From: phil Date: Tue, 9 Sep 2003 04:49:09 +0000 (+0000) Subject: land b_llog on b_devel: X-Git-Tag: v1_7_100~1^368~55 X-Git-Url: https://git.whamcloud.com/?a=commitdiff_plain;h=907048a0767e7990a63da717f36526b9b429c4c7;p=fs%2Flustre-release.git land b_llog on b_devel: reorganization and API update of the logging infrastructure. minimal changes to the other code. --- diff --git a/lustre/obdclass/fsfilt_ext3.c b/lustre/obdclass/fsfilt_ext3.c deleted file mode 100644 index 830bf68..0000000 --- a/lustre/obdclass/fsfilt_ext3.c +++ /dev/null @@ -1,699 +0,0 @@ -/* -*- 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 - * - * 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 -#include -#include -#include -#include -#include -#include -#include -/* XXX ugh */ -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)) - #include -#else - #include -#endif -#include -#include -#include -#include -#include - -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. "); -MODULE_DESCRIPTION("Lustre ext3 Filesystem Helper v0.1"); -MODULE_LICENSE("GPL"); - -module_init(fsfilt_ext3_init); -module_exit(fsfilt_ext3_exit); - -#endif - diff --git a/lustre/obdclass/fsfilt_reiserfs.c b/lustre/obdclass/fsfilt_reiserfs.c deleted file mode 100644 index 3d118fc..0000000 --- a/lustre/obdclass/fsfilt_reiserfs.c +++ /dev/null @@ -1,203 +0,0 @@ -/* -*- 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 - * - * 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 -#include -#include -#include -#include -#include -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -#include -#include -#endif -#include -#include -#include -#include -#include - -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. "); -MODULE_DESCRIPTION("Lustre reiserfs Filesystem Helper v0.1"); -MODULE_LICENSE("GPL"); - -module_init(fsfilt_reiserfs_init); -module_exit(fsfilt_reiserfs_exit);