#ifdef __KERNEL__
#include <linux/obd.h>
+#include <linux/obd_class.h>
typedef void (*fsfilt_cb_t)(struct obd_device *obd, __u64 last_rcvd,
void *data, int error);
struct list_head fs_list;
struct module *fs_owner;
char *fs_type;
- void *(* fs_start)(struct inode *inode, int op, void *desc_private);
+ void *(* fs_start)(struct inode *inode, int op, void *desc_private,
+ int logs);
void *(* fs_brw_start)(int objcount, struct fsfilt_objinfo *fso,
int niocount, struct niobuf_local *nb,
- void *desc_private);
+ void *desc_private, int logs);
int (* fs_commit)(struct inode *inode, void *handle,int force_sync);
int (* fs_commit_async)(struct inode *inode, void *handle,
void **wait_handle);
int force_sync);
int (* fs_read_record)(struct file *, void *, int size, loff_t *);
int (* fs_setup)(struct super_block *sb);
+ int (* fs_get_op_len)(int, struct fsfilt_objinfo *, int);
};
extern int fsfilt_register_ops(struct fsfilt_operations *fs_ops);
#define FSFILT_OP_MKNOD 7
#define FSFILT_OP_SETATTR 8
#define FSFILT_OP_LINK 9
-#define FSFILT_OP_CREATE_LOG 10
-#define FSFILT_OP_UNLINK_LOG 11
-#define FSFILT_OP_CANCEL_UNLINK_LOG 12
+#define FSFILT_OP_CANCEL_UNLINK 10
-static inline void *fsfilt_start(struct obd_device *obd, struct inode *inode,
- int op, struct obd_trans_info *oti)
+struct obd_reservation_handle {
+ void *orh_filt_handle;
+ int orh_reserve;
+};
+
+static inline int fsfilt_reserve(struct obd_device *obd,
+ int reserve, struct obd_reservation_handle **h)
+{
+ struct obd_reservation_handle *handle;
+
+ OBD_ALLOC(handle, sizeof(*handle));
+ if (!handle)
+ return -ENOMEM;
+
+ /* Perform space reservation if needed */
+ if (reserve) {
+ down(&obd->obd_reserve_guard);
+ obd->obd_reserve_freespace_estimated -= reserve;
+ if (obd->obd_reserve_freespace_estimated < 0) {
+ struct obd_statfs osfs;
+ /* Can we use jiffies here, or is there a race window
+ where somebody calls obd_statfs(), caches data, then
+ uses some space, and then we came and get this same
+ (now stale) cached data all within same jiffie?
+ maybe jiffies-1 should be used? */
+ int rc = obd_statfs(obd, &osfs, jiffies);
+ if (rc) {
+ CERROR("statfs failed during reservation\n");
+ up(&obd->obd_reserve_guard);
+ OBD_FREE(handle, sizeof(*handle));
+ return rc;
+ }
+ /* Some filesystems (e.g. reiserfs) report more space
+ * available compared to what is really available
+ * (reiserfs reserves 1996K for itself).
+ */
+ obd->obd_reserve_freespace_estimated = osfs.os_bavail -
+ obd->obd_reserved_space;
+ if (obd->obd_reserve_freespace_estimated < reserve) {
+ up(&obd->obd_reserve_guard);
+ OBD_FREE(handle, sizeof(*handle));
+ return -ENOSPC;
+ }
+ obd->obd_reserve_freespace_estimated -= reserve;
+ }
+ obd->obd_reserved_space += reserve;
+ handle->orh_reserve = reserve;
+ up(&obd->obd_reserve_guard);
+ }
+ *h = handle;
+ return 0;
+}
+
+static inline void *fsfilt_start_log(struct obd_device *obd,
+ struct inode *inode, int op,
+ struct obd_trans_info *oti, int logs)
{
unsigned long now = jiffies;
- void *parent_handle = oti ? oti->oti_handle : NULL;
- void *handle = obd->obd_fsops->fs_start(inode, op, parent_handle);
- CDEBUG(D_INFO, "started handle %p (%p)\n", handle, parent_handle);
+ struct obd_reservation_handle *parent_handle = oti?oti->oti_handle:NULL;
+ struct obd_reservation_handle *h;
+ int reserve = 0;
+ int rc;
+
+ if (obd->obd_fsops->fs_get_op_len)
+ reserve = obd->obd_fsops->fs_get_op_len(op, NULL, logs);
+
+ rc = fsfilt_reserve(obd, reserve, &h);
+ if (rc)
+ return ERR_PTR(rc);
+
+ h->orh_filt_handle = obd->obd_fsops->fs_start(inode, op, parent_handle,
+ logs);
+ CDEBUG(D_HA, "started handle %p (%p)\n", h->orh_filt_handle,
+ parent_handle);
if (oti != NULL) {
if (parent_handle == NULL) {
- oti->oti_handle = handle;
- } else if (handle != parent_handle) {
+ oti->oti_handle = h;
+ } else if (h->orh_filt_handle != parent_handle) {
CERROR("mismatch: parent %p, handle %p, oti %p\n",
- parent_handle, handle, oti->oti_handle);
+ parent_handle->orh_filt_handle,
+ h->orh_filt_handle, oti);
LBUG();
}
}
if (time_after(jiffies, now + 15 * HZ))
CERROR("long journal start time %lus\n", (jiffies - now) / HZ);
- return handle;
+ return h;
}
-static inline void *fsfilt_brw_start(struct obd_device *obd, int objcount,
- struct fsfilt_objinfo *fso, int niocount,
- struct niobuf_local *nb,
- struct obd_trans_info *oti)
+static inline void *fsfilt_start(struct obd_device *obd,
+ struct inode *inode, int op,
+ struct obd_trans_info *oti)
+{
+ return fsfilt_start_log(obd, inode, op, oti, 0);
+}
+
+static inline void *fsfilt_brw_start_log(struct obd_device *obd, int objcount,
+ struct fsfilt_objinfo *fso,
+ int niocount, struct niobuf_local *nb,
+ struct obd_trans_info *oti,int numlogs)
{
unsigned long now = jiffies;
- void *parent_handle = oti ? oti->oti_handle : NULL;
- void *handle;
+ struct obd_reservation_handle *parent_handle = oti?oti->oti_handle:NULL;
+ struct obd_reservation_handle *h;
+ int reserve = 0;
+ int rc;
- handle = obd->obd_fsops->fs_brw_start(objcount, fso, niocount, nb,
- parent_handle);
- CDEBUG(D_HA, "started handle %p (%p)\n", handle, parent_handle);
+ if (obd->obd_fsops->fs_get_op_len)
+ reserve = obd->obd_fsops->fs_get_op_len(objcount, fso, numlogs);
+
+ rc = fsfilt_reserve(obd, reserve, &h);
+ if (rc)
+ return ERR_PTR(rc);
+
+ h->orh_filt_handle = obd->obd_fsops->fs_brw_start(objcount, fso,
+ niocount, nb,
+ parent_handle, numlogs);
+ CDEBUG(D_HA, "started handle %p (%p)\n", h->orh_filt_handle,
+ parent_handle);
if (oti != NULL) {
if (parent_handle == NULL) {
- oti->oti_handle = handle;
- } else if (handle != parent_handle) {
+ oti->oti_handle = h;
+ } else if (h->orh_filt_handle !=
+ parent_handle->orh_filt_handle) {
CERROR("mismatch: parent %p, handle %p, oti %p\n",
- parent_handle, handle, oti->oti_handle);
+ parent_handle->orh_filt_handle,
+ h->orh_filt_handle, oti);
LBUG();
}
}
if (time_after(jiffies, now + 15 * HZ))
CERROR("long journal start time %lus\n", (jiffies - now) / HZ);
- return handle;
+
+ return h;
+}
+
+static inline void *fsfilt_brw_start(struct obd_device *obd, int objcount,
+ struct fsfilt_objinfo *fso, int niocount,
+ struct niobuf_local *nb,
+ struct obd_trans_info *oti)
+{
+ return fsfilt_brw_start_log(obd, objcount, fso, niocount, nb, oti, 0);
}
static inline int fsfilt_commit(struct obd_device *obd, struct inode *inode,
void *handle, int force_sync)
{
unsigned long now = jiffies;
- int rc = obd->obd_fsops->fs_commit(inode, handle, force_sync);
- CDEBUG(D_INFO, "committing handle %p\n", handle);
+ struct obd_reservation_handle *h = handle;
+ int rc;
+
+ rc = obd->obd_fsops->fs_commit(inode, h->orh_filt_handle, force_sync);
+ CDEBUG(D_HA, "committing handle %p\n", h->orh_filt_handle);
+
if (time_after(jiffies, now + 15 * HZ))
CERROR("long journal start time %lus\n", (jiffies - now) / HZ);
+
+ down(&obd->obd_reserve_guard);
+ obd->obd_reserved_space -= h->orh_reserve;
+ LASSERT(obd->obd_reserved_space >= 0);
+ up(&obd->obd_reserve_guard);
+ OBD_FREE(h, sizeof(*h));
+
return rc;
}
void **wait_handle)
{
unsigned long now = jiffies;
- int rc = obd->obd_fsops->fs_commit_async(inode, handle, wait_handle);
+ struct obd_reservation_handle *h = handle;
+ int rc;
+
+ rc = obd->obd_fsops->fs_commit_async(inode, h->orh_filt_handle,
+ wait_handle);
+
CDEBUG(D_HA, "committing handle %p (async)\n", *wait_handle);
if (time_after(jiffies, now + 15 * HZ))
CERROR("long journal start time %lus\n", (jiffies - now) / HZ);
+
+ down(&obd->obd_reserve_guard);
+ obd->obd_reserved_space -= h->orh_reserve;
+ LASSERT(obd->obd_reserved_space >= 0);
+ up(&obd->obd_reserve_guard);
+ OBD_FREE(h, sizeof(*h));
+
return rc;
}
void *handle, struct iattr *iattr,int do_trunc)
{
unsigned long now = jiffies;
+ struct obd_reservation_handle *h = handle;
int rc;
- rc = obd->obd_fsops->fs_setattr(dentry, handle, iattr, do_trunc);
+ rc = obd->obd_fsops->fs_setattr(dentry, h->orh_filt_handle, iattr, do_trunc);
if (time_after(jiffies, now + 15 * HZ))
CERROR("long setattr time %lus\n", (jiffies - now) / HZ);
return rc;
static inline int fsfilt_set_md(struct obd_device *obd, struct inode *inode,
void *handle, void *md, int size)
{
- return obd->obd_fsops->fs_set_md(inode, handle, md, size);
+ struct obd_reservation_handle *h = handle;
+ return obd->obd_fsops->fs_set_md(inode, h->orh_filt_handle, md, size);
}
static inline int fsfilt_get_md(struct obd_device *obd, struct inode *inode,
void *handle, fsfilt_cb_t cb_func,
void *cb_data)
{
- return obd->obd_fsops->fs_add_journal_cb(obd, last_rcvd, handle,
- cb_func, cb_data);
+ struct obd_reservation_handle *h = handle;
+ return obd->obd_fsops->fs_add_journal_cb(obd, last_rcvd,
+ h->orh_filt_handle, cb_func,
+ cb_data);
}
/* very similar to obd_statfs(), but caller already holds obd_osfs_lock */
+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * lustre/lib/fsfilt_extN.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/extN_fs.h>
-#include <linux/extN_jbd.h>
-#include <linux/version.h>
-/* XXX ugh */
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
- #include <linux/extN_xattr.h>
-#else
- #include <linux/../../fs/extN/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 */
-};
-
-#ifndef EXTN_XATTR_INDEX_TRUSTED /* temporary until we hit l28 kernel */
-#define EXTN_XATTR_INDEX_TRUSTED 4
-#endif
-#define XATTR_LUSTRE_MDS_LOV_EA "lov"
-
-#define EXTN_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_extN_start(struct inode *inode, int op, void *desc_private)
-{
- /* For updates to the last recieved file */
- int nblocks = EXTN_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 += EXTN_INDEX_EXTRA_TRANS_BLOCKS+EXTN_DATA_TRANS_BLOCKS;
- op = FSFILT_OP_CREATE;
- break;
- case FSFILT_OP_UNLINK_LOG:
- nblocks += EXTN_INDEX_EXTRA_TRANS_BLOCKS+EXTN_DATA_TRANS_BLOCKS;
- op = FSFILT_OP_UNLINK;
- break;
- }
-
- switch(op) {
- case FSFILT_OP_RMDIR:
- case FSFILT_OP_UNLINK:
- nblocks += EXTN_DELETE_TRANS_BLOCKS;
- break;
- case FSFILT_OP_RENAME:
- /* modify additional directory */
- nblocks += EXTN_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 += EXTN_INDEX_EXTRA_TRANS_BLOCKS+EXTN_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(EXTN_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 extN transaction. No, this shouldn't be here, but as yet extN
- * doesn't have a nice API for calculating this sort of thing in advance.
- *
- * See comment above extN_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 * EXTN_SINGLEDATA_TRANS_BLOCKS for the quota files
- *
- * 1 EXTN_DATA_TRANS_BLOCKS for the last_rcvd update.
- */
-static int fsfilt_extN_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 = EXTN_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 extN and extN have same sb_info layout at the start. */
- if (nbitmaps > EXTN_SB(sb)->s_groups_count)
- nbitmaps = EXTN_SB(sb)->s_groups_count;
- if (ngdblocks > EXTN_SB(sb)->s_gdb_count)
- ngdblocks = EXTN_SB(sb)->s_gdb_count;
-
- needed += nbitmaps + ngdblocks;
-
- /* last_rcvd update */
- needed += EXTN_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)) *
- EXTN_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_extN_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 = EXTN_SB(fso->fso_dentry->d_inode->i_sb)->s_journal;
- needed = fsfilt_extN_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_extN_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_extN_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;
- }
-
- rtid = log_start_commit(journal, transaction);
- if (rtid != tid)
- CERROR("strange race: %lu != %lu\n",
- (unsigned long) tid, (unsigned long) rtid);
- unlock_kernel();
-
- *wait_handle = (void *) tid;
- CDEBUG(D_INODE, "commit async: %lu\n", (unsigned long) tid);
- return 0;
-}
-
-static int fsfilt_extN_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(EXTN_JOURNAL(inode)))
- return -EIO;
-
- log_wait_commit(EXTN_JOURNAL(inode), tid);
-
- return 0;
-}
-
-static int fsfilt_extN_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;
- EXTN_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_extN_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_extN_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(EXTN_I(inode)->i_data) -
- sizeof(EXTN_I(inode)->i_data[0])) {
- unsigned old_size = EXTN_I(inode)->i_data[0];
- if (old_size != 0) {
- LASSERT(old_size < sizeof(EXTN_I(inode)->i_data));
- CERROR("setting EA on %lu/%u again... interesting\n",
- inode->i_ino, inode->i_generation);
- }
-
- EXTN_I(inode)->i_data[0] = cpu_to_le32(lmm_size);
- memcpy(&EXTN_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 (EXTN_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 = extN_xattr_set_handle(handle, inode, EXTN_XATTR_INDEX_LUSTRE,
- XATTR_LUSTRE_MDS_OBJID, lmm, lmm_size, 0);
-#else
- lock_kernel();
- rc = extN_xattr_set_handle(handle, inode, EXTN_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 = extN_xattr_set_handle(handle, inode,
- EXTN_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_extN_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 && EXTN_I(inode)->i_data[0]) {
- unsigned size = le32_to_cpu(EXTN_I(inode)->i_data[0]);
- void *handle;
-
- LASSERT(size < sizeof(EXTN_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, &EXTN_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(EXTN_JOURNAL(inode),
- EXTN_XATTR_TRANS_BLOCKS);
- if (!IS_ERR(handle)) {
- int err;
- rc = fsfilt_extN_set_md(inode, handle,
- &EXTN_I(inode)->i_data[1],size);
- if (rc == 0) {
- memset(EXTN_I(inode)->i_data, 0,
- sizeof(EXTN_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 = extN_xattr_get(inode, EXTN_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",
- EXTN_XATTR_INDEX_TRUSTED, XATTR_LUSTRE_MDS_LOV_EA,
- inode->i_ino, rc);
-
- rc = extN_xattr_get(inode, EXTN_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",
- EXTN_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_extN_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 = extN_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 extN,
- * 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 extN_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_extN_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_extN_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_extN_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 extN EA code is fixed.
- */
-static int fsfilt_extN_statfs(struct super_block *sb, struct obd_statfs *osfs)
-{
- struct kstatfs sfs;
- int rc;
-
- memset(&sfs, 0, sizeof(sfs));
-
- rc = sb->s_op->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_extN_sync(struct super_block *sb)
-{
- return extN_force_commit(sb);
-}
-
-extern int extN_map_inode_page(struct inode *inode, struct page *page,
- unsigned long *blocks, int *created, int create);
-int fsfilt_extN_map_inode_page(struct inode *inode, struct page *page,
- unsigned long *blocks, int *created, int create)
-{
- return extN_map_inode_page(inode, page, blocks, created, create);
-}
-
-extern int extN_prep_san_write(struct inode *inode, long *blocks,
- int nblocks, loff_t newsize);
-static int fsfilt_extN_prep_san_write(struct inode *inode, long *blocks,
- int nblocks, loff_t newsize)
-{
- return extN_prep_san_write(inode, blocks, nblocks, newsize);
-}
-
-static int fsfilt_extN_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) {
- size = inode->i_size - *offs;
- 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;
- }
-
- block = *offs >> inode->i_blkbits;
- bh = extN_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_extN_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 = EXTN_SB(inode->i_sb)->s_journal;
- handle = journal_start(journal, EXTN_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 = *offs + size;
- if (inode->i_size > EXTN_I(inode)->i_disksize)
- EXTN_I(inode)->i_disksize = inode->i_size;
- up(&inode->i_sem);
- }
-
- bh = extN_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 extN_get_block_handle() updates
- * i_disksize after marking the inode dirty in extN_splice_branch().
- * We will fix that when we get a chance, as extN_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 = extN_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 = extN_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 int fsfilt_extN_setup(struct super_block *sb)
-{
-#if 0
- EXTN_SB(sb)->dx_lock = fsfilt_extN_dx_lock;
- EXTN_SB(sb)->dx_unlock = fsfilt_extN_dx_unlock;
-#endif
-#ifdef S_PDIROPS
- CWARN("Enabling PDIROPS\n");
- set_opt(EXTN_SB(sb)->s_mount_opt, PDIROPS);
- sb->s_flags |= S_PDIROPS;
-#endif
- return 0;
-}
-
-static struct fsfilt_operations fsfilt_extN_ops = {
- fs_type: "extN",
- fs_owner: THIS_MODULE,
- fs_start: fsfilt_extN_start,
- fs_brw_start: fsfilt_extN_brw_start,
- fs_commit: fsfilt_extN_commit,
- fs_commit_async: fsfilt_extN_commit_async,
- fs_commit_wait: fsfilt_extN_commit_wait,
- fs_setattr: fsfilt_extN_setattr,
- fs_iocontrol: fsfilt_extN_iocontrol,
- fs_set_md: fsfilt_extN_set_md,
- fs_get_md: fsfilt_extN_get_md,
- fs_readpage: fsfilt_extN_readpage,
- fs_add_journal_cb: fsfilt_extN_add_journal_cb,
- fs_statfs: fsfilt_extN_statfs,
- fs_sync: fsfilt_extN_sync,
- fs_map_inode_page: fsfilt_extN_map_inode_page,
- fs_prep_san_write: fsfilt_extN_prep_san_write,
- fs_write_record: fsfilt_extN_write_record,
- fs_read_record: fsfilt_extN_read_record,
- fs_setup: fsfilt_extN_setup,
-};
-
-static int __init fsfilt_extN_init(void)
-{
- int rc;
-
- //rc = extN_xattr_register();
- fcb_cache = kmem_cache_create("fsfilt_extN_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_extN_ops);
-
- if (rc)
- kmem_cache_destroy(fcb_cache);
-out:
- return rc;
-}
-
-static void __exit fsfilt_extN_exit(void)
-{
- int rc;
-
- fsfilt_unregister_ops(&fsfilt_extN_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 = extN_xattr_unregister();
-}
-
-module_init(fsfilt_extN_init);
-module_exit(fsfilt_extN_exit);
-
-MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
-MODULE_DESCRIPTION("Lustre extN Filesystem Helper v0.1");
-MODULE_LICENSE("GPL");
git://git.whamcloud.com / fs / lustre-release.git / commitdiff