#include <linux/lustre_lite.h>
#include <linux/lustre_idl.h>
#include <linux/lustre_dlm.h>
+#include <linux/lustre_version.h>
#include "llite_internal.h"
EXIT;
}
+/* should NOT be called with the dcache lock, see fs/dcache.c */
+static int ll_ddelete(struct dentry *de)
+{
+ ENTRY;
+ LASSERT(de);
+ CDEBUG(D_DENTRY, "%s dentry %*s (%p, parent %p, inode %p) %s%s\n",
+ (de->d_flags & DCACHE_LUSTRE_INVALID ? "keeping" : "deleting"),
+ de->d_name.len, de->d_name.name, de, de->d_parent, de->d_inode,
+ d_unhashed(de) ? "" : "hashed,",
+ list_empty(&de->d_subdirs) ? "" : "subdirs");
+ RETURN(0);
+}
+
void ll_set_dd(struct dentry *de)
{
ENTRY;
LASSERT(de != NULL);
+ CDEBUG(D_DENTRY, "ldd on dentry %*s (%p) parent %p inode %p refc %d\n",
+ de->d_name.len, de->d_name.name, de, de->d_parent, de->d_inode,
+ atomic_read(&de->d_count));
lock_kernel();
if (de->d_fsdata == NULL) {
OBD_ALLOC(de->d_fsdata, sizeof(struct ll_dentry_data));
EXIT;
}
-void ll_intent_release(struct lookup_intent *it)
+void ll_intent_drop_lock(struct lookup_intent *it)
{
struct lustre_handle *handle;
- ENTRY;
if (it->it_op && it->d.lustre.it_lock_mode) {
handle = (struct lustre_handle *)&it->d.lustre.it_lock_handle;
" from it %p\n", handle->cookie, it);
ldlm_lock_decref(handle, it->d.lustre.it_lock_mode);
- /* intent_release may be called multiple times, from
- this thread and we don't want to double-decref this
- lock (see bug 494) */
+ /* bug 494: intent_release may be called multiple times, from
+ * this thread and we don't want to double-decref this lock */
it->d.lustre.it_lock_mode = 0;
}
+}
+
+void ll_intent_release(struct lookup_intent *it)
+{
+ ENTRY;
+
+ ll_intent_drop_lock(it);
it->it_magic = 0;
it->it_op_release = 0;
it->d.lustre.it_disposition = 0;
void ll_unhash_aliases(struct inode *inode)
{
- struct list_head *tmp, *head;
+ struct list_head *tmp, *head;
struct ll_sb_info *sbi;
ENTRY;
- sbi = ll_i2sbi(inode);
-
- CDEBUG(D_INODE, "marking dentries for ino %lu/%u(%p) invalid\n",
- inode->i_ino, inode->i_generation, inode);
-
if (inode == NULL) {
CERROR("unexpected NULL inode, tell phil\n");
return;
}
+
+ CDEBUG(D_INODE, "marking dentries for ino %lu/%u(%p) invalid\n",
+ inode->i_ino, inode->i_generation, inode);
+
+ sbi = ll_i2sbi(inode);
head = &inode->i_dentry;
restart:
- spin_lock(&dcache_lock);
- tmp = head;
- while ((tmp = tmp->next) != head) {
- struct dentry *dentry = list_entry(tmp, struct dentry, d_alias);
- if (!atomic_read(&dentry->d_count)) {
- dget_locked(dentry);
- __d_drop(dentry);
- spin_unlock(&dcache_lock);
- dput(dentry);
- goto restart;
- } else {
+ spin_lock(&dcache_lock);
+ tmp = head;
+ while ((tmp = tmp->next) != head) {
+ struct dentry *dentry = list_entry(tmp, struct dentry, d_alias);
+ if (atomic_read(&dentry->d_count) == 0) {
+ CDEBUG(D_DENTRY, "deleting dentry %*s (%p) parent %p "
+ "inode %p\n", dentry->d_name.len,
+ dentry->d_name.name, dentry, dentry->d_parent,
+ dentry->d_inode);
+ dget_locked(dentry);
+ __d_drop(dentry);
+ spin_unlock(&dcache_lock);
+ dput(dentry);
+ goto restart;
+ } else if (!(dentry->d_flags & DCACHE_LUSTRE_INVALID)) {
+ CDEBUG(D_DENTRY, "unhashing dentry %*s (%p) parent %p "
+ "inode %p refc %d\n", dentry->d_name.len,
+ dentry->d_name.name, dentry, dentry->d_parent,
+ dentry->d_inode, atomic_read(&dentry->d_count));
hlist_del_init(&dentry->d_hash);
dentry->d_flags |= DCACHE_LUSTRE_INVALID;
- hlist_add_head(&dentry->d_hash,
+ hlist_add_head(&dentry->d_hash,
&sbi->ll_orphan_dentry_list);
}
- }
- spin_unlock(&dcache_lock);
+ }
+ spin_unlock(&dcache_lock);
EXIT;
}
extern struct dentry *ll_find_alias(struct inode *, struct dentry *);
-static int revalidate_it_finish(struct ptlrpc_request *request, int offset,
- struct lookup_intent *it,
+static int revalidate_it_finish(struct ptlrpc_request *request,
+ int offset, struct lookup_intent *it,
struct dentry *de)
{
struct ll_sb_info *sbi;
RETURN(-ENOENT);
sbi = ll_i2sbi(de->d_inode);
- rc = ll_prep_inode(sbi->ll_osc_exp, &de->d_inode, request, offset,NULL);
+ rc = ll_prep_inode(sbi->ll_osc_exp, sbi->ll_mdc_exp,
+ &de->d_inode, request, offset, NULL);
RETURN(rc);
}
struct inode *inode = dentry->d_inode;
CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
inode, inode->i_ino, inode->i_generation);
- mdc_set_lock_data(&it->d.lustre.it_lock_handle, inode);
+ mdc_set_lock_data(NULL, &it->d.lustre.it_lock_handle, inode);
}
- /* drop IT_LOOKUP locks */
- if (it->it_op == IT_LOOKUP)
+ /* drop lookup or getattr locks immediately */
+ if (it->it_op == IT_LOOKUP || it->it_op == IT_GETATTR) {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ /* on 2.6 there are situation when several lookups and
+ * revalidations may be requested during single operation.
+ * therefore, we don't release intent here -bzzz */
+ ll_intent_drop_lock(it);
+#else
ll_intent_release(it);
+#endif
+ }
}
void ll_frob_intent(struct lookup_intent **itp, struct lookup_intent *deft)
{
struct lookup_intent *it = *itp;
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
- if (it && it->it_magic != INTENT_MAGIC) {
+ if (it && it->it_magic != INTENT_MAGIC) {
CERROR("WARNING: uninitialized intent\n");
LBUG();
}
if (it && (it->it_op == IT_GETATTR || it->it_op == 0))
it->it_op = IT_LOOKUP;
-
#endif
+
if (!it || it->it_op == IT_GETXATTR)
it = *itp = deft;
it->it_op_release = ll_intent_release;
}
-int ll_revalidate_it(struct dentry *de, int flags, struct lookup_intent *it)
+int ll_revalidate_it(struct dentry *de, int flags, struct nameidata *nd,
+ struct lookup_intent *it)
{
int rc;
struct ll_fid pfid, cfid;
if (de->d_inode == NULL)
RETURN(0);
+ CDEBUG(D_INODE, "revalidate 0x%p: %*s -> %lu/%lu\n",
+ de, de->d_name.len, de->d_name.name,
+ (unsigned long) de->d_inode->i_ino,
+ (unsigned long) de->d_inode->i_generation);
+
exp = ll_i2mdcexp(de->d_inode);
ll_inode2fid(&pfid, de->d_parent->d_inode);
ll_inode2fid(&cfid, de->d_inode);
icbd.icbd_parent = de->d_parent->d_inode;
icbd.icbd_childp = &de;
- /*
- * never execute intents for mount points
- * - attrs will be fixed up in ll_revalidate_inode
- */
+ /* Never execute intents for mount points.
+ * Attributes will be fixed up in ll_inode_revalidate_it */
if (d_mountpoint(de))
RETURN(1);
+ if (nd != NULL)
+ nd->mnt->mnt_last_used = jiffies;
+
ll_frob_intent(&it, &lookup_it);
LASSERT(it);
ll_i2uctxt(&ctxt, de->d_parent->d_inode, de->d_inode);
- rc = mdc_intent_lock(exp, &ctxt, &pfid, de->d_name.name, de->d_name.len,
- NULL, 0,
- &cfid, it, flags, &req, ll_mdc_blocking_ast);
+ if (it->it_op == IT_GETATTR) { /* We need to check for LOOKUP lock
+ as well */
+ rc = md_intent_lock(exp, &ctxt, &pfid, de->d_name.name,
+ de->d_name.len, NULL, 0, &cfid, &lookup_it,
+ flags, &req, ll_mdc_blocking_ast);
+ /* If there was no lookup lock, no point in even checking for
+ UPDATE lock */
+ if (!rc) {
+ it = &lookup_it;
+ GOTO(out, rc);
+ }
+ if (it_disposition(&lookup_it, DISP_LOOKUP_NEG)) {
+ ll_intent_release(&lookup_it);
+ it = &lookup_it;
+ GOTO(out, rc = 0);
+ }
+
+ if (req)
+ ptlrpc_req_finished(req);
+ req = NULL;
+ ll_lookup_finish_locks(&lookup_it, de);
+ }
+
+ rc = md_intent_lock(exp, &ctxt, &pfid, de->d_name.name, de->d_name.len,
+ NULL, 0, &cfid, it, flags, &req,
+ ll_mdc_blocking_ast);
/* If req is NULL, then mdc_intent_lock only tried to do a lock match;
* if all was well, it will return 1 if it found locks, 0 otherwise. */
if (req == NULL && rc >= 0)
__d_rehash(de, 0);
spin_unlock(&dcache_lock);
+ GOTO(out, rc);
out:
if (req != NULL && rc == 1)
ptlrpc_req_finished(req);
- if (rc == 0) {
+ if (rc == 0) {
ll_unhash_aliases(de->d_inode);
- de->d_flags |= DCACHE_LUSTRE_INVALID;
- } else {
- ll_lookup_finish_locks(it, de);
- de->d_flags &= ~DCACHE_LUSTRE_INVALID;
+ return rc;
}
- RETURN(rc);
+
+ CDEBUG(D_DENTRY, "revalidated dentry %*s (%p) parent %p "
+ "inode %p refc %d\n", de->d_name.len,
+ de->d_name.name, de, de->d_parent, de->d_inode,
+ atomic_read(&de->d_count));
+ ll_lookup_finish_locks(it, de);
+ de->d_flags &= ~DCACHE_LUSTRE_INVALID;
+ if (!((de->d_inode->i_mode & S_ISUID) &&S_ISDIR(de->d_inode->i_mode)) ||
+ !(flags & LOOKUP_CONTINUE || (it->it_op & (IT_CHDIR | IT_OPEN))))
+ return rc;
+
+ if (nd)
+ (void)ll_dir_process_mount_object(de, nd->mnt);
+ return rc;
}
/*static*/ void ll_pin(struct dentry *de, struct vfsmount *mnt, int flag)
int rc;
ENTRY;
- if (nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
- rc = ll_revalidate_it(dentry, nd->flags, &nd->intent);
- else
- rc = ll_revalidate_it(dentry, 0, NULL);
+ if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
+ rc = ll_revalidate_it(dentry, nd->flags, nd, &nd->intent);
+ else
+ rc = ll_revalidate_it(dentry, 0, nd, NULL);
RETURN(rc);
}
#endif
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+static void ll_dentry_iput(struct dentry *dentry, struct inode *inode)
+{
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct ll_fid parent, child;
+
+ LASSERT(dentry->d_parent && dentry->d_parent->d_inode);
+ ll_inode2fid(&parent, dentry->d_parent->d_inode);
+ ll_inode2fid(&child, inode);
+ md_change_cbdata_name(sbi->ll_mdc_exp, &parent,
+ (char *)dentry->d_name.name,
+ dentry->d_name.len, &child,
+ null_if_equal, inode);
+ iput(inode);
+}
+#else
+#error "implement ->d_iput() for 2.6"
+#endif
+
struct dentry_operations ll_d_ops = {
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
.d_revalidate = ll_revalidate_nd,
.d_revalidate_it = ll_revalidate_it,
#endif
.d_release = ll_release,
+ .d_iput = ll_dentry_iput,
+ .d_delete = ll_ddelete,
#if 0
.d_pin = ll_pin,
.d_unpin = ll_unpin,
git://git.whamcloud.com / fs / lustre-release.git / blobdiff