818e4
......@@ -44,11 +44,17 @@
* locking semantics of the file system using the protocol. It should
* be somewhere else, I'm sure, but right now it isn't.
*
* New in version 4:
* - Remove i_generation from lock names for better stat performance.
*
* New in version 3:
* - Replace dentry votes with a cluster lock
*
* New in version 2:
* - full 64 bit i_size in the metadata lock lvbs
* - introduction of "rw" lock and pushing meta/data locking down
*/
#define O2NET_PROTOCOL_VERSION 2ULL
#define O2NET_PROTOCOL_VERSION 4ULL
struct o2net_handshake {
__be64 protocol_version;
__be64 connector_id;
......
fs/ocfs2/dcache.c
View file @ b7a818e4
......@@ -35,15 +35,17 @@
#include "alloc.h"
#include "dcache.h"
#include "dlmglue.h"
#include "file.h"
#include "inode.h"
static int ocfs2_dentry_revalidate(struct dentry *dentry,
struct nameidata *nd)
{
struct inode *inode = dentry->d_inode;
int ret = 0; /* if all else fails, just return false */
struct ocfs2_super *osb;
struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
mlog_entry("(0x%p, '%.*s')\n", dentry,
dentry->d_name.len, dentry->d_name.name);
......@@ -55,28 +57,31 @@ static int ocfs2_dentry_revalidate(struct dentry *dentry,
goto bail;
}
osb = OCFS2_SB(inode->i_sb);
BUG_ON(!osb);
if (inode != osb->root_inode) {
spin_lock(&OCFS2_I(inode)->ip_lock);
/* did we or someone else delete this inode? */
if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
spin_unlock(&OCFS2_I(inode)->ip_lock);
mlog(0, "inode (%llu) deleted, returning false\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno);
goto bail;
}
if (inode == osb->root_inode || is_bad_inode(inode))
goto bail;
spin_lock(&OCFS2_I(inode)->ip_lock);
/* did we or someone else delete this inode? */
if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
spin_unlock(&OCFS2_I(inode)->ip_lock);
mlog(0, "inode (%llu) deleted, returning false\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno);
goto bail;
}
spin_unlock(&OCFS2_I(inode)->ip_lock);
if (!inode->i_nlink) {
mlog(0, "Inode %llu orphaned, returning false "
"dir = %d\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno,
S_ISDIR(inode->i_mode));
goto bail;
}
/*
* We don't need a cluster lock to test this because once an
* inode nlink hits zero, it never goes back.
*/
if (inode->i_nlink == 0) {
mlog(0, "Inode %llu orphaned, returning false "
"dir = %d\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno,
S_ISDIR(inode->i_mode));
goto bail;
}
ret = 1;
......@@ -87,6 +92,322 @@ static int ocfs2_dentry_revalidate(struct dentry *dentry,
return ret;
}
static int ocfs2_match_dentry(struct dentry *dentry,
u64 parent_blkno,
int skip_unhashed)
{
struct inode *parent;
/*
* ocfs2_lookup() does a d_splice_alias() _before_ attaching
* to the lock data, so we skip those here, otherwise
* ocfs2_dentry_attach_lock() will get its original dentry
* back.
*/
if (!dentry->d_fsdata)
return 0;
if (!dentry->d_parent)
return 0;
if (skip_unhashed && d_unhashed(dentry))
return 0;
parent = dentry->d_parent->d_inode;
/* Negative parent dentry? */
if (!parent)
return 0;
/* Name is in a different directory. */
if (OCFS2_I(parent)->ip_blkno != parent_blkno)
return 0;
return 1;
}
/*
* Walk the inode alias list, and find a dentry which has a given
* parent. ocfs2_dentry_attach_lock() wants to find _any_ alias as it
* is looking for a dentry_lock reference. The vote thread is looking
* to unhash aliases, so we allow it to skip any that already have
* that property.
*/
struct dentry *ocfs2_find_local_alias(struct inode *inode,
u64 parent_blkno,
int skip_unhashed)
{
struct list_head *p;
struct dentry *dentry = NULL;
spin_lock(&dcache_lock);
list_for_each(p, &inode->i_dentry) {
dentry = list_entry(p, struct dentry, d_alias);
if (ocfs2_match_dentry(dentry, parent_blkno, skip_unhashed)) {
mlog(0, "dentry found: %.*s\n",
dentry->d_name.len, dentry->d_name.name);
dget_locked(dentry);
break;
}
dentry = NULL;
}
spin_unlock(&dcache_lock);
return dentry;
}
DEFINE_SPINLOCK(dentry_attach_lock);
/*
* Attach this dentry to a cluster lock.
*
* Dentry locks cover all links in a given directory to a particular
* inode. We do this so that ocfs2 can build a lock name which all
* nodes in the cluster can agree on at all times. Shoving full names
* in the cluster lock won't work due to size restrictions. Covering
* links inside of a directory is a good compromise because it still
* allows us to use the parent directory lock to synchronize
* operations.
*
* Call this function with the parent dir semaphore and the parent dir
* cluster lock held.
*
* The dir semaphore will protect us from having to worry about
* concurrent processes on our node trying to attach a lock at the
* same time.
*
* The dir cluster lock (held at either PR or EX mode) protects us
* from unlink and rename on other nodes.
*
* A dput() can happen asynchronously due to pruning, so we cover
* attaching and detaching the dentry lock with a
* dentry_attach_lock.
*
* A node which has done lookup on a name retains a protected read
* lock until final dput. If the user requests and unlink or rename,
* the protected read is upgraded to an exclusive lock. Other nodes
* who have seen the dentry will then be informed that they need to
* downgrade their lock, which will involve d_delete on the
* dentry. This happens in ocfs2_dentry_convert_worker().
*/
int ocfs2_dentry_attach_lock(struct dentry *dentry,
struct inode *inode,
u64 parent_blkno)
{
int ret;
struct dentry *alias;
struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
mlog(0, "Attach \"%.*s\", parent %llu, fsdata: %p\n",
dentry->d_name.len, dentry->d_name.name,
(unsigned long long)parent_blkno, dl);
/*
* Negative dentry. We ignore these for now.
*
* XXX: Could we can improve ocfs2_dentry_revalidate() by
* tracking these?
*/
if (!inode)
return 0;
if (dl) {
mlog_bug_on_msg(dl->dl_parent_blkno != parent_blkno,
" \"%.*s\": old parent: %llu, new: %llu\n",
dentry->d_name.len, dentry->d_name.name,
(unsigned long long)parent_blkno,
(unsigned long long)dl->dl_parent_blkno);
return 0;
}
alias = ocfs2_find_local_alias(inode, parent_blkno, 0);
if (alias) {
/*
* Great, an alias exists, which means we must have a
* dentry lock already. We can just grab the lock off
* the alias and add it to the list.
*
* We're depending here on the fact that this dentry
* was found and exists in the dcache and so must have
* a reference to the dentry_lock because we can't
* race creates. Final dput() cannot happen on it
* since we have it pinned, so our reference is safe.
*/
dl = alias->d_fsdata;
mlog_bug_on_msg(!dl, "parent %llu, ino %llu\n",
(unsigned long long)parent_blkno,
(unsigned long long)OCFS2_I(inode)->ip_blkno);
mlog_bug_on_msg(dl->dl_parent_blkno != parent_blkno,
" \"%.*s\": old parent: %llu, new: %llu\n",
dentry->d_name.len, dentry->d_name.name,
(unsigned long long)parent_blkno,
(unsigned long long)dl->dl_parent_blkno);
mlog(0, "Found: %s\n", dl->dl_lockres.l_name);
goto out_attach;
}
/*
* There are no other aliases
*/
dl = kmalloc(sizeof(*dl), GFP_NOFS);
if (!dl) {
ret = -ENOMEM;
mlog_errno(ret);
return ret;
}
dl->dl_count = 0;
/*
* Does this have to happen below, for all attaches, in case
* the struct inode gets blown away by votes?
*/
dl->dl_inode = igrab(inode);
dl->dl_parent_blkno = parent_blkno;
ocfs2_dentry_lock_res_init(dl, parent_blkno, inode);
out_attach:
spin_lock(&dentry_attach_lock);
dentry->d_fsdata = dl;
dl->dl_count++;
spin_unlock(&dentry_attach_lock);
/*
* This actually gets us our PRMODE level lock. From now on,
* we'll have a notification if one of these names is
* destroyed on another node.
*/
ret = ocfs2_dentry_lock(dentry, 0);
if (!ret)
ocfs2_dentry_unlock(dentry, 0);
else
mlog_errno(ret);
dput(alias);
return ret;
}
/*
* ocfs2_dentry_iput() and friends.
*
* At this point, our particular dentry is detached from the inodes
* alias list, so there's no way that the locking code can find it.
*
* The interesting stuff happens when we determine that our lock needs
* to go away because this is the last subdir alias in the
* system. This function needs to handle a couple things:
*
* 1) Synchronizing lock shutdown with the downconvert threads. This
* is already handled for us via the lockres release drop function
* called in ocfs2_release_dentry_lock()
*
* 2) A race may occur when we're doing our lock shutdown and
* another process wants to create a new dentry lock. Right now we
* let them race, which means that for a very short while, this
* node might have two locks on a lock resource. This should be a
* problem though because one of them is in the process of being
* thrown out.
*/
static void ocfs2_drop_dentry_lock(struct ocfs2_super *osb,
struct ocfs2_dentry_lock *dl)
{
ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
ocfs2_lock_res_free(&dl->dl_lockres);
iput(dl->dl_inode);
kfree(dl);
}
void ocfs2_dentry_lock_put(struct ocfs2_super *osb,
struct ocfs2_dentry_lock *dl)
{
int unlock = 0;
BUG_ON(dl->dl_count == 0);
spin_lock(&dentry_attach_lock);
dl->dl_count--;
unlock = !dl->dl_count;
spin_unlock(&dentry_attach_lock);
if (unlock)
ocfs2_drop_dentry_lock(osb, dl);
}
static void ocfs2_dentry_iput(struct dentry *dentry, struct inode *inode)
{
struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
mlog_bug_on_msg(!dl && !(dentry->d_flags & DCACHE_DISCONNECTED),
"dentry: %.*s\n", dentry->d_name.len,
dentry->d_name.name);
if (!dl)
goto out;
mlog_bug_on_msg(dl->dl_count == 0, "dentry: %.*s, count: %u\n",
dentry->d_name.len, dentry->d_name.name,
dl->dl_count);
ocfs2_dentry_lock_put(OCFS2_SB(dentry->d_sb), dl);
out:
iput(inode);
}
/*
* d_move(), but keep the locks in sync.
*
* When we are done, "dentry" will have the parent dir and name of
* "target", which will be thrown away.
*
* We manually update the lock of "dentry" if need be.
*
* "target" doesn't have it's dentry lock touched - we allow the later
* dput() to handle this for us.
*
* This is called during ocfs2_rename(), while holding parent
* directory locks. The dentries have already been deleted on other
* nodes via ocfs2_remote_dentry_delete().
*
* Normally, the VFS handles the d_move() for the file sytem, after
* the ->rename() callback. OCFS2 wants to handle this internally, so
* the new lock can be created atomically with respect to the cluster.
*/
void ocfs2_dentry_move(struct dentry *dentry, struct dentry *target,
struct inode *old_dir, struct inode *new_dir)
{
int ret;
struct ocfs2_super *osb = OCFS2_SB(old_dir->i_sb);
struct inode *inode = dentry->d_inode;
/*
* Move within the same directory, so the actual lock info won't
* change.
*
* XXX: Is there any advantage to dropping the lock here?
*/
if (old_dir == new_dir)
goto out_move;
ocfs2_dentry_lock_put(osb, dentry->d_fsdata);
dentry->d_fsdata = NULL;
ret = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(new_dir)->ip_blkno);
if (ret)
mlog_errno(ret);
out_move:
d_move(dentry, target);
}
struct dentry_operations ocfs2_dentry_ops = {
.d_revalidate = ocfs2_dentry_revalidate,
.d_iput = ocfs2_dentry_iput,
};
fs/ocfs2/dcache.h
View file @ b7a818e4
......@@ -28,4 +28,31 @@
extern struct dentry_operations ocfs2_dentry_ops;
struct ocfs2_dentry_lock {
unsigned int dl_count;
u64 dl_parent_blkno;
/*
* The ocfs2_dentry_lock keeps an inode reference until
* dl_lockres has been destroyed. This is usually done in
* ->d_iput() anyway, so there should be minimal impact.
*/
struct inode *dl_inode;
struct ocfs2_lock_res dl_lockres;
};
int ocfs2_dentry_attach_lock(struct dentry *dentry, struct inode *inode,
u64 parent_blkno);
void ocfs2_dentry_lock_put(struct ocfs2_super *osb,
struct ocfs2_dentry_lock *dl);
struct dentry *ocfs2_find_local_alias(struct inode *inode, u64 parent_blkno,
int skip_unhashed);
void ocfs2_dentry_move(struct dentry *dentry, struct dentry *target,
struct inode *old_dir, struct inode *new_dir);
extern spinlock_t dentry_attach_lock;
#endif /* OCFS2_DCACHE_H */
fs/ocfs2/dlm/dlmapi.h
View file @ b7a818e4
......@@ -182,6 +182,7 @@ enum dlm_status dlmlock(struct dlm_ctxt *dlm,
struct dlm_lockstatus *lksb,
int flags,
const char *name,
int namelen,
dlm_astlockfunc_t *ast,
void *data,
dlm_bastlockfunc_t *bast);
......
fs/ocfs2/dlm/dlmast.c
View file @ b7a818e4
......@@ -320,8 +320,8 @@ int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data)
res = dlm_lookup_lockres(dlm, name, locklen);
if (!res) {
mlog(ML_ERROR, "got %sast for unknown lockres! "
"cookie=%u:%llu, name=%.*s, namelen=%u\n",
mlog(0, "got %sast for unknown lockres! "
"cookie=%u:%llu, name=%.*s, namelen=%u\n",
past->type == DLM_AST ? "" : "b",
dlm_get_lock_cookie_node(cookie),
dlm_get_lock_cookie_seq(cookie),
......@@ -462,7 +462,7 @@ int dlm_send_proxy_ast_msg(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
mlog(ML_ERROR, "sent AST to node %u, it returned "
"DLM_MIGRATING!\n", lock->ml.node);
BUG();
} else if (status != DLM_NORMAL) {
} else if (status != DLM_NORMAL && status != DLM_IVLOCKID) {
mlog(ML_ERROR, "AST to node %u returned %d!\n",
lock->ml.node, status);
/* ignore it */
......
fs/ocfs2/dlm/dlmcommon.h
View file @ b7a818e4
......@@ -747,6 +747,7 @@ void dlm_change_lockres_owner(struct dlm_ctxt *dlm,
u8 owner);
struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm,
const char *lockid,
int namelen,
int flags);
struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm,
const char *name,
......
fs/ocfs2/dlm/dlmlock.c
View file @ b7a818e4
......@@ -540,8 +540,8 @@ static inline void dlm_get_next_cookie(u8 node_num, u64 *cookie)
enum dlm_status dlmlock(struct dlm_ctxt *dlm, int mode,
struct dlm_lockstatus *lksb, int flags,
const char *name, dlm_astlockfunc_t *ast, void *data,
dlm_bastlockfunc_t *bast)
const char *name, int namelen, dlm_astlockfunc_t *ast,
void *data, dlm_bastlockfunc_t *bast)
{
enum dlm_status status;
struct dlm_lock_resource *res = NULL;
......@@ -571,7 +571,7 @@ enum dlm_status dlmlock(struct dlm_ctxt *dlm, int mode,
recovery = (flags & LKM_RECOVERY);
if (recovery &&
(!dlm_is_recovery_lock(name, strlen(name)) || convert) ) {
(!dlm_is_recovery_lock(name, namelen) || convert) ) {
dlm_error(status);
goto error;
}
......@@ -643,7 +643,7 @@ enum dlm_status dlmlock(struct dlm_ctxt *dlm, int mode,
}
status = DLM_IVBUFLEN;
if (strlen(name) > DLM_LOCKID_NAME_MAX || strlen(name) < 1) {
if (namelen > DLM_LOCKID_NAME_MAX || namelen < 1) {
dlm_error(status);
goto error;
}
......@@ -659,7 +659,7 @@ enum dlm_status dlmlock(struct dlm_ctxt *dlm, int mode,
dlm_wait_for_recovery(dlm);
/* find or create the lock resource */
res = dlm_get_lock_resource(dlm, name, flags);
res = dlm_get_lock_resource(dlm, name, namelen, flags);
if (!res) {
status = DLM_IVLOCKID;
dlm_error(status);
......
fs/ocfs2/dlm/dlmmaster.c
View file @ b7a818e4
......@@ -740,6 +740,7 @@ struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm,
*/
struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm,
const char *lockid,
int namelen,
int flags)
{
struct dlm_lock_resource *tmpres=NULL, *res=NULL;
......@@ -748,13 +749,12 @@ struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm,
int blocked = 0;
int ret, nodenum;
struct dlm_node_iter iter;
unsigned int namelen, hash;
unsigned int hash;
int tries = 0;
int bit, wait_on_recovery = 0;
BUG_ON(!lockid);
namelen = strlen(lockid);
hash = dlm_lockid_hash(lockid, namelen);
mlog(0, "get lockres %s (len %d)\n", lockid, namelen);
......
fs/ocfs2/dlm/dlmrecovery.c
View file @ b7a818e4
......@@ -2285,7 +2285,8 @@ static int dlm_pick_recovery_master(struct dlm_ctxt *dlm)
memset(&lksb, 0, sizeof(lksb));
ret = dlmlock(dlm, LKM_EXMODE, &lksb, LKM_NOQUEUE|LKM_RECOVERY,
DLM_RECOVERY_LOCK_NAME, dlm_reco_ast, dlm, dlm_reco_bast);
DLM_RECOVERY_LOCK_NAME, DLM_RECOVERY_LOCK_NAME_LEN,
dlm_reco_ast, dlm, dlm_reco_bast);
mlog(0, "%s: dlmlock($RECOVERY) returned %d, lksb=%d\n",
dlm->name, ret, lksb.status);
......
fs/ocfs2/dlm/userdlm.c
View file @ b7a818e4
......@@ -102,10 +102,10 @@ static inline void user_recover_from_dlm_error(struct user_lock_res *lockres)
spin_unlock(&lockres->l_lock);
}
#define user_log_dlm_error(_func, _stat, _lockres) do { \
mlog(ML_ERROR, "Dlm error \"%s\" while calling %s on " \
"resource %s: %s\n", dlm_errname(_stat), _func, \
_lockres->l_name, dlm_errmsg(_stat)); \
#define user_log_dlm_error(_func, _stat, _lockres) do { \
mlog(ML_ERROR, "Dlm error \"%s\" while calling %s on " \
"resource %.*s: %s\n", dlm_errname(_stat), _func, \
_lockres->l_namelen, _lockres->l_name, dlm_errmsg(_stat)); \
} while (0)
/* WARNING: This function lives in a world where the only three lock
......@@ -127,21 +127,22 @@ static void user_ast(void *opaque)
struct user_lock_res *lockres = opaque;
struct dlm_lockstatus *lksb;
mlog(0, "AST fired for lockres %s\n", lockres->l_name);
mlog(0, "AST fired for lockres %.*s\n", lockres->l_namelen,
lockres->l_name);
spin_lock(&lockres->l_lock);
lksb = &(lockres->l_lksb);
if (lksb->status != DLM_NORMAL) {
mlog(ML_ERROR, "lksb status value of %u on lockres %s\n",
lksb->status, lockres->l_name);
mlog(ML_ERROR, "lksb status value of %u on lockres %.*s\n",
lksb->status, lockres->l_namelen, lockres->l_name);
spin_unlock(&lockres->l_lock);
return;
}
mlog_bug_on_msg(lockres->l_requested == LKM_IVMODE,
"Lockres %s, requested ivmode. flags 0x%x\n",
lockres->l_name, lockres->l_flags);
"Lockres %.*s, requested ivmode. flags 0x%x\n",
lockres->l_namelen, lockres->l_name, lockres->l_flags);
/* we're downconverting. */
if (lockres->l_requested < lockres->l_level) {
......@@ -213,8 +214,8 @@ static void user_bast(void *opaque, int level)
{
struct user_lock_res *lockres = opaque;
mlog(0, "Blocking AST fired for lockres %s. Blocking level %d\n",
lockres->l_name, level);
mlog(0, "Blocking AST fired for lockres %.*s. Blocking level %d\n",
lockres->l_namelen, lockres->l_name, level);
spin_lock(&lockres->l_lock);
lockres->l_flags |= USER_LOCK_BLOCKED;
......@@ -231,7 +232,8 @@ static void user_unlock_ast(void *opaque, enum dlm_status status)
{
struct user_lock_res *lockres = opaque;
mlog(0, "UNLOCK AST called on lock %s\n", lockres->l_name);
mlog(0, "UNLOCK AST called on lock %.*s\n", lockres->l_namelen,
lockres->l_name);
if (status != DLM_NORMAL && status != DLM_CANCELGRANT)
mlog(ML_ERROR, "Dlm returns status %d\n", status);
......@@ -244,8 +246,6 @@ static void user_unlock_ast(void *opaque, enum dlm_status status)
&& !(lockres->l_flags & USER_LOCK_IN_CANCEL)) {
lockres->l_level = LKM_IVMODE;
} else if (status == DLM_CANCELGRANT) {
mlog(0, "Lock %s, cancel fails, flags 0x%x\n",
lockres->l_name, lockres->l_flags);
/* We tried to cancel a convert request, but it was
* already granted. Don't clear the busy flag - the
* ast should've done this already. */
......@@ -255,8 +255,6 @@ static void user_unlock_ast(void *opaque, enum dlm_status status)
} else {
BUG_ON(!(lockres->l_flags & USER_LOCK_IN_CANCEL));
/* Cancel succeeded, we want to re-queue */
mlog(0, "Lock %s, cancel succeeds, flags 0x%x\n",
lockres->l_name, lockres->l_flags);
lockres->l_requested = LKM_IVMODE; /* cancel an
* upconvert
* request. */
......@@ -287,13 +285,14 @@ static void user_dlm_unblock_lock(void *opaque)
struct user_lock_res *lockres = (struct user_lock_res *) opaque;
struct dlm_ctxt *dlm = dlm_ctxt_from_user_lockres(lockres);
mlog(0, "processing lockres %s\n", lockres->l_name);
mlog(0, "processing lockres %.*s\n", lockres->l_namelen,
lockres->l_name);
spin_lock(&lockres->l_lock);
mlog_bug_on_msg(!(lockres->l_flags & USER_LOCK_QUEUED),
"Lockres %s, flags 0x%x\n",
lockres->l_name, lockres->l_flags);
"Lockres %.*s, flags 0x%x\n",
lockres->l_namelen, lockres->l_name, lockres->l_flags);
/* notice that we don't clear USER_LOCK_BLOCKED here. If it's
* set, we want user_ast clear it. */
......@@ -305,22 +304,16 @@ static void user_dlm_unblock_lock(void *opaque)
* flag, and finally we might get another bast which re-queues
* us before our ast for the downconvert is called. */
if (!(lockres->l_flags & USER_LOCK_BLOCKED)) {
mlog(0, "Lockres %s, flags 0x%x: queued but not blocking\n",
lockres->l_name, lockres->l_flags);
spin_unlock(&lockres->l_lock);
goto drop_ref;
}
if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {
mlog(0, "lock is in teardown so we do nothing\n");
spin_unlock(&lockres->l_lock);
goto drop_ref;
}
if (lockres->l_flags & USER_LOCK_BUSY) {
mlog(0, "Cancel lock %s, flags 0x%x\n",
lockres->l_name, lockres->l_flags);
if (lockres->l_flags & USER_LOCK_IN_CANCEL) {
spin_unlock(&lockres->l_lock);
goto drop_ref;
......@@ -372,6 +365,7 @@ static void user_dlm_unblock_lock(void *opaque)
&lockres->l_lksb,
LKM_CONVERT|LKM_VALBLK,
lockres->l_name,
lockres->l_namelen,
user_ast,
lockres,
user_bast);
......@@ -420,16 +414,16 @@ int user_dlm_cluster_lock(struct user_lock_res *lockres,
if (level != LKM_EXMODE &&
level != LKM_PRMODE) {
mlog(ML_ERROR, "lockres %s: invalid request!\n",
lockres->l_name);
mlog(ML_ERROR, "lockres %.*s: invalid request!\n",
lockres->l_namelen, lockres->l_name);
status = -EINVAL;
goto bail;
}
mlog(0, "lockres %s: asking for %s lock, passed flags = 0x%x\n",
lockres->l_name,
(level == LKM_EXMODE) ? "LKM_EXMODE" : "LKM_PRMODE",
lkm_flags);
mlog(0, "lockres %.*s: asking for %s lock, passed flags = 0x%x\n",
lockres->l_namelen, lockres->l_name,
(level == LKM_EXMODE) ? "LKM_EXMODE" : "LKM_PRMODE",
lkm_flags);
again:
if (signal_pending(current)) {
......@@ -474,15 +468,13 @@ int user_dlm_cluster_lock(struct user_lock_res *lockres,
BUG_ON(level == LKM_IVMODE);
BUG_ON(level == LKM_NLMODE);
mlog(0, "lock %s, get lock from %d to level = %d\n",
lockres->l_name, lockres->l_level, level);
/* call dlm_lock to upgrade lock now */
status = dlmlock(dlm,
level,
&lockres->l_lksb,
local_flags,
lockres->l_name,
lockres->l_namelen,
user_ast,
lockres,
user_bast);
......@@ -498,9 +490,6 @@ int user_dlm_cluster_lock(struct user_lock_res *lockres,
goto bail;
}
mlog(0, "lock %s, successfull return from dlmlock\n",
lockres->l_name);
user_wait_on_busy_lock(lockres);
goto again;
}
......@@ -508,9 +497,6 @@ int user_dlm_cluster_lock(struct user_lock_res *lockres,
user_dlm_inc_holders(lockres, level);
spin_unlock(&lockres->l_lock);
mlog(0, "lockres %s: Got %s lock!\n", lockres->l_name,
(level == LKM_EXMODE) ? "LKM_EXMODE" : "LKM_PRMODE");
status = 0;
bail:
return status;
......@@ -538,13 +524,11 @@ void user_dlm_cluster_unlock(struct user_lock_res *lockres,
{
if (level != LKM_EXMODE &&
level != LKM_PRMODE) {
mlog(ML_ERROR, "lockres %s: invalid request!\n", lockres->l_name);
mlog(ML_ERROR, "lockres %.*s: invalid request!\n",
lockres->l_namelen, lockres->l_name);
return;
}
mlog(0, "lockres %s: dropping %s lock\n", lockres->l_name,
(level == LKM_EXMODE) ? "LKM_EXMODE" : "LKM_PRMODE");
spin_lock(&lockres->l_lock);
user_dlm_dec_holders(lockres, level);
__user_dlm_cond_queue_lockres(lockres);
......@@ -602,6 +586,7 @@ void user_dlm_lock_res_init(struct user_lock_res *lockres,
memcpy(lockres->l_name,
dentry->d_name.name,
dentry->d_name.len);
lockres->l_namelen = dentry->d_name.len;
}
int user_dlm_destroy_lock(struct user_lock_res *lockres)
......@@ -609,11 +594,10 @@ int user_dlm_destroy_lock(struct user_lock_res *lockres)
int status = -EBUSY;
struct dlm_ctxt *dlm = dlm_ctxt_from_user_lockres(lockres);
mlog(0, "asked to destroy %s\n", lockres->l_name);
mlog(0, "asked to destroy %.*s\n", lockres->l_namelen, lockres->l_name);
spin_lock(&lockres->l_lock);
if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {
mlog(0, "Lock is already torn down\n");
spin_unlock(&lockres->l_lock);
return 0;
}
......@@ -623,8 +607,6 @@ int user_dlm_destroy_lock(struct user_lock_res *lockres)
while (lockres->l_flags & USER_LOCK_BUSY) {
spin_unlock(&lockres->l_lock);
mlog(0, "lock %s is busy\n", lockres->l_name);
user_wait_on_busy_lock(lockres);
spin_lock(&lockres->l_lock);
......@@ -632,14 +614,12 @@ int user_dlm_destroy_lock(struct user_lock_res *lockres)
if (lockres->l_ro_holders || lockres->l_ex_holders) {
spin_unlock(&lockres->l_lock);
mlog(0, "lock %s has holders\n", lockres->l_name);
goto bail;
}
status = 0;
if (!(lockres->l_flags & USER_LOCK_ATTACHED)) {
spin_unlock(&lockres->l_lock);
mlog(0, "lock %s is not attached\n", lockres->l_name);
goto bail;
}
......@@ -647,7 +627,6 @@ int user_dlm_destroy_lock(struct user_lock_res *lockres)
lockres->l_flags |= USER_LOCK_BUSY;
spin_unlock(&lockres->l_lock);
mlog(0, "unlocking lockres %s\n", lockres->l_name);
status = dlmunlock(dlm,
&lockres->l_lksb,
LKM_VALBLK,
......
fs/ocfs2/dlm/userdlm.h
View file @ b7a818e4
......@@ -53,6 +53,7 @@ struct user_lock_res {
#define USER_DLM_LOCK_ID_MAX_LEN 32
char l_name[USER_DLM_LOCK_ID_MAX_LEN];
int l_namelen;
int l_level;
unsigned int l_ro_holders;
unsigned int l_ex_holders;
......
fs/ocfs2/dlmglue.c
View file @ b7a818e4
......@@ -46,6 +46,7 @@
#include "ocfs2.h"
#include "alloc.h"
#include "dcache.h"
#include "dlmglue.h"
#include "extent_map.h"
#include "heartbeat.h"
......@@ -66,78 +67,161 @@ struct ocfs2_mask_waiter {
unsigned long mw_goal;
};
static void ocfs2_inode_ast_func(void *opaque);
static void ocfs2_inode_bast_func(void *opaque,
int level);
static void ocfs2_super_ast_func(void *opaque);
static void ocfs2_super_bast_func(void *opaque,
int level);
static void ocfs2_rename_ast_func(void *opaque);
static void ocfs2_rename_bast_func(void *opaque,
int level);
/* so far, all locks have gotten along with the same unlock ast */
static void ocfs2_unlock_ast_func(void *opaque,
enum dlm_status status);
static int ocfs2_do_unblock_meta(struct inode *inode,
int *requeue);
static int ocfs2_unblock_meta(struct ocfs2_lock_res *lockres,
int *requeue);
static int ocfs2_unblock_data(struct ocfs2_lock_res *lockres,
int *requeue);
static int ocfs2_unblock_inode_lock(struct ocfs2_lock_res *lockres,
int *requeue);
static int ocfs2_unblock_osb_lock(struct ocfs2_lock_res *lockres,
int *requeue);
typedef void (ocfs2_convert_worker_t)(struct ocfs2_lock_res *, int);
static int ocfs2_generic_unblock_lock(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres,
int *requeue,
ocfs2_convert_worker_t *worker);
static struct ocfs2_super *ocfs2_get_dentry_osb(struct ocfs2_lock_res *lockres);
static struct ocfs2_super *ocfs2_get_inode_osb(struct ocfs2_lock_res *lockres);
/*
* Return value from ->downconvert_worker functions.
*
* These control the precise actions of ocfs2_unblock_lock()
* and ocfs2_process_blocked_lock()
*
*/
enum ocfs2_unblock_action {
UNBLOCK_CONTINUE = 0, /* Continue downconvert */
UNBLOCK_CONTINUE_POST = 1, /* Continue downconvert, fire
* ->post_unlock callback */
UNBLOCK_STOP_POST = 2, /* Do not downconvert, fire
* ->post_unlock() callback. */
};
struct ocfs2_unblock_ctl {
int requeue;
enum ocfs2_unblock_action unblock_action;
};
static int ocfs2_check_meta_downconvert(struct ocfs2_lock_res *lockres,
int new_level);
static void ocfs2_set_meta_lvb(struct ocfs2_lock_res *lockres);
static int ocfs2_data_convert_worker(struct ocfs2_lock_res *lockres,
int blocking);
static int ocfs2_dentry_convert_worker(struct ocfs2_lock_res *lockres,
int blocking);
static void ocfs2_dentry_post_unlock(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres);
/*
* OCFS2 Lock Resource Operations
*
* These fine tune the behavior of the generic dlmglue locking infrastructure.
*
* The most basic of lock types can point ->l_priv to their respective
* struct ocfs2_super and allow the default actions to manage things.
*
* Right now, each lock type also needs to implement an init function,
* and trivial lock/unlock wrappers. ocfs2_simple_drop_lockres()
* should be called when the lock is no longer needed (i.e., object
* destruction time).
*/
struct ocfs2_lock_res_ops {
void (*ast)(void *);
void (*bast)(void *, int);
void (*unlock_ast)(void *, enum dlm_status);
int (*unblock)(struct ocfs2_lock_res *, int *);
/*
* Translate an ocfs2_lock_res * into an ocfs2_super *. Define
* this callback if ->l_priv is not an ocfs2_super pointer
*/
struct ocfs2_super * (*get_osb)(struct ocfs2_lock_res *);
/*
* Optionally called in the downconvert (or "vote") thread
* after a successful downconvert. The lockres will not be
* referenced after this callback is called, so it is safe to
* free memory, etc.
*
* The exact semantics of when this is called are controlled
* by ->downconvert_worker()
*/
void (*post_unlock)(struct ocfs2_super *, struct ocfs2_lock_res *);
/*
* Allow a lock type to add checks to determine whether it is
* safe to downconvert a lock. Return 0 to re-queue the
* downconvert at a later time, nonzero to continue.
*
* For most locks, the default checks that there are no
* incompatible holders are sufficient.
*
* Called with the lockres spinlock held.
*/
int (*check_downconvert)(struct ocfs2_lock_res *, int);
/*
* Allows a lock type to populate the lock value block. This
* is called on downconvert, and when we drop a lock.
*
* Locks that want to use this should set LOCK_TYPE_USES_LVB
* in the flags field.
*
* Called with the lockres spinlock held.
*/
void (*set_lvb)(struct ocfs2_lock_res *);
/*
* Called from the downconvert thread when it is determined
* that a lock will be downconverted. This is called without
* any locks held so the function can do work that might
* schedule (syncing out data, etc).
*
* This should return any one of the ocfs2_unblock_action
* values, depending on what it wants the thread to do.
*/
int (*downconvert_worker)(struct ocfs2_lock_res *, int);
/*
* LOCK_TYPE_* flags which describe the specific requirements
* of a lock type. Descriptions of each individual flag follow.
*/
int flags;
};
/*
* Some locks want to "refresh" potentially stale data when a
* meaningful (PRMODE or EXMODE) lock level is first obtained. If this
* flag is set, the OCFS2_LOCK_NEEDS_REFRESH flag will be set on the
* individual lockres l_flags member from the ast function. It is
* expected that the locking wrapper will clear the
* OCFS2_LOCK_NEEDS_REFRESH flag when done.
*/
#define LOCK_TYPE_REQUIRES_REFRESH 0x1
/*
* Indicate that a lock type makes use of the lock value block. The
* ->set_lvb lock type callback must be defined.
*/
#define LOCK_TYPE_USES_LVB 0x2
static struct ocfs2_lock_res_ops ocfs2_inode_rw_lops = {
.ast = ocfs2_inode_ast_func,
.bast = ocfs2_inode_bast_func,
.unlock_ast = ocfs2_unlock_ast_func,
.unblock = ocfs2_unblock_inode_lock,
.get_osb = ocfs2_get_inode_osb,
.flags = 0,
};
static struct ocfs2_lock_res_ops ocfs2_inode_meta_lops = {
.ast = ocfs2_inode_ast_func,
.bast = ocfs2_inode_bast_func,
.unlock_ast = ocfs2_unlock_ast_func,
.unblock = ocfs2_unblock_meta,
.get_osb = ocfs2_get_inode_osb,
.check_downconvert = ocfs2_check_meta_downconvert,
.set_lvb = ocfs2_set_meta_lvb,
.flags = LOCK_TYPE_REQUIRES_REFRESH|LOCK_TYPE_USES_LVB,
};
static void ocfs2_data_convert_worker(struct ocfs2_lock_res *lockres,
int blocking);
static struct ocfs2_lock_res_ops ocfs2_inode_data_lops = {
.ast = ocfs2_inode_ast_func,
.bast = ocfs2_inode_bast_func,
.unlock_ast = ocfs2_unlock_ast_func,
.unblock = ocfs2_unblock_data,
.get_osb = ocfs2_get_inode_osb,
.downconvert_worker = ocfs2_data_convert_worker,
.flags = 0,
};
static struct ocfs2_lock_res_ops ocfs2_super_lops = {
.ast = ocfs2_super_ast_func,
.bast = ocfs2_super_bast_func,
.unlock_ast = ocfs2_unlock_ast_func,
.unblock = ocfs2_unblock_osb_lock,
.flags = LOCK_TYPE_REQUIRES_REFRESH,
};
static struct ocfs2_lock_res_ops ocfs2_rename_lops = {
.ast = ocfs2_rename_ast_func,
.bast = ocfs2_rename_bast_func,
.unlock_ast = ocfs2_unlock_ast_func,
.unblock = ocfs2_unblock_osb_lock,
.flags = 0,
};
static struct ocfs2_lock_res_ops ocfs2_dentry_lops = {
.get_osb = ocfs2_get_dentry_osb,
.post_unlock = ocfs2_dentry_post_unlock,
.downconvert_worker = ocfs2_dentry_convert_worker,
.flags = 0,
};
static inline int ocfs2_is_inode_lock(struct ocfs2_lock_res *lockres)
......@@ -147,29 +231,26 @@ static inline int ocfs2_is_inode_lock(struct ocfs2_lock_res *lockres)
lockres->l_type == OCFS2_LOCK_TYPE_RW;
}
static inline int ocfs2_is_super_lock(struct ocfs2_lock_res *lockres)
static inline struct inode *ocfs2_lock_res_inode(struct ocfs2_lock_res *lockres)
{
return lockres->l_type == OCFS2_LOCK_TYPE_SUPER;
}
BUG_ON(!ocfs2_is_inode_lock(lockres));
static inline int ocfs2_is_rename_lock(struct ocfs2_lock_res *lockres)
{
return lockres->l_type == OCFS2_LOCK_TYPE_RENAME;
return (struct inode *) lockres->l_priv;
}
static inline struct ocfs2_super *ocfs2_lock_res_super(struct ocfs2_lock_res *lockres)
static inline struct ocfs2_dentry_lock *ocfs2_lock_res_dl(struct ocfs2_lock_res *lockres)
{
BUG_ON(!ocfs2_is_super_lock(lockres)
&& !ocfs2_is_rename_lock(lockres));
BUG_ON(lockres->l_type != OCFS2_LOCK_TYPE_DENTRY);
return (struct ocfs2_super *) lockres->l_priv;
return (struct ocfs2_dentry_lock *)lockres->l_priv;
}
static inline struct inode *ocfs2_lock_res_inode(struct ocfs2_lock_res *lockres)
static inline struct ocfs2_super *ocfs2_get_lockres_osb(struct ocfs2_lock_res *lockres)
{
BUG_ON(!ocfs2_is_inode_lock(lockres));
if (lockres->l_ops->get_osb)
return lockres->l_ops->get_osb(lockres);
return (struct inode *) lockres->l_priv;
return (struct ocfs2_super *)lockres->l_priv;
}
static int ocfs2_lock_create(struct ocfs2_super *osb,
......@@ -200,25 +281,6 @@ static int ocfs2_meta_lock_update(struct inode *inode,
struct buffer_head **bh);
static void ocfs2_drop_osb_locks(struct ocfs2_super *osb);
static inline int ocfs2_highest_compat_lock_level(int level);
static inline int ocfs2_can_downconvert_meta_lock(struct inode *inode,
struct ocfs2_lock_res *lockres,
int new_level);
static char *ocfs2_lock_type_strings[] = {
[OCFS2_LOCK_TYPE_META] = "Meta",
[OCFS2_LOCK_TYPE_DATA] = "Data",
[OCFS2_LOCK_TYPE_SUPER] = "Super",
[OCFS2_LOCK_TYPE_RENAME] = "Rename",
/* Need to differntiate from [R]ename.. serializing writes is the
* important job it does, anyway. */
[OCFS2_LOCK_TYPE_RW] = "Write/Read",
};
static char *ocfs2_lock_type_string(enum ocfs2_lock_type type)
{
mlog_bug_on_msg(type >= OCFS2_NUM_LOCK_TYPES, "%d\n", type);
return ocfs2_lock_type_strings[type];
}
static void ocfs2_build_lock_name(enum ocfs2_lock_type type,
u64 blkno,
......@@ -265,13 +327,9 @@ static void ocfs2_remove_lockres_tracking(struct ocfs2_lock_res *res)
static void ocfs2_lock_res_init_common(struct ocfs2_super *osb,
struct ocfs2_lock_res *res,
enum ocfs2_lock_type type,
u64 blkno,
u32 generation,
struct ocfs2_lock_res_ops *ops,
void *priv)
{
ocfs2_build_lock_name(type, blkno, generation, res->l_name);
res->l_type = type;
res->l_ops = ops;
res->l_priv = priv;
......@@ -299,6 +357,7 @@ void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res)
void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
enum ocfs2_lock_type type,
unsigned int generation,
struct inode *inode)
{
struct ocfs2_lock_res_ops *ops;
......@@ -319,9 +378,73 @@ void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
break;
};
ocfs2_lock_res_init_common(OCFS2_SB(inode->i_sb), res, type,
OCFS2_I(inode)->ip_blkno,
inode->i_generation, ops, inode);
ocfs2_build_lock_name(type, OCFS2_I(inode)->ip_blkno,
generation, res->l_name);
ocfs2_lock_res_init_common(OCFS2_SB(inode->i_sb), res, type, ops, inode);
}
static struct ocfs2_super *ocfs2_get_inode_osb(struct ocfs2_lock_res *lockres)
{
struct inode *inode = ocfs2_lock_res_inode(lockres);
return OCFS2_SB(inode->i_sb);
}
static __u64 ocfs2_get_dentry_lock_ino(struct ocfs2_lock_res *lockres)
{
__be64 inode_blkno_be;
memcpy(&inode_blkno_be, &lockres->l_name[OCFS2_DENTRY_LOCK_INO_START],
sizeof(__be64));
return be64_to_cpu(inode_blkno_be);
}
static struct ocfs2_super *ocfs2_get_dentry_osb(struct ocfs2_lock_res *lockres)
{
struct ocfs2_dentry_lock *dl = lockres->l_priv;
return OCFS2_SB(dl->dl_inode->i_sb);
}
void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl,
u64 parent, struct inode *inode)
{
int len;
u64 inode_blkno = OCFS2_I(inode)->ip_blkno;
__be64 inode_blkno_be = cpu_to_be64(inode_blkno);
struct ocfs2_lock_res *lockres = &dl->dl_lockres;
ocfs2_lock_res_init_once(lockres);
/*
* Unfortunately, the standard lock naming scheme won't work
* here because we have two 16 byte values to use. Instead,
* we'll stuff the inode number as a binary value. We still
* want error prints to show something without garbling the
* display, so drop a null byte in there before the inode
* number. A future version of OCFS2 will likely use all
* binary lock names. The stringified names have been a
* tremendous aid in debugging, but now that the debugfs
* interface exists, we can mangle things there if need be.
*
* NOTE: We also drop the standard "pad" value (the total lock
* name size stays the same though - the last part is all
* zeros due to the memset in ocfs2_lock_res_init_once()
*/
len = snprintf(lockres->l_name, OCFS2_DENTRY_LOCK_INO_START,
"%c%016llx",
ocfs2_lock_type_char(OCFS2_LOCK_TYPE_DENTRY),
(long long)parent);
BUG_ON(len != (OCFS2_DENTRY_LOCK_INO_START - 1));
memcpy(&lockres->l_name[OCFS2_DENTRY_LOCK_INO_START], &inode_blkno_be,
sizeof(__be64));
ocfs2_lock_res_init_common(OCFS2_SB(inode->i_sb), lockres,
OCFS2_LOCK_TYPE_DENTRY, &ocfs2_dentry_lops,
dl);
}
static void ocfs2_super_lock_res_init(struct ocfs2_lock_res *res,
......@@ -330,8 +453,9 @@ static void ocfs2_super_lock_res_init(struct ocfs2_lock_res *res,
/* Superblock lockres doesn't come from a slab so we call init
* once on it manually. */
ocfs2_lock_res_init_once(res);
ocfs2_build_lock_name(OCFS2_LOCK_TYPE_SUPER, OCFS2_SUPER_BLOCK_BLKNO,
0, res->l_name);
ocfs2_lock_res_init_common(osb, res, OCFS2_LOCK_TYPE_SUPER,
OCFS2_SUPER_BLOCK_BLKNO, 0,
&ocfs2_super_lops, osb);
}
......@@ -341,7 +465,8 @@ static void ocfs2_rename_lock_res_init(struct ocfs2_lock_res *res,
/* Rename lockres doesn't come from a slab so we call init
* once on it manually. */
ocfs2_lock_res_init_once(res);
ocfs2_lock_res_init_common(osb, res, OCFS2_LOCK_TYPE_RENAME, 0, 0,
ocfs2_build_lock_name(OCFS2_LOCK_TYPE_RENAME, 0, 0, res->l_name);
ocfs2_lock_res_init_common(osb, res, OCFS2_LOCK_TYPE_RENAME,
&ocfs2_rename_lops, osb);
}
......@@ -495,7 +620,8 @@ static inline void ocfs2_generic_handle_convert_action(struct ocfs2_lock_res *lo
* information is already up to data. Convert from NL to
* *anything* however should mark ourselves as needing an
* update */
if (lockres->l_level == LKM_NLMODE)
if (lockres->l_level == LKM_NLMODE &&
lockres->l_ops->flags & LOCK_TYPE_REQUIRES_REFRESH)
lockres_or_flags(lockres, OCFS2_LOCK_NEEDS_REFRESH);
lockres->l_level = lockres->l_requested;
......@@ -512,7 +638,8 @@ static inline void ocfs2_generic_handle_attach_action(struct ocfs2_lock_res *loc
BUG_ON(lockres->l_flags & OCFS2_LOCK_ATTACHED);
if (lockres->l_requested > LKM_NLMODE &&
!(lockres->l_flags & OCFS2_LOCK_LOCAL))
!(lockres->l_flags & OCFS2_LOCK_LOCAL) &&
lockres->l_ops->flags & LOCK_TYPE_REQUIRES_REFRESH)
lockres_or_flags(lockres, OCFS2_LOCK_NEEDS_REFRESH);
lockres->l_level = lockres->l_requested;
......@@ -522,68 +649,6 @@ static inline void ocfs2_generic_handle_attach_action(struct ocfs2_lock_res *loc
mlog_exit_void();
}
static void ocfs2_inode_ast_func(void *opaque)
{
struct ocfs2_lock_res *lockres = opaque;
struct inode *inode;
struct dlm_lockstatus *lksb;
unsigned long flags;
mlog_entry_void();
inode = ocfs2_lock_res_inode(lockres);
mlog(0, "AST fired for inode %llu, l_action = %u, type = %s\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno, lockres->l_action,
ocfs2_lock_type_string(lockres->l_type));
BUG_ON(!ocfs2_is_inode_lock(lockres));
spin_lock_irqsave(&lockres->l_lock, flags);
lksb = &(lockres->l_lksb);
if (lksb->status != DLM_NORMAL) {
mlog(ML_ERROR, "ocfs2_inode_ast_func: lksb status value of %u "
"on inode %llu\n", lksb->status,
(unsigned long long)OCFS2_I(inode)->ip_blkno);
spin_unlock_irqrestore(&lockres->l_lock, flags);
mlog_exit_void();
return;
}
switch(lockres->l_action) {
case OCFS2_AST_ATTACH:
ocfs2_generic_handle_attach_action(lockres);
lockres_clear_flags(lockres, OCFS2_LOCK_LOCAL);
break;
case OCFS2_AST_CONVERT:
ocfs2_generic_handle_convert_action(lockres);
break;
case OCFS2_AST_DOWNCONVERT:
ocfs2_generic_handle_downconvert_action(lockres);
break;
default:
mlog(ML_ERROR, "lockres %s: ast fired with invalid action: %u "
"lockres flags = 0x%lx, unlock action: %u\n",
lockres->l_name, lockres->l_action, lockres->l_flags,
lockres->l_unlock_action);
BUG();
}
/* data and rw locking ignores refresh flag for now. */
if (lockres->l_type != OCFS2_LOCK_TYPE_META)
lockres_clear_flags(lockres, OCFS2_LOCK_NEEDS_REFRESH);
/* set it to something invalid so if we get called again we
* can catch it. */
lockres->l_action = OCFS2_AST_INVALID;
spin_unlock_irqrestore(&lockres->l_lock, flags);
wake_up(&lockres->l_event);
mlog_exit_void();
}
static int ocfs2_generic_handle_bast(struct ocfs2_lock_res *lockres,
int level)
{
......@@ -610,54 +675,33 @@ static int ocfs2_generic_handle_bast(struct ocfs2_lock_res *lockres,
return needs_downconvert;
}
static void ocfs2_generic_bast_func(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres,
int level)
static void ocfs2_blocking_ast(void *opaque, int level)
{
struct ocfs2_lock_res *lockres = opaque;
struct ocfs2_super *osb = ocfs2_get_lockres_osb(lockres);
int needs_downconvert;
unsigned long flags;
mlog_entry_void();
BUG_ON(level <= LKM_NLMODE);
mlog(0, "BAST fired for lockres %s, blocking %d, level %d type %s\n",
lockres->l_name, level, lockres->l_level,
ocfs2_lock_type_string(lockres->l_type));
spin_lock_irqsave(&lockres->l_lock, flags);
needs_downconvert = ocfs2_generic_handle_bast(lockres, level);
if (needs_downconvert)
ocfs2_schedule_blocked_lock(osb, lockres);
spin_unlock_irqrestore(&lockres->l_lock, flags);
ocfs2_kick_vote_thread(osb);
wake_up(&lockres->l_event);
mlog_exit_void();
}
static void ocfs2_inode_bast_func(void *opaque, int level)
{
struct ocfs2_lock_res *lockres = opaque;
struct inode *inode;
struct ocfs2_super *osb;
mlog_entry_void();
BUG_ON(!ocfs2_is_inode_lock(lockres));
inode = ocfs2_lock_res_inode(lockres);
osb = OCFS2_SB(inode->i_sb);
mlog(0, "BAST fired for inode %llu, blocking %d, level %d type %s\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno, level,
lockres->l_level, ocfs2_lock_type_string(lockres->l_type));
ocfs2_generic_bast_func(osb, lockres, level);
mlog_exit_void();
ocfs2_kick_vote_thread(osb);
}
static void ocfs2_generic_ast_func(struct ocfs2_lock_res *lockres,
int ignore_refresh)
static void ocfs2_locking_ast(void *opaque)
{
struct ocfs2_lock_res *lockres = opaque;
struct dlm_lockstatus *lksb = &lockres->l_lksb;
unsigned long flags;
......@@ -673,6 +717,7 @@ static void ocfs2_generic_ast_func(struct ocfs2_lock_res *lockres,
switch(lockres->l_action) {
case OCFS2_AST_ATTACH:
ocfs2_generic_handle_attach_action(lockres);
lockres_clear_flags(lockres, OCFS2_LOCK_LOCAL);
break;
case OCFS2_AST_CONVERT:
ocfs2_generic_handle_convert_action(lockres);
......@@ -681,80 +726,19 @@ static void ocfs2_generic_ast_func(struct ocfs2_lock_res *lockres,
ocfs2_generic_handle_downconvert_action(lockres);
break;
default:
mlog(ML_ERROR, "lockres %s: ast fired with invalid action: %u "
"lockres flags = 0x%lx, unlock action: %u\n",
lockres->l_name, lockres->l_action, lockres->l_flags,
lockres->l_unlock_action);
BUG();
}
if (ignore_refresh)
lockres_clear_flags(lockres, OCFS2_LOCK_NEEDS_REFRESH);
/* set it to something invalid so if we get called again we
* can catch it. */
lockres->l_action = OCFS2_AST_INVALID;
spin_unlock_irqrestore(&lockres->l_lock, flags);
wake_up(&lockres->l_event);
}
static void ocfs2_super_ast_func(void *opaque)
{
struct ocfs2_lock_res *lockres = opaque;
mlog_entry_void();
mlog(0, "Superblock AST fired\n");
BUG_ON(!ocfs2_is_super_lock(lockres));
ocfs2_generic_ast_func(lockres, 0);
mlog_exit_void();
}
static void ocfs2_super_bast_func(void *opaque,
int level)
{
struct ocfs2_lock_res *lockres = opaque;
struct ocfs2_super *osb;
mlog_entry_void();
mlog(0, "Superblock BAST fired\n");
BUG_ON(!ocfs2_is_super_lock(lockres));
osb = ocfs2_lock_res_super(lockres);
ocfs2_generic_bast_func(osb, lockres, level);
mlog_exit_void();
}
static void ocfs2_rename_ast_func(void *opaque)
{
struct ocfs2_lock_res *lockres = opaque;
mlog_entry_void();
mlog(0, "Rename AST fired\n");
BUG_ON(!ocfs2_is_rename_lock(lockres));
ocfs2_generic_ast_func(lockres, 1);
mlog_exit_void();
}
static void ocfs2_rename_bast_func(void *opaque,
int level)
{
struct ocfs2_lock_res *lockres = opaque;
struct ocfs2_super *osb;
mlog_entry_void();
mlog(0, "Rename BAST fired\n");
BUG_ON(!ocfs2_is_rename_lock(lockres));
osb = ocfs2_lock_res_super(lockres);
ocfs2_generic_bast_func(osb, lockres, level);
mlog_exit_void();
spin_unlock_irqrestore(&lockres->l_lock, flags);
}
static inline void ocfs2_recover_from_dlm_error(struct ocfs2_lock_res *lockres,
......@@ -810,9 +794,10 @@ static int ocfs2_lock_create(struct ocfs2_super *osb,
&lockres->l_lksb,
dlm_flags,
lockres->l_name,
lockres->l_ops->ast,
OCFS2_LOCK_ID_MAX_LEN - 1,
ocfs2_locking_ast,
lockres,
lockres->l_ops->bast);
ocfs2_blocking_ast);
if (status != DLM_NORMAL) {
ocfs2_log_dlm_error("dlmlock", status, lockres);
ret = -EINVAL;
......@@ -930,6 +915,9 @@ static int ocfs2_cluster_lock(struct ocfs2_super *osb,
ocfs2_init_mask_waiter(&mw);
if (lockres->l_ops->flags & LOCK_TYPE_USES_LVB)
lkm_flags |= LKM_VALBLK;
again:
wait = 0;
......@@ -997,11 +985,12 @@ static int ocfs2_cluster_lock(struct ocfs2_super *osb,
status = dlmlock(osb->dlm,
level,
&lockres->l_lksb,
lkm_flags|LKM_CONVERT|LKM_VALBLK,
lkm_flags|LKM_CONVERT,
lockres->l_name,
lockres->l_ops->ast,
OCFS2_LOCK_ID_MAX_LEN - 1,
ocfs2_locking_ast,
lockres,
lockres->l_ops->bast);
ocfs2_blocking_ast);
if (status != DLM_NORMAL) {
if ((lkm_flags & LKM_NOQUEUE) &&
(status == DLM_NOTQUEUED))
......@@ -1074,18 +1063,21 @@ static void ocfs2_cluster_unlock(struct ocfs2_super *osb,
mlog_exit_void();
}
static int ocfs2_create_new_inode_lock(struct inode *inode,
struct ocfs2_lock_res *lockres)
int ocfs2_create_new_lock(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres,
int ex,
int local)
{
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
int level = ex ? LKM_EXMODE : LKM_PRMODE;
unsigned long flags;
int lkm_flags = local ? LKM_LOCAL : 0;
spin_lock_irqsave(&lockres->l_lock, flags);
BUG_ON(lockres->l_flags & OCFS2_LOCK_ATTACHED);
lockres_or_flags(lockres, OCFS2_LOCK_LOCAL);
spin_unlock_irqrestore(&lockres->l_lock, flags);
return ocfs2_lock_create(osb, lockres, LKM_EXMODE, LKM_LOCAL);
return ocfs2_lock_create(osb, lockres, level, lkm_flags);
}
/* Grants us an EX lock on the data and metadata resources, skipping
......@@ -1097,6 +1089,7 @@ static int ocfs2_create_new_inode_lock(struct inode *inode,
int ocfs2_create_new_inode_locks(struct inode *inode)
{
int ret;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
BUG_ON(!inode);
BUG_ON(!ocfs2_inode_is_new(inode));
......@@ -1113,22 +1106,23 @@ int ocfs2_create_new_inode_locks(struct inode *inode)
* on a resource which has an invalid one -- we'll set it
* valid when we release the EX. */
ret = ocfs2_create_new_inode_lock(inode,
&OCFS2_I(inode)->ip_rw_lockres);
ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_rw_lockres, 1, 1);
if (ret) {
mlog_errno(ret);
goto bail;
}
ret = ocfs2_create_new_inode_lock(inode,
&OCFS2_I(inode)->ip_meta_lockres);
/*
* We don't want to use LKM_LOCAL on a meta data lock as they
* don't use a generation in their lock names.
*/
ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_meta_lockres, 1, 0);
if (ret) {
mlog_errno(ret);
goto bail;
}
ret = ocfs2_create_new_inode_lock(inode,
&OCFS2_I(inode)->ip_data_lockres);
ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_data_lockres, 1, 1);
if (ret) {
mlog_errno(ret);
goto bail;
......@@ -1317,7 +1311,17 @@ static void __ocfs2_stuff_meta_lvb(struct inode *inode)
lvb = (struct ocfs2_meta_lvb *) lockres->l_lksb.lvb;
lvb->lvb_version = cpu_to_be32(OCFS2_LVB_VERSION);
/*
* Invalidate the LVB of a deleted inode - this way other
* nodes are forced to go to disk and discover the new inode
* status.
*/
if (oi->ip_flags & OCFS2_INODE_DELETED) {
lvb->lvb_version = 0;
goto out;
}
lvb->lvb_version = OCFS2_LVB_VERSION;
lvb->lvb_isize = cpu_to_be64(i_size_read(inode));
lvb->lvb_iclusters = cpu_to_be32(oi->ip_clusters);
lvb->lvb_iuid = cpu_to_be32(inode->i_uid);
......@@ -1331,7 +1335,9 @@ static void __ocfs2_stuff_meta_lvb(struct inode *inode)
lvb->lvb_imtime_packed =
cpu_to_be64(ocfs2_pack_timespec(&inode->i_mtime));
lvb->lvb_iattr = cpu_to_be32(oi->ip_attr);
lvb->lvb_igeneration = cpu_to_be32(inode->i_generation);
out:
mlog_meta_lvb(0, lockres);
mlog_exit_void();
......@@ -1386,11 +1392,13 @@ static void ocfs2_refresh_inode_from_lvb(struct inode *inode)
mlog_exit_void();
}
static inline int ocfs2_meta_lvb_is_trustable(struct ocfs2_lock_res *lockres)
static inline int ocfs2_meta_lvb_is_trustable(struct inode *inode,
struct ocfs2_lock_res *lockres)
{
struct ocfs2_meta_lvb *lvb = (struct ocfs2_meta_lvb *) lockres->l_lksb.lvb;
if (be32_to_cpu(lvb->lvb_version) == OCFS2_LVB_VERSION)
if (lvb->lvb_version == OCFS2_LVB_VERSION
&& be32_to_cpu(lvb->lvb_igeneration) == inode->i_generation)
return 1;
return 0;
}
......@@ -1487,7 +1495,7 @@ static int ocfs2_meta_lock_update(struct inode *inode,
* map (directories, bitmap files, etc) */
ocfs2_extent_map_trunc(inode, 0);
if (ocfs2_meta_lvb_is_trustable(lockres)) {
if (ocfs2_meta_lvb_is_trustable(inode, lockres)) {
mlog(0, "Trusting LVB on inode %llu\n",
(unsigned long long)oi->ip_blkno);
ocfs2_refresh_inode_from_lvb(inode);
......@@ -1628,6 +1636,18 @@ int ocfs2_meta_lock_full(struct inode *inode,
wait_event(osb->recovery_event,
ocfs2_node_map_is_empty(osb, &osb->recovery_map));
/*
* We only see this flag if we're being called from
* ocfs2_read_locked_inode(). It means we're locking an inode
* which hasn't been populated yet, so clear the refresh flag
* and let the caller handle it.
*/
if (inode->i_state & I_NEW) {
status = 0;
ocfs2_complete_lock_res_refresh(lockres, 0);
goto bail;
}
/* This is fun. The caller may want a bh back, or it may
* not. ocfs2_meta_lock_update definitely wants one in, but
* may or may not read one, depending on what's in the
......@@ -1807,6 +1827,34 @@ void ocfs2_rename_unlock(struct ocfs2_super *osb)
ocfs2_cluster_unlock(osb, lockres, LKM_EXMODE);
}
int ocfs2_dentry_lock(struct dentry *dentry, int ex)
{
int ret;
int level = ex ? LKM_EXMODE : LKM_PRMODE;
struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
BUG_ON(!dl);
if (ocfs2_is_hard_readonly(osb))
return -EROFS;
ret = ocfs2_cluster_lock(osb, &dl->dl_lockres, level, 0, 0);
if (ret < 0)
mlog_errno(ret);
return ret;
}
void ocfs2_dentry_unlock(struct dentry *dentry, int ex)
{
int level = ex ? LKM_EXMODE : LKM_PRMODE;
struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
ocfs2_cluster_unlock(osb, &dl->dl_lockres, level);
}
/* Reference counting of the dlm debug structure. We want this because
* open references on the debug inodes can live on after a mount, so
* we can't rely on the ocfs2_super to always exist. */
......@@ -1937,9 +1985,16 @@ static int ocfs2_dlm_seq_show(struct seq_file *m, void *v)
if (!lockres)
return -EINVAL;
seq_printf(m, "0x%x\t"
"%.*s\t"
"%d\t"
seq_printf(m, "0x%x\t", OCFS2_DLM_DEBUG_STR_VERSION);
if (lockres->l_type == OCFS2_LOCK_TYPE_DENTRY)
seq_printf(m, "%.*s%08x\t", OCFS2_DENTRY_LOCK_INO_START - 1,
lockres->l_name,
(unsigned int)ocfs2_get_dentry_lock_ino(lockres));
else
seq_printf(m, "%.*s\t", OCFS2_LOCK_ID_MAX_LEN, lockres->l_name);
seq_printf(m, "%d\t"
"0x%lx\t"
"0x%x\t"
"0x%x\t"
......@@ -1947,8 +2002,6 @@ static int ocfs2_dlm_seq_show(struct seq_file *m, void *v)
"%u\t"
"%d\t"
"%d\t",
OCFS2_DLM_DEBUG_STR_VERSION,
OCFS2_LOCK_ID_MAX_LEN, lockres->l_name,
lockres->l_level,
lockres->l_flags,
lockres->l_action,
......@@ -2138,7 +2191,7 @@ void ocfs2_dlm_shutdown(struct ocfs2_super *osb)
mlog_exit_void();
}
static void ocfs2_unlock_ast_func(void *opaque, enum dlm_status status)
static void ocfs2_unlock_ast(void *opaque, enum dlm_status status)
{
struct ocfs2_lock_res *lockres = opaque;
unsigned long flags;
......@@ -2194,24 +2247,20 @@ static void ocfs2_unlock_ast_func(void *opaque, enum dlm_status status)
mlog_exit_void();
}
typedef void (ocfs2_pre_drop_cb_t)(struct ocfs2_lock_res *, void *);
struct drop_lock_cb {
ocfs2_pre_drop_cb_t *drop_func;
void *drop_data;
};
static int ocfs2_drop_lock(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres,
struct drop_lock_cb *dcb)
struct ocfs2_lock_res *lockres)
{
enum dlm_status status;
unsigned long flags;
int lkm_flags = 0;
/* We didn't get anywhere near actually using this lockres. */
if (!(lockres->l_flags & OCFS2_LOCK_INITIALIZED))
goto out;
if (lockres->l_ops->flags & LOCK_TYPE_USES_LVB)
lkm_flags |= LKM_VALBLK;
spin_lock_irqsave(&lockres->l_lock, flags);
mlog_bug_on_msg(!(lockres->l_flags & OCFS2_LOCK_FREEING),
......@@ -2234,8 +2283,12 @@ static int ocfs2_drop_lock(struct ocfs2_super *osb,
spin_lock_irqsave(&lockres->l_lock, flags);
}
if (dcb)
dcb->drop_func(lockres, dcb->drop_data);
if (lockres->l_ops->flags & LOCK_TYPE_USES_LVB) {
if (lockres->l_flags & OCFS2_LOCK_ATTACHED &&
lockres->l_level == LKM_EXMODE &&
!(lockres->l_flags & OCFS2_LOCK_NEEDS_REFRESH))
lockres->l_ops->set_lvb(lockres);
}
if (lockres->l_flags & OCFS2_LOCK_BUSY)
mlog(ML_ERROR, "destroying busy lock: \"%s\"\n",
......@@ -2261,8 +2314,8 @@ static int ocfs2_drop_lock(struct ocfs2_super *osb,
mlog(0, "lock %s\n", lockres->l_name);
status = dlmunlock(osb->dlm, &lockres->l_lksb, LKM_VALBLK,
lockres->l_ops->unlock_ast, lockres);
status = dlmunlock(osb->dlm, &lockres->l_lksb, lkm_flags,
ocfs2_unlock_ast, lockres);
if (status != DLM_NORMAL) {
ocfs2_log_dlm_error("dlmunlock", status, lockres);
mlog(ML_ERROR, "lockres flags: %lu\n", lockres->l_flags);
......@@ -2309,43 +2362,26 @@ void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres)
spin_unlock_irqrestore(&lockres->l_lock, flags);
}
static void ocfs2_drop_osb_locks(struct ocfs2_super *osb)
void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres)
{
int status;
mlog_entry_void();
ocfs2_mark_lockres_freeing(&osb->osb_super_lockres);
status = ocfs2_drop_lock(osb, &osb->osb_super_lockres, NULL);
if (status < 0)
mlog_errno(status);
ocfs2_mark_lockres_freeing(&osb->osb_rename_lockres);
status = ocfs2_drop_lock(osb, &osb->osb_rename_lockres, NULL);
if (status < 0)
mlog_errno(status);
int ret;
mlog_exit(status);
ocfs2_mark_lockres_freeing(lockres);
ret = ocfs2_drop_lock(osb, lockres);
if (ret)
mlog_errno(ret);
}
static void ocfs2_meta_pre_drop(struct ocfs2_lock_res *lockres, void *data)
static void ocfs2_drop_osb_locks(struct ocfs2_super *osb)
{
struct inode *inode = data;
/* the metadata lock requires a bit more work as we have an
* LVB to worry about. */
if (lockres->l_flags & OCFS2_LOCK_ATTACHED &&
lockres->l_level == LKM_EXMODE &&
!(lockres->l_flags & OCFS2_LOCK_NEEDS_REFRESH))
__ocfs2_stuff_meta_lvb(inode);
ocfs2_simple_drop_lockres(osb, &osb->osb_super_lockres);
ocfs2_simple_drop_lockres(osb, &osb->osb_rename_lockres);
}
int ocfs2_drop_inode_locks(struct inode *inode)
{
int status, err;
struct drop_lock_cb meta_dcb = { ocfs2_meta_pre_drop, inode, };
mlog_entry_void();
......@@ -2353,24 +2389,21 @@ int ocfs2_drop_inode_locks(struct inode *inode)
* ocfs2_clear_inode has done it for us. */
err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb),
&OCFS2_I(inode)->ip_data_lockres,
NULL);
&OCFS2_I(inode)->ip_data_lockres);
if (err < 0)
mlog_errno(err);
status = err;
err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb),
&OCFS2_I(inode)->ip_meta_lockres,
&meta_dcb);
&OCFS2_I(inode)->ip_meta_lockres);
if (err < 0)
mlog_errno(err);
if (err < 0 && !status)
status = err;
err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb),
&OCFS2_I(inode)->ip_rw_lockres,
NULL);
&OCFS2_I(inode)->ip_rw_lockres);
if (err < 0)
mlog_errno(err);
if (err < 0 && !status)
......@@ -2419,9 +2452,10 @@ static int ocfs2_downconvert_lock(struct ocfs2_super *osb,
&lockres->l_lksb,
dlm_flags,
lockres->l_name,
lockres->l_ops->ast,
OCFS2_LOCK_ID_MAX_LEN - 1,
ocfs2_locking_ast,
lockres,
lockres->l_ops->bast);
ocfs2_blocking_ast);
if (status != DLM_NORMAL) {
ocfs2_log_dlm_error("dlmlock", status, lockres);
ret = -EINVAL;
......@@ -2480,7 +2514,7 @@ static int ocfs2_cancel_convert(struct ocfs2_super *osb,
status = dlmunlock(osb->dlm,
&lockres->l_lksb,
LKM_CANCEL,
lockres->l_ops->unlock_ast,
ocfs2_unlock_ast,
lockres);
if (status != DLM_NORMAL) {
ocfs2_log_dlm_error("dlmunlock", status, lockres);
......@@ -2494,115 +2528,15 @@ static int ocfs2_cancel_convert(struct ocfs2_super *osb,
return ret;
}
static inline int ocfs2_can_downconvert_meta_lock(struct inode *inode,
struct ocfs2_lock_res *lockres,
int new_level)
{
int ret;
mlog_entry_void();
BUG_ON(new_level != LKM_NLMODE && new_level != LKM_PRMODE);
if (lockres->l_flags & OCFS2_LOCK_REFRESHING) {
ret = 0;
mlog(0, "lockres %s currently being refreshed -- backing "
"off!\n", lockres->l_name);
} else if (new_level == LKM_PRMODE)
ret = !lockres->l_ex_holders &&
ocfs2_inode_fully_checkpointed(inode);
else /* Must be NLMODE we're converting to. */
ret = !lockres->l_ro_holders && !lockres->l_ex_holders &&
ocfs2_inode_fully_checkpointed(inode);
mlog_exit(ret);
return ret;
}
static int ocfs2_do_unblock_meta(struct inode *inode,
int *requeue)
{
int new_level;
int set_lvb = 0;
int ret = 0;
struct ocfs2_lock_res *lockres = &OCFS2_I(inode)->ip_meta_lockres;
unsigned long flags;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
mlog_entry_void();
spin_lock_irqsave(&lockres->l_lock, flags);
BUG_ON(!(lockres->l_flags & OCFS2_LOCK_BLOCKED));
mlog(0, "l_level=%d, l_blocking=%d\n", lockres->l_level,
lockres->l_blocking);
BUG_ON(lockres->l_level != LKM_EXMODE &&
lockres->l_level != LKM_PRMODE);
if (lockres->l_flags & OCFS2_LOCK_BUSY) {
*requeue = 1;
ret = ocfs2_prepare_cancel_convert(osb, lockres);
spin_unlock_irqrestore(&lockres->l_lock, flags);
if (ret) {
ret = ocfs2_cancel_convert(osb, lockres);
if (ret < 0)
mlog_errno(ret);
}
goto leave;
}
new_level = ocfs2_highest_compat_lock_level(lockres->l_blocking);
mlog(0, "l_level=%d, l_blocking=%d, new_level=%d\n",
lockres->l_level, lockres->l_blocking, new_level);
if (ocfs2_can_downconvert_meta_lock(inode, lockres, new_level)) {
if (lockres->l_level == LKM_EXMODE)
set_lvb = 1;
/* If the lock hasn't been refreshed yet (rare), then
* our memory inode values are old and we skip
* stuffing the lvb. There's no need to actually clear
* out the lvb here as it's value is still valid. */
if (!(lockres->l_flags & OCFS2_LOCK_NEEDS_REFRESH)) {
if (set_lvb)
__ocfs2_stuff_meta_lvb(inode);
} else
mlog(0, "lockres %s: downconverting stale lock!\n",
lockres->l_name);
mlog(0, "calling ocfs2_downconvert_lock with l_level=%d, "
"l_blocking=%d, new_level=%d\n",
lockres->l_level, lockres->l_blocking, new_level);
ocfs2_prepare_downconvert(lockres, new_level);
spin_unlock_irqrestore(&lockres->l_lock, flags);
ret = ocfs2_downconvert_lock(osb, lockres, new_level, set_lvb);
goto leave;
}
if (!ocfs2_inode_fully_checkpointed(inode))
ocfs2_start_checkpoint(osb);
*requeue = 1;
spin_unlock_irqrestore(&lockres->l_lock, flags);
ret = 0;
leave:
mlog_exit(ret);
return ret;
}
static int ocfs2_generic_unblock_lock(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres,
int *requeue,
ocfs2_convert_worker_t *worker)
static int ocfs2_unblock_lock(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres,
struct ocfs2_unblock_ctl *ctl)
{
unsigned long flags;
int blocking;
int new_level;
int ret = 0;
int set_lvb = 0;
mlog_entry_void();
......@@ -2612,7 +2546,7 @@ static int ocfs2_generic_unblock_lock(struct ocfs2_super *osb,
recheck:
if (lockres->l_flags & OCFS2_LOCK_BUSY) {
*requeue = 1;
ctl->requeue = 1;
ret = ocfs2_prepare_cancel_convert(osb, lockres);
spin_unlock_irqrestore(&lockres->l_lock, flags);
if (ret) {
......@@ -2626,27 +2560,33 @@ static int ocfs2_generic_unblock_lock(struct ocfs2_super *osb,
/* if we're blocking an exclusive and we have *any* holders,
* then requeue. */
if ((lockres->l_blocking == LKM_EXMODE)
&& (lockres->l_ex_holders || lockres->l_ro_holders)) {
spin_unlock_irqrestore(&lockres->l_lock, flags);
*requeue = 1;
ret = 0;
goto leave;
}
&& (lockres->l_ex_holders || lockres->l_ro_holders))
goto leave_requeue;
/* If it's a PR we're blocking, then only
* requeue if we've got any EX holders */
if (lockres->l_blocking == LKM_PRMODE &&
lockres->l_ex_holders) {
spin_unlock_irqrestore(&lockres->l_lock, flags);
*requeue = 1;
ret = 0;
goto leave;
}
lockres->l_ex_holders)
goto leave_requeue;
/*
* Can we get a lock in this state if the holder counts are
* zero? The meta data unblock code used to check this.
*/
if ((lockres->l_ops->flags & LOCK_TYPE_REQUIRES_REFRESH)
&& (lockres->l_flags & OCFS2_LOCK_REFRESHING))
goto leave_requeue;
new_level = ocfs2_highest_compat_lock_level(lockres->l_blocking);
if (lockres->l_ops->check_downconvert
&& !lockres->l_ops->check_downconvert(lockres, new_level))
goto leave_requeue;
/* If we get here, then we know that there are no more
* incompatible holders (and anyone asking for an incompatible
* lock is blocked). We can now downconvert the lock */
if (!worker)
if (!lockres->l_ops->downconvert_worker)
goto downconvert;
/* Some lockres types want to do a bit of work before
......@@ -2656,7 +2596,10 @@ static int ocfs2_generic_unblock_lock(struct ocfs2_super *osb,
blocking = lockres->l_blocking;
spin_unlock_irqrestore(&lockres->l_lock, flags);
worker(lockres, blocking);
ctl->unblock_action = lockres->l_ops->downconvert_worker(lockres, blocking);
if (ctl->unblock_action == UNBLOCK_STOP_POST)
goto leave;
spin_lock_irqsave(&lockres->l_lock, flags);
if (blocking != lockres->l_blocking) {
......@@ -2666,25 +2609,43 @@ static int ocfs2_generic_unblock_lock(struct ocfs2_super *osb,
}
downconvert:
*requeue = 0;
new_level = ocfs2_highest_compat_lock_level(lockres->l_blocking);
ctl->requeue = 0;
if (lockres->l_ops->flags & LOCK_TYPE_USES_LVB) {
if (lockres->l_level == LKM_EXMODE)
set_lvb = 1;
/*
* We only set the lvb if the lock has been fully
* refreshed - otherwise we risk setting stale
* data. Otherwise, there's no need to actually clear
* out the lvb here as it's value is still valid.
*/
if (set_lvb && !(lockres->l_flags & OCFS2_LOCK_NEEDS_REFRESH))
lockres->l_ops->set_lvb(lockres);
}
ocfs2_prepare_downconvert(lockres, new_level);
spin_unlock_irqrestore(&lockres->l_lock, flags);
ret = ocfs2_downconvert_lock(osb, lockres, new_level, 0);
ret = ocfs2_downconvert_lock(osb, lockres, new_level, set_lvb);
leave:
mlog_exit(ret);
return ret;
leave_requeue:
spin_unlock_irqrestore(&lockres->l_lock, flags);
ctl->requeue = 1;
mlog_exit(0);
return 0;
}
static void ocfs2_data_convert_worker(struct ocfs2_lock_res *lockres,
int blocking)
static int ocfs2_data_convert_worker(struct ocfs2_lock_res *lockres,
int blocking)
{
struct inode *inode;
struct address_space *mapping;
mlog_entry_void();
inode = ocfs2_lock_res_inode(lockres);
mapping = inode->i_mapping;
......@@ -2705,116 +2666,159 @@ static void ocfs2_data_convert_worker(struct ocfs2_lock_res *lockres,
filemap_fdatawait(mapping);
}
mlog_exit_void();
return UNBLOCK_CONTINUE;
}
int ocfs2_unblock_data(struct ocfs2_lock_res *lockres,
int *requeue)
static int ocfs2_check_meta_downconvert(struct ocfs2_lock_res *lockres,
int new_level)
{
int status;
struct inode *inode;
struct ocfs2_super *osb;
mlog_entry_void();
inode = ocfs2_lock_res_inode(lockres);
osb = OCFS2_SB(inode->i_sb);
mlog(0, "unblock inode %llu\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno);
struct inode *inode = ocfs2_lock_res_inode(lockres);
int checkpointed = ocfs2_inode_fully_checkpointed(inode);
status = ocfs2_generic_unblock_lock(osb,
lockres,
requeue,
ocfs2_data_convert_worker);
if (status < 0)
mlog_errno(status);
BUG_ON(new_level != LKM_NLMODE && new_level != LKM_PRMODE);
BUG_ON(lockres->l_level != LKM_EXMODE && !checkpointed);
mlog(0, "inode %llu, requeue = %d\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno, *requeue);
if (checkpointed)
return 1;
mlog_exit(status);
return status;
ocfs2_start_checkpoint(OCFS2_SB(inode->i_sb));
return 0;
}
static int ocfs2_unblock_inode_lock(struct ocfs2_lock_res *lockres,
int *requeue)
static void ocfs2_set_meta_lvb(struct ocfs2_lock_res *lockres)
{
int status;
struct inode *inode;
mlog_entry_void();
mlog(0, "Unblock lockres %s\n", lockres->l_name);
inode = ocfs2_lock_res_inode(lockres);
struct inode *inode = ocfs2_lock_res_inode(lockres);
status = ocfs2_generic_unblock_lock(OCFS2_SB(inode->i_sb),
lockres,
requeue,
NULL);
if (status < 0)
mlog_errno(status);
mlog_exit(status);
return status;
__ocfs2_stuff_meta_lvb(inode);
}
int ocfs2_unblock_meta(struct ocfs2_lock_res *lockres,
int *requeue)
/*
* Does the final reference drop on our dentry lock. Right now this
* happens in the vote thread, but we could choose to simplify the
* dlmglue API and push these off to the ocfs2_wq in the future.
*/
static void ocfs2_dentry_post_unlock(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres)
{
int status;
struct inode *inode;
mlog_entry_void();
struct ocfs2_dentry_lock *dl = ocfs2_lock_res_dl(lockres);
ocfs2_dentry_lock_put(osb, dl);
}
inode = ocfs2_lock_res_inode(lockres);
/*
* d_delete() matching dentries before the lock downconvert.
*
* At this point, any process waiting to destroy the
* dentry_lock due to last ref count is stopped by the
* OCFS2_LOCK_QUEUED flag.
*
* We have two potential problems
*
* 1) If we do the last reference drop on our dentry_lock (via dput)
* we'll wind up in ocfs2_release_dentry_lock(), waiting on
* the downconvert to finish. Instead we take an elevated
* reference and push the drop until after we've completed our
* unblock processing.
*
* 2) There might be another process with a final reference,
* waiting on us to finish processing. If this is the case, we
* detect it and exit out - there's no more dentries anyway.
*/
static int ocfs2_dentry_convert_worker(struct ocfs2_lock_res *lockres,
int blocking)
{
struct ocfs2_dentry_lock *dl = ocfs2_lock_res_dl(lockres);
struct ocfs2_inode_info *oi = OCFS2_I(dl->dl_inode);
struct dentry *dentry;
unsigned long flags;
int extra_ref = 0;
mlog(0, "unblock inode %llu\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno);
/*
* This node is blocking another node from getting a read
* lock. This happens when we've renamed within a
* directory. We've forced the other nodes to d_delete(), but
* we never actually dropped our lock because it's still
* valid. The downconvert code will retain a PR for this node,
* so there's no further work to do.
*/
if (blocking == LKM_PRMODE)
return UNBLOCK_CONTINUE;
status = ocfs2_do_unblock_meta(inode, requeue);
if (status < 0)
mlog_errno(status);
/*
* Mark this inode as potentially orphaned. The code in
* ocfs2_delete_inode() will figure out whether it actually
* needs to be freed or not.
*/
spin_lock(&oi->ip_lock);
oi->ip_flags |= OCFS2_INODE_MAYBE_ORPHANED;
spin_unlock(&oi->ip_lock);
mlog(0, "inode %llu, requeue = %d\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno, *requeue);
/*
* Yuck. We need to make sure however that the check of
* OCFS2_LOCK_FREEING and the extra reference are atomic with
* respect to a reference decrement or the setting of that
* flag.
*/
spin_lock_irqsave(&lockres->l_lock, flags);
spin_lock(&dentry_attach_lock);
if (!(lockres->l_flags & OCFS2_LOCK_FREEING)
&& dl->dl_count) {
dl->dl_count++;
extra_ref = 1;
}
spin_unlock(&dentry_attach_lock);
spin_unlock_irqrestore(&lockres->l_lock, flags);
mlog_exit(status);
return status;
}
mlog(0, "extra_ref = %d\n", extra_ref);
/* Generic unblock function for any lockres whose private data is an
* ocfs2_super pointer. */
static int ocfs2_unblock_osb_lock(struct ocfs2_lock_res *lockres,
int *requeue)
{
int status;
struct ocfs2_super *osb;
/*
* We have a process waiting on us in ocfs2_dentry_iput(),
* which means we can't have any more outstanding
* aliases. There's no need to do any more work.
*/
if (!extra_ref)
return UNBLOCK_CONTINUE;
spin_lock(&dentry_attach_lock);
while (1) {
dentry = ocfs2_find_local_alias(dl->dl_inode,
dl->dl_parent_blkno, 1);
if (!dentry)
break;
spin_unlock(&dentry_attach_lock);
mlog_entry_void();
mlog(0, "d_delete(%.*s);\n", dentry->d_name.len,
dentry->d_name.name);
mlog(0, "Unblock lockres %s\n", lockres->l_name);
/*
* The following dcache calls may do an
* iput(). Normally we don't want that from the
* downconverting thread, but in this case it's ok
* because the requesting node already has an
* exclusive lock on the inode, so it can't be queued
* for a downconvert.
*/
d_delete(dentry);
dput(dentry);
osb = ocfs2_lock_res_super(lockres);
spin_lock(&dentry_attach_lock);
}
spin_unlock(&dentry_attach_lock);
status = ocfs2_generic_unblock_lock(osb,
lockres,
requeue,
NULL);
if (status < 0)
mlog_errno(status);
/*
* If we are the last holder of this dentry lock, there is no
* reason to downconvert so skip straight to the unlock.
*/
if (dl->dl_count == 1)
return UNBLOCK_STOP_POST;
mlog_exit(status);
return status;
return UNBLOCK_CONTINUE_POST;
}
void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres)
{
int status;
int requeue = 0;
struct ocfs2_unblock_ctl ctl = {0, 0,};
unsigned long flags;
/* Our reference to the lockres in this function can be
......@@ -2825,7 +2829,6 @@ void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
BUG_ON(!lockres);
BUG_ON(!lockres->l_ops);
BUG_ON(!lockres->l_ops->unblock);
mlog(0, "lockres %s blocked.\n", lockres->l_name);
......@@ -2839,21 +2842,25 @@ void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
goto unqueue;
spin_unlock_irqrestore(&lockres->l_lock, flags);
status = lockres->l_ops->unblock(lockres, &requeue);
status = ocfs2_unblock_lock(osb, lockres, &ctl);
if (status < 0)
mlog_errno(status);
spin_lock_irqsave(&lockres->l_lock, flags);
unqueue:
if (lockres->l_flags & OCFS2_LOCK_FREEING || !requeue) {
if (lockres->l_flags & OCFS2_LOCK_FREEING || !ctl.requeue) {
lockres_clear_flags(lockres, OCFS2_LOCK_QUEUED);
} else
ocfs2_schedule_blocked_lock(osb, lockres);
mlog(0, "lockres %s, requeue = %s.\n", lockres->l_name,
requeue ? "yes" : "no");
ctl.requeue ? "yes" : "no");
spin_unlock_irqrestore(&lockres->l_lock, flags);
if (ctl.unblock_action != UNBLOCK_CONTINUE
&& lockres->l_ops->post_unlock)
lockres->l_ops->post_unlock(osb, lockres);
mlog_exit_void();
}
......@@ -2896,8 +2903,9 @@ void ocfs2_dump_meta_lvb_info(u64 level,
mlog(level, "LVB information for %s (called from %s:%u):\n",
lockres->l_name, function, line);
mlog(level, "version: %u, clusters: %u\n",
be32_to_cpu(lvb->lvb_version), be32_to_cpu(lvb->lvb_iclusters));
mlog(level, "version: %u, clusters: %u, generation: 0x%x\n",
lvb->lvb_version, be32_to_cpu(lvb->lvb_iclusters),
be32_to_cpu(lvb->lvb_igeneration));
mlog(level, "size: %llu, uid %u, gid %u, mode 0x%x\n",
(unsigned long long)be64_to_cpu(lvb->lvb_isize),
be32_to_cpu(lvb->lvb_iuid), be32_to_cpu(lvb->lvb_igid),
......
fs/ocfs2/dlmglue.h
View file @ b7a818e4
......@@ -27,10 +27,14 @@
#ifndef DLMGLUE_H
#define DLMGLUE_H
#define OCFS2_LVB_VERSION 3
#include "dcache.h"
#define OCFS2_LVB_VERSION 4
struct ocfs2_meta_lvb {
__be32 lvb_version;
__u8 lvb_version;
__u8 lvb_reserved0;
__be16 lvb_reserved1;
__be32 lvb_iclusters;
__be32 lvb_iuid;
__be32 lvb_igid;
......@@ -41,7 +45,8 @@ struct ocfs2_meta_lvb {
__be16 lvb_imode;
__be16 lvb_inlink;
__be32 lvb_iattr;
__be32 lvb_reserved[2];
__be32 lvb_igeneration;
__be32 lvb_reserved2;
};
/* ocfs2_meta_lock_full() and ocfs2_data_lock_full() 'arg_flags' flags */
......@@ -57,9 +62,14 @@ void ocfs2_dlm_shutdown(struct ocfs2_super *osb);
void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res);
void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
enum ocfs2_lock_type type,
unsigned int generation,
struct inode *inode);
void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl,
u64 parent, struct inode *inode);
void ocfs2_lock_res_free(struct ocfs2_lock_res *res);
int ocfs2_create_new_inode_locks(struct inode *inode);
int ocfs2_create_new_lock(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres, int ex, int local);
int ocfs2_drop_inode_locks(struct inode *inode);
int ocfs2_data_lock_full(struct inode *inode,
int write,
......@@ -93,7 +103,12 @@ void ocfs2_super_unlock(struct ocfs2_super *osb,
int ex);
int ocfs2_rename_lock(struct ocfs2_super *osb);
void ocfs2_rename_unlock(struct ocfs2_super *osb);
int ocfs2_dentry_lock(struct dentry *dentry, int ex);
void ocfs2_dentry_unlock(struct dentry *dentry, int ex);
void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres);
void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres);
/* for the vote thread */
void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
......
fs/ocfs2/export.c
View file @ b7a818e4
......@@ -33,6 +33,7 @@
#include "dir.h"
#include "dlmglue.h"
#include "dcache.h"
#include "export.h"
#include "inode.h"
......@@ -57,7 +58,7 @@ static struct dentry *ocfs2_get_dentry(struct super_block *sb, void *vobjp)
return ERR_PTR(-ESTALE);
}
inode = ocfs2_iget(OCFS2_SB(sb), handle->ih_blkno);
inode = ocfs2_iget(OCFS2_SB(sb), handle->ih_blkno, 0);
if (IS_ERR(inode)) {
mlog_errno(PTR_ERR(inode));
......@@ -77,6 +78,7 @@ static struct dentry *ocfs2_get_dentry(struct super_block *sb, void *vobjp)
mlog_errno(-ENOMEM);
return ERR_PTR(-ENOMEM);
}
result->d_op = &ocfs2_dentry_ops;
mlog_exit_ptr(result);
return result;
......@@ -113,7 +115,7 @@ static struct dentry *ocfs2_get_parent(struct dentry *child)
goto bail_unlock;
}
inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno);
inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0);
if (IS_ERR(inode)) {
mlog(ML_ERROR, "Unable to create inode %llu\n",
(unsigned long long)blkno);
......@@ -127,6 +129,8 @@ static struct dentry *ocfs2_get_parent(struct dentry *child)
parent = ERR_PTR(-ENOMEM);
}
parent->d_op = &ocfs2_dentry_ops;
bail_unlock:
ocfs2_meta_unlock(dir, 0);
......
fs/ocfs2/inode.c
View file @ b7a818e4
......@@ -54,8 +54,6 @@
#include "buffer_head_io.h"
#define OCFS2_FI_FLAG_NOWAIT 0x1
#define OCFS2_FI_FLAG_DELETE 0x2
struct ocfs2_find_inode_args
{
u64 fi_blkno;
......@@ -109,7 +107,7 @@ struct inode *ocfs2_ilookup_for_vote(struct ocfs2_super *osb,
return ilookup5(osb->sb, args.fi_ino, ocfs2_find_actor, &args);
}
struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno)
struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, int flags)
{
struct inode *inode = NULL;
struct super_block *sb = osb->sb;
......@@ -127,7 +125,7 @@ struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno)
}
args.fi_blkno = blkno;
args.fi_flags = 0;
args.fi_flags = flags;
args.fi_ino = ino_from_blkno(sb, blkno);
inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
......@@ -297,15 +295,11 @@ int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
OCFS2_I(inode)->ip_orphaned_slot = OCFS2_INVALID_SLOT;
OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
if (create_ino)
inode->i_ino = ino_from_blkno(inode->i_sb,
le64_to_cpu(fe->i_blkno));
mlog(0, "blkno = %llu, ino = %lu, create_ino = %s\n",
(unsigned long long)fe->i_blkno, inode->i_ino, create_ino ? "true" : "false");
inode->i_nlink = le16_to_cpu(fe->i_links_count);
if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL))
OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino);
......@@ -343,12 +337,28 @@ int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
break;
}
if (create_ino) {
inode->i_ino = ino_from_blkno(inode->i_sb,
le64_to_cpu(fe->i_blkno));
/*
* If we ever want to create system files from kernel,
* the generation argument to
* ocfs2_inode_lock_res_init() will have to change.
*/
BUG_ON(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL));
ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
OCFS2_LOCK_TYPE_META, 0, inode);
}
ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
OCFS2_LOCK_TYPE_RW, inode);
ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
OCFS2_LOCK_TYPE_META, inode);
OCFS2_LOCK_TYPE_RW, inode->i_generation,
inode);
ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_data_lockres,
OCFS2_LOCK_TYPE_DATA, inode);
OCFS2_LOCK_TYPE_DATA, inode->i_generation,
inode);
ocfs2_set_inode_flags(inode);
inode->i_flags |= S_NOATIME;
......@@ -366,15 +376,15 @@ static int ocfs2_read_locked_inode(struct inode *inode,
struct ocfs2_super *osb;
struct ocfs2_dinode *fe;
struct buffer_head *bh = NULL;
int status;
int sysfile = 0;
int status, can_lock;
u32 generation = 0;
mlog_entry("(0x%p, 0x%p)\n", inode, args);
status = -EINVAL;
if (inode == NULL || inode->i_sb == NULL) {
mlog(ML_ERROR, "bad inode\n");
goto bail;
return status;
}
sb = inode->i_sb;
osb = OCFS2_SB(sb);
......@@ -382,50 +392,110 @@ static int ocfs2_read_locked_inode(struct inode *inode,
if (!args) {
mlog(ML_ERROR, "bad inode args\n");
make_bad_inode(inode);
goto bail;
return status;
}
/*
* To improve performance of cold-cache inode stats, we take
* the cluster lock here if possible.
*
* Generally, OCFS2 never trusts the contents of an inode
* unless it's holding a cluster lock, so taking it here isn't
* a correctness issue as much as it is a performance
* improvement.
*
* There are three times when taking the lock is not a good idea:
*
* 1) During startup, before we have initialized the DLM.
*
* 2) If we are reading certain system files which never get
* cluster locks (local alloc, truncate log).
*
* 3) If the process doing the iget() is responsible for
* orphan dir recovery. We're holding the orphan dir lock and
* can get into a deadlock with another process on another
* node in ->delete_inode().
*
* #1 and #2 can be simply solved by never taking the lock
* here for system files (which are the only type we read
* during mount). It's a heavier approach, but our main
* concern is user-accesible files anyway.
*
* #3 works itself out because we'll eventually take the
* cluster lock before trusting anything anyway.
*/
can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
&& !(args->fi_flags & OCFS2_FI_FLAG_NOLOCK);
/*
* To maintain backwards compatibility with older versions of
* ocfs2-tools, we still store the generation value for system
* files. The only ones that actually matter to userspace are
* the journals, but it's easier and inexpensive to just flag
* all system files similarly.
*/
if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
generation = osb->fs_generation;
ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
OCFS2_LOCK_TYPE_META,
generation, inode);
if (can_lock) {
status = ocfs2_meta_lock(inode, NULL, NULL, 0);
if (status) {
make_bad_inode(inode);
mlog_errno(status);
return status;
}
}
/* Read the FE off disk. This is safe because the kernel only
* does one read_inode2 for a new inode, and if it doesn't
* exist yet then nobody can be working on it! */
status = ocfs2_read_block(osb, args->fi_blkno, &bh, 0, NULL);
status = ocfs2_read_block(osb, args->fi_blkno, &bh, 0,
can_lock ? inode : NULL);
if (status < 0) {
mlog_errno(status);
make_bad_inode(inode);
goto bail;
}
status = -EINVAL;
fe = (struct ocfs2_dinode *) bh->b_data;
if (!OCFS2_IS_VALID_DINODE(fe)) {
mlog(ML_ERROR, "Invalid dinode #%llu: signature = %.*s\n",
(unsigned long long)fe->i_blkno, 7, fe->i_signature);
make_bad_inode(inode);
goto bail;
}
if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL))
sysfile = 1;
/*
* This is a code bug. Right now the caller needs to
* understand whether it is asking for a system file inode or
* not so the proper lock names can be built.
*/
mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
!!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
"Inode %llu: system file state is ambigous\n",
(unsigned long long)args->fi_blkno);
if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
S_ISBLK(le16_to_cpu(fe->i_mode)))
inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
status = -EINVAL;
if (ocfs2_populate_inode(inode, fe, 0) < 0) {
mlog(ML_ERROR, "populate failed! i_blkno=%llu, i_ino=%lu\n",
(unsigned long long)fe->i_blkno, inode->i_ino);
make_bad_inode(inode);
goto bail;
}
BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
if (sysfile)
OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
status = 0;
bail:
if (can_lock)
ocfs2_meta_unlock(inode, 0);
if (status < 0)
make_bad_inode(inode);
if (args && bh)
brelse(bh);
......@@ -898,9 +968,15 @@ void ocfs2_delete_inode(struct inode *inode)
goto bail_unlock_inode;
}
/* Mark the inode as successfully deleted. This is important
* for ocfs2_clear_inode as it will check this flag and skip
* any checkpointing work */
/*
* Mark the inode as successfully deleted.
*
* This is important for ocfs2_clear_inode() as it will check
* this flag and skip any checkpointing work
*
* ocfs2_stuff_meta_lvb() also uses this flag to invalidate
* the LVB for other nodes.
*/
OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
bail_unlock_inode:
......@@ -1025,12 +1101,10 @@ void ocfs2_drop_inode(struct inode *inode)
/* Testing ip_orphaned_slot here wouldn't work because we may
* not have gotten a delete_inode vote from any other nodes
* yet. */
if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED) {
mlog(0, "Inode was orphaned on another node, clearing nlink.\n");
inode->i_nlink = 0;
}
generic_drop_inode(inode);
if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)
generic_delete_inode(inode);
else
generic_drop_inode(inode);
mlog_exit_void();
}
......
fs/ocfs2/inode.h
View file @ b7a818e4
......@@ -122,7 +122,13 @@ struct buffer_head *ocfs2_bread(struct inode *inode, int block,
void ocfs2_clear_inode(struct inode *inode);
void ocfs2_delete_inode(struct inode *inode);
void ocfs2_drop_inode(struct inode *inode);
struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff);
/* Flags for ocfs2_iget() */
#define OCFS2_FI_FLAG_NOWAIT 0x1
#define OCFS2_FI_FLAG_DELETE 0x2
#define OCFS2_FI_FLAG_SYSFILE 0x4
#define OCFS2_FI_FLAG_NOLOCK 0x8
struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, int flags);
struct inode *ocfs2_ilookup_for_vote(struct ocfs2_super *osb,
u64 blkno,
int delete_vote);
......
fs/ocfs2/journal.c
View file @ b7a818e4
......@@ -1493,7 +1493,8 @@ static int ocfs2_queue_orphans(struct ocfs2_super *osb,
if (de->name_len == 2 && !strncmp("..", de->name, 2))
continue;
iter = ocfs2_iget(osb, le64_to_cpu(de->inode));
iter = ocfs2_iget(osb, le64_to_cpu(de->inode),
OCFS2_FI_FLAG_NOLOCK);
if (IS_ERR(iter))
continue;
......
fs/ocfs2/namei.c
View file @ b7a818e4
......@@ -179,7 +179,7 @@ static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
if (status < 0)
goto bail_add;
inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno);
inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0);
if (IS_ERR(inode)) {
mlog(ML_ERROR, "Unable to create inode %llu\n",
(unsigned long long)blkno);
......@@ -199,10 +199,32 @@ static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
spin_unlock(&oi->ip_lock);
bail_add:
dentry->d_op = &ocfs2_dentry_ops;
ret = d_splice_alias(inode, dentry);
if (inode) {
/*
* If d_splice_alias() finds a DCACHE_DISCONNECTED
* dentry, it will d_move() it on top of ourse. The
* return value will indicate this however, so in
* those cases, we switch them around for the locking
* code.
*
* NOTE: This dentry already has ->d_op set from
* ocfs2_get_parent() and ocfs2_get_dentry()
*/
if (ret)
dentry = ret;
status = ocfs2_dentry_attach_lock(dentry, inode,
OCFS2_I(dir)->ip_blkno);
if (status) {
mlog_errno(status);
ret = ERR_PTR(status);
goto bail_unlock;
}
}
bail_unlock:
/* Don't drop the cluster lock until *after* the d_add --
* unlink on another node will message us to remove that
......@@ -418,6 +440,13 @@ static int ocfs2_mknod(struct inode *dir,
goto leave;
}
status = ocfs2_dentry_attach_lock(dentry, inode,
OCFS2_I(dir)->ip_blkno);
if (status) {
mlog_errno(status);
goto leave;
}
insert_inode_hash(inode);
dentry->d_op = &ocfs2_dentry_ops;
d_instantiate(dentry, inode);
......@@ -725,6 +754,12 @@ static int ocfs2_link(struct dentry *old_dentry,
goto bail;
}
err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
if (err) {
mlog_errno(err);
goto bail;
}
atomic_inc(&inode->i_count);
dentry->d_op = &ocfs2_dentry_ops;
d_instantiate(dentry, inode);
......@@ -743,6 +778,23 @@ static int ocfs2_link(struct dentry *old_dentry,
return err;
}
/*
* Takes and drops an exclusive lock on the given dentry. This will
* force other nodes to drop it.
*/
static int ocfs2_remote_dentry_delete(struct dentry *dentry)
{
int ret;
ret = ocfs2_dentry_lock(dentry, 1);
if (ret)
mlog_errno(ret);
else
ocfs2_dentry_unlock(dentry, 1);
return ret;
}
static int ocfs2_unlink(struct inode *dir,
struct dentry *dentry)
{
......@@ -832,8 +884,7 @@ static int ocfs2_unlink(struct inode *dir,
else
inode->i_nlink--;
status = ocfs2_request_unlink_vote(inode, dentry,
(unsigned int) inode->i_nlink);
status = ocfs2_remote_dentry_delete(dentry);
if (status < 0) {
/* This vote should succeed under all normal
* circumstances. */
......@@ -1019,7 +1070,6 @@ static int ocfs2_rename(struct inode *old_dir,
struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir,
// this is the 1st dirent bh
nlink_t old_dir_nlink = old_dir->i_nlink, new_dir_nlink = new_dir->i_nlink;
unsigned int links_count;
/* At some point it might be nice to break this function up a
* bit. */
......@@ -1093,23 +1143,26 @@ static int ocfs2_rename(struct inode *old_dir,
}
}
if (S_ISDIR(old_inode->i_mode)) {
/* Directories actually require metadata updates to
* the directory info so we can't get away with not
* doing node locking on it. */
status = ocfs2_meta_lock(old_inode, handle, NULL, 1);
if (status < 0) {
if (status != -ENOENT)
mlog_errno(status);
goto bail;
}
status = ocfs2_request_rename_vote(old_inode, old_dentry);
if (status < 0) {
/*
* Though we don't require an inode meta data update if
* old_inode is not a directory, we lock anyway here to ensure
* the vote thread on other nodes won't have to concurrently
* downconvert the inode and the dentry locks.
*/
status = ocfs2_meta_lock(old_inode, handle, NULL, 1);
if (status < 0) {
if (status != -ENOENT)
mlog_errno(status);
goto bail;
}
goto bail;
}
status = ocfs2_remote_dentry_delete(old_dentry);
if (status < 0) {
mlog_errno(status);
goto bail;
}
if (S_ISDIR(old_inode->i_mode)) {
status = -EIO;
old_inode_de_bh = ocfs2_bread(old_inode, 0, &status, 0);
if (!old_inode_de_bh)
......@@ -1123,14 +1176,6 @@ static int ocfs2_rename(struct inode *old_dir,
if (!new_inode && new_dir!=old_dir &&
new_dir->i_nlink >= OCFS2_LINK_MAX)
goto bail;
} else {
/* Ah, the simple case - we're a file so just send a
* message. */
status = ocfs2_request_rename_vote(old_inode, old_dentry);
if (status < 0) {
mlog_errno(status);
goto bail;
}
}
status = -ENOENT;
......@@ -1202,13 +1247,7 @@ static int ocfs2_rename(struct inode *old_dir,
goto bail;
}
if (S_ISDIR(new_inode->i_mode))
links_count = 0;
else
links_count = (unsigned int) (new_inode->i_nlink - 1);
status = ocfs2_request_unlink_vote(new_inode, new_dentry,
links_count);
status = ocfs2_remote_dentry_delete(new_dentry);
if (status < 0) {
mlog_errno(status);
goto bail;
......@@ -1387,6 +1426,7 @@ static int ocfs2_rename(struct inode *old_dir,
}
}
ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
status = 0;
bail:
if (rename_lock)
......@@ -1675,6 +1715,12 @@ static int ocfs2_symlink(struct inode *dir,
goto bail;
}
status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
if (status) {
mlog_errno(status);
goto bail;
}
insert_inode_hash(inode);
dentry->d_op = &ocfs2_dentry_ops;
d_instantiate(dentry, inode);
......
fs/ocfs2/ocfs2_lockid.h
View file @ b7a818e4
......@@ -35,12 +35,15 @@
#define OCFS2_LOCK_ID_MAX_LEN 32
#define OCFS2_LOCK_ID_PAD "000000"
#define OCFS2_DENTRY_LOCK_INO_START 18
enum ocfs2_lock_type {
OCFS2_LOCK_TYPE_META = 0,
OCFS2_LOCK_TYPE_DATA,
OCFS2_LOCK_TYPE_SUPER,
OCFS2_LOCK_TYPE_RENAME,
OCFS2_LOCK_TYPE_RW,
OCFS2_LOCK_TYPE_DENTRY,
OCFS2_NUM_LOCK_TYPES
};
......@@ -63,6 +66,9 @@ static inline char ocfs2_lock_type_char(enum ocfs2_lock_type type)
case OCFS2_LOCK_TYPE_RW:
c = 'W';
break;
case OCFS2_LOCK_TYPE_DENTRY:
c = 'N';
break;
default:
c = '\0';
}
......@@ -70,4 +76,23 @@ static inline char ocfs2_lock_type_char(enum ocfs2_lock_type type)
return c;
}
static char *ocfs2_lock_type_strings[] = {
[OCFS2_LOCK_TYPE_META] = "Meta",
[OCFS2_LOCK_TYPE_DATA] = "Data",
[OCFS2_LOCK_TYPE_SUPER] = "Super",
[OCFS2_LOCK_TYPE_RENAME] = "Rename",
/* Need to differntiate from [R]ename.. serializing writes is the
* important job it does, anyway. */
[OCFS2_LOCK_TYPE_RW] = "Write/Read",
[OCFS2_LOCK_TYPE_DENTRY] = "Dentry",
};
static inline const char *ocfs2_lock_type_string(enum ocfs2_lock_type type)
{
#ifdef __KERNEL__
mlog_bug_on_msg(type >= OCFS2_NUM_LOCK_TYPES, "%d\n", type);
#endif
return ocfs2_lock_type_strings[type];
}
#endif /* OCFS2_LOCKID_H */
fs/ocfs2/super.c
View file @ b7a818e4
......@@ -202,7 +202,7 @@ static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
mlog_entry_void();
new = ocfs2_iget(osb, osb->root_blkno);
new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE);
if (IS_ERR(new)) {
status = PTR_ERR(new);
mlog_errno(status);
......@@ -210,7 +210,7 @@ static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
}
osb->root_inode = new;
new = ocfs2_iget(osb, osb->system_dir_blkno);
new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE);
if (IS_ERR(new)) {
status = PTR_ERR(new);
mlog_errno(status);
......@@ -682,7 +682,7 @@ static struct file_system_type ocfs2_fs_type = {
.kill_sb = kill_block_super, /* set to the generic one
* right now, but do we
* need to change that? */
.fs_flags = FS_REQUIRES_DEV,
.fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
.next = NULL
};
......
fs/ocfs2/sysfile.c
View file @ b7a818e4
......@@ -28,11 +28,11 @@
#include <linux/slab.h>
#include <linux/highmem.h>
#include "ocfs2.h"
#define MLOG_MASK_PREFIX ML_INODE
#include <cluster/masklog.h>
#include "ocfs2.h"
#include "alloc.h"
#include "dir.h"
#include "inode.h"
......@@ -115,7 +115,7 @@ static struct inode * _ocfs2_get_system_file_inode(struct ocfs2_super *osb,
goto bail;
}
inode = ocfs2_iget(osb, blkno);
inode = ocfs2_iget(osb, blkno, OCFS2_FI_FLAG_SYSFILE);
if (IS_ERR(inode)) {
mlog_errno(PTR_ERR(inode));
inode = NULL;
......
fs/ocfs2/vote.c
View file @ b7a818e4
......@@ -74,9 +74,6 @@ struct ocfs2_vote_msg
__be32 v_orphaned_slot; /* Used during delete votes */
__be32 v_nlink; /* Used during unlink votes */
} md1; /* Message type dependant 1 */
__be32 v_unlink_namelen;
__be64 v_unlink_parent;
u8 v_unlink_dirent[OCFS2_VOTE_FILENAME_LEN];
};
/* Responses are given these values to maintain backwards
......@@ -100,8 +97,6 @@ struct ocfs2_vote_work {
enum ocfs2_vote_request {
OCFS2_VOTE_REQ_INVALID = 0,
OCFS2_VOTE_REQ_DELETE,
OCFS2_VOTE_REQ_UNLINK,
OCFS2_VOTE_REQ_RENAME,
OCFS2_VOTE_REQ_MOUNT,
OCFS2_VOTE_REQ_UMOUNT,
OCFS2_VOTE_REQ_LAST
......@@ -261,103 +256,13 @@ static int ocfs2_process_delete_request(struct inode *inode,
return response;
}
static int ocfs2_match_dentry(struct dentry *dentry,
u64 parent_blkno,
unsigned int namelen,
const char *name)
{
struct inode *parent;
if (!dentry->d_parent) {
mlog(0, "Detached from parent.\n");
return 0;
}
parent = dentry->d_parent->d_inode;
/* Negative parent dentry? */
if (!parent)
return 0;
/* Name is in a different directory. */
if (OCFS2_I(parent)->ip_blkno != parent_blkno)
return 0;
if (dentry->d_name.len != namelen)
return 0;
/* comparison above guarantees this is safe. */
if (memcmp(dentry->d_name.name, name, namelen))
return 0;
return 1;
}
static void ocfs2_process_dentry_request(struct inode *inode,
int rename,
unsigned int new_nlink,
u64 parent_blkno,
unsigned int namelen,
const char *name)
{
struct dentry *dentry = NULL;
struct list_head *p;
struct ocfs2_inode_info *oi = OCFS2_I(inode);
mlog(0, "parent %llu, namelen = %u, name = %.*s\n",
(unsigned long long)parent_blkno, namelen, namelen, name);
spin_lock(&dcache_lock);
/* Another node is removing this name from the system. It is
* up to us to find the corresponding dentry and if it exists,
* unhash it from the dcache. */
list_for_each(p, &inode->i_dentry) {
dentry = list_entry(p, struct dentry, d_alias);
if (ocfs2_match_dentry(dentry, parent_blkno, namelen, name)) {
mlog(0, "dentry found: %.*s\n",
dentry->d_name.len, dentry->d_name.name);
dget_locked(dentry);
break;
}
dentry = NULL;
}
spin_unlock(&dcache_lock);
if (dentry) {
d_delete(dentry);
dput(dentry);
}
/* rename votes don't send link counts */
if (!rename) {
mlog(0, "new_nlink = %u\n", new_nlink);
/* We don't have the proper locks here to directly
* change i_nlink and besides, the vote is sent
* *before* the operation so it may have failed on the
* other node. This passes a hint to ocfs2_drop_inode
* to force ocfs2_delete_inode, who will take the
* proper cluster locks to sort things out. */
if (new_nlink == 0) {
spin_lock(&oi->ip_lock);
oi->ip_flags |= OCFS2_INODE_MAYBE_ORPHANED;
spin_unlock(&OCFS2_I(inode)->ip_lock);
}
}
}
static void ocfs2_process_vote(struct ocfs2_super *osb,
struct ocfs2_vote_msg *msg)
{
int net_status, vote_response;
int orphaned_slot = 0;
int rename = 0;
unsigned int node_num, generation, new_nlink, namelen;
u64 blkno, parent_blkno;
unsigned int node_num, generation;
u64 blkno;
enum ocfs2_vote_request request;
struct inode *inode = NULL;
struct ocfs2_msg_hdr *hdr = &msg->v_hdr;
......@@ -437,18 +342,6 @@ static void ocfs2_process_vote(struct ocfs2_super *osb,
vote_response = ocfs2_process_delete_request(inode,
&orphaned_slot);
break;
case OCFS2_VOTE_REQ_RENAME:
rename = 1;
/* fall through */
case OCFS2_VOTE_REQ_UNLINK:
parent_blkno = be64_to_cpu(msg->v_unlink_parent);
namelen = be32_to_cpu(msg->v_unlink_namelen);
/* new_nlink will be ignored in case of a rename vote */
new_nlink = be32_to_cpu(msg->md1.v_nlink);
ocfs2_process_dentry_request(inode, rename, new_nlink,
parent_blkno, namelen,
msg->v_unlink_dirent);
break;
default:
mlog(ML_ERROR, "node %u, invalid request: %u\n",
node_num, request);
......@@ -889,75 +782,6 @@ int ocfs2_request_delete_vote(struct inode *inode)
return status;
}
static void ocfs2_setup_unlink_vote(struct ocfs2_vote_msg *request,
struct dentry *dentry)
{
struct inode *parent = dentry->d_parent->d_inode;
/* We need some values which will uniquely identify a dentry
* on the other nodes so that they can find it and run
* d_delete against it. Parent directory block and full name
* should suffice. */
mlog(0, "unlink/rename request: parent: %llu name: %.*s\n",
(unsigned long long)OCFS2_I(parent)->ip_blkno, dentry->d_name.len,
dentry->d_name.name);
request->v_unlink_parent = cpu_to_be64(OCFS2_I(parent)->ip_blkno);
request->v_unlink_namelen = cpu_to_be32(dentry->d_name.len);
memcpy(request->v_unlink_dirent, dentry->d_name.name,
dentry->d_name.len);
}
int ocfs2_request_unlink_vote(struct inode *inode,
struct dentry *dentry,
unsigned int nlink)
{
int status;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct ocfs2_vote_msg *request;
if (dentry->d_name.len > OCFS2_VOTE_FILENAME_LEN)
return -ENAMETOOLONG;
status = -ENOMEM;
request = ocfs2_new_vote_request(osb, OCFS2_I(inode)->ip_blkno,
inode->i_generation,
OCFS2_VOTE_REQ_UNLINK, nlink);
if (request) {
ocfs2_setup_unlink_vote(request, dentry);
status = ocfs2_request_vote(inode, request, NULL);
kfree(request);
}
return status;
}
int ocfs2_request_rename_vote(struct inode *inode,
struct dentry *dentry)
{
int status;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct ocfs2_vote_msg *request;
if (dentry->d_name.len > OCFS2_VOTE_FILENAME_LEN)
return -ENAMETOOLONG;
status = -ENOMEM;
request = ocfs2_new_vote_request(osb, OCFS2_I(inode)->ip_blkno,
inode->i_generation,
OCFS2_VOTE_REQ_RENAME, 0);
if (request) {
ocfs2_setup_unlink_vote(request, dentry);
status = ocfs2_request_vote(inode, request, NULL);
kfree(request);
}
return status;
}
int ocfs2_request_mount_vote(struct ocfs2_super *osb)
{
int status;
......
fs/ocfs2/vote.h
View file @ b7a818e4
......@@ -39,11 +39,6 @@ static inline void ocfs2_kick_vote_thread(struct ocfs2_super *osb)
}
int ocfs2_request_delete_vote(struct inode *inode);
int ocfs2_request_unlink_vote(struct inode *inode,
struct dentry *dentry,
unsigned int nlink);
int ocfs2_request_rename_vote(struct inode *inode,
struct dentry *dentry);
int ocfs2_request_mount_vote(struct ocfs2_super *osb);
int ocfs2_request_umount_vote(struct ocfs2_super *osb);
int ocfs2_register_net_handlers(struct ocfs2_super *osb);
......
include/linux/fs.h
View file @ b7a818e4
......@@ -92,9 +92,10 @@ extern int dir_notify_enable;
#define FS_REQUIRES_DEV 1
#define FS_BINARY_MOUNTDATA 2
#define FS_REVAL_DOT 16384 /* Check the paths ".", ".." for staleness */
#define FS_ODD_RENAME 32768 /* Temporary stuff; will go away as soon
* as nfs_rename() will be cleaned up
*/
#define FS_RENAME_DOES_D_MOVE 32768 /* FS will handle d_move()
* during rename() internally.
*/
/*
* These are the fs-independent mount-flags: up to 32 flags are supported
*/
......
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