/* -*- 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 */ }; #ifndef EXT3_XATTR_INDEX_TRUSTED /* temporary until we hit l28 kernel */ #define EXT3_XATTR_INDEX_TRUSTED 4 #endif #define XATTR_LUSTRE_MDS_LOV_EA "lov" #define EXT3_XATTR_INDEX_LUSTRE 5 /* old */ #define XATTR_LUSTRE_MDS_OBJID "system.lustre_mds_objid" /* old */ /* * 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; if (current->journal_info) { CDEBUG(D_INODE, "increasing refcount on %p\n", current->journal_info); goto journal_start; } 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); journal_start: 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; #if defined(CONFIG_QUOTA) && !defined(__x86_64__) /* XXX */ /* 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_commit_async(struct inode *inode, void *h, void **wait_handle) { transaction_t *transaction; unsigned long tid, rtid; handle_t *handle = h; journal_t *journal; int rc; LASSERT(current->journal_info == handle); lock_kernel(); transaction = handle->h_transaction; journal = transaction->t_journal; tid = transaction->t_tid; /* we don't want to be blocked */ handle->h_sync = 0; rc = journal_stop(handle); if (rc) { CERROR("error while stopping transaction: %d\n", rc); unlock_kernel(); return rc; } #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) rtid = log_start_commit(journal, transaction); if (rtid != tid) CERROR("strange race: %lu != %lu\n", (unsigned long) tid, (unsigned long) rtid); #else log_start_commit(journal, transaction->t_tid); #endif unlock_kernel(); *wait_handle = (void *) tid; CDEBUG(D_INODE, "commit async: %lu\n", (unsigned long) tid); return 0; } static int fsfilt_ext3_commit_wait(struct inode *inode, void *h) { tid_t tid = (tid_t)(long)h; CDEBUG(D_INODE, "commit wait: %lu\n", (unsigned long) tid); if (is_journal_aborted(EXT3_JOURNAL(inode))) return -EIO; log_wait_commit(EXT3_JOURNAL(inode), tid); return 0; } 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); /* We set these flags on the client, but have already checked perms * so don't confuse inode_change_ok. */ iattr->ia_valid &= ~(ATTR_MTIME_SET | ATTR_ATIME_SET); 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_iocontrol(struct inode * inode, struct file *file, unsigned int cmd, unsigned long arg) { int rc = 0; ENTRY; if (inode->i_fop->ioctl) rc = inode->i_fop->ioctl(inode, file, cmd, arg); else RETURN(-ENOTTY); RETURN(rc); } #undef INLINE_EA #undef OLD_EA static int fsfilt_ext3_set_md(struct inode *inode, void *handle, void *lmm, int lmm_size) { int rc, old_ea = 0; #ifdef INLINE_EA /* can go away before 1.0 - just for testing bug 2097 now */ /* 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])) { unsigned 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/%u again... interesting\n", inode->i_ino, inode->i_generation); } 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; } #endif #ifdef OLD_EA /* keep this when we get rid of OLD_EA (too noisy during conversion) */ if (EXT3_I(inode)->i_file_acl /* || large inode EA flag */) { CWARN("setting EA on %lu/%u again... interesting\n", inode->i_ino, inode->i_generation); old_ea = 1; } lock_kernel(); /* this can go away before 1.0. For bug 2097 testing only. */ rc = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_LUSTRE, XATTR_LUSTRE_MDS_OBJID, lmm, lmm_size, 0); #else lock_kernel(); rc = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_TRUSTED, XATTR_LUSTRE_MDS_LOV_EA, lmm, lmm_size, 0); /* This tries to delete the old-format LOV EA, but only as long as we * have successfully saved the new-format LOV EA (we can always try * the conversion again the next time the file is accessed). It is * possible (although unlikely) that the new-format LOV EA couldn't be * saved because it ran out of space but we would need a file striped * over least 123 OSTs before the two EAs filled a 4kB block. * * This can be removed when all filesystems have converted to the * new EA format, but otherwise adds little if any overhead. If we * wanted backward compatibility for existing files, we could keep * the old EA around for a while but we'd have to clean it up later. */ if (rc >= 0 && old_ea) { int err = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_LUSTRE, XATTR_LUSTRE_MDS_OBJID, NULL, 0, 0); if (err) CERROR("error deleting old LOV EA on %lu/%u: rc %d\n", inode->i_ino, inode->i_generation, err); } #endif unlock_kernel(); if (rc) CERROR("error adding MD data to inode %lu: rc = %d\n", inode->i_ino, rc); return rc; } /* Must be called with i_sem held */ static int fsfilt_ext3_get_md(struct inode *inode, void *lmm, int lmm_size) { int rc; LASSERT(down_trylock(&inode->i_sem) != 0); lock_kernel(); /* Keep support for reading "inline EAs" until we convert * users over to new format entirely. See bug 841/2097. */ if (inode->i_blocks == 0 && EXT3_I(inode)->i_data[0]) { unsigned size = le32_to_cpu(EXT3_I(inode)->i_data[0]); void *handle; LASSERT(size < sizeof(EXT3_I(inode)->i_data)); if (lmm) { if (size > lmm_size) { CERROR("inline EA on %lu/%u bad size %u > %u\n", inode->i_ino, inode->i_generation, size, lmm_size); return -ERANGE; } memcpy(lmm, &EXT3_I(inode)->i_data[1], size); } #ifndef INLINE_EA /* migrate LOV EA data to external block - keep same format */ CWARN("DEBUG: migrate inline EA for inode %lu/%u to block\n", inode->i_ino, inode->i_generation); handle = journal_start(EXT3_JOURNAL(inode), EXT3_XATTR_TRANS_BLOCKS); if (!IS_ERR(handle)) { int err; rc = fsfilt_ext3_set_md(inode, handle, &EXT3_I(inode)->i_data[1],size); if (rc == 0) { memset(EXT3_I(inode)->i_data, 0, sizeof(EXT3_I(inode)->i_data)); mark_inode_dirty(inode); } err = journal_stop(handle); if (err && rc == 0) rc = err; } else { rc = PTR_ERR(handle); } #endif unlock_kernel(); return size; } rc = ext3_xattr_get(inode, EXT3_XATTR_INDEX_TRUSTED, XATTR_LUSTRE_MDS_LOV_EA, lmm, lmm_size); /* try old EA type if new one failed - MDS will convert it for us */ if (rc == -ENODATA) { CDEBUG(D_INFO,"failed new LOV EA %d/%s from inode %lu: rc %d\n", EXT3_XATTR_INDEX_TRUSTED, XATTR_LUSTRE_MDS_LOV_EA, inode->i_ino, rc); rc = ext3_xattr_get(inode, EXT3_XATTR_INDEX_LUSTRE, XATTR_LUSTRE_MDS_OBJID, lmm, lmm_size); } unlock_kernel(); /* This gives us the MD size */ if (lmm == NULL) return (rc == -ENODATA) ? 0 : rc; if (rc < 0) { CDEBUG(D_INFO, "error getting EA %d/%s from inode %lu: rc %d\n", EXT3_XATTR_INDEX_LUSTRE, 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_add_journal_cb(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; } /* * 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_map_inode_page(struct inode *inode, struct page *page, unsigned long *blocks, int *created, int create); int fsfilt_ext3_map_inode_page(struct inode *inode, struct page *page, unsigned long *blocks, int *created, int create) { return ext3_map_inode_page(inode, page, blocks, created, create); } 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 inode *inode = file->f_dentry->d_inode; unsigned long block; struct buffer_head *bh; int err, blocksize, csize, boffs; /* prevent reading after eof */ lock_kernel(); if (inode->i_size < *offs + size) { size = inode->i_size - *offs; unlock_kernel(); if (size < 0) { CERROR("size %llu is too short for read %u@%llu\n", inode->i_size, size, *offs); return -EIO; } else if (size == 0) { return 0; } } else { unlock_kernel(); } 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 0; } static int fsfilt_ext3_write_record(struct file *file, void *buf, int bufsize, loff_t *offs, int force_sync) { struct buffer_head *bh = NULL; unsigned long block; struct inode *inode = file->f_dentry->d_inode; loff_t old_size = inode->i_size, offset = *offs; loff_t new_size = inode->i_size; journal_t *journal; handle_t *handle; int err, block_count = 0, blocksize, size, boffs; /* 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; journal = EXT3_SB(inode->i_sb)->s_journal; lock_kernel(); handle = journal_start(journal, block_count * EXT3_DATA_TRANS_BLOCKS + 2); unlock_kernel(); if (IS_ERR(handle)) { CERROR("can't start transaction\n"); return PTR_ERR(handle); } 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); goto out; } err = ext3_journal_get_write_access(handle, bh); if (err) { CERROR("journal_get_write_access() returned error %d\n", err); goto out; } 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); goto out; } if (offset + size > new_size) new_size = offset + size; offset += size; bufsize -= size; buf += size; } if (force_sync) handle->h_sync = 1; /* recovery likes this */ out: if (bh) brelse(bh); /* correct in-core and on-disk sizes */ if (new_size > inode->i_size) { lock_kernel(); if (new_size > inode->i_size) inode->i_size = new_size; if (inode->i_size > EXT3_I(inode)->i_disksize) EXT3_I(inode)->i_disksize = inode->i_size; if (inode->i_size > old_size) mark_inode_dirty(inode); unlock_kernel(); } lock_kernel(); journal_stop(handle); unlock_kernel(); if (err == 0) *offs = offset; return err; } static int fsfilt_ext3_setup(struct super_block *sb) { #if 0 EXT3_SB(sb)->dx_lock = fsfilt_ext3_dx_lock; EXT3_SB(sb)->dx_unlock = fsfilt_ext3_dx_unlock; #endif #ifdef S_PDIROPS CWARN("Enabling PDIROPS\n"); set_opt(EXT3_SB(sb)->s_mount_opt, PDIROPS); sb->s_flags |= S_PDIROPS; #endif return 0; } 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_commit_async: fsfilt_ext3_commit_async, fs_commit_wait: fsfilt_ext3_commit_wait, fs_setattr: fsfilt_ext3_setattr, fs_iocontrol: fsfilt_ext3_iocontrol, fs_set_md: fsfilt_ext3_set_md, fs_get_md: fsfilt_ext3_get_md, fs_readpage: fsfilt_ext3_readpage, fs_add_journal_cb: fsfilt_ext3_add_journal_cb, fs_statfs: fsfilt_ext3_statfs, fs_sync: fsfilt_ext3_sync, fs_map_inode_page: fsfilt_ext3_map_inode_page, fs_prep_san_write: fsfilt_ext3_prep_san_write, 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) { 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_init(fsfilt_ext3_init); module_exit(fsfilt_ext3_exit); MODULE_AUTHOR("Cluster File Systems, Inc. "); MODULE_DESCRIPTION("Lustre ext3 Filesystem Helper v0.1"); MODULE_LICENSE("GPL");