#endif
/* for kernels 2.6.18 and later */
+#define FSFILT_SINGLEDATA_TRANS_BLOCKS(sb) EXT3_SINGLEDATA_TRANS_BLOCKS(sb)
+
#define fsfilt_ext3_ext_insert_extent(handle, inode, path, newext, flag) \
ext3_ext_insert_extent(handle, inode, path, newext, flag)
#define ext3_mb_discard_inode_preallocations(inode) \
ext3_discard_preallocations(inode)
+#define fsfilt_log_start_commit(journal, tid) jbd2_log_start_commit(journal, tid)
+#define fsfilt_log_wait_commit(journal, tid) jbd2_log_wait_commit(journal, tid)
+
+static struct kmem_cache *fcb_cache;
+
+struct fsfilt_cb_data {
+ struct ext4_journal_cb_entry cb_jcb; /* private data - MUST BE FIRST */
+ fsfilt_cb_t cb_func; /* MDS/OBD completion function */
+ struct obd_device *cb_obd; /* MDS/OBD completion device */
+ __u64 cb_last_rcvd; /* MDS/OST last committed operation */
+ void *cb_data; /* MDS/OST completion function data */
+};
+
+static char *fsfilt_ext3_get_label(struct super_block *sb)
+{
+ return EXT3_SB(sb)->s_es->s_volume_name;
+}
+
+/* kernel has ext4_blocks_for_truncate since linux-3.1.1 */
+#ifdef HAVE_BLOCKS_FOR_TRUNCATE
+# include <ext4/truncate.h>
+#else
+static inline unsigned long ext4_blocks_for_truncate(struct inode *inode)
+{
+ ext4_lblk_t needed;
+
+ needed = inode->i_blocks >> (inode->i_sb->s_blocksize_bits - 9);
+ if (needed < 2)
+ needed = 2;
+ if (needed > EXT4_MAX_TRANS_DATA)
+ needed = EXT4_MAX_TRANS_DATA;
+ return EXT4_DATA_TRANS_BLOCKS(inode->i_sb) + needed;
+}
+#endif
+
+/*
+ * We don't currently need any additional blocks for rmdir and
+ * unlink transactions because we are storing the OST oa_id inside
+ * the inode (which we will be changing anyways as part of this
+ * transaction).
+ */
+static void *fsfilt_ext3_start(struct inode *inode, int op, void *desc_private,
+ int logs)
+{
+ /* For updates to the last received file */
+ int nblocks = FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
+ journal_t *journal;
+ void *handle;
+
+ if (current->journal_info) {
+ CDEBUG(D_INODE, "increasing refcount on %p\n",
+ current->journal_info);
+ goto journal_start;
+ }
+
+ switch(op) {
+ case FSFILT_OP_UNLINK:
+ /* delete one file + create/update logs for each stripe */
+ nblocks += EXT3_DELETE_TRANS_BLOCKS(inode->i_sb);
+ nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
+ FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
+ break;
+ case FSFILT_OP_CANCEL_UNLINK:
+ LASSERT(logs == 1);
+
+ /* blocks for log header bitmap update OR
+ * blocks for catalog header bitmap update + unlink of logs +
+ * blocks for delete the inode (include blocks truncating). */
+ nblocks = (LLOG_CHUNK_SIZE >> inode->i_blkbits) +
+ EXT3_DELETE_TRANS_BLOCKS(inode->i_sb) +
+ ext4_blocks_for_truncate(inode) + 3;
+ break;
+ default: CERROR("unknown transaction start op %d\n", op);
+ LBUG();
+ }
+
+ LASSERT(current->journal_info == desc_private);
+ journal = EXT3_SB(inode->i_sb)->s_journal;
+ if (nblocks > journal->j_max_transaction_buffers) {
+ CWARN("too many credits %d for op %ux%u using %d instead\n",
+ nblocks, op, logs, journal->j_max_transaction_buffers);
+ nblocks = journal->j_max_transaction_buffers;
+ }
+
+ journal_start:
+ LASSERTF(nblocks > 0, "can't start %d credit transaction\n", nblocks);
+ handle = ext3_journal_start(inode, nblocks);
+
+ if (!IS_ERR(handle))
+ LASSERT(current->journal_info == handle);
+ else
+ CERROR("error starting handle for op %u (%u credits): rc %ld\n",
+ op, nblocks, PTR_ERR(handle));
+ return handle;
+}
+
+static int fsfilt_ext3_commit(struct inode *inode, void *h, int force_sync)
+{
+ int rc;
+ handle_t *handle = h;
+
+ LASSERT(current->journal_info == handle);
+ if (force_sync)
+ handle->h_sync = 1; /* recovery likes this */
+
+ rc = ext3_journal_stop(handle);
+
+ return rc;
+}
+
#ifndef EXT3_EXTENTS_FL
#define EXT3_EXTENTS_FL 0x00080000 /* Inode uses extents */
#endif
return rc;
}
+int fsfilt_ext3_read(struct inode *inode, void *buf, int size, loff_t *offs)
+{
+ unsigned long block;
+ struct buffer_head *bh;
+ int err, blocksize, csize, boffs, osize = size;
+
+ /* prevent reading after eof */
+ spin_lock(&inode->i_lock);
+ if (i_size_read(inode) < *offs + size) {
+ size = i_size_read(inode) - *offs;
+ spin_unlock(&inode->i_lock);
+ if (size < 0) {
+ CDEBUG(D_EXT2, "size %llu is too short for read @%llu\n",
+ i_size_read(inode), *offs);
+ return -EBADR;
+ } else if (size == 0) {
+ return 0;
+ }
+ } else {
+ spin_unlock(&inode->i_lock);
+ }
+
+ blocksize = 1 << inode->i_blkbits;
+
+ while (size > 0) {
+ block = *offs >> inode->i_blkbits;
+ boffs = *offs & (blocksize - 1);
+ csize = min(blocksize - boffs, size);
+ bh = ext3_bread(NULL, inode, block, 0, &err);
+ if (!bh) {
+ CERROR("can't read block: %d\n", err);
+ return err;
+ }
+
+ memcpy(buf, bh->b_data + boffs, csize);
+ brelse(bh);
+
+ *offs += csize;
+ buf += csize;
+ size -= csize;
+ }
+ return osize;
+}
+EXPORT_SYMBOL(fsfilt_ext3_read);
+
+static int fsfilt_ext3_read_record(struct file * file, void *buf,
+ int size, loff_t *offs)
+{
+ int rc;
+ rc = fsfilt_ext3_read(file->f_dentry->d_inode, buf, size, offs);
+ if (rc > 0)
+ rc = 0;
+ return rc;
+}
+
+int fsfilt_ext3_write_handle(struct inode *inode, void *buf, int bufsize,
+ loff_t *offs, handle_t *handle)
+{
+ struct buffer_head *bh = NULL;
+ loff_t old_size = i_size_read(inode), offset = *offs;
+ loff_t new_size = i_size_read(inode);
+ unsigned long block;
+ int err = 0, blocksize = 1 << inode->i_blkbits, size, boffs;
+
+ while (bufsize > 0) {
+ if (bh != NULL)
+ brelse(bh);
+
+ block = offset >> inode->i_blkbits;
+ boffs = offset & (blocksize - 1);
+ size = min(blocksize - boffs, bufsize);
+ bh = ext3_bread(handle, inode, block, 1, &err);
+ if (!bh) {
+ CERROR("can't read/create block: %d\n", err);
+ break;
+ }
+
+ err = ext3_journal_get_write_access(handle, bh);
+ if (err) {
+ CERROR("journal_get_write_access() returned error %d\n",
+ err);
+ break;
+ }
+ LASSERT(bh->b_data + boffs + size <= bh->b_data + bh->b_size);
+ memcpy(bh->b_data + boffs, buf, size);
+ err = ext3_journal_dirty_metadata(handle, bh);
+ if (err) {
+ CERROR("journal_dirty_metadata() returned error %d\n",
+ err);
+ break;
+ }
+ if (offset + size > new_size)
+ new_size = offset + size;
+ offset += size;
+ bufsize -= size;
+ buf += size;
+ }
+ if (bh)
+ brelse(bh);
+
+ /* correct in-core and on-disk sizes */
+ if (new_size > i_size_read(inode)) {
+ spin_lock(&inode->i_lock);
+ if (new_size > i_size_read(inode))
+ i_size_write(inode, new_size);
+ if (i_size_read(inode) > EXT3_I(inode)->i_disksize)
+ EXT3_I(inode)->i_disksize = i_size_read(inode);
+ if (i_size_read(inode) > old_size) {
+ spin_unlock(&inode->i_lock);
+ mark_inode_dirty(inode);
+ } else {
+ spin_unlock(&inode->i_lock);
+ }
+ }
+
+ if (err == 0)
+ *offs = offset;
+ return err;
+}
+EXPORT_SYMBOL(fsfilt_ext3_write_handle);
+
+static int fsfilt_ext3_write_record(struct file *file, void *buf, int bufsize,
+ loff_t *offs, int force_sync)
+{
+ struct inode *inode = file->f_dentry->d_inode;
+ handle_t *handle;
+ int err, block_count = 0, blocksize;
+
+ /* Determine how many transaction credits are needed */
+ blocksize = 1 << inode->i_blkbits;
+ block_count = (*offs & (blocksize - 1)) + bufsize;
+ block_count = (block_count + blocksize - 1) >> inode->i_blkbits;
+
+ handle = ext3_journal_start(inode,
+ block_count * EXT3_DATA_TRANS_BLOCKS(inode->i_sb) + 2);
+ if (IS_ERR(handle)) {
+ CERROR("can't start transaction for %d blocks (%d bytes)\n",
+ block_count * EXT3_DATA_TRANS_BLOCKS(inode->i_sb) + 2,
+ bufsize);
+ return PTR_ERR(handle);
+ }
+
+ err = fsfilt_ext3_write_handle(inode, buf, bufsize, offs, handle);
+
+ if (!err && force_sync)
+ handle->h_sync = 1; /* recovery likes this */
+
+ ext3_journal_stop(handle);
+
+ return err;
+}
+
+static int fsfilt_ext3_setup(struct super_block *sb)
+{
+ if (!EXT3_HAS_COMPAT_FEATURE(sb,
+ EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
+ CERROR("ext3 mounted without journal\n");
+ return -EINVAL;
+ }
+
+#ifdef S_PDIROPS
+ CWARN("Enabling PDIROPS\n");
+ set_opt(EXT3_SB(sb)->s_mount_opt, PDIROPS);
+ sb->s_flags |= S_PDIROPS;
+#endif
+ if (!EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_DIR_INDEX))
+ CWARN("filesystem doesn't have dir_index feature enabled\n");
+ return 0;
+}
static struct fsfilt_operations fsfilt_ext3_ops = {
- .fs_type = "ext3",
- .fs_owner = THIS_MODULE,
- .fs_map_inode_pages = fsfilt_ext3_map_inode_pages,
+ .fs_type = "ext3",
+ .fs_owner = THIS_MODULE,
+ .fs_getlabel = fsfilt_ext3_get_label,
+ .fs_start = fsfilt_ext3_start,
+ .fs_commit = fsfilt_ext3_commit,
+ .fs_map_inode_pages = fsfilt_ext3_map_inode_pages,
+ .fs_write_record = fsfilt_ext3_write_record,
+ .fs_read_record = fsfilt_ext3_read_record,
+ .fs_setup = fsfilt_ext3_setup,
};
static int __init fsfilt_ext3_init(void)
{
- return fsfilt_register_ops(&fsfilt_ext3_ops);
+ int rc;
+
+ fcb_cache = kmem_cache_create("fsfilt_ext3_fcb",
+ sizeof(struct fsfilt_cb_data),
+ 0, 0, NULL);
+ if (!fcb_cache) {
+ CERROR("error allocating fsfilt journal callback cache\n");
+ GOTO(out, rc = -ENOMEM);
+ }
+
+ rc = fsfilt_register_ops(&fsfilt_ext3_ops);
+
+ if (rc)
+ kmem_cache_destroy(fcb_cache);
+out:
+ return rc;
}
static void __exit fsfilt_ext3_exit(void)
{
fsfilt_unregister_ops(&fsfilt_ext3_ops);
+ kmem_cache_destroy(fcb_cache);
}
module_init(fsfilt_ext3_init);
--- /dev/null
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * 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.
+ *
+ * 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).
+ *
+ * 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.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2013, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/obdclass/llog_lvfs.c
+ *
+ * OST<->MDS recovery logging infrastructure.
+ * Invariants in implementation:
+ * - we do not share logs among different OST<->MDS connections, so that
+ * if an OST or MDS fails it need only look at log(s) relevant to itself
+ *
+ * Author: Andreas Dilger <adilger@clusterfs.com>
+ */
+
+#define DEBUG_SUBSYSTEM S_LOG
+
+#ifndef __KERNEL__
+#include <liblustre.h>
+#endif
+
+#include <obd.h>
+#include <obd_class.h>
+#include <lustre_log.h>
+#include <obd_ost.h>
+#include <libcfs/list.h>
+#include <lvfs.h>
+#include <lustre_fsfilt.h>
+#include <lustre_disk.h>
+#include "llog_internal.h"
+
+#if defined(__KERNEL__) && defined(LLOG_LVFS)
+
+static int llog_lvfs_pad(struct obd_device *obd, struct l_file *file,
+ int len, int index)
+{
+ struct llog_rec_hdr rec = { 0 };
+ struct llog_rec_tail tail;
+ int rc;
+ ENTRY;
+
+ LASSERT(len >= LLOG_MIN_REC_SIZE && (len & 0x7) == 0);
+
+ tail.lrt_len = rec.lrh_len = len;
+ tail.lrt_index = rec.lrh_index = index;
+ rec.lrh_type = LLOG_PAD_MAGIC;
+
+ rc = fsfilt_write_record(obd, file, &rec, sizeof(rec), &file->f_pos, 0);
+ if (rc) {
+ CERROR("error writing padding record: rc %d\n", rc);
+ goto out;
+ }
+
+ file->f_pos += len - sizeof(rec) - sizeof(tail);
+ rc = fsfilt_write_record(obd, file, &tail, sizeof(tail),&file->f_pos,0);
+ if (rc) {
+ CERROR("error writing padding record: rc %d\n", rc);
+ goto out;
+ }
+
+ out:
+ RETURN(rc);
+}
+
+static int llog_lvfs_write_blob(struct obd_device *obd, struct l_file *file,
+ struct llog_rec_hdr *rec, void *buf, loff_t off)
+{
+ int rc;
+ struct llog_rec_tail end;
+ loff_t saved_off = file->f_pos;
+ int buflen = rec->lrh_len;
+
+ ENTRY;
+
+ file->f_pos = off;
+
+ if (buflen == 0)
+ CWARN("0-length record\n");
+
+ if (!buf) {
+ rc = fsfilt_write_record(obd, file, rec, buflen,&file->f_pos,0);
+ if (rc) {
+ CERROR("error writing log record: rc %d\n", rc);
+ goto out;
+ }
+ GOTO(out, rc = 0);
+ }
+
+ /* the buf case */
+ rec->lrh_len = sizeof(*rec) + buflen + sizeof(end);
+ rc = fsfilt_write_record(obd, file, rec, sizeof(*rec), &file->f_pos, 0);
+ if (rc) {
+ CERROR("error writing log hdr: rc %d\n", rc);
+ goto out;
+ }
+
+ rc = fsfilt_write_record(obd, file, buf, buflen, &file->f_pos, 0);
+ if (rc) {
+ CERROR("error writing log buffer: rc %d\n", rc);
+ goto out;
+ }
+
+ end.lrt_len = rec->lrh_len;
+ end.lrt_index = rec->lrh_index;
+ rc = fsfilt_write_record(obd, file, &end, sizeof(end), &file->f_pos, 0);
+ if (rc) {
+ CERROR("error writing log tail: rc %d\n", rc);
+ goto out;
+ }
+
+ rc = 0;
+ out:
+ if (saved_off > file->f_pos)
+ file->f_pos = saved_off;
+ LASSERT(rc <= 0);
+ RETURN(rc);
+}
+
+static int llog_lvfs_read_blob(struct obd_device *obd, struct l_file *file,
+ void *buf, int size, loff_t off)
+{
+ loff_t offset = off;
+ int rc;
+ ENTRY;
+
+ rc = fsfilt_read_record(obd, file, buf, size, &offset);
+ if (rc) {
+ CERROR("error reading log record: rc %d\n", rc);
+ RETURN(rc);
+ }
+ RETURN(0);
+}
+
+static int llog_lvfs_read_header(const struct lu_env *env,
+ struct llog_handle *handle)
+{
+ struct obd_device *obd;
+ int rc;
+ ENTRY;
+
+ LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
+
+ obd = handle->lgh_ctxt->loc_exp->exp_obd;
+
+ if (i_size_read(handle->lgh_file->f_dentry->d_inode) == 0) {
+ CDEBUG(D_HA, "not reading header from 0-byte log\n");
+ RETURN(LLOG_EEMPTY);
+ }
+
+ rc = llog_lvfs_read_blob(obd, handle->lgh_file, handle->lgh_hdr,
+ LLOG_CHUNK_SIZE, 0);
+ if (rc) {
+ CERROR("error reading log header from %.*s\n",
+ handle->lgh_file->f_dentry->d_name.len,
+ handle->lgh_file->f_dentry->d_name.name);
+ } else {
+ struct llog_rec_hdr *llh_hdr = &handle->lgh_hdr->llh_hdr;
+
+ if (LLOG_REC_HDR_NEEDS_SWABBING(llh_hdr))
+ lustre_swab_llog_hdr(handle->lgh_hdr);
+
+ if (llh_hdr->lrh_type != LLOG_HDR_MAGIC) {
+ CERROR("bad log %.*s header magic: %#x (expected %#x)\n",
+ handle->lgh_file->f_dentry->d_name.len,
+ handle->lgh_file->f_dentry->d_name.name,
+ llh_hdr->lrh_type, LLOG_HDR_MAGIC);
+ rc = -EIO;
+ } else if (llh_hdr->lrh_len != LLOG_CHUNK_SIZE) {
+ CERROR("incorrectly sized log %.*s header: %#x "
+ "(expected %#x)\n",
+ handle->lgh_file->f_dentry->d_name.len,
+ handle->lgh_file->f_dentry->d_name.name,
+ llh_hdr->lrh_len, LLOG_CHUNK_SIZE);
+ CERROR("you may need to re-run lconf --write_conf.\n");
+ rc = -EIO;
+ }
+ }
+
+ handle->lgh_last_idx = handle->lgh_hdr->llh_tail.lrt_index;
+ handle->lgh_file->f_pos = i_size_read(handle->lgh_file->f_dentry->d_inode);
+
+ RETURN(rc);
+}
+
+/* returns negative in on error; 0 if success && reccookie == 0; 1 otherwise */
+/* appends if idx == -1, otherwise overwrites record idx. */
+static int llog_lvfs_write_rec(const struct lu_env *env,
+ struct llog_handle *loghandle,
+ struct llog_rec_hdr *rec,
+ struct llog_cookie *reccookie, int cookiecount,
+ void *buf, int idx, struct thandle *th)
+{
+ struct llog_log_hdr *llh;
+ int reclen = rec->lrh_len, index, rc;
+ struct llog_rec_tail *lrt;
+ struct obd_device *obd;
+ struct file *file;
+ size_t left;
+ ENTRY;
+
+ llh = loghandle->lgh_hdr;
+ file = loghandle->lgh_file;
+ obd = loghandle->lgh_ctxt->loc_exp->exp_obd;
+
+ /* record length should not bigger than LLOG_CHUNK_SIZE */
+ if (buf)
+ rc = (reclen > LLOG_CHUNK_SIZE - sizeof(struct llog_rec_hdr) -
+ sizeof(struct llog_rec_tail)) ? -E2BIG : 0;
+ else
+ rc = (reclen > LLOG_CHUNK_SIZE) ? -E2BIG : 0;
+ if (rc)
+ RETURN(rc);
+
+ if (buf)
+ /* write_blob adds header and tail to lrh_len. */
+ reclen = sizeof(*rec) + rec->lrh_len +
+ sizeof(struct llog_rec_tail);
+
+ if (idx != -1) {
+ loff_t saved_offset;
+
+ /* no header: only allowed to insert record 1 */
+ if (idx != 1 && !i_size_read(file->f_dentry->d_inode)) {
+ CERROR("idx != -1 in empty log\n");
+ LBUG();
+ }
+
+ if (idx && llh->llh_size && llh->llh_size != rec->lrh_len)
+ RETURN(-EINVAL);
+
+ if (!ext2_test_bit(idx, llh->llh_bitmap))
+ CERROR("Modify unset record %u\n", idx);
+ if (idx != rec->lrh_index)
+ CERROR("Index mismatch %d %u\n", idx, rec->lrh_index);
+
+ rc = llog_lvfs_write_blob(obd, file, &llh->llh_hdr, NULL, 0);
+ /* we are done if we only write the header or on error */
+ if (rc || idx == 0)
+ RETURN(rc);
+
+ if (buf) {
+ /* We assume that caller has set lgh_cur_* */
+ saved_offset = loghandle->lgh_cur_offset;
+ CDEBUG(D_OTHER,
+ "modify record "DOSTID": idx:%d/%u/%d, len:%u "
+ "offset %llu\n",
+ POSTID(&loghandle->lgh_id.lgl_oi), idx, rec->lrh_index,
+ loghandle->lgh_cur_idx, rec->lrh_len,
+ (long long)(saved_offset - sizeof(*llh)));
+ if (rec->lrh_index != loghandle->lgh_cur_idx) {
+ CERROR("modify idx mismatch %u/%d\n",
+ idx, loghandle->lgh_cur_idx);
+ RETURN(-EFAULT);
+ }
+ } else {
+ /* Assumes constant lrh_len */
+ saved_offset = sizeof(*llh) + (idx - 1) * reclen;
+ }
+
+ rc = llog_lvfs_write_blob(obd, file, rec, buf, saved_offset);
+ if (rc == 0 && reccookie) {
+ reccookie->lgc_lgl = loghandle->lgh_id;
+ reccookie->lgc_index = idx;
+ rc = 1;
+ }
+ RETURN(rc);
+ }
+
+ /* Make sure that records don't cross a chunk boundary, so we can
+ * process them page-at-a-time if needed. If it will cross a chunk
+ * boundary, write in a fake (but referenced) entry to pad the chunk.
+ *
+ * We know that llog_current_log() will return a loghandle that is
+ * big enough to hold reclen, so all we care about is padding here.
+ */
+ left = LLOG_CHUNK_SIZE - (file->f_pos & (LLOG_CHUNK_SIZE - 1));
+
+ /* NOTE: padding is a record, but no bit is set */
+ if (left != 0 && left != reclen &&
+ left < (reclen + LLOG_MIN_REC_SIZE)) {
+ index = loghandle->lgh_last_idx + 1;
+ rc = llog_lvfs_pad(obd, file, left, index);
+ if (rc)
+ RETURN(rc);
+ loghandle->lgh_last_idx++; /*for pad rec*/
+ }
+ /* if it's the last idx in log file, then return -ENOSPC */
+ if (loghandle->lgh_last_idx >= LLOG_BITMAP_SIZE(llh) - 1)
+ RETURN(-ENOSPC);
+ loghandle->lgh_last_idx++;
+ index = loghandle->lgh_last_idx;
+ LASSERT(index < LLOG_BITMAP_SIZE(llh));
+ rec->lrh_index = index;
+ if (buf == NULL) {
+ lrt = (struct llog_rec_tail *)
+ ((char *)rec + rec->lrh_len - sizeof(*lrt));
+ lrt->lrt_len = rec->lrh_len;
+ lrt->lrt_index = rec->lrh_index;
+ }
+ /*The caller should make sure only 1 process access the lgh_last_idx,
+ *Otherwise it might hit the assert.*/
+ LASSERT(index < LLOG_BITMAP_SIZE(llh));
+ spin_lock(&loghandle->lgh_hdr_lock);
+ if (ext2_set_bit(index, llh->llh_bitmap)) {
+ CERROR("argh, index %u already set in log bitmap?\n", index);
+ spin_unlock(&loghandle->lgh_hdr_lock);
+ LBUG(); /* should never happen */
+ }
+ llh->llh_count++;
+ spin_unlock(&loghandle->lgh_hdr_lock);
+ llh->llh_tail.lrt_index = index;
+
+ rc = llog_lvfs_write_blob(obd, file, &llh->llh_hdr, NULL, 0);
+ if (rc)
+ RETURN(rc);
+
+ rc = llog_lvfs_write_blob(obd, file, rec, buf, file->f_pos);
+ if (rc)
+ RETURN(rc);
+
+ CDEBUG(D_RPCTRACE, "added record "DOSTID": idx: %u, %u \n",
+ POSTID(&loghandle->lgh_id.lgl_oi), index, rec->lrh_len);
+ if (rc == 0 && reccookie) {
+ reccookie->lgc_lgl = loghandle->lgh_id;
+ reccookie->lgc_index = index;
+ if ((rec->lrh_type == MDS_UNLINK_REC) ||
+ (rec->lrh_type == MDS_SETATTR64_REC))
+ reccookie->lgc_subsys = LLOG_MDS_OST_ORIG_CTXT;
+ else if (rec->lrh_type == OST_SZ_REC)
+ reccookie->lgc_subsys = LLOG_SIZE_ORIG_CTXT;
+ else
+ reccookie->lgc_subsys = -1;
+ rc = 1;
+ }
+ if (rc == 0 && rec->lrh_type == LLOG_GEN_REC)
+ rc = 1;
+
+ RETURN(rc);
+}
+
+/* We can skip reading at least as many log blocks as the number of
+* minimum sized log records we are skipping. If it turns out
+* that we are not far enough along the log (because the
+* actual records are larger than minimum size) we just skip
+* some more records. */
+
+static void llog_skip_over(__u64 *off, int curr, int goal)
+{
+ if (goal <= curr)
+ return;
+ *off = (*off + (goal-curr-1) * LLOG_MIN_REC_SIZE) &
+ ~(LLOG_CHUNK_SIZE - 1);
+}
+
+
+/* sets:
+ * - cur_offset to the furthest point read in the log file
+ * - cur_idx to the log index preceeding cur_offset
+ * returns -EIO/-EINVAL on error
+ */
+static int llog_lvfs_next_block(const struct lu_env *env,
+ struct llog_handle *loghandle, int *cur_idx,
+ int next_idx, __u64 *cur_offset, void *buf,
+ int len)
+{
+ int rc;
+ ENTRY;
+
+ if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
+ RETURN(-EINVAL);
+
+ CDEBUG(D_OTHER, "looking for log index %u (cur idx %u off "LPU64")\n",
+ next_idx, *cur_idx, *cur_offset);
+
+ while (*cur_offset < i_size_read(loghandle->lgh_file->f_dentry->d_inode)) {
+ struct llog_rec_hdr *rec, *last_rec;
+ struct llog_rec_tail *tail;
+ loff_t ppos;
+ int llen;
+
+ llog_skip_over(cur_offset, *cur_idx, next_idx);
+
+ /* read up to next LLOG_CHUNK_SIZE block */
+ ppos = *cur_offset;
+ llen = LLOG_CHUNK_SIZE - (*cur_offset & (LLOG_CHUNK_SIZE - 1));
+ rc = fsfilt_read_record(loghandle->lgh_ctxt->loc_exp->exp_obd,
+ loghandle->lgh_file, buf, llen,
+ cur_offset);
+ if (rc < 0) {
+ CERROR("Cant read llog block at log id "DOSTID
+ "/%u offset "LPU64"\n",
+ POSTID(&loghandle->lgh_id.lgl_oi),
+ loghandle->lgh_id.lgl_ogen,
+ *cur_offset);
+ RETURN(rc);
+ }
+
+ /* put number of bytes read into rc to make code simpler */
+ rc = *cur_offset - ppos;
+ if (rc < len) {
+ /* signal the end of the valid buffer to llog_process */
+ memset(buf + rc, 0, len - rc);
+ }
+
+ if (rc == 0) /* end of file, nothing to do */
+ RETURN(0);
+
+ if (rc < sizeof(*tail)) {
+ CERROR("Invalid llog block at log id "DOSTID"/%u offset"
+ LPU64"\n", POSTID(&loghandle->lgh_id.lgl_oi),
+ loghandle->lgh_id.lgl_ogen, *cur_offset);
+ RETURN(-EINVAL);
+ }
+
+ rec = buf;
+ if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
+ lustre_swab_llog_rec(rec);
+
+ tail = (struct llog_rec_tail *)(buf + rc -
+ sizeof(struct llog_rec_tail));
+
+ /* get the last record in block */
+ last_rec = (struct llog_rec_hdr *)(buf + rc -
+ le32_to_cpu(tail->lrt_len));
+
+ if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
+ lustre_swab_llog_rec(last_rec);
+ LASSERT(last_rec->lrh_index == tail->lrt_index);
+
+ *cur_idx = tail->lrt_index;
+
+ /* this shouldn't happen */
+ if (tail->lrt_index == 0) {
+ CERROR("Invalid llog tail at log id "DOSTID"/%u offset "
+ LPU64"\n", POSTID(&loghandle->lgh_id.lgl_oi),
+ loghandle->lgh_id.lgl_ogen, *cur_offset);
+ RETURN(-EINVAL);
+ }
+ if (tail->lrt_index < next_idx)
+ continue;
+
+ /* sanity check that the start of the new buffer is no farther
+ * than the record that we wanted. This shouldn't happen. */
+ if (rec->lrh_index > next_idx) {
+ CERROR("missed desired record? %u > %u\n",
+ rec->lrh_index, next_idx);
+ RETURN(-ENOENT);
+ }
+ RETURN(0);
+ }
+ RETURN(-EIO);
+}
+
+static int llog_lvfs_prev_block(const struct lu_env *env,
+ struct llog_handle *loghandle,
+ int prev_idx, void *buf, int len)
+{
+ __u64 cur_offset;
+ int rc;
+ ENTRY;
+
+ if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
+ RETURN(-EINVAL);
+
+ CDEBUG(D_OTHER, "looking for log index %u\n", prev_idx);
+
+ cur_offset = LLOG_CHUNK_SIZE;
+ llog_skip_over(&cur_offset, 0, prev_idx);
+
+ while (cur_offset < i_size_read(loghandle->lgh_file->f_dentry->d_inode)) {
+ struct llog_rec_hdr *rec, *last_rec;
+ struct llog_rec_tail *tail;
+ loff_t ppos = cur_offset;
+
+ rc = fsfilt_read_record(loghandle->lgh_ctxt->loc_exp->exp_obd,
+ loghandle->lgh_file, buf, len,
+ &cur_offset);
+ if (rc < 0) {
+ CERROR("Cant read llog block at log id "DOSTID
+ "/%u offset "LPU64"\n",
+ POSTID(&loghandle->lgh_id.lgl_oi),
+ loghandle->lgh_id.lgl_ogen,
+ cur_offset);
+ RETURN(rc);
+ }
+
+ /* put number of bytes read into rc to make code simpler */
+ rc = cur_offset - ppos;
+
+ if (rc == 0) /* end of file, nothing to do */
+ RETURN(0);
+
+ if (rc < sizeof(*tail)) {
+ CERROR("Invalid llog block at log id "DOSTID"/%u offset"
+ LPU64"\n", POSTID(&loghandle->lgh_id.lgl_oi),
+ loghandle->lgh_id.lgl_ogen, cur_offset);
+ RETURN(-EINVAL);
+ }
+
+ rec = buf;
+ if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
+ lustre_swab_llog_rec(rec);
+
+ tail = (struct llog_rec_tail *)(buf + rc -
+ sizeof(struct llog_rec_tail));
+
+ /* get the last record in block */
+ last_rec = (struct llog_rec_hdr *)(buf + rc -
+ le32_to_cpu(tail->lrt_len));
+
+ if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
+ lustre_swab_llog_rec(last_rec);
+ LASSERT(last_rec->lrh_index == tail->lrt_index);
+
+ /* this shouldn't happen */
+ if (tail->lrt_index == 0) {
+ CERROR("Invalid llog tail at log id "DOSTID"/%u offset"
+ LPU64"\n", POSTID(&loghandle->lgh_id.lgl_oi),
+ loghandle->lgh_id.lgl_ogen, cur_offset);
+ RETURN(-EINVAL);
+ }
+ if (tail->lrt_index < prev_idx)
+ continue;
+
+ /* sanity check that the start of the new buffer is no farther
+ * than the record that we wanted. This shouldn't happen. */
+ if (rec->lrh_index > prev_idx) {
+ CERROR("missed desired record? %u > %u\n",
+ rec->lrh_index, prev_idx);
+ RETURN(-ENOENT);
+ }
+ RETURN(0);
+ }
+ RETURN(-EIO);
+}
+
+static struct file *llog_filp_open(char *dir, char *name, int flags, int mode)
+{
+ char *logname;
+ struct file *filp;
+ int len;
+
+ OBD_ALLOC(logname, PATH_MAX);
+ if (logname == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ len = snprintf(logname, PATH_MAX, "%s/%s", dir, name);
+ if (len >= PATH_MAX - 1) {
+ filp = ERR_PTR(-ENAMETOOLONG);
+ } else {
+ filp = l_filp_open(logname, flags, mode);
+ if (IS_ERR(filp) && PTR_ERR(filp) != -ENOENT)
+ CERROR("logfile creation %s: %ld\n", logname,
+ PTR_ERR(filp));
+ }
+ OBD_FREE(logname, PATH_MAX);
+ return filp;
+}
+
+static int llog_lvfs_open(const struct lu_env *env, struct llog_handle *handle,
+ struct llog_logid *logid, char *name,
+ enum llog_open_param open_param)
+{
+ struct llog_ctxt *ctxt = handle->lgh_ctxt;
+ struct l_dentry *dchild = NULL;
+ struct obd_device *obd;
+ int rc = 0;
+
+ ENTRY;
+
+ LASSERT(ctxt);
+ LASSERT(ctxt->loc_exp);
+ LASSERT(ctxt->loc_exp->exp_obd);
+ obd = ctxt->loc_exp->exp_obd;
+
+ LASSERT(handle);
+ if (logid != NULL) {
+ dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, &logid->lgl_oi,
+ logid->lgl_ogen);
+ if (IS_ERR(dchild)) {
+ rc = PTR_ERR(dchild);
+ CERROR("%s: error looking up logfile #"DOSTID "#%08x:"
+ " rc = %d\n", ctxt->loc_obd->obd_name,
+ POSTID(&logid->lgl_oi), logid->lgl_ogen, rc);
+ GOTO(out, rc);
+ }
+ if (dchild->d_inode == NULL) {
+ l_dput(dchild);
+ rc = -ENOENT;
+ CERROR("%s: nonexistent llog #"DOSTID"#%08x:"
+ "rc = %d\n", ctxt->loc_obd->obd_name,
+ POSTID(&logid->lgl_oi), logid->lgl_ogen, rc);
+ GOTO(out, rc);
+ }
+ handle->lgh_file = l_dentry_open(&obd->obd_lvfs_ctxt, dchild,
+ O_RDWR | O_LARGEFILE);
+ l_dput(dchild);
+ if (IS_ERR(handle->lgh_file)) {
+ rc = PTR_ERR(handle->lgh_file);
+ handle->lgh_file = NULL;
+ CERROR("%s: error opening llog #"DOSTID"#%08x:"
+ "rc = %d\n", ctxt->loc_obd->obd_name,
+ POSTID(&logid->lgl_oi), logid->lgl_ogen, rc);
+ GOTO(out, rc);
+ }
+ handle->lgh_id = *logid;
+ } else if (name) {
+ handle->lgh_file = llog_filp_open(MOUNT_CONFIGS_DIR, name,
+ O_RDWR | O_LARGEFILE, 0644);
+ if (IS_ERR(handle->lgh_file)) {
+ rc = PTR_ERR(handle->lgh_file);
+ handle->lgh_file = NULL;
+ if (rc == -ENOENT && open_param == LLOG_OPEN_NEW) {
+ OBD_ALLOC(handle->lgh_name, strlen(name) + 1);
+ if (handle->lgh_name)
+ strcpy(handle->lgh_name, name);
+ else
+ GOTO(out, rc = -ENOMEM);
+ rc = 0;
+ } else {
+ GOTO(out, rc);
+ }
+ } else {
+ lustre_build_llog_lvfs_oid(&handle->lgh_id,
+ handle->lgh_file->f_dentry->d_inode->i_ino,
+ handle->lgh_file->f_dentry->d_inode->i_generation);
+ }
+ } else {
+ LASSERTF(open_param == LLOG_OPEN_NEW, "%#x\n", open_param);
+ handle->lgh_file = NULL;
+ }
+
+ /* No new llog is expected but doesn't exist */
+ if (open_param != LLOG_OPEN_NEW && handle->lgh_file == NULL)
+ GOTO(out_name, rc = -ENOENT);
+
+ RETURN(0);
+out_name:
+ if (handle->lgh_name != NULL)
+ OBD_FREE(handle->lgh_name, strlen(name) + 1);
+out:
+ RETURN(rc);
+}
+
+static int llog_lvfs_exist(struct llog_handle *handle)
+{
+ return (handle->lgh_file != NULL);
+}
+
+/* This is a callback from the llog_* functions.
+ * Assumes caller has already pushed us into the kernel context. */
+static int llog_lvfs_create(const struct lu_env *env,
+ struct llog_handle *handle,
+ struct thandle *th)
+{
+ struct llog_ctxt *ctxt = handle->lgh_ctxt;
+ struct obd_device *obd;
+ struct l_dentry *dchild = NULL;
+ struct file *file;
+ struct obdo *oa = NULL;
+ int rc = 0;
+ int open_flags = O_RDWR | O_CREAT | O_LARGEFILE;
+
+ ENTRY;
+
+ LASSERT(ctxt);
+ LASSERT(ctxt->loc_exp);
+ obd = ctxt->loc_exp->exp_obd;
+ LASSERT(handle->lgh_file == NULL);
+
+ if (handle->lgh_name) {
+ file = llog_filp_open(MOUNT_CONFIGS_DIR, handle->lgh_name,
+ open_flags, 0644);
+ if (IS_ERR(file))
+ RETURN(PTR_ERR(file));
+
+ lustre_build_llog_lvfs_oid(&handle->lgh_id,
+ file->f_dentry->d_inode->i_ino,
+ file->f_dentry->d_inode->i_generation);
+ handle->lgh_file = file;
+ } else {
+ OBDO_ALLOC(oa);
+ if (oa == NULL)
+ RETURN(-ENOMEM);
+
+ ostid_set_seq_llog(&oa->o_oi);
+ oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLGROUP;
+
+ rc = obd_create(NULL, ctxt->loc_exp, oa, NULL, NULL);
+ if (rc)
+ GOTO(out, rc);
+
+ /* FIXME: rationalize the misuse of o_generation in
+ * this API along with mds_obd_{create,destroy}.
+ * Hopefully it is only an internal API issue. */
+#define o_generation o_parent_oid
+ dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, &oa->o_oi,
+ oa->o_generation);
+ if (IS_ERR(dchild))
+ GOTO(out, rc = PTR_ERR(dchild));
+
+ file = l_dentry_open(&obd->obd_lvfs_ctxt, dchild, open_flags);
+ l_dput(dchild);
+ if (IS_ERR(file))
+ GOTO(out, rc = PTR_ERR(file));
+ handle->lgh_id.lgl_oi = oa->o_oi;
+ handle->lgh_id.lgl_ogen = oa->o_generation;
+ handle->lgh_file = file;
+out:
+ OBDO_FREE(oa);
+ }
+ RETURN(rc);
+}
+
+static int llog_lvfs_close(const struct lu_env *env,
+ struct llog_handle *handle)
+{
+ int rc;
+
+ ENTRY;
+
+ if (handle->lgh_file == NULL)
+ RETURN(0);
+ rc = filp_close(handle->lgh_file, 0);
+ if (rc)
+ CERROR("%s: error closing llog #"DOSTID"#%08x: "
+ "rc = %d\n", handle->lgh_ctxt->loc_obd->obd_name,
+ POSTID(&handle->lgh_id.lgl_oi),
+ handle->lgh_id.lgl_ogen, rc);
+ handle->lgh_file = NULL;
+ if (handle->lgh_name) {
+ OBD_FREE(handle->lgh_name, strlen(handle->lgh_name) + 1);
+ handle->lgh_name = NULL;
+ }
+ RETURN(rc);
+}
+
+static int llog_lvfs_destroy(const struct lu_env *env,
+ struct llog_handle *handle)
+{
+ struct dentry *fdentry;
+ struct obdo *oa;
+ struct obd_device *obd = handle->lgh_ctxt->loc_exp->exp_obd;
+ char *dir;
+ void *th;
+ struct inode *inode;
+ int rc, rc1;
+ ENTRY;
+
+ dir = MOUNT_CONFIGS_DIR;
+
+ LASSERT(handle->lgh_file);
+ fdentry = handle->lgh_file->f_dentry;
+ inode = fdentry->d_parent->d_inode;
+ if (strcmp(fdentry->d_parent->d_name.name, dir) == 0) {
+ struct lvfs_run_ctxt saved;
+ struct vfsmount *mnt = mntget(handle->lgh_file->f_vfsmnt);
+
+ push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+ dget(fdentry);
+ rc = llog_lvfs_close(env, handle);
+ if (rc == 0) {
+ mutex_lock_nested(&inode->i_mutex, I_MUTEX_PARENT);
+ rc = ll_vfs_unlink(inode, fdentry, mnt);
+ mutex_unlock(&inode->i_mutex);
+ }
+ mntput(mnt);
+
+ dput(fdentry);
+ pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+ RETURN(rc);
+ }
+
+ OBDO_ALLOC(oa);
+ if (oa == NULL)
+ RETURN(-ENOMEM);
+
+ oa->o_oi = handle->lgh_id.lgl_oi;
+ oa->o_generation = handle->lgh_id.lgl_ogen;
+#undef o_generation
+ oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLGENER;
+
+ rc = llog_lvfs_close(env, handle);
+ if (rc)
+ GOTO(out, rc);
+
+ th = fsfilt_start_log(obd, inode, FSFILT_OP_UNLINK, NULL, 1);
+ if (IS_ERR(th)) {
+ CERROR("fsfilt_start failed: %ld\n", PTR_ERR(th));
+ GOTO(out, rc = PTR_ERR(th));
+ }
+
+ rc = obd_destroy(NULL, handle->lgh_ctxt->loc_exp, oa,
+ NULL, NULL, NULL, NULL);
+
+ rc1 = fsfilt_commit(obd, inode, th, 0);
+ if (rc == 0 && rc1 != 0)
+ rc = rc1;
+ out:
+ OBDO_FREE(oa);
+ RETURN(rc);
+}
+
+static int llog_lvfs_declare_create(const struct lu_env *env,
+ struct llog_handle *res,
+ struct thandle *th)
+{
+ return 0;
+}
+
+static int llog_lvfs_declare_write_rec(const struct lu_env *env,
+ struct llog_handle *loghandle,
+ struct llog_rec_hdr *rec,
+ int idx, struct thandle *th)
+{
+ return 0;
+}
+
+struct llog_operations llog_lvfs_ops = {
+ .lop_write_rec = llog_lvfs_write_rec,
+ .lop_next_block = llog_lvfs_next_block,
+ .lop_prev_block = llog_lvfs_prev_block,
+ .lop_read_header = llog_lvfs_read_header,
+ .lop_create = llog_lvfs_create,
+ .lop_destroy = llog_lvfs_destroy,
+ .lop_close = llog_lvfs_close,
+ .lop_open = llog_lvfs_open,
+ .lop_exist = llog_lvfs_exist,
+ .lop_declare_create = llog_lvfs_declare_create,
+ .lop_declare_write_rec = llog_lvfs_declare_write_rec,
+};
+EXPORT_SYMBOL(llog_lvfs_ops);
+#else /* !__KERNEL__ */
+struct llog_operations llog_lvfs_ops = {};
+#endif
git://git.whamcloud.com / fs / lustre-release.git / commitdiff