-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*/
#define DEBUG_SUBSYSTEM S_LLITE
-#include <lustre_lite.h>
#include "llite_internal.h"
-#ifdef HAVE_LINUX_EXPORTFS_H
#include <linux/exportfs.h>
-#endif
-static int ll_nfs_test_inode(struct inode *inode, void *opaque)
+u32 get_uuid2int(const char *name, int len)
{
- return lu_fid_eq(&ll_i2info(inode)->lli_fid,
- (struct lu_fid *)opaque);
-}
+ u32 key0 = 0x12a3fe2d, key1 = 0x37abe8f9;
-static struct inode *search_inode_for_lustre(struct super_block *sb,
- struct lu_fid *fid,
- int mode)
-{
- struct ll_sb_info *sbi = ll_s2sbi(sb);
- struct ptlrpc_request *req = NULL;
- struct inode *inode = NULL;
- unsigned long valid = 0;
- int eadatalen = 0;
- ino_t ino = ll_fid_build_ino(sbi, fid);
- int rc;
- ENTRY;
-
- CDEBUG(D_INFO, "searching inode for:(%lu,"DFID")\n", ino, PFID(fid));
-
- inode = ILOOKUP(sb, ino, ll_nfs_test_inode, fid);
- if (inode)
- RETURN(inode);
-
- if (S_ISREG(mode)) {
- rc = ll_get_max_mdsize(sbi, &eadatalen);
- if (rc)
- RETURN(ERR_PTR(rc));
- valid |= OBD_MD_FLEASIZE;
- }
-
- rc = md_getattr(sbi->ll_md_exp, fid, NULL, valid, eadatalen, &req);
- if (rc) {
- CERROR("can't get object attrs, fid "DFID", rc %d\n",
- PFID(fid), rc);
- RETURN(ERR_PTR(rc));
- }
-
- rc = ll_prep_inode(&inode, req, sb);
- ptlrpc_req_finished(req);
- if (rc)
- RETURN(ERR_PTR(rc));
-
- RETURN(inode);
+ while (len--) {
+ u32 key = key1 + (key0 ^ (*name++ * 7152373));
+
+ if (key & 0x80000000)
+ key -= 0x7fffffff;
+
+ key1 = key0;
+ key0 = key;
+ }
+ return (key0 << 1);
}
-static struct dentry *ll_iget_for_nfs(struct super_block *sb,
- struct lu_fid *fid,
- umode_t mode)
+struct inode *search_inode_for_lustre(struct super_block *sb,
+ const struct lu_fid *fid)
{
- struct inode *inode;
- struct dentry *result;
- ENTRY;
-
- CDEBUG(D_INFO, "Get dentry for fid: "DFID"\n", PFID(fid));
- if (!fid_is_sane(fid))
- RETURN(ERR_PTR(-ESTALE));
-
- inode = search_inode_for_lustre(sb, fid, mode);
- if (IS_ERR(inode))
- RETURN(ERR_PTR(PTR_ERR(inode)));
-
- if (is_bad_inode(inode)) {
- /* we didn't find the right inode.. */
- CERROR("can't get inode by fid "DFID"\n",
- PFID(fid));
- iput(inode);
- RETURN(ERR_PTR(-ESTALE));
- }
-
- result = d_alloc_anon(inode);
- if (!result) {
- iput(inode);
- RETURN(ERR_PTR(-ENOMEM));
- }
-
- ll_set_dd(result);
-
- lock_dentry(result);
- if (unlikely(result->d_op == &ll_init_d_ops)) {
- result->d_op = &ll_d_ops;
- unlock_dentry(result);
- smp_wmb();
- ll_d_wakeup(result);
- } else {
- result->d_op = &ll_d_ops;
- unlock_dentry(result);
- }
-
- RETURN(result);
+ struct ll_sb_info *sbi = ll_s2sbi(sb);
+ struct ptlrpc_request *req = NULL;
+ struct inode *inode = NULL;
+ int eadatalen = 0;
+ unsigned long hash = cl_fid_build_ino(fid, ll_need_32bit_api(sbi));
+ struct md_op_data *op_data;
+ int rc;
+
+ ENTRY;
+
+ CDEBUG(D_INFO, "searching inode for:(%lu,"DFID")\n", hash, PFID(fid));
+
+ inode = ilookup5(sb, hash, ll_test_inode_by_fid, (void *)fid);
+ if (inode)
+ RETURN(inode);
+
+ rc = ll_get_default_mdsize(sbi, &eadatalen);
+ if (rc)
+ RETURN(ERR_PTR(rc));
+
+ /*
+ * Because inode is NULL, ll_prep_md_op_data can not
+ * be used here. So we allocate op_data ourselves
+ */
+ OBD_ALLOC_PTR(op_data);
+ if (!op_data)
+ return ERR_PTR(-ENOMEM);
+
+ op_data->op_fid1 = *fid;
+ op_data->op_mode = eadatalen;
+ op_data->op_valid = OBD_MD_FLEASIZE;
+
+ /* mds_fid2dentry ignores f_type */
+ rc = md_getattr(sbi->ll_md_exp, op_data, &req);
+ OBD_FREE_PTR(op_data);
+ if (rc) {
+ /*
+ * Suppress erroneous/confusing messages when NFS
+ * is out of sync and requests old data.
+ */
+ CDEBUG(D_INFO, "can't get object attrs, fid "DFID", rc %d\n",
+ PFID(fid), rc);
+ RETURN(ERR_PTR(rc));
+ }
+ rc = ll_prep_inode(&inode, req, sb, NULL);
+ ptlrpc_req_finished(req);
+ if (rc)
+ RETURN(ERR_PTR(rc));
+
+ RETURN(inode);
}
-/*
- * This length is counted as amount of __u32,
- * It is composed of a fid and a mode
- */
-#define ONE_FH_LEN (sizeof(struct lu_fid)/4 + 1)
-
-static struct dentry *ll_decode_fh(struct super_block *sb, __u32 *fh, int fh_len,
- int fh_type,
- int (*acceptable)(void *, struct dentry *),
- void *context)
+static struct dentry *
+ll_iget_for_nfs(struct super_block *sb, struct lu_fid *fid, struct lu_fid *parent)
{
- struct lu_fid *parent = NULL;
- struct lu_fid *child;
- struct dentry *entry;
- ENTRY;
-
- CDEBUG(D_INFO, "decoding for "DFID" fh_len=%d fh_type=%d\n",
- PFID((struct lu_fid*)fh), fh_len, fh_type);
-
- if (fh_type != 1 && fh_type != 2)
- RETURN(ERR_PTR(-ESTALE));
- if (fh_len < ONE_FH_LEN * fh_type)
- RETURN(ERR_PTR(-ESTALE));
-
- child = (struct lu_fid*)fh;
- if (fh_type == 2)
- parent = (struct lu_fid*)(fh + ONE_FH_LEN);
-
- entry = sb->s_export_op->find_exported_dentry(sb, child, parent,
- acceptable, context);
- RETURN(entry);
+ struct inode *inode;
+ struct dentry *result;
+
+ ENTRY;
+
+ if (!fid_is_sane(fid))
+ RETURN(ERR_PTR(-ESTALE));
+
+ CDEBUG(D_INFO, "Get dentry for fid: "DFID"\n", PFID(fid));
+
+ inode = search_inode_for_lustre(sb, fid);
+ if (IS_ERR(inode))
+ RETURN(ERR_PTR(PTR_ERR(inode)));
+
+ if (is_bad_inode(inode)) {
+ /* we didn't find the right inode.. */
+ iput(inode);
+ RETURN(ERR_PTR(-ESTALE));
+ }
+
+ /* N.B. d_obtain_alias() drops inode ref on error */
+ result = d_obtain_alias(inode);
+ if (!IS_ERR(result)) {
+ int rc;
+
+ rc = ll_d_init(result);
+ if (rc < 0) {
+ dput(result);
+ result = ERR_PTR(rc);
+ } else {
+ struct ll_dentry_data *ldd = ll_d2d(result);
+
+ /*
+ * Need to signal to the ll_file_open that
+ * we came from NFS and so opencache needs to be
+ * enabled for this one
+ */
+ spin_lock(&result->d_lock);
+ ldd->lld_nfs_dentry = 1;
+ spin_unlock(&result->d_lock);
+ }
+ }
+
+ RETURN(result);
}
-/* The return value is file handle type:
+#ifndef FILEID_INVALID
+#define FILEID_INVALID 0xff
+#endif
+#ifndef FILEID_LUSTRE
+#define FILEID_LUSTRE 0x97
+#endif
+
+/**
+ * \a connectable - is nfsd will connect himself or this should be done
+ * at lustre
+ *
+ * The return value is file handle type:
* 1 -- contains child file handle;
* 2 -- contains child file handle and parent file handle;
* 255 -- error.
*/
-static int ll_encode_fh(struct dentry *de, __u32 *fh, int *plen, int connectable)
+static int ll_encode_fh(struct inode *inode, u32 *fh, int *plen,
+ struct inode *parent)
{
- struct inode *inode = de->d_inode;
- struct lu_fid *fid = ll_inode2fid(inode);
- ENTRY;
-
- CDEBUG(D_INFO, "encoding for (%lu,"DFID") maxlen=%d minlen=%d\n",
- inode->i_ino, PFID(fid), *plen, (int)ONE_FH_LEN);
-
- if (*plen < ONE_FH_LEN)
- RETURN(255);
-
- memcpy((char*)fh, fid, sizeof(*fid));
- *(fh + ONE_FH_LEN - 1) = (__u32)(S_IFMT & inode->i_mode);
-
- if (de->d_parent && *plen >= ONE_FH_LEN * 2) {
- struct inode *parent = de->d_parent->d_inode;
- fh += ONE_FH_LEN;
- memcpy((char*)fh, &ll_i2info(parent)->lli_fid, sizeof(*fid));
- *(fh + ONE_FH_LEN - 1) = (__u32)(S_IFMT & parent->i_mode);
- *plen = ONE_FH_LEN * 2;
- RETURN(2);
- } else {
- *plen = ONE_FH_LEN;
- RETURN(1);
- }
+ int fileid_len = sizeof(struct lustre_file_handle) / 4;
+ struct lustre_file_handle *lfh = (void *)fh;
+
+ ENTRY;
+
+ CDEBUG(D_INFO, "%s: encoding for ("DFID") maxlen=%d minlen=%d\n",
+ ll_i2sbi(inode)->ll_fsname,
+ PFID(ll_inode2fid(inode)), *plen, fileid_len);
+
+ if (*plen < fileid_len) {
+ *plen = fileid_len;
+ RETURN(FILEID_INVALID);
+ }
+
+ lfh->lfh_child = *ll_inode2fid(inode);
+ if (parent)
+ lfh->lfh_parent = *ll_inode2fid(parent);
+ else
+ fid_zero(&lfh->lfh_parent);
+ *plen = fileid_len;
+
+ RETURN(FILEID_LUSTRE);
}
-static struct dentry *ll_get_dentry(struct super_block *sb, void *data)
+static int
+#ifndef HAVE_FILLDIR_USE_CTX
+ll_nfs_get_name_filldir(void *cookie, const char *name, int namelen,
+ loff_t hash, u64 ino, unsigned type)
{
- struct lu_fid *fid;
- struct dentry *entry;
- __u32 mode;
- ENTRY;
-
- fid = (struct lu_fid *)data;
- mode = *((__u32*)data + ONE_FH_LEN - 1);
-
- entry = ll_iget_for_nfs(sb, fid, mode);
- RETURN(entry);
+ struct ll_getname_data *lgd = cookie;
+#else
+ll_nfs_get_name_filldir(struct dir_context *ctx, const char *name, int namelen,
+ loff_t hash, u64 ino, unsigned type)
+{
+ struct ll_getname_data *lgd =
+ container_of(ctx, struct ll_getname_data, ctx);
+#endif /* HAVE_FILLDIR_USE_CTX */
+ /*
+ * It is hack to access lde_fid for comparison with lgd_fid.
+ * So the input 'name' must be part of the 'lu_dirent', and
+ * so must appear to be a non-const pointer to an empty array.
+ */
+ char (*n)[0] = (void *)name;
+ struct lu_dirent *lde = container_of0(n, struct lu_dirent, lde_name);
+ struct lu_fid fid;
+
+ fid_le_to_cpu(&fid, &lde->lde_fid);
+ if (lu_fid_eq(&fid, &lgd->lgd_fid)) {
+ memcpy(lgd->lgd_name, name, namelen);
+ lgd->lgd_name[namelen] = 0;
+ lgd->lgd_found = 1;
+ }
+ return lgd->lgd_found;
+}
+
+static int ll_get_name(struct dentry *dentry, char *name,
+ struct dentry *child)
+{
+ struct inode *dir = dentry->d_inode;
+ struct ll_getname_data lgd = {
+ .lgd_name = name,
+ .lgd_fid = ll_i2info(child->d_inode)->lli_fid,
+#ifdef HAVE_DIR_CONTEXT
+ .ctx.actor = ll_nfs_get_name_filldir,
+#endif
+ .lgd_found = 0,
+ };
+ struct md_op_data *op_data;
+ u64 pos = 0;
+ int rc;
+
+ ENTRY;
+
+ if (!dir || !S_ISDIR(dir->i_mode))
+ GOTO(out, rc = -ENOTDIR);
+
+ if (!dir->i_fop)
+ GOTO(out, rc = -EINVAL);
+
+ op_data = ll_prep_md_op_data(NULL, dir, dir, NULL, 0, 0,
+ LUSTRE_OPC_ANY, dir);
+ if (IS_ERR(op_data))
+ GOTO(out, rc = PTR_ERR(op_data));
+
+ inode_lock(dir);
+#ifdef HAVE_DIR_CONTEXT
+ rc = ll_dir_read(dir, &pos, op_data, &lgd.ctx);
+#else
+ rc = ll_dir_read(dir, &pos, op_data, &lgd, ll_nfs_get_name_filldir);
+#endif
+ inode_unlock(dir);
+ ll_finish_md_op_data(op_data);
+ if (!rc && !lgd.lgd_found)
+ rc = -ENOENT;
+ EXIT;
+out:
+ return rc;
+}
+
+static struct dentry *ll_fh_to_dentry(struct super_block *sb, struct fid *fid,
+ int fh_len, int fh_type)
+{
+ struct lustre_file_handle *lfh = (struct lustre_file_handle *)fid;
+
+ if (fh_type != FILEID_LUSTRE)
+ RETURN(ERR_PTR(-EPROTO));
+
+ RETURN(ll_iget_for_nfs(sb, &lfh->lfh_child, &lfh->lfh_parent));
+}
+
+static struct dentry *ll_fh_to_parent(struct super_block *sb, struct fid *fid,
+ int fh_len, int fh_type)
+{
+ struct lustre_file_handle *lfh = (struct lustre_file_handle *)fid;
+
+ if (fh_type != FILEID_LUSTRE)
+ RETURN(ERR_PTR(-EPROTO));
+
+ RETURN(ll_iget_for_nfs(sb, &lfh->lfh_parent, NULL));
+}
+
+int ll_dir_get_parent_fid(struct inode *dir, struct lu_fid *parent_fid)
+{
+ struct ptlrpc_request *req = NULL;
+ struct ll_sb_info *sbi;
+ struct mdt_body *body;
+ static const char dotdot[] = "..";
+ struct md_op_data *op_data;
+ int rc;
+ int lmmsize;
+
+ ENTRY;
+
+ LASSERT(dir && S_ISDIR(dir->i_mode));
+
+ sbi = ll_s2sbi(dir->i_sb);
+
+ CDEBUG(D_INFO, "%s: getting parent for ("DFID")\n",
+ sbi->ll_fsname, PFID(ll_inode2fid(dir)));
+
+ rc = ll_get_default_mdsize(sbi, &lmmsize);
+ if (rc != 0)
+ RETURN(rc);
+
+ op_data = ll_prep_md_op_data(NULL, dir, NULL, dotdot,
+ strlen(dotdot), lmmsize,
+ LUSTRE_OPC_ANY, NULL);
+ if (IS_ERR(op_data))
+ RETURN(PTR_ERR(op_data));
+
+ rc = md_getattr_name(sbi->ll_md_exp, op_data, &req);
+ ll_finish_md_op_data(op_data);
+ if (rc != 0) {
+ CERROR("%s: failure inode "DFID" get parent: rc = %d\n",
+ sbi->ll_fsname, PFID(ll_inode2fid(dir)), rc);
+ RETURN(rc);
+ }
+ body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
+
+ /*
+ * LU-3952: MDT may lost the FID of its parent, we should not crash
+ * the NFS server, ll_iget_for_nfs() will handle the error.
+ */
+ if (body->mbo_valid & OBD_MD_FLID) {
+ CDEBUG(D_INFO, "parent for "DFID" is "DFID"\n",
+ PFID(ll_inode2fid(dir)), PFID(&body->mbo_fid1));
+ *parent_fid = body->mbo_fid1;
+ }
+
+ ptlrpc_req_finished(req);
+ RETURN(0);
}
static struct dentry *ll_get_parent(struct dentry *dchild)
{
- struct ptlrpc_request *req = NULL;
- struct inode *dir = dchild->d_inode;
- struct ll_sb_info *sbi;
- struct dentry *result = NULL;
- struct mdt_body *body;
- static char dotdot[] = "..";
- int rc;
- ENTRY;
-
- LASSERT(dir && S_ISDIR(dir->i_mode));
-
- sbi = ll_s2sbi(dir->i_sb);
-
- CDEBUG(D_INFO, "getting parent for (%lu,"DFID")\n",
- dir->i_ino, PFID(ll_inode2fid(dir)));
-
- rc = md_getattr_name(sbi->ll_md_exp, ll_inode2fid(dir), NULL,
- dotdot, strlen(dotdot) + 1, 0, 0,
- ll_i2suppgid(dir), &req);
- if (rc) {
- CERROR("failure %d inode %lu get parent\n", rc, dir->i_ino);
- RETURN(ERR_PTR(rc));
- }
- body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
- LASSERT(body->valid & OBD_MD_FLID);
-
- CDEBUG(D_INFO, "parent for "DFID" is "DFID"\n",
- PFID(ll_inode2fid(dir)), PFID(&body->fid1));
-
- result = ll_iget_for_nfs(dir->i_sb, &body->fid1, S_IFDIR);
-
- ptlrpc_req_finished(req);
- RETURN(result);
-}
+ struct lu_fid parent_fid = { 0 };
+ int rc;
+ struct dentry *dentry;
+
+ ENTRY;
+
+ rc = ll_dir_get_parent_fid(dchild->d_inode, &parent_fid);
+ if (rc != 0)
+ RETURN(ERR_PTR(rc));
+
+ dentry = ll_iget_for_nfs(dchild->d_inode->i_sb, &parent_fid, NULL);
+
+ RETURN(dentry);
+}
struct export_operations lustre_export_operations = {
- .get_parent = ll_get_parent,
- .get_dentry = ll_get_dentry,
- .encode_fh = ll_encode_fh,
- .decode_fh = ll_decode_fh,
+ .get_parent = ll_get_parent,
+ .encode_fh = ll_encode_fh,
+ .get_name = ll_get_name,
+ .fh_to_dentry = ll_fh_to_dentry,
+ .fh_to_parent = ll_fh_to_parent,
};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff