+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * lustre/lib/fsfilt_ext3.c
- * Lustre filesystem abstraction routines
- *
- * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
- * Author: Andreas Dilger <adilger@clusterfs.com>
- *
- * This file is part of Lustre, http://www.lustre.org.
- *
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * Lustre 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 for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#define DEBUG_SUBSYSTEM S_FILTER
-
-#include <linux/fs.h>
-#include <linux/jbd.h>
-#include <linux/slab.h>
-#include <linux/pagemap.h>
-#include <linux/quotaops.h>
-#include <linux/ext3_fs.h>
-#include <linux/ext3_jbd.h>
-#include <linux/version.h>
-/* XXX ugh */
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
- #include <linux/ext3_xattr.h>
-#else
- #include <linux/../../fs/ext3/xattr.h>
-#endif
-#include <linux/kp30.h>
-#include <linux/lustre_fsfilt.h>
-#include <linux/obd.h>
-#include <linux/obd_class.h>
-#include <linux/module.h>
-
-static kmem_cache_t *fcb_cache;
-static atomic_t fcb_cache_count = ATOMIC_INIT(0);
-
-struct fsfilt_cb_data {
- struct journal_callback cb_jcb; /* jbd 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 */
-};
-
-#define EXT3_XATTR_INDEX_LUSTRE 5
-#define XATTR_LUSTRE_MDS_OBJID "system.lustre_mds_objid"
-
-/*
- * 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)
-{
- /* For updates to the last recieved file */
- int nblocks = EXT3_DATA_TRANS_BLOCKS;
- void *handle;
-
- LASSERT(current->journal_info == NULL);
-
- switch(op) {
- case FSFILT_OP_CREATE_LOG:
- nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS+EXT3_DATA_TRANS_BLOCKS;
- op = FSFILT_OP_CREATE;
- break;
- case FSFILT_OP_UNLINK_LOG:
- nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS+EXT3_DATA_TRANS_BLOCKS;
- op = FSFILT_OP_UNLINK;
- break;
- }
-
- switch(op) {
- case FSFILT_OP_RMDIR:
- case FSFILT_OP_UNLINK:
- nblocks += EXT3_DELETE_TRANS_BLOCKS;
- break;
- case FSFILT_OP_RENAME:
- /* modify additional directory */
- nblocks += EXT3_DATA_TRANS_BLOCKS;
- /* no break */
- case FSFILT_OP_SYMLINK:
- /* additional block + block bitmap + GDT for long symlink */
- nblocks += 3;
- /* no break */
- case FSFILT_OP_CREATE:
- case FSFILT_OP_MKDIR:
- case FSFILT_OP_MKNOD:
- /* modify one inode + block bitmap + GDT */
- nblocks += 3;
- /* no break */
- case FSFILT_OP_LINK:
- /* modify parent directory */
- nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS+EXT3_DATA_TRANS_BLOCKS;
- break;
- case FSFILT_OP_SETATTR:
- /* Setattr on inode */
- nblocks += 1;
- break;
- default: CERROR("unknown transaction start op %d\n", op);
- LBUG();
- }
-
- LASSERT(current->journal_info == desc_private);
- lock_kernel();
- handle = journal_start(EXT3_JOURNAL(inode), nblocks);
- unlock_kernel();
-
- if (!IS_ERR(handle))
- LASSERT(current->journal_info == handle);
- return handle;
-}
-
-/*
- * Calculate the number of buffer credits needed to write multiple pages in
- * a single ext3 transaction. No, this shouldn't be here, but as yet ext3
- * doesn't have a nice API for calculating this sort of thing in advance.
- *
- * See comment above ext3_writepage_trans_blocks for details. We assume
- * no data journaling is being done, but it does allow for all of the pages
- * being non-contiguous. If we are guaranteed contiguous pages we could
- * reduce the number of (d)indirect blocks a lot.
- *
- * With N blocks per page and P pages, for each inode we have at most:
- * N*P indirect
- * min(N*P, blocksize/4 + 1) dindirect blocks
- * niocount tindirect
- *
- * For the entire filesystem, we have at most:
- * min(sum(nindir + P), ngroups) bitmap blocks (from the above)
- * min(sum(nindir + P), gdblocks) group descriptor blocks (from the above)
- * objcount inode blocks
- * 1 superblock
- * 2 * EXT3_SINGLEDATA_TRANS_BLOCKS for the quota files
- *
- * 1 EXT3_DATA_TRANS_BLOCKS for the last_rcvd update.
- */
-static int fsfilt_ext3_credits_needed(int objcount, struct fsfilt_objinfo *fso)
-{
- struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
- int blockpp = 1 << (PAGE_CACHE_SHIFT - sb->s_blocksize_bits);
- int addrpp = EXT3_ADDR_PER_BLOCK(sb) * blockpp;
- int nbitmaps = 0;
- int ngdblocks = 0;
- int needed = objcount + 1;
- int i;
-
- for (i = 0; i < objcount; i++, fso++) {
- int nblocks = fso->fso_bufcnt * blockpp;
- int ndindirect = min(nblocks, addrpp + 1);
- int nindir = nblocks + ndindirect + 1;
-
- nbitmaps += nindir + nblocks;
- ngdblocks += nindir + nblocks;
-
- needed += nindir;
- }
-
- /* Assumes ext3 and ext3 have same sb_info layout at the start. */
- if (nbitmaps > EXT3_SB(sb)->s_groups_count)
- nbitmaps = EXT3_SB(sb)->s_groups_count;
- if (ngdblocks > EXT3_SB(sb)->s_gdb_count)
- ngdblocks = EXT3_SB(sb)->s_gdb_count;
-
- needed += nbitmaps + ngdblocks;
-
- /* last_rcvd update */
- needed += EXT3_DATA_TRANS_BLOCKS;
-
-#ifdef CONFIG_QUOTA
- /* We assume that there will be 1 bit set in s_dquot.flags for each
- * quota file that is active. This is at least true for now.
- */
- needed += hweight32(sb_any_quota_enabled(sb)) *
- EXT3_SINGLEDATA_TRANS_BLOCKS;
-#endif
-
- return needed;
-}
-
-/* We have to start a huge journal transaction here to hold all of the
- * metadata for the pages being written here. This is necessitated by
- * the fact that we do lots of prepare_write operations before we do
- * any of the matching commit_write operations, so even if we split
- * up to use "smaller" transactions none of them could complete until
- * all of them were opened. By having a single journal transaction,
- * we eliminate duplicate reservations for common blocks like the
- * superblock and group descriptors or bitmaps.
- *
- * We will start the transaction here, but each prepare_write will
- * add a refcount to the transaction, and each commit_write will
- * remove a refcount. The transaction will be closed when all of
- * the pages have been written.
- */
-static void *fsfilt_ext3_brw_start(int objcount, struct fsfilt_objinfo *fso,
- int niocount, void *desc_private)
-{
- journal_t *journal;
- handle_t *handle;
- int needed;
- ENTRY;
-
- LASSERT(current->journal_info == desc_private);
- journal = EXT3_SB(fso->fso_dentry->d_inode->i_sb)->s_journal;
- needed = fsfilt_ext3_credits_needed(objcount, fso);
-
- /* The number of blocks we could _possibly_ dirty can very large.
- * We reduce our request if it is absurd (and we couldn't get that
- * many credits for a single handle anyways).
- *
- * At some point we have to limit the size of I/Os sent at one time,
- * increase the size of the journal, or we have to calculate the
- * actual journal requirements more carefully by checking all of
- * the blocks instead of being maximally pessimistic. It remains to
- * be seen if this is a real problem or not.
- */
- if (needed > journal->j_max_transaction_buffers) {
- CERROR("want too many journal credits (%d) using %d instead\n",
- needed, journal->j_max_transaction_buffers);
- needed = journal->j_max_transaction_buffers;
- }
-
- lock_kernel();
- handle = journal_start(journal, needed);
- unlock_kernel();
- if (IS_ERR(handle)) {
- CERROR("can't get handle for %d credits: rc = %ld\n", needed,
- PTR_ERR(handle));
- } else {
- LASSERT(handle->h_buffer_credits >= needed);
- LASSERT(current->journal_info == 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 */
-
- lock_kernel();
- rc = journal_stop(handle);
- unlock_kernel();
-
- LASSERT(current->journal_info == NULL);
- return rc;
-}
-
-static int fsfilt_ext3_setattr(struct dentry *dentry, void *handle,
- struct iattr *iattr, int do_trunc)
-{
- struct inode *inode = dentry->d_inode;
- int rc;
-
- lock_kernel();
-
- /* A _really_ horrible hack to avoid removing the data stored
- * in the block pointers; this is really the "small" stripe MD data.
- * We can avoid further hackery by virtue of the MDS file size being
- * zero all the time (which doesn't invoke block truncate at unlink
- * time), so we assert we never change the MDS file size from zero. */
- if (iattr->ia_valid & ATTR_SIZE && !do_trunc) {
- /* ATTR_SIZE would invoke truncate: clear it */
- iattr->ia_valid &= ~ATTR_SIZE;
- EXT3_I(inode)->i_disksize = inode->i_size = iattr->ia_size;
-
- /* make sure _something_ gets set - so new inode
- * goes to disk (probably won't work over XFS */
- if (!(iattr->ia_valid & (ATTR_MODE | ATTR_MTIME | ATTR_CTIME))){
- iattr->ia_valid |= ATTR_MODE;
- iattr->ia_mode = inode->i_mode;
- }
- }
-
- /* Don't allow setattr to change file type */
- iattr->ia_mode = (inode->i_mode & S_IFMT)|(iattr->ia_mode & ~S_IFMT);
-
- if (inode->i_op->setattr) {
- rc = inode->i_op->setattr(dentry, iattr);
- } else {
- rc = inode_change_ok(inode, iattr);
- if (!rc)
- rc = inode_setattr(inode, iattr);
- }
-
- unlock_kernel();
-
- return rc;
-}
-
-static int fsfilt_ext3_set_md(struct inode *inode, void *handle,
- void *lmm, int lmm_size)
-{
- int rc;
-
- /* Nasty hack city - store stripe MD data in the block pointers if
- * it will fit, because putting it in an EA currently kills the MDS
- * performance. We'll fix this with "fast EAs" in the future.
- */
- if (inode->i_blocks == 0 && lmm_size <= sizeof(EXT3_I(inode)->i_data) -
- sizeof(EXT3_I(inode)->i_data[0])) {
- /* XXX old_size is debugging only */
- int old_size = EXT3_I(inode)->i_data[0];
- if (old_size != 0) {
- LASSERT(old_size < sizeof(EXT3_I(inode)->i_data));
- CERROR("setting EA on %lu again... interesting\n",
- inode->i_ino);
- }
-
- EXT3_I(inode)->i_data[0] = cpu_to_le32(lmm_size);
- memcpy(&EXT3_I(inode)->i_data[1], lmm, lmm_size);
- mark_inode_dirty(inode);
- return 0;
- } else {
- down(&inode->i_sem);
- lock_kernel();
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
- rc = ext3_xattr_set(handle, inode, EXT3_XATTR_INDEX_LUSTRE,
- XATTR_LUSTRE_MDS_OBJID, lmm, lmm_size, 0);
-#else
- rc = ext3_xattr_set_handle(handle, inode,
- EXT3_XATTR_INDEX_LUSTRE,
- XATTR_LUSTRE_MDS_OBJID, lmm,
- lmm_size, 0);
-#endif
- unlock_kernel();
- up(&inode->i_sem);
- }
-
- if (rc)
- CERROR("error adding MD data to inode %lu: rc = %d\n",
- inode->i_ino, rc);
- return rc;
-}
-
-static int fsfilt_ext3_get_md(struct inode *inode, void *lmm, int lmm_size)
-{
- int rc;
-
- if (inode->i_blocks == 0 && EXT3_I(inode)->i_data[0]) {
- int size = le32_to_cpu(EXT3_I(inode)->i_data[0]);
- LASSERT(size < sizeof(EXT3_I(inode)->i_data));
- if (lmm) {
- if (size > lmm_size)
- return -ERANGE;
- memcpy(lmm, &EXT3_I(inode)->i_data[1], size);
- }
- return size;
- }
-
- down(&inode->i_sem);
- lock_kernel();
- rc = ext3_xattr_get(inode, EXT3_XATTR_INDEX_LUSTRE,
- XATTR_LUSTRE_MDS_OBJID, lmm, lmm_size);
- unlock_kernel();
- up(&inode->i_sem);
-
- /* This gives us the MD size */
- if (lmm == NULL)
- return (rc == -ENODATA) ? 0 : rc;
-
- if (rc < 0) {
- CDEBUG(D_INFO, "error getting EA %s from inode %lu: "
- "rc = %d\n", XATTR_LUSTRE_MDS_OBJID, inode->i_ino, rc);
- memset(lmm, 0, lmm_size);
- return (rc == -ENODATA) ? 0 : rc;
- }
-
- return rc;
-}
-
-static ssize_t fsfilt_ext3_readpage(struct file *file, char *buf, size_t count,
- loff_t *off)
-{
- struct inode *inode = file->f_dentry->d_inode;
- int rc = 0;
-
- if (S_ISREG(inode->i_mode))
- rc = file->f_op->read(file, buf, count, off);
- else {
- const int blkbits = inode->i_sb->s_blocksize_bits;
- const int blksize = inode->i_sb->s_blocksize;
-
- CDEBUG(D_EXT2, "reading "LPSZ" at dir %lu+%llu\n",
- count, inode->i_ino, *off);
- while (count > 0) {
- struct buffer_head *bh;
-
- bh = NULL;
- if (*off < inode->i_size) {
- int err = 0;
-
- bh = ext3_bread(NULL, inode, *off >> blkbits,
- 0, &err);
-
- CDEBUG(D_EXT2, "read %u@%llu\n", blksize, *off);
-
- if (bh) {
- memcpy(buf, bh->b_data, blksize);
- brelse(bh);
- } else if (err) {
- /* XXX in theory we should just fake
- * this buffer and continue like ext3,
- * especially if this is a partial read
- */
- CERROR("error read dir %lu+%llu: %d\n",
- inode->i_ino, *off, err);
- RETURN(err);
- }
- }
- if (!bh) {
- struct ext3_dir_entry_2 *fake = (void *)buf;
-
- CDEBUG(D_EXT2, "fake %u@%llu\n", blksize, *off);
- memset(fake, 0, sizeof(*fake));
- fake->rec_len = cpu_to_le32(blksize);
- }
- count -= blksize;
- buf += blksize;
- *off += blksize;
- rc += blksize;
- }
- }
-
- return rc;
-}
-
-static void fsfilt_ext3_cb_func(struct journal_callback *jcb, int error)
-{
- struct fsfilt_cb_data *fcb = (struct fsfilt_cb_data *)jcb;
-
- fcb->cb_func(fcb->cb_obd, fcb->cb_last_rcvd, fcb->cb_data, error);
-
- OBD_SLAB_FREE(fcb, fcb_cache, sizeof *fcb);
- atomic_dec(&fcb_cache_count);
-}
-
-static int fsfilt_ext3_set_last_rcvd(struct obd_device *obd, __u64 last_rcvd,
- void *handle, fsfilt_cb_t cb_func,
- void *cb_data)
-{
- struct fsfilt_cb_data *fcb;
-
- OBD_SLAB_ALLOC(fcb, fcb_cache, GFP_NOFS, sizeof *fcb);
- if (fcb == NULL)
- RETURN(-ENOMEM);
-
- atomic_inc(&fcb_cache_count);
- fcb->cb_func = cb_func;
- fcb->cb_obd = obd;
- fcb->cb_last_rcvd = last_rcvd;
- fcb->cb_data = cb_data;
-
- CDEBUG(D_EXT2, "set callback for last_rcvd: "LPD64"\n", last_rcvd);
- lock_kernel();
- journal_callback_set(handle, fsfilt_ext3_cb_func,
- (struct journal_callback *)fcb);
- unlock_kernel();
-
- return 0;
-}
-
-static int fsfilt_ext3_journal_data(struct file *filp)
-{
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
- /* bug 1576: enable data journaling on 2.5 when appropriate */
- struct inode *inode = filp->f_dentry->d_inode;
- EXT3_I(inode)->i_flags |= EXT3_JOURNAL_DATA_FL;
-#endif
- return 0;
-}
-
-/*
- * We need to hack the return value for the free inode counts because
- * the current EA code requires one filesystem block per inode with EAs,
- * so it is possible to run out of blocks before we run out of inodes.
- *
- * This can be removed when the ext3 EA code is fixed.
- */
-static int fsfilt_ext3_statfs(struct super_block *sb, struct obd_statfs *osfs)
-{
- struct kstatfs sfs;
- int rc = vfs_statfs(sb, &sfs);
-
- if (!rc && sfs.f_bfree < sfs.f_ffree) {
- sfs.f_files = (sfs.f_files - sfs.f_ffree) + sfs.f_bfree;
- sfs.f_ffree = sfs.f_bfree;
- }
-
- statfs_pack(osfs, &sfs);
- return rc;
-}
-
-static int fsfilt_ext3_sync(struct super_block *sb)
-{
- return ext3_force_commit(sb);
-}
-
-extern int ext3_prep_san_write(struct inode *inode, long *blocks,
- int nblocks, loff_t newsize);
-static int fsfilt_ext3_prep_san_write(struct inode *inode, long *blocks,
- int nblocks, loff_t newsize)
-{
- return ext3_prep_san_write(inode, blocks, nblocks, newsize);
-}
-
-static int fsfilt_ext3_read_record(struct file * file, void *buf,
- int size, loff_t *offs)
-{
- struct buffer_head *bh;
- unsigned long block, boffs;
- struct inode *inode = file->f_dentry->d_inode;
- int err;
-
- if (inode->i_size < *offs + size) {
- CERROR("file size %llu is too short for read %u@%llu\n",
- inode->i_size, size, *offs);
- return -EIO;
- }
-
- block = *offs >> inode->i_blkbits;
- bh = ext3_bread(NULL, inode, block, 0, &err);
- if (!bh) {
- CERROR("can't read block: %d\n", err);
- return err;
- }
-
- boffs = (unsigned)*offs % bh->b_size;
- if (boffs + size > bh->b_size) {
- CERROR("request crosses block's border. offset %llu, size %u\n",
- *offs, size);
- brelse(bh);
- return -EIO;
- }
-
- memcpy(buf, bh->b_data + boffs, size);
- brelse(bh);
- *offs += size;
- return 0;
-}
-
-static int fsfilt_ext3_write_record(struct file *file, void *buf, int size,
- loff_t *offs, int force_sync)
-{
- struct buffer_head *bh;
- unsigned long block, boffs;
- struct inode *inode = file->f_dentry->d_inode;
- loff_t old_size = inode->i_size;
- journal_t *journal;
- handle_t *handle;
- int err;
-
- journal = EXT3_SB(inode->i_sb)->s_journal;
- handle = journal_start(journal, EXT3_DATA_TRANS_BLOCKS + 2);
- if (IS_ERR(handle)) {
- CERROR("can't start transaction\n");
- return PTR_ERR(handle);
- }
-
- block = *offs >> inode->i_blkbits;
- if (*offs + size > inode->i_size) {
- down(&inode->i_sem);
- if (*offs + size > inode->i_size)
- inode->i_size = ((loff_t)block + 1) << inode->i_blkbits;
- up(&inode->i_sem);
- }
-
- bh = ext3_bread(handle, inode, block, 1, &err);
- if (!bh) {
- CERROR("can't read/create block: %d\n", err);
- goto out;
- }
-
- /* This is a hack only needed because ext3_get_block_handle() updates
- * i_disksize after marking the inode dirty in ext3_splice_branch().
- * We will fix that when we get a chance, as ext3_mark_inode_dirty()
- * is not without cost, nor is it even exported.
- */
- if (inode->i_size > old_size)
- mark_inode_dirty(inode);
-
- boffs = (unsigned)*offs % bh->b_size;
- if (boffs + size > bh->b_size) {
- CERROR("request crosses block's border. offset %llu, size %u\n",
- *offs, size);
- err = -EIO;
- goto out;
- }
-
- err = ext3_journal_get_write_access(handle, bh);
- if (err) {
- CERROR("journal_get_write_access() returned error %d\n", err);
- goto out;
- }
- 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);
- goto out;
- }
-
- if (force_sync)
- handle->h_sync = 1; /* recovery likes this */
-out:
- if (bh)
- brelse(bh);
- journal_stop(handle);
- if (err == 0)
- *offs += size;
- return err;
-}
-
-static struct fsfilt_operations fsfilt_ext3_ops = {
- fs_type: "ext3",
- fs_owner: THIS_MODULE,
- fs_start: fsfilt_ext3_start,
- fs_brw_start: fsfilt_ext3_brw_start,
- fs_commit: fsfilt_ext3_commit,
- fs_setattr: fsfilt_ext3_setattr,
- fs_set_md: fsfilt_ext3_set_md,
- fs_get_md: fsfilt_ext3_get_md,
- fs_readpage: fsfilt_ext3_readpage,
- fs_journal_data: fsfilt_ext3_journal_data,
- fs_set_last_rcvd: fsfilt_ext3_set_last_rcvd,
- fs_statfs: fsfilt_ext3_statfs,
- fs_sync: fsfilt_ext3_sync,
- fs_prep_san_write: fsfilt_ext3_prep_san_write,
- fs_write_record: fsfilt_ext3_write_record,
- fs_read_record: fsfilt_ext3_read_record,
-};
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
-
-#warning "fsfilt_ext3_init() and fsfilt_ext3_exit() aren't called on 2.6. MUST be fixed"
-
-static int __init fsfilt_ext3_init(void)
-{
- int rc;
-
- //rc = ext3_xattr_register();
- fcb_cache = kmem_cache_create("fsfilt_ext3_fcb",
- sizeof(struct fsfilt_cb_data), 0,
- 0, NULL, 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)
-{
- int rc;
-
- fsfilt_unregister_ops(&fsfilt_ext3_ops);
- rc = kmem_cache_destroy(fcb_cache);
-
- if (rc || atomic_read(&fcb_cache_count)) {
- CERROR("can't free fsfilt callback cache: count %d, rc = %d\n",
- atomic_read(&fcb_cache_count), rc);
- }
-
- //rc = ext3_xattr_unregister();
-}
-
-MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
-MODULE_DESCRIPTION("Lustre ext3 Filesystem Helper v0.1");
-MODULE_LICENSE("GPL");
-
-module_init(fsfilt_ext3_init);
-module_exit(fsfilt_ext3_exit);
-
-#endif
-
+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * lustre/lib/fsfilt_reiserfs.c
- * Lustre filesystem abstraction routines
- *
- * Copyright (C) 2002 Cluster File Systems, Inc.
- * Author: Andreas Dilger <adilger@clusterfs.com>
- *
- * This file is part of Lustre, http://www.lustre.org.
- *
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * Lustre 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 for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-/*
- * NOTE - According to Hans Reiser, this could actually be implemented more
- * efficiently than creating a directory and putting ASCII objids in it.
- * Instead, we should return the reiserfs object ID as the lustre objid
- * (although I'm not sure what impact that would have on backup/restore).
- */
-
-#define DEBUG_SUBSYSTEM S_FILTER
-
-#include <linux/fs.h>
-#include <linux/jbd.h>
-#include <linux/slab.h>
-#include <linux/pagemap.h>
-#include <linux/quotaops.h>
-#include <linux/version.h>
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
-#include <linux/init.h>
-#include <asm/statfs.h>
-#endif
-#include <linux/kp30.h>
-#include <linux/lustre_fsfilt.h>
-#include <linux/obd.h>
-#include <linux/obd_class.h>
-#include <linux/module.h>
-
-static void *fsfilt_reiserfs_start(struct inode *inode, int op,
- void *desc_private)
-{
- return (void *)0xf00f00be;
-}
-
-static void *fsfilt_reiserfs_brw_start(int objcount, struct fsfilt_objinfo *fso,
- int niocount, void *desc_private)
-{
- return (void *)0xf00f00be;
-}
-
-static int fsfilt_reiserfs_commit(struct inode *inode, void *handle,
- int force_sync)
-{
- if (handle != (void *)0xf00f00be) {
- CERROR("bad handle %p", handle);
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int fsfilt_reiserfs_setattr(struct dentry *dentry, void *handle,
- struct iattr *iattr, int do_trunc)
-{
- struct inode *inode = dentry->d_inode;
- int rc;
-
- lock_kernel();
-
- /* A _really_ horrible hack to avoid removing the data stored
- * in the block pointers; this is really the "small" stripe MD data.
- * We can avoid further hackery by virtue of the MDS file size being
- * zero all the time (which doesn't invoke block truncate at unlink
- * time), so we assert we never change the MDS file size from zero.
- */
- if (iattr->ia_valid & ATTR_SIZE && !do_trunc) {
- /* ATTR_SIZE would invoke truncate: clear it */
- iattr->ia_valid &= ~ATTR_SIZE;
- inode->i_size = iattr->ia_size;
-
- /* make sure _something_ gets set - so new inode
- * goes to disk (probably won't work over XFS
- */
- if (!iattr->ia_valid & ATTR_MODE) {
- iattr->ia_valid |= ATTR_MODE;
- iattr->ia_mode = inode->i_mode;
- }
- }
- if (inode->i_op->setattr)
- rc = inode->i_op->setattr(dentry, iattr);
- else
- rc = inode_setattr(inode, iattr);
-
- unlock_kernel();
-
- return rc;
-}
-
-static int fsfilt_reiserfs_set_md(struct inode *inode, void *handle,
- void *lmm, int lmm_size)
-{
- /* XXX write stripe data into MDS file itself */
- CERROR("not implemented yet\n");
-
- return -ENOSYS;
-}
-
-static int fsfilt_reiserfs_get_md(struct inode *inode, void *lmm, int lmm_size)
-{
- if (lmm == NULL)
- return inode->i_size;
-
- CERROR("not implemented yet\n");
- return -ENOSYS;
-}
-
-static ssize_t fsfilt_reiserfs_readpage(struct file *file, char *buf, size_t count,
- loff_t *offset)
-{
- return file->f_op->read(file, buf, count, offset);
-}
-
-static int fsfilt_reiserfs_set_last_rcvd(struct obd_device *obd,
- __u64 last_rcvd, void *handle,
- fsfilt_cb_t cb_func, void *cb_data)
-{
- static long next = 0;
-
- if (time_after(jiffies, next)) {
- CERROR("no journal callback kernel patch, faking it...\n");
- next = jiffies + 300 * HZ;
- }
-
- cb_func(obd, last_rcvd, cb_data, 0);
-
- return 0;
-}
-
-static int fsfilt_reiserfs_journal_data(struct file *filp)
-{
- CERROR("not implemented yet\n");
- return 0;
-}
-
-static int fsfilt_reiserfs_statfs(struct super_block *sb, struct obd_statfs *osfs)
-{
- struct statfs sfs;
- int rc = vfs_statfs(sb, &sfs);
-
- statfs_pack(osfs, &sfs);
- return rc;
-}
-
-static int fsfilt_reiserfs_sync(struct super_block *sb)
-{
- CERROR("not implemented yet\n");
- return -ENOSYS;
-}
-
-static struct fsfilt_operations fsfilt_reiserfs_ops = {
- fs_type: "reiserfs",
- fs_owner: THIS_MODULE,
- fs_start: fsfilt_reiserfs_start,
- fs_brw_start: fsfilt_reiserfs_brw_start,
- fs_commit: fsfilt_reiserfs_commit,
- fs_setattr: fsfilt_reiserfs_setattr,
- fs_set_md: fsfilt_reiserfs_set_md,
- fs_get_md: fsfilt_reiserfs_get_md,
- fs_readpage: fsfilt_reiserfs_readpage,
- fs_journal_data: fsfilt_reiserfs_journal_data,
- fs_set_last_rcvd: fsfilt_reiserfs_set_last_rcvd,
- fs_statfs: fsfilt_reiserfs_statfs,
- fs_sync: fsfilt_reiserfs_sync,
-};
-
-static int __init fsfilt_reiserfs_init(void)
-{
- return fsfilt_register_ops(&fsfilt_reiserfs_ops);
-}
-
-static void __exit fsfilt_reiserfs_exit(void)
-{
- fsfilt_unregister_ops(&fsfilt_reiserfs_ops);
-}
-
-MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
-MODULE_DESCRIPTION("Lustre reiserfs Filesystem Helper v0.1");
-MODULE_LICENSE("GPL");
-
-module_init(fsfilt_reiserfs_init);
-module_exit(fsfilt_reiserfs_exit);
git://git.whamcloud.com / fs / lustre-release.git / commitdiff