/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * Copyright (C) 1992, 1993, 1994, 1995
- * Remy Card (card@masi.ibp.fr)
- * Laboratoire MASI - Institut Blaise Pascal
- * Universite Pierre et Marie Curie (Paris VI)
+ * GPL HEADER START
*
- * from
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * linux/fs/minix/dir.c
- * linux/fs/ext2/dir.c
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * Copyright (C) 1991, 1992 Linus Torvalds
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * ext2 directory handling functions
+ * 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
*
- * Big-endian to little-endian byte-swapping/bitmaps by
- * David S. Miller (davem@caip.rutgers.edu), 1995
+ * 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.
*
- * All code that works with directory layout had been switched to pagecache
- * and moved here. AV
+ * GPL HEADER END
+ */
+/*
+ * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
*
- * Adapted for Lustre Light
- * Copyright (C) 2002, Cluster File Systems, Inc.
+ * lustre/llite/dir.c
*
+ * Directory code for lustre client.
*/
#include <linux/fs.h>
-#include <linux/ext2_fs.h>
#include <linux/pagemap.h>
#include <linux/mm.h>
#include <linux/version.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
-#include <linux/locks.h> // for wait_on_buffer
-#else
#include <linux/buffer_head.h> // for wait_on_buffer
-#endif
#define DEBUG_SUBSYSTEM S_LLITE
-#include <linux/obd_support.h>
-#include <linux/obd_class.h>
-#include <linux/lustre_lib.h>
-#include <linux/lustre_idl.h>
-#include <linux/lustre_mds.h>
-#include <linux/lustre_lite.h>
-#include <linux/lustre_dlm.h>
-
-typedef struct ext2_dir_entry_2 ext2_dirent;
-
-#define PageChecked(page) test_bit(PG_checked, &(page)->flags)
-#define SetPageChecked(page) set_bit(PG_checked, &(page)->flags)
-
+#include <obd_support.h>
+#include <obd_class.h>
+#include <lustre_lib.h>
+#include <lustre/lustre_idl.h>
+#include <lustre_lite.h>
+#include <lustre_dlm.h>
+#include <lustre_fid.h>
+#include "llite_internal.h"
+
+#ifndef HAVE_PAGE_CHECKED
+#ifdef HAVE_PG_FS_MISC
+#define PageChecked(page) test_bit(PG_fs_misc, &(page)->flags)
+#define SetPageChecked(page) set_bit(PG_fs_misc, &(page)->flags)
+#else
+#error PageChecked or PageFsMisc not defined in kernel
+#endif
+#endif
-static int ll_dir_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
-{
- return 0;
-}
+/*
+ * (new) readdir implementation overview.
+ *
+ * Original lustre readdir implementation cached exact copy of raw directory
+ * pages on the client. These pages were indexed in client page cache by
+ * logical offset in the directory file. This design, while very simple and
+ * intuitive had some inherent problems:
+ *
+ * . it implies that byte offset to the directory entry serves as a
+ * telldir(3)/seekdir(3) cookie, but that offset is not stable: in
+ * ext3/htree directory entries may move due to splits, and more
+ * importantly,
+ *
+ * . it is incompatible with the design of split directories for cmd3,
+ * that assumes that names are distributed across nodes based on their
+ * hash, and so readdir should be done in hash order.
+ *
+ * New readdir implementation does readdir in hash order, and uses hash of a
+ * file name as a telldir/seekdir cookie. This led to number of complications:
+ *
+ * . hash is not unique, so it cannot be used to index cached directory
+ * pages on the client (note, that it requires a whole pageful of hash
+ * collided entries to cause two pages to have identical hashes);
+ *
+ * . hash is not unique, so it cannot, strictly speaking, be used as an
+ * entry cookie. ext3/htree has the same problem and lustre implementation
+ * mimics their solution: seekdir(hash) positions directory at the first
+ * entry with the given hash.
+ *
+ * Client side.
+ *
+ * 0. caching
+ *
+ * Client caches directory pages using hash of the first entry as an index. As
+ * noted above hash is not unique, so this solution doesn't work as is:
+ * special processing is needed for "page hash chains" (i.e., sequences of
+ * pages filled with entries all having the same hash value).
+ *
+ * First, such chains have to be detected. To this end, server returns to the
+ * client the hash of the first entry on the page next to one returned. When
+ * client detects that this hash is the same as hash of the first entry on the
+ * returned page, page hash collision has to be handled. Pages in the
+ * hash chain, except first one, are termed "overflow pages".
+ *
+ * Solution to index uniqueness problem is to not cache overflow
+ * pages. Instead, when page hash collision is detected, all overflow pages
+ * from emerging chain are immediately requested from the server and placed in
+ * a special data structure (struct ll_dir_chain). This data structure is used
+ * by ll_readdir() to process entries from overflow pages. When readdir
+ * invocation finishes, overflow pages are discarded. If page hash collision
+ * chain weren't completely processed, next call to readdir will again detect
+ * page hash collision, again read overflow pages in, process next portion of
+ * entries and again discard the pages. This is not as wasteful as it looks,
+ * because, given reasonable hash, page hash collisions are extremely rare.
+ *
+ * 1. directory positioning
+ *
+ * When seekdir(hash) is called, original
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ * Server.
+ *
+ * identification of and access to overflow pages
+ *
+ * page format
+ *
+ *
+ *
+ *
+ *
+ */
/* returns the page unlocked, but with a reference */
static int ll_dir_readpage(struct file *file, struct page *page)
{
struct inode *inode = page->mapping->host;
- struct ll_sb_info *sbi = ll_i2sbi(inode);
- char *buf;
- __u64 offset;
- int rc = 0;
struct ptlrpc_request *request;
- struct lustre_handle lockh;
- struct mds_body *body;
- struct lookup_intent it = { .it_op = IT_READDIR };
-
+ struct mdt_body *body;
+ struct obd_capa *oc;
+ __u64 hash;
+ int rc;
ENTRY;
- if ((inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_SHIFT <= page->index){
- memset(kmap(page), 0, PAGE_CACHE_SIZE);
- kunmap(page);
- GOTO(readpage_out, rc);
- }
+ hash = (__u64)hash_x_index(page->index);
+ CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) off %lu\n",
+ inode->i_ino, inode->i_generation, inode, (unsigned long)hash);
- rc = mdc_enqueue(&sbi->ll_mdc_conn, LDLM_PLAIN, &it, LCK_PR, inode,
- NULL, &lockh, NULL, 0, inode, sizeof(*inode));
- request = (struct ptlrpc_request *)it.it_data;
- if (request)
- ptlrpc_req_finished(request);
- if (rc != ELDLM_OK) {
- CERROR("lock enqueue: err: %d\n", rc);
- unlock_page(page);
- RETURN(rc);
- }
- ldlm_lock_dump((void *)(unsigned long)lockh.addr);
-
- if (PageUptodate(page)) {
- CERROR("Explain this please?\n");
- GOTO(readpage_out, rc);
- }
-
- offset = page->index << PAGE_SHIFT;
- buf = kmap(page);
- rc = mdc_readpage(&sbi->ll_mdc_conn, inode->i_ino,
- S_IFDIR, offset, buf, &request);
- kunmap(page);
+ oc = ll_mdscapa_get(inode);
+ rc = md_readpage(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode),
+ oc, hash, page, &request);
+ capa_put(oc);
if (!rc) {
- body = lustre_msg_buf(request->rq_repmsg, 0);
- if (!body)
- rc = -EINVAL;
- else
- inode->i_size = body->size;
+ body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
+ /* Checked by mdc_readpage() */
+ LASSERT(body != NULL);
+
+ if (body->valid & OBD_MD_FLSIZE) {
+ ll_inode_size_lock(inode, 0);
+ i_size_write(inode, body->size);
+ ll_inode_size_unlock(inode, 0);
+ }
+ SetPageUptodate(page);
}
ptlrpc_req_finished(request);
- EXIT;
-
- readpage_out:
- if (!rc)
- SetPageUptodate(page);
unlock_page(page);
- rc = ll_unlock(LCK_PR, &lockh);
- if (rc != ELDLM_OK)
- CERROR("ll_unlock: err: %d\n", rc);
+ EXIT;
return rc;
-} /* ll_dir_readpage */
+}
struct address_space_operations ll_dir_aops = {
- readpage: ll_dir_readpage,
- prepare_write: ll_dir_prepare_write
+ .readpage = ll_dir_readpage,
};
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,3))
-int waitfor_one_page(struct page *page)
+static void ll_check_page(struct inode *dir, struct page *page)
{
- int error = 0;
- struct buffer_head *bh, *head = page->buffers;
-
- bh = head;
- do {
- wait_on_buffer(bh);
- if (buffer_req(bh) && !buffer_uptodate(bh))
- error = -EIO;
- } while ((bh = bh->b_this_page) != head);
- return error;
-}
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
-int waitfor_one_page(struct page *page)
-{
- wait_on_page_locked(page);
- return 0;
-}
-#endif
-
-/*
- * ext2 uses block-sized chunks. Arguably, sector-sized ones would be
- * more robust, but we have what we have
- */
-static inline unsigned ext2_chunk_size(struct inode *inode)
-{
- return inode->i_sb->s_blocksize;
+ /* XXX: check page format later */
+ SetPageChecked(page);
}
-static inline void ext2_put_page(struct page *page)
+static void ll_release_page(struct page *page, __u64 hash,
+ __u64 start, __u64 end)
{
kunmap(page);
+ lock_page(page);
+ if (likely(page->mapping != NULL)) {
+ ll_truncate_complete_page(page);
+ unlock_page(page);
+ } else {
+ unlock_page(page);
+ CWARN("NULL mapping page %p, truncated by others: "
+ "hash("LPX64") | start("LPX64") | end("LPX64")\n",
+ page, hash, start, end);
+ }
page_cache_release(page);
}
-static inline unsigned long dir_pages(struct inode *inode)
+/*
+ * Find, kmap and return page that contains given hash.
+ */
+static struct page *ll_dir_page_locate(struct inode *dir, __u64 hash,
+ __u64 *start, __u64 *end)
{
- return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
-}
-
-extern void set_page_clean(struct page *page);
+ struct address_space *mapping = dir->i_mapping;
+ /*
+ * Complement of hash is used as an index so that
+ * radix_tree_gang_lookup() can be used to find a page with starting
+ * hash _smaller_ than one we are looking for.
+ */
+ unsigned long offset = hash_x_index((unsigned long)hash);
+ struct page *page;
+ int found;
+
+ TREE_READ_LOCK_IRQ(mapping);
+ found = radix_tree_gang_lookup(&mapping->page_tree,
+ (void **)&page, offset, 1);
+ if (found > 0) {
+ struct lu_dirpage *dp;
+
+ page_cache_get(page);
+ TREE_READ_UNLOCK_IRQ(mapping);
+ /*
+ * In contrast to find_lock_page() we are sure that directory
+ * page cannot be truncated (while DLM lock is held) and,
+ * hence, can avoid restart.
+ *
+ * In fact, page cannot be locked here at all, because
+ * ll_dir_readpage() does synchronous io.
+ */
+ wait_on_page(page);
+ if (PageUptodate(page)) {
+ dp = kmap(page);
+ *start = le64_to_cpu(dp->ldp_hash_start);
+ *end = le64_to_cpu(dp->ldp_hash_end);
+ LASSERT(*start <= hash);
+ if (hash > *end || (*end != *start && hash == *end)) {
+ ll_release_page(page, hash, *start, *end);
+ page = NULL;
+ }
+ } else {
+ page_cache_release(page);
+ page = ERR_PTR(-EIO);
+ }
-static int ext2_commit_chunk(struct page *page, unsigned from, unsigned to)
-{
- struct inode *dir = page->mapping->host;
- loff_t new_size = (page->index << PAGE_CACHE_SHIFT) + to;
- int err = 0;
-
- dir->i_version = ++event;
- if (new_size > dir->i_size)
- dir->i_size = new_size;
- SetPageUptodate(page);
- set_page_clean(page);
-
- //page->mapping->a_ops->commit_write(NULL, page, from, to);
- //if (IS_SYNC(dir))
- // err = waitfor_one_page(page);
- return err;
+ } else {
+ TREE_READ_UNLOCK_IRQ(mapping);
+ page = NULL;
+ }
+ return page;
}
-static void ext2_check_page(struct page *page)
+struct page *ll_get_dir_page(struct inode *dir, __u64 hash, int exact,
+ struct ll_dir_chain *chain)
{
- struct inode *dir = page->mapping->host;
- unsigned chunk_size = ext2_chunk_size(dir);
- char *kaddr = page_address(page);
- // u32 max_inumber = le32_to_cpu(sb->u.ext2_sb.s_es->s_inodes_count);
- unsigned offs, rec_len;
- unsigned limit = PAGE_CACHE_SIZE;
- ext2_dirent *p;
- char *error;
-
- if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {
- limit = dir->i_size & ~PAGE_CACHE_MASK;
- if (limit & (chunk_size - 1)) {
- CERROR("limit %d dir size %lld index %ld\n",
- limit, dir->i_size, page->index);
- goto Ebadsize;
+ ldlm_policy_data_t policy = {.l_inodebits = {MDS_INODELOCK_UPDATE} };
+ struct address_space *mapping = dir->i_mapping;
+ struct lustre_handle lockh;
+ struct lu_dirpage *dp;
+ struct page *page;
+ ldlm_mode_t mode;
+ int rc;
+ __u64 start = 0;
+ __u64 end = 0;
+
+ mode = LCK_PR;
+ rc = md_lock_match(ll_i2sbi(dir)->ll_md_exp, LDLM_FL_BLOCK_GRANTED,
+ ll_inode2fid(dir), LDLM_IBITS, &policy, mode, &lockh);
+ if (!rc) {
+ struct ldlm_enqueue_info einfo = { LDLM_IBITS, mode,
+ ll_md_blocking_ast, ldlm_completion_ast,
+ NULL, NULL, dir };
+ struct lookup_intent it = { .it_op = IT_READDIR };
+ struct ptlrpc_request *request;
+ struct md_op_data *op_data;
+
+ op_data = ll_prep_md_op_data(NULL, dir, NULL, NULL, 0, 0,
+ LUSTRE_OPC_ANY, NULL);
+ if (IS_ERR(op_data))
+ return (void *)op_data;
+
+ rc = md_enqueue(ll_i2sbi(dir)->ll_md_exp, &einfo, &it,
+ op_data, &lockh, NULL, 0, NULL, 0);
+
+ ll_finish_md_op_data(op_data);
+
+ request = (struct ptlrpc_request *)it.d.lustre.it_data;
+ if (request)
+ ptlrpc_req_finished(request);
+ if (rc < 0) {
+ CERROR("lock enqueue: rc: %d\n", rc);
+ return ERR_PTR(rc);
}
- for (offs = limit; offs<PAGE_CACHE_SIZE; offs += chunk_size) {
- ext2_dirent *p = (ext2_dirent*)(kaddr + offs);
- p->rec_len = cpu_to_le16(chunk_size);
- p->name_len = 0;
- p->inode = 0;
+ } else {
+ /* for cross-ref object, l_ast_data of the lock may not be set,
+ * we reset it here */
+ md_set_lock_data(ll_i2sbi(dir)->ll_md_exp, &lockh.cookie,
+ dir, NULL);
+ }
+ ldlm_lock_dump_handle(D_OTHER, &lockh);
+
+ page = ll_dir_page_locate(dir, hash, &start, &end);
+ if (IS_ERR(page))
+ GOTO(out_unlock, page);
+
+ if (page != NULL) {
+ /*
+ * XXX nikita: not entirely correct handling of a corner case:
+ * suppose hash chain of entries with hash value HASH crosses
+ * border between pages P0 and P1. First both P0 and P1 are
+ * cached, seekdir() is called for some entry from the P0 part
+ * of the chain. Later P0 goes out of cache. telldir(HASH)
+ * happens and finds P1, as it starts with matching hash
+ * value. Remaining entries from P0 part of the chain are
+ * skipped. (Is that really a bug?)
+ *
+ * Possible solutions: 0. don't cache P1 is such case, handle
+ * it as an "overflow" page. 1. invalidate all pages at
+ * once. 2. use HASH|1 as an index for P1.
+ */
+ if (exact && hash != start) {
+ /*
+ * readdir asked for a page starting _exactly_ from
+ * given hash, but cache contains stale page, with
+ * entries with smaller hash values. Stale page should
+ * be invalidated, and new one fetched.
+ */
+ CWARN("Stale readpage page %p: "LPX64" != "LPX64"\n",
+ page, hash, start);
+ ll_release_page(page, hash, start, end);
+ } else {
+ GOTO(hash_collision, page);
}
- if (!limit)
- goto out;
}
- for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
- p = (ext2_dirent *)(kaddr + offs);
- rec_len = le16_to_cpu(p->rec_len);
-
- if (rec_len < EXT2_DIR_REC_LEN(1))
- goto Eshort;
- if (rec_len & 3)
- goto Ealign;
- if (rec_len < EXT2_DIR_REC_LEN(p->name_len))
- goto Enamelen;
- if (((offs + rec_len - 1) ^ offs) & ~(chunk_size-1))
- goto Espan;
- // if (le32_to_cpu(p->inode) > max_inumber)
- //goto Einumber;
+
+ page = read_cache_page(mapping, hash_x_index((unsigned long)hash),
+ (filler_t*)mapping->a_ops->readpage, NULL);
+ if (IS_ERR(page))
+ GOTO(out_unlock, page);
+
+ wait_on_page(page);
+ (void)kmap(page);
+ if (!PageUptodate(page))
+ goto fail;
+ if (!PageChecked(page))
+ ll_check_page(dir, page);
+ if (PageError(page))
+ goto fail;
+hash_collision:
+ dp = page_address(page);
+
+ start = le64_to_cpu(dp->ldp_hash_start);
+ end = le64_to_cpu(dp->ldp_hash_end);
+ if (end == start) {
+ LASSERT(start == hash);
+ CWARN("Page-wide hash collision: %#lx\n", (unsigned long)end);
+ /*
+ * Fetch whole overflow chain...
+ *
+ * XXX not yet.
+ */
+ goto fail;
}
- if (offs != limit)
- goto Eend;
-out:
- SetPageChecked(page);
- return;
-
- /* Too bad, we had an error */
-
-Ebadsize:
- CERROR("ext2_check_page"
- "size of directory #%lu is not a multiple of chunk size\n",
- dir->i_ino
- );
- goto fail;
-Eshort:
- error = "rec_len is smaller than minimal";
- goto bad_entry;
-Ealign:
- error = "unaligned directory entry";
- goto bad_entry;
-Enamelen:
- error = "rec_len is too small for name_len";
- goto bad_entry;
-Espan:
- error = "directory entry across blocks";
- goto bad_entry;
- //Einumber:
- // error = "inode out of bounds";
-bad_entry:
- CERROR("ext2_check_page: bad entry in directory #%lu: %s - "
- "offset=%lu, inode=%lu, rec_len=%d, name_len=%d",
- dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT)+offs,
- (unsigned long) le32_to_cpu(p->inode),
- rec_len, p->name_len);
- goto fail;
-Eend:
- p = (ext2_dirent *)(kaddr + offs);
- CERROR("ext2_check_page"
- "entry in directory #%lu spans the page boundary"
- "offset=%lu, inode=%lu",
- dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs,
- (unsigned long) le32_to_cpu(p->inode));
+out_unlock:
+ ldlm_lock_decref(&lockh, mode);
+ return page;
+
fail:
- SetPageChecked(page);
- SetPageError(page);
- LBUG();
+ ll_put_page(page);
+ page = ERR_PTR(-EIO);
+ goto out_unlock;
}
-static struct page * ll_get_page(struct inode *dir, unsigned long n)
+int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
{
- struct address_space *mapping = dir->i_mapping;
- struct page *page = read_cache_page(mapping, n,
- (filler_t*)mapping->a_ops->readpage, NULL);
- if (!IS_ERR(page)) {
- wait_on_page(page);
- kmap(page);
- if (!PageUptodate(page))
- goto fail;
- if (!PageChecked(page))
- ext2_check_page(page);
- if (PageError(page))
- goto fail;
+ struct inode *inode = filp->f_dentry->d_inode;
+ struct ll_inode_info *info = ll_i2info(inode);
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ __u64 pos = filp->f_pos;
+ struct page *page;
+ struct ll_dir_chain chain;
+ int rc;
+ int done;
+ int shift;
+ __u16 type;
+ ENTRY;
+
+ CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %lu/%llu\n",
+ inode->i_ino, inode->i_generation, inode,
+ (unsigned long)pos, i_size_read(inode));
+
+ if (pos == DIR_END_OFF)
+ /*
+ * end-of-file.
+ */
+ RETURN(0);
+
+ rc = 0;
+ done = 0;
+ shift = 0;
+ ll_dir_chain_init(&chain);
+
+ page = ll_get_dir_page(inode, pos, 0, &chain);
+
+ while (rc == 0 && !done) {
+ struct lu_dirpage *dp;
+ struct lu_dirent *ent;
+
+ if (!IS_ERR(page)) {
+ /*
+ * If page is empty (end of directory is reached),
+ * use this value.
+ */
+ __u64 hash = DIR_END_OFF;
+ __u64 next;
+
+ dp = page_address(page);
+ for (ent = lu_dirent_start(dp); ent != NULL && !done;
+ ent = lu_dirent_next(ent)) {
+ char *name;
+ int namelen;
+ struct lu_fid fid;
+ ino_t ino;
+
+ /*
+ * XXX: implement correct swabbing here.
+ */
+
+ hash = le64_to_cpu(ent->lde_hash);
+ namelen = le16_to_cpu(ent->lde_namelen);
+
+ if (hash < pos)
+ /*
+ * Skip until we find target hash
+ * value.
+ */
+ continue;
+
+ if (namelen == 0)
+ /*
+ * Skip dummy record.
+ */
+ continue;
+
+ fid = ent->lde_fid;
+ name = ent->lde_name;
+ fid_le_to_cpu(&fid, &fid);
+ ino = ll_fid_build_ino(sbi, &fid);
+ type = ll_dirent_type_get(ent);
+ done = filldir(cookie, name, namelen,
+ (loff_t)hash, ino, type);
+ }
+ next = le64_to_cpu(dp->ldp_hash_end);
+ ll_put_page(page);
+ if (!done) {
+ pos = next;
+ if (pos == DIR_END_OFF)
+ /*
+ * End of directory reached.
+ */
+ done = 1;
+ else if (1 /* chain is exhausted*/)
+ /*
+ * Normal case: continue to the next
+ * page.
+ */
+ page = ll_get_dir_page(inode, pos, 1,
+ &chain);
+ else {
+ /*
+ * go into overflow page.
+ */
+ }
+ } else
+ pos = hash;
+ } else {
+ rc = PTR_ERR(page);
+ CERROR("error reading dir "DFID" at %lu: rc %d\n",
+ PFID(&info->lli_fid), (unsigned long)pos, rc);
+ }
}
- return page;
-fail:
- ext2_put_page(page);
- return ERR_PTR(-EIO);
+ filp->f_pos = (loff_t)pos;
+ filp->f_version = inode->i_version;
+ touch_atime(filp->f_vfsmnt, filp->f_dentry);
+
+ ll_dir_chain_fini(&chain);
+
+ RETURN(rc);
}
-/*
- * NOTE! unlike strncmp, ext2_match returns 1 for success, 0 for failure.
- *
- * len <= EXT2_NAME_LEN and de != NULL are guaranteed by caller.
- */
-static inline int ext2_match (int len, const char * const name,
- struct ext2_dir_entry_2 * de)
+int ll_send_mgc_param(struct obd_export *mgc, char *string)
{
- if (len != de->name_len)
- return 0;
- if (!de->inode)
- return 0;
- return !memcmp(name, de->name, len);
+ struct mgs_send_param *msp;
+ int rc = 0;
+
+ OBD_ALLOC_PTR(msp);
+ if (!msp)
+ return -ENOMEM;
+
+ strncpy(msp->mgs_param, string, MGS_PARAM_MAXLEN);
+ rc = obd_set_info_async(mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
+ sizeof(struct mgs_send_param), msp, NULL);
+ if (rc)
+ CERROR("Failed to set parameter: %d\n", rc);
+ OBD_FREE_PTR(msp);
+
+ return rc;
}
-/*
- * p is at least 6 bytes before the end of page
- */
-static inline ext2_dirent *ext2_next_entry(ext2_dirent *p)
+char *ll_get_fsname(struct inode *inode)
{
- return (ext2_dirent *)((char*)p + le16_to_cpu(p->rec_len));
+ struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
+ char *ptr, *fsname;
+ int len;
+
+ OBD_ALLOC(fsname, MGS_PARAM_MAXLEN);
+ len = strlen(lsi->lsi_lmd->lmd_profile);
+ ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
+ if (ptr && (strcmp(ptr, "-client") == 0))
+ len -= 7;
+ strncpy(fsname, lsi->lsi_lmd->lmd_profile, len);
+ fsname[len] = '\0';
+
+ return fsname;
}
-static inline unsigned
-ext2_validate_entry(char *base, unsigned offset, unsigned mask)
+int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
+ int set_default)
{
- ext2_dirent *de = (ext2_dirent*)(base + offset);
- ext2_dirent *p = (ext2_dirent*)(base + (offset&mask));
- while ((char*)p < (char*)de)
- p = ext2_next_entry(p);
- return (char *)p - base;
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct md_op_data *op_data;
+ struct ptlrpc_request *req = NULL;
+ int rc = 0;
+ struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
+ struct obd_device *mgc = lsi->lsi_mgc;
+ char *fsname = NULL, *param = NULL;
+ int lum_size;
+
+ /*
+ * This is coming from userspace, so should be in
+ * local endian. But the MDS would like it in little
+ * endian, so we swab it before we send it.
+ */
+ switch (lump->lmm_magic) {
+ case LOV_USER_MAGIC_V1: {
+ if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
+ lustre_swab_lov_user_md_v1(lump);
+ lum_size = sizeof(struct lov_user_md_v1);
+ break;
+ }
+ case LOV_USER_MAGIC_V3: {
+ if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
+ lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lump);
+ lum_size = sizeof(struct lov_user_md_v3);
+ break;
+ }
+ default: {
+ CDEBUG(D_IOCTL, "bad userland LOV MAGIC:"
+ " %#08x != %#08x nor %#08x\n",
+ lump->lmm_magic, LOV_USER_MAGIC_V1,
+ LOV_USER_MAGIC_V3);
+ RETURN(-EINVAL);
+ }
+ }
+
+ op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
+ LUSTRE_OPC_ANY, NULL);
+ if (IS_ERR(op_data))
+ RETURN(PTR_ERR(op_data));
+
+ /* swabbing is done in lov_setstripe() on server side */
+ rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size,
+ NULL, 0, &req, NULL);
+ ll_finish_md_op_data(op_data);
+ ptlrpc_req_finished(req);
+ if (rc) {
+ if (rc != -EPERM && rc != -EACCES)
+ CERROR("mdc_setattr fails: rc = %d\n", rc);
+ }
+
+ /* In the following we use the fact that LOV_USER_MAGIC_V1 and
+ LOV_USER_MAGIC_V3 have the same initial fields so we do not
+ need the make the distiction between the 2 versions */
+ if (set_default && mgc->u.cli.cl_mgc_mgsexp) {
+ OBD_ALLOC(param, MGS_PARAM_MAXLEN);
+
+ /* Get fsname and assume devname to be -MDT0000. */
+ fsname = ll_get_fsname(inode);
+ /* Set root stripesize */
+ sprintf(param, "%s-MDT0000.lov.stripesize=%u", fsname,
+ lump->lmm_stripe_size);
+ rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
+ if (rc)
+ goto end;
+
+ /* Set root stripecount */
+ sprintf(param, "%s-MDT0000.lov.stripecount=%hd", fsname,
+ lump->lmm_stripe_count);
+ rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
+ if (rc)
+ goto end;
+
+ /* Set root stripeoffset */
+ sprintf(param, "%s-MDT0000.lov.stripeoffset=%hd", fsname,
+ lump->lmm_stripe_offset);
+ rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
+ if (rc)
+ goto end;
+end:
+ if (fsname)
+ OBD_FREE(fsname, MGS_PARAM_MAXLEN);
+ if (param)
+ OBD_FREE(param, MGS_PARAM_MAXLEN);
+ }
+ return rc;
}
-static unsigned char ext2_filetype_table[EXT2_FT_MAX] = {
- [EXT2_FT_UNKNOWN] DT_UNKNOWN,
- [EXT2_FT_REG_FILE] DT_REG,
- [EXT2_FT_DIR] DT_DIR,
- [EXT2_FT_CHRDEV] DT_CHR,
- [EXT2_FT_BLKDEV] DT_BLK,
- [EXT2_FT_FIFO] DT_FIFO,
- [EXT2_FT_SOCK] DT_SOCK,
- [EXT2_FT_SYMLINK] DT_LNK,
-};
+int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmmp,
+ int *lmm_size, struct ptlrpc_request **request)
+{
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct mdt_body *body;
+ struct lov_mds_md *lmm = NULL;
+ struct ptlrpc_request *req = NULL;
+ int rc, lmmsize;
+ struct obd_capa *oc;
+
+ rc = ll_get_max_mdsize(sbi, &lmmsize);
+ if (rc)
+ RETURN(rc);
-static unsigned int ll_dt2fmt[DT_WHT + 1] = {
- [EXT2_FT_UNKNOWN] 0,
- [EXT2_FT_REG_FILE] S_IFREG,
- [EXT2_FT_DIR] S_IFDIR,
- [EXT2_FT_CHRDEV] S_IFCHR,
- [EXT2_FT_BLKDEV] S_IFBLK,
- [EXT2_FT_FIFO] S_IFIFO,
- [EXT2_FT_SOCK] S_IFSOCK,
- [EXT2_FT_SYMLINK] S_IFLNK
-};
+ oc = ll_mdscapa_get(inode);
+ rc = md_getattr(sbi->ll_md_exp, ll_inode2fid(inode),
+ oc, OBD_MD_FLEASIZE | OBD_MD_FLDIREA,
+ lmmsize, &req);
+ capa_put(oc);
+ if (rc < 0) {
+ CDEBUG(D_INFO, "md_getattr failed on inode "
+ "%lu/%u: rc %d\n", inode->i_ino,
+ inode->i_generation, rc);
+ GOTO(out, rc);
+ }
-#define S_SHIFT 12
-static unsigned char ext2_type_by_mode[S_IFMT >> S_SHIFT] = {
- [S_IFREG >> S_SHIFT] EXT2_FT_REG_FILE,
- [S_IFDIR >> S_SHIFT] EXT2_FT_DIR,
- [S_IFCHR >> S_SHIFT] EXT2_FT_CHRDEV,
- [S_IFBLK >> S_SHIFT] EXT2_FT_BLKDEV,
- [S_IFIFO >> S_SHIFT] EXT2_FT_FIFO,
- [S_IFSOCK >> S_SHIFT] EXT2_FT_SOCK,
- [S_IFLNK >> S_SHIFT] EXT2_FT_SYMLINK,
-};
+ body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
+ LASSERT(body != NULL);
-static inline void ext2_set_de_type(ext2_dirent *de, struct inode *inode)
-{
- mode_t mode = inode->i_mode;
- de->file_type = ext2_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
+ lmmsize = body->eadatasize;
+
+ if (!(body->valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
+ lmmsize == 0) {
+ GOTO(out, rc = -ENODATA);
+ }
+
+ lmm = req_capsule_server_sized_get(&req->rq_pill,
+ &RMF_MDT_MD, lmmsize);
+ LASSERT(lmm != NULL);
+
+ /*
+ * This is coming from the MDS, so is probably in
+ * little endian. We convert it to host endian before
+ * passing it to userspace.
+ */
+ /* We don't swab objects for directories */
+ switch (le32_to_cpu(lmm->lmm_magic)) {
+ case LOV_MAGIC_V1:
+ if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
+ lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
+ break;
+ case LOV_MAGIC_V3:
+ if (LOV_MAGIC != cpu_to_le32(LOV_MAGIC))
+ lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
+ break;
+ default:
+ CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
+ rc = -EPROTO;
+ }
+out:
+ *lmmp = lmm;
+ *lmm_size = lmmsize;
+ *request = req;
+ return rc;
}
-int ll_readdir(struct file * filp, void * dirent, filldir_t filldir)
+static int ll_dir_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
{
- loff_t pos = filp->f_pos;
- struct inode *inode = filp->f_dentry->d_inode;
- // XXX struct super_block *sb = inode->i_sb;
- unsigned offset = pos & ~PAGE_CACHE_MASK;
- unsigned long n = pos >> PAGE_CACHE_SHIFT;
- unsigned long npages = dir_pages(inode);
- unsigned chunk_mask = ~(ext2_chunk_size(inode)-1);
- unsigned char *types = NULL;
- int need_revalidate = (filp->f_version != inode->i_version);
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct obd_ioctl_data *data;
ENTRY;
- if (pos > inode->i_size - EXT2_DIR_REC_LEN(1))
- GOTO(done, 0);
-
- types = ext2_filetype_table;
+ CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
+ inode->i_ino, inode->i_generation, inode, cmd);
+
+ /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
+ if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
+ return -ENOTTY;
+
+ ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
+ switch(cmd) {
+ case EXT3_IOC_GETFLAGS:
+ case EXT3_IOC_SETFLAGS:
+ RETURN(ll_iocontrol(inode, file, cmd, arg));
+ case EXT3_IOC_GETVERSION_OLD:
+ case EXT3_IOC_GETVERSION:
+ RETURN(put_user(inode->i_generation, (int *)arg));
+ /* We need to special case any other ioctls we want to handle,
+ * to send them to the MDS/OST as appropriate and to properly
+ * network encode the arg field.
+ case EXT3_IOC_SETVERSION_OLD:
+ case EXT3_IOC_SETVERSION:
+ */
+ case IOC_MDC_LOOKUP: {
+ struct ptlrpc_request *request = NULL;
+ int namelen, rc, len = 0;
+ char *buf = NULL;
+ char *filename;
+ struct obd_capa *oc;
+
+ rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
+ if (rc)
+ RETURN(rc);
+ data = (void *)buf;
+
+ filename = data->ioc_inlbuf1;
+ namelen = data->ioc_inllen1;
+
+ if (namelen < 1) {
+ CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
+ GOTO(out, rc = -EINVAL);
+ }
- for ( ; n < npages; n++, offset = 0) {
- char *kaddr, *limit;
- ext2_dirent *de;
- struct page *page;
-
- page = ll_get_page(inode, n);
+ oc = ll_mdscapa_get(inode);
+ rc = md_getattr_name(sbi->ll_md_exp, ll_inode2fid(inode), oc,
+ filename, namelen, OBD_MD_FLID, 0,
+ ll_i2suppgid(inode), &request);
+ capa_put(oc);
+ if (rc < 0) {
+ CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
+ GOTO(out, rc);
+ }
- /* size might have been updated by mdc_readpage */
- npages = dir_pages(inode);
+ ptlrpc_req_finished(request);
- if (IS_ERR(page))
- continue;
- kaddr = page_address(page);
- if (need_revalidate) {
- offset = ext2_validate_entry(kaddr, offset, chunk_mask);
- need_revalidate = 0;
+ EXIT;
+ out:
+ obd_ioctl_freedata(buf, len);
+ return rc;
+ }
+ case LL_IOC_LOV_SETSTRIPE: {
+ struct lov_user_md_v3 lumv3;
+ struct lov_user_md_v1 *lumv1 = (struct lov_user_md_v1 *)&lumv3;
+ struct lov_user_md_v1 *lumv1p = (struct lov_user_md_v1 *)arg;
+ struct lov_user_md_v3 *lumv3p = (struct lov_user_md_v3 *)arg;
+
+ int rc = 0;
+ int set_default = 0;
+
+ LASSERT(sizeof(lumv3) == sizeof(*lumv3p));
+ LASSERT(sizeof(lumv3.lmm_objects[0]) ==
+ sizeof(lumv3p->lmm_objects[0]));
+ /* first try with v1 which is smaller than v3 */
+ if (copy_from_user(lumv1, lumv1p, sizeof(*lumv1)))
+ RETURN(-EFAULT);
+
+ if (lumv1->lmm_magic == LOV_USER_MAGIC_V3) {
+ if (copy_from_user(&lumv3, lumv3p, sizeof(lumv3)))
+ RETURN(-EFAULT);
}
- de = (ext2_dirent *)(kaddr+offset);
- limit = kaddr + PAGE_CACHE_SIZE - EXT2_DIR_REC_LEN(1);
- for ( ;(char*)de <= limit; de = ext2_next_entry(de))
- if (de->inode) {
- int over;
- unsigned char d_type = DT_UNKNOWN;
-
- if (types && de->file_type < EXT2_FT_MAX)
- d_type = types[de->file_type];
-
- offset = (char *)de - kaddr;
- over = filldir(dirent, de->name, de->name_len,
- (n<<PAGE_CACHE_SHIFT) | offset,
- le32_to_cpu(de->inode), d_type);
- if (over) {
- ext2_put_page(page);
- GOTO(done,0);
- }
- }
- ext2_put_page(page);
+
+ if (inode->i_sb->s_root == file->f_dentry)
+ set_default = 1;
+
+ /* in v1 and v3 cases lumv1 points to data */
+ rc = ll_dir_setstripe(inode, lumv1, set_default);
+
+ RETURN(rc);
}
+ case LL_IOC_OBD_STATFS:
+ RETURN(ll_obd_statfs(inode, (void *)arg));
+ case LL_IOC_LOV_GETSTRIPE:
+ case LL_IOC_MDC_GETINFO:
+ case IOC_MDC_GETFILEINFO:
+ case IOC_MDC_GETFILESTRIPE: {
+ struct ptlrpc_request *request = NULL;
+ struct lov_user_md *lump;
+ struct lov_mds_md *lmm = NULL;
+ struct mdt_body *body;
+ char *filename = NULL;
+ int rc, lmmsize;
+
+ if (cmd == IOC_MDC_GETFILEINFO ||
+ cmd == IOC_MDC_GETFILESTRIPE) {
+ filename = getname((const char *)arg);
+ if (IS_ERR(filename))
+ RETURN(PTR_ERR(filename));
+
+ rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
+ &lmmsize, &request);
+ } else {
+ rc = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
+ }
-done:
- filp->f_pos = (n << PAGE_CACHE_SHIFT) | offset;
- filp->f_version = inode->i_version;
- UPDATE_ATIME(inode);
- RETURN(0);
-}
+ if (request) {
+ body = req_capsule_server_get(&request->rq_pill,
+ &RMF_MDT_BODY);
+ LASSERT(body != NULL);
+ } else {
+ GOTO(out_req, rc);
+ }
-/*
- * ext2_find_entry()
- *
- * finds an entry in the specified directory with the wanted name. It
- * returns the page in which the entry was found, and the entry itself
- * (as a parameter - res_dir). Page is returned mapped and unlocked.
- * Entry is guaranteed to be valid.
- */
-struct ext2_dir_entry_2 * ext2_find_entry (struct inode * dir,
- struct dentry *dentry, struct page ** res_page)
-{
- const char *name = dentry->d_name.name;
- int namelen = dentry->d_name.len;
- unsigned reclen = EXT2_DIR_REC_LEN(namelen);
- unsigned long start, n;
- unsigned long npages = dir_pages(dir);
- struct page *page = NULL;
- ext2_dirent * de;
-
- /* OFFSET_CACHE */
- *res_page = NULL;
-
- // start = dir->u.ext2_i.i_dir_start_lookup;
- start = 0;
- if (start >= npages)
- start = 0;
- n = start;
- do {
- char *kaddr;
- page = ll_get_page(dir, n);
- if (!IS_ERR(page)) {
- kaddr = page_address(page);
- de = (ext2_dirent *) kaddr;
- kaddr += PAGE_CACHE_SIZE - reclen;
- while ((char *) de <= kaddr) {
- if (ext2_match (namelen, name, de))
- goto found;
- de = ext2_next_entry(de);
- }
- ext2_put_page(page);
+ if (rc < 0) {
+ if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
+ cmd == LL_IOC_MDC_GETINFO))
+ GOTO(skip_lmm, rc = 0);
+ else
+ GOTO(out_req, rc);
}
- if (++n >= npages)
- n = 0;
- } while (n != start);
- return NULL;
-
-found:
- *res_page = page;
- // dir->u.ext2_i.i_dir_start_lookup = n;
- return de;
-}
-struct ext2_dir_entry_2 * ext2_dotdot (struct inode *dir, struct page **p)
-{
- struct page *page = ll_get_page(dir, 0);
- ext2_dirent *de = NULL;
+ if (cmd == IOC_MDC_GETFILESTRIPE ||
+ cmd == LL_IOC_LOV_GETSTRIPE) {
+ lump = (struct lov_user_md *)arg;
+ } else {
+ struct lov_user_mds_data *lmdp;
+ lmdp = (struct lov_user_mds_data *)arg;
+ lump = &lmdp->lmd_lmm;
+ }
+ if (copy_to_user(lump, lmm, lmmsize))
+ GOTO(out_lmm, rc = -EFAULT);
+ skip_lmm:
+ if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
+ struct lov_user_mds_data *lmdp;
+ lstat_t st = { 0 };
+
+ st.st_dev = inode->i_sb->s_dev;
+ st.st_mode = body->mode;
+ st.st_nlink = body->nlink;
+ st.st_uid = body->uid;
+ st.st_gid = body->gid;
+ st.st_rdev = body->rdev;
+ st.st_size = body->size;
+ st.st_blksize = CFS_PAGE_SIZE;
+ st.st_blocks = body->blocks;
+ st.st_atime = body->atime;
+ st.st_mtime = body->mtime;
+ st.st_ctime = body->ctime;
+ st.st_ino = inode->i_ino;
+
+ lmdp = (struct lov_user_mds_data *)arg;
+ if (copy_to_user(&lmdp->lmd_st, &st, sizeof(st)))
+ GOTO(out_lmm, rc = -EFAULT);
+ }
- if (!IS_ERR(page)) {
- de = ext2_next_entry((ext2_dirent *) page_address(page));
- *p = page;
+ EXIT;
+ out_lmm:
+ if (lmm && lmm->lmm_magic == LOV_MAGIC_JOIN)
+ OBD_FREE(lmm, lmmsize);
+ out_req:
+ ptlrpc_req_finished(request);
+ if (filename)
+ putname(filename);
+ return rc;
}
- return de;
-}
+ case IOC_LOV_GETINFO: {
+ struct lov_user_mds_data *lumd;
+ struct lov_stripe_md *lsm;
+ struct lov_user_md *lum;
+ struct lov_mds_md *lmm;
+ int lmmsize;
+ lstat_t st;
+ int rc;
+
+ lumd = (struct lov_user_mds_data *)arg;
+ lum = &lumd->lmd_lmm;
+
+ rc = ll_get_max_mdsize(sbi, &lmmsize);
+ if (rc)
+ RETURN(rc);
+
+ OBD_ALLOC(lmm, lmmsize);
+ if (copy_from_user(lmm, lum, lmmsize))
+ GOTO(free_lmm, rc = -EFAULT);
+
+ switch (lmm->lmm_magic) {
+ case LOV_USER_MAGIC_V1:
+ if (LOV_USER_MAGIC_V1 == cpu_to_le32(LOV_USER_MAGIC_V1))
+ break;
+ /* swab objects first so that stripes num will be sane */
+ lustre_swab_lov_user_md_objects(
+ ((struct lov_user_md_v1 *)lmm)->lmm_objects,
+ ((struct lov_user_md_v1 *)lmm)->lmm_stripe_count);
+ lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
+ break;
+ case LOV_USER_MAGIC_V3:
+ if (LOV_USER_MAGIC_V3 == cpu_to_le32(LOV_USER_MAGIC_V3))
+ break;
+ /* swab objects first so that stripes num will be sane */
+ lustre_swab_lov_user_md_objects(
+ ((struct lov_user_md_v3 *)lmm)->lmm_objects,
+ ((struct lov_user_md_v3 *)lmm)->lmm_stripe_count);
+ lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
+ break;
+ default:
+ GOTO(free_lmm, rc = -EINVAL);
+ }
-obd_id ll_inode_by_name(struct inode * dir, struct dentry *dentry, int *type)
-{
- obd_id res = 0;
- struct ext2_dir_entry_2 * de;
- struct page *page;
+ rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
+ if (rc < 0)
+ GOTO(free_lmm, rc = -ENOMEM);
+
+ rc = obd_checkmd(sbi->ll_dt_exp, sbi->ll_md_exp, lsm);
+ if (rc)
+ GOTO(free_lsm, rc);
- de = ext2_find_entry (dir, dentry, &page);
- if (de) {
- res = le32_to_cpu(de->inode);
- *type = ll_dt2fmt[de->file_type];
- kunmap(page);
- page_cache_release(page);
+ /* Perform glimpse_size operation. */
+ memset(&st, 0, sizeof(st));
+
+ rc = ll_glimpse_ioctl(sbi, lsm, &st);
+ if (rc)
+ GOTO(free_lsm, rc);
+
+ if (copy_to_user(&lumd->lmd_st, &st, sizeof(st)))
+ GOTO(free_lsm, rc = -EFAULT);
+
+ EXIT;
+ free_lsm:
+ obd_free_memmd(sbi->ll_dt_exp, &lsm);
+ free_lmm:
+ OBD_FREE(lmm, lmmsize);
+ return rc;
}
- return res;
-}
+ case OBD_IOC_LLOG_CATINFO: {
+ struct ptlrpc_request *req = NULL;
+ char *buf = NULL;
+ char *str;
+ int len = 0;
+ int rc;
+
+ rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
+ if (rc)
+ RETURN(rc);
+ data = (void *)buf;
+
+ if (!data->ioc_inlbuf1) {
+ obd_ioctl_freedata(buf, len);
+ RETURN(-EINVAL);
+ }
-/* Releases the page */
-void ext2_set_link(struct inode *dir, struct ext2_dir_entry_2 *de,
- struct page *page, struct inode *inode)
-{
- unsigned from = (char *) de - (char *) page_address(page);
- unsigned to = from + le16_to_cpu(de->rec_len);
- int err;
+ req = ptlrpc_request_alloc(sbi2mdc(sbi)->cl_import,
+ &RQF_LLOG_CATINFO);
+ if (req == NULL)
+ GOTO(out_catinfo, rc = -ENOMEM);
- lock_page(page);
- err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
- if (err)
- LBUG();
- de->inode = cpu_to_le32(inode->i_ino);
- ext2_set_de_type (de, inode);
- dir->i_mtime = dir->i_ctime = CURRENT_TIME;
- err = ext2_commit_chunk(page, from, to);
- unlock_page(page);
- ext2_put_page(page);
-}
+ req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
+ data->ioc_inllen1);
+ req_capsule_set_size(&req->rq_pill, &RMF_STRING, RCL_CLIENT,
+ data->ioc_inllen2);
-/*
- * Parent is locked.
- */
-int ll_add_link (struct dentry *dentry, struct inode *inode)
-{
- struct inode *dir = dentry->d_parent->d_inode;
- const char *name = dentry->d_name.name;
- int namelen = dentry->d_name.len;
- unsigned reclen = EXT2_DIR_REC_LEN(namelen);
- unsigned short rec_len, name_len;
- struct page *page = NULL;
- ext2_dirent * de;
- unsigned long npages = dir_pages(dir);
- unsigned long n;
- char *kaddr;
- unsigned from, to;
- int err;
-
- /* We take care of directory expansion in the same loop */
- for (n = 0; n <= npages; n++) {
- page = ll_get_page(dir, n);
- err = PTR_ERR(page);
- if (IS_ERR(page))
- goto out;
- kaddr = page_address(page);
- de = (ext2_dirent *)kaddr;
- kaddr += PAGE_CACHE_SIZE - reclen;
- while ((char *)de <= kaddr) {
- err = -EEXIST;
- if (ext2_match (namelen, name, de))
- goto out_page;
- name_len = EXT2_DIR_REC_LEN(de->name_len);
- rec_len = le16_to_cpu(de->rec_len);
- if ( n==npages && rec_len == 0) {
- CERROR("Fatal dir behaviour\n");
- goto out_page;
- }
- if (!de->inode && rec_len >= reclen)
- goto got_it;
- if (rec_len >= name_len + reclen)
- goto got_it;
- de = (ext2_dirent *) ((char *) de + rec_len);
+ rc = ptlrpc_request_pack(req, LUSTRE_LOG_VERSION, LLOG_CATINFO);
+ if (rc) {
+ ptlrpc_request_free(req);
+ GOTO(out_catinfo, rc);
}
- ext2_put_page(page);
+
+ str = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
+ memcpy(str, data->ioc_inlbuf1, data->ioc_inllen1);
+ if (data->ioc_inllen2) {
+ str = req_capsule_client_get(&req->rq_pill,
+ &RMF_STRING);
+ memcpy(str, data->ioc_inlbuf2, data->ioc_inllen2);
+ }
+
+ req_capsule_set_size(&req->rq_pill, &RMF_STRING, RCL_SERVER,
+ data->ioc_plen1);
+ ptlrpc_request_set_replen(req);
+
+ rc = ptlrpc_queue_wait(req);
+ if (!rc) {
+ str = req_capsule_server_get(&req->rq_pill,
+ &RMF_STRING);
+ if (copy_to_user(data->ioc_pbuf1, str, data->ioc_plen1))
+ rc = -EFAULT;
+ }
+ ptlrpc_req_finished(req);
+ out_catinfo:
+ obd_ioctl_freedata(buf, len);
+ RETURN(rc);
}
- LBUG();
- return -EINVAL;
+ case OBD_IOC_QUOTACHECK: {
+ struct obd_quotactl *oqctl;
+ int rc, error = 0;
+
+ if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
+ sbi->ll_flags & LL_SBI_RMT_CLIENT)
+ RETURN(-EPERM);
+
+ OBD_ALLOC_PTR(oqctl);
+ if (!oqctl)
+ RETURN(-ENOMEM);
+ oqctl->qc_type = arg;
+ rc = obd_quotacheck(sbi->ll_md_exp, oqctl);
+ if (rc < 0) {
+ CDEBUG(D_INFO, "md_quotacheck failed: rc %d\n", rc);
+ error = rc;
+ }
-got_it:
- from = (char*)de - (char*)page_address(page);
- to = from + rec_len;
- lock_page(page);
- err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
- if (err)
- goto out_unlock;
- if (de->inode) {
- ext2_dirent *de1 = (ext2_dirent *) ((char *) de + name_len);
- de1->rec_len = cpu_to_le16(rec_len - name_len);
- de->rec_len = cpu_to_le16(name_len);
- de = de1;
+ rc = obd_quotacheck(sbi->ll_dt_exp, oqctl);
+ if (rc < 0)
+ CDEBUG(D_INFO, "obd_quotacheck failed: rc %d\n", rc);
+
+ OBD_FREE_PTR(oqctl);
+ return error ?: rc;
}
- de->name_len = namelen;
- memcpy (de->name, name, namelen);
- de->inode = cpu_to_le32(inode->i_ino);
- ext2_set_de_type (de, inode);
- CDEBUG(D_INODE, "type set to %o\n", de->file_type);
- dir->i_mtime = dir->i_ctime = CURRENT_TIME;
- err = ext2_commit_chunk(page, from, to);
+ case OBD_IOC_POLL_QUOTACHECK: {
+ struct if_quotacheck *check;
+ int rc;
+
+ if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
+ sbi->ll_flags & LL_SBI_RMT_CLIENT)
+ RETURN(-EPERM);
+
+ OBD_ALLOC_PTR(check);
+ if (!check)
+ RETURN(-ENOMEM);
+
+ rc = obd_iocontrol(cmd, sbi->ll_md_exp, 0, (void *)check,
+ NULL);
+ if (rc) {
+ CDEBUG(D_QUOTA, "mdc ioctl %d failed: %d\n", cmd, rc);
+ if (copy_to_user((void *)arg, check, sizeof(*check)))
+ rc = -EFAULT;
+ GOTO(out_poll, rc);
+ }
- // change_inode happens with the commit_chunk
- /* XXX OFFSET_CACHE */
+ rc = obd_iocontrol(cmd, sbi->ll_dt_exp, 0, (void *)check,
+ NULL);
+ if (rc) {
+ CDEBUG(D_QUOTA, "osc ioctl %d failed: %d\n", cmd, rc);
+ if (copy_to_user((void *)arg, check, sizeof(*check)))
+ rc = -EFAULT;
+ GOTO(out_poll, rc);
+ }
+ out_poll:
+ OBD_FREE_PTR(check);
+ RETURN(rc);
+ }
+ case OBD_IOC_QUOTACTL: {
+ struct if_quotactl *qctl;
+ int cmd, type, id, valid, rc = 0;
+
+ OBD_ALLOC_PTR(qctl);
+ if (!qctl)
+ RETURN(-ENOMEM);
+
+ if (copy_from_user(qctl, (void *)arg, sizeof(*qctl)))
+ GOTO(out_quotactl, rc = -EFAULT);
+
+ cmd = qctl->qc_cmd;
+ type = qctl->qc_type;
+ id = qctl->qc_id;
+ valid = qctl->qc_valid;
+
+ switch (cmd) {
+ case LUSTRE_Q_INVALIDATE:
+ case LUSTRE_Q_FINVALIDATE:
+ case Q_QUOTAON:
+ case Q_QUOTAOFF:
+ case Q_SETQUOTA:
+ case Q_SETINFO:
+ if (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
+ sbi->ll_flags & LL_SBI_RMT_CLIENT)
+ GOTO(out_quotactl, rc = -EPERM);
+ break;
+ case Q_GETQUOTA:
+ if (((type == USRQUOTA && current->euid != id) ||
+ (type == GRPQUOTA && !in_egroup_p(id))) &&
+ (!cfs_capable(CFS_CAP_SYS_ADMIN) ||
+ sbi->ll_flags & LL_SBI_RMT_CLIENT))
+ GOTO(out_quotactl, rc = -EPERM);
+ break;
+ case Q_GETINFO:
+ break;
+ default:
+ CERROR("unsupported quotactl op: %#x\n", cmd);
+ GOTO(out_quotactl, rc = -ENOTTY);
+ }
-out_unlock:
- unlock_page(page);
-out_page:
- ext2_put_page(page);
-out:
- return err;
-}
+ if (valid != QC_GENERAL) {
+ if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
+ GOTO(out_quotactl, rc = -EOPNOTSUPP);
+
+ if (cmd == Q_GETINFO)
+ qctl->qc_cmd = Q_GETOINFO;
+ else if (cmd == Q_GETQUOTA)
+ qctl->qc_cmd = Q_GETOQUOTA;
+ else
+ GOTO(out_quotactl, rc = -EINVAL);
+
+ switch (valid) {
+ case QC_MDTIDX:
+ rc = obd_iocontrol(OBD_IOC_QUOTACTL,
+ sbi->ll_md_exp,
+ sizeof(*qctl), qctl, NULL);
+ break;
+ case QC_OSTIDX:
+ rc = obd_iocontrol(OBD_IOC_QUOTACTL,
+ sbi->ll_dt_exp,
+ sizeof(*qctl), qctl, NULL);
+ break;
+ case QC_UUID:
+ rc = obd_iocontrol(OBD_IOC_QUOTACTL,
+ sbi->ll_md_exp,
+ sizeof(*qctl), qctl, NULL);
+ if (rc == -EAGAIN)
+ rc = obd_iocontrol(OBD_IOC_QUOTACTL,
+ sbi->ll_dt_exp,
+ sizeof(*qctl), qctl,
+ NULL);
+ break;
+ default:
+ rc = -EINVAL;
+ break;
+ }
-/*
- * ext2_delete_entry deletes a directory entry by merging it with the
- * previous entry. Page is up-to-date. Releases the page.
- */
-int ext2_delete_entry (struct ext2_dir_entry_2 * dir, struct page * page )
-{
- struct address_space *mapping = page->mapping;
- struct inode *inode = mapping->host;
- char *kaddr = page_address(page);
- unsigned from = ((char*)dir - kaddr) & ~(ext2_chunk_size(inode)-1);
- unsigned to = ((char*)dir - kaddr) + le16_to_cpu(dir->rec_len);
- ext2_dirent * pde = NULL;
- ext2_dirent * de = (ext2_dirent *) (kaddr + from);
- int err;
-
- while ((char*)de < (char*)dir) {
- pde = de;
- de = ext2_next_entry(de);
+ if (rc)
+ GOTO(out_quotactl, rc);
+ else
+ qctl->qc_cmd = cmd;
+ } else {
+ struct obd_quotactl *oqctl;
+
+ OBD_ALLOC_PTR(oqctl);
+ if (!oqctl)
+ GOTO(out_quotactl, rc = -ENOMEM);
+
+ QCTL_COPY(oqctl, qctl);
+ rc = obd_quotactl(sbi->ll_md_exp, oqctl);
+ if (rc) {
+ if (rc != -EBUSY && cmd == Q_QUOTAON) {
+ oqctl->qc_cmd = Q_QUOTAOFF;
+ obd_quotactl(sbi->ll_md_exp, oqctl);
+ }
+ OBD_FREE_PTR(oqctl);
+ GOTO(out_quotactl, rc);
+ } else {
+ QCTL_COPY(qctl, oqctl);
+ OBD_FREE_PTR(oqctl);
+ }
+ }
+
+ if (copy_to_user((void *)arg, qctl, sizeof(*qctl)))
+ rc = -EFAULT;
+
+ out_quotactl:
+ OBD_FREE_PTR(qctl);
+ RETURN(rc);
}
- if (pde)
- from = (char*)pde - (char*)page_address(page);
- lock_page(page);
- err = mapping->a_ops->prepare_write(NULL, page, from, to);
- if (err)
- LBUG();
- if (pde)
- pde->rec_len = cpu_to_le16(to-from);
- dir->inode = 0;
- inode->i_ctime = inode->i_mtime = CURRENT_TIME;
- err = ext2_commit_chunk(page, from, to);
- unlock_page(page);
- ext2_put_page(page);
- return err;
-}
+ case OBD_IOC_GETNAME: {
+ struct obd_device *obd = class_exp2obd(sbi->ll_dt_exp);
+ if (!obd)
+ RETURN(-EFAULT);
+ if (copy_to_user((void *)arg, obd->obd_name,
+ strlen(obd->obd_name) + 1))
+ RETURN (-EFAULT);
+ RETURN(0);
+ }
+ case LL_IOC_FLUSHCTX:
+ RETURN(ll_flush_ctx(inode));
+#ifdef CONFIG_FS_POSIX_ACL
+ case LL_IOC_RMTACL: {
+ if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
+ inode == inode->i_sb->s_root->d_inode) {
+ struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
+ int rc;
+
+ LASSERT(fd != NULL);
+ rc = rct_add(&sbi->ll_rct, cfs_curproc_pid(), arg);
+ if (!rc)
+ fd->fd_flags |= LL_FILE_RMTACL;
+ RETURN(rc);
+ } else
+ RETURN(0);
+ }
+#endif
+ case LL_IOC_GETOBDCOUNT: {
+ int count;
+
+ if (copy_from_user(&count, (int *)arg, sizeof(int)))
+ RETURN(-EFAULT);
+
+ if (!count) {
+ /* get ost count */
+ struct lov_obd *lov = &sbi->ll_dt_exp->exp_obd->u.lov;
+ count = lov->desc.ld_tgt_count;
+ } else {
+ /* get mdt count */
+ struct lmv_obd *lmv = &sbi->ll_md_exp->exp_obd->u.lmv;
+ count = lmv->desc.ld_tgt_count;
+ }
-/*
- * Set the first fragment of directory.
- */
-int ext2_make_empty(struct inode *inode, struct inode *parent)
-{
- struct address_space *mapping = inode->i_mapping;
- struct page *page = grab_cache_page(mapping, 0);
- unsigned chunk_size = ext2_chunk_size(inode);
- struct ext2_dir_entry_2 * de;
- char *base;
- int err;
- ENTRY;
+ if (copy_to_user((int *)arg, &count, sizeof(int)))
+ RETURN(-EFAULT);
- if (!page)
- return -ENOMEM;
- base = kmap(page);
- if (!base)
- return -ENOMEM;
+ RETURN(0);
+ }
+ case LL_IOC_PATH2FID:
+ if (copy_to_user((void *)arg, &ll_i2info(inode)->lli_fid,
+ sizeof(struct lu_fid)))
+ RETURN(-EFAULT);
+ RETURN(0);
+ case OBD_IOC_CHANGELOG_CLEAR: {
+ struct ioc_changelog_clear *icc;
+ int rc;
+
+ OBD_ALLOC_PTR(icc);
+ if (icc == NULL)
+ RETURN(-ENOMEM);
+ if (copy_from_user(icc, (void *)arg, sizeof(*icc)))
+ GOTO(icc_free, rc = -EFAULT);
+
+ rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(*icc), icc,NULL);
+
+icc_free:
+ OBD_FREE_PTR(icc);
+ RETURN(rc);
+ }
+ case OBD_IOC_FID2PATH:
+ RETURN(ll_fid2path(ll_i2mdexp(inode), (void *)arg));
- err = mapping->a_ops->prepare_write(NULL, page, 0, chunk_size);
- if (err)
- goto fail;
+ default:
+ RETURN(obd_iocontrol(cmd, sbi->ll_dt_exp,0,NULL,(void *)arg));
+ }
+}
- de = (struct ext2_dir_entry_2 *) base;
- de->name_len = 1;
- de->rec_len = cpu_to_le16(EXT2_DIR_REC_LEN(1));
- memcpy (de->name, ".\0\0", 4);
- de->inode = cpu_to_le32(inode->i_ino);
- ext2_set_de_type (de, inode);
-
- de = (struct ext2_dir_entry_2 *) (base + EXT2_DIR_REC_LEN(1));
- de->name_len = 2;
- de->rec_len = cpu_to_le16(chunk_size - EXT2_DIR_REC_LEN(1));
- de->inode = cpu_to_le32(parent->i_ino);
- memcpy (de->name, "..\0", 4);
- ext2_set_de_type (de, inode);
-
- err = ext2_commit_chunk(page, 0, chunk_size);
-fail:
- kunmap(page);
- unlock_page(page);
- page_cache_release(page);
+int ll_dir_open(struct inode *inode, struct file *file)
+{
ENTRY;
- return err;
+ RETURN(ll_file_open(inode, file));
}
-/*
- * routine to check that the specified directory is empty (for rmdir)
- */
-int ext2_empty_dir (struct inode * inode)
+int ll_dir_release(struct inode *inode, struct file *file)
{
- struct page *page = NULL;
- unsigned long i, npages = dir_pages(inode);
-
- for (i = 0; i < npages; i++) {
- char *kaddr;
- ext2_dirent * de;
- page = ll_get_page(inode, i);
-
- if (IS_ERR(page))
- continue;
-
- kaddr = page_address(page);
- de = (ext2_dirent *)kaddr;
- kaddr += PAGE_CACHE_SIZE-EXT2_DIR_REC_LEN(1);
-
- while ((char *)de <= kaddr) {
- if (de->inode != 0) {
- /* check for . and .. */
- if (de->name[0] != '.')
- goto not_empty;
- if (de->name_len > 2)
- goto not_empty;
- if (de->name_len < 2) {
- if (de->inode !=
- cpu_to_le32(inode->i_ino))
- goto not_empty;
- } else if (de->name[1] != '.')
- goto not_empty;
- }
- de = ext2_next_entry(de);
- }
- ext2_put_page(page);
- }
- return 1;
-
-not_empty:
- ext2_put_page(page);
- return 0;
+ ENTRY;
+ RETURN(ll_file_release(inode, file));
}
struct file_operations ll_dir_operations = {
- read: generic_read_dir,
- readdir: ll_readdir
+ .open = ll_dir_open,
+ .release = ll_dir_release,
+ .read = generic_read_dir,
+ .readdir = ll_readdir,
+ .ioctl = ll_dir_ioctl
};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff