#include <linux/ext3_fs.h>
#include <linux/ext3_jbd.h>
#include <linux/lustre_mds.h>
+#include <linux/module.h>
+
+static struct mds_fs_operations mds_ext3_fs_ops;
+static kmem_cache_t *jcb_cache;
+static int jcb_cache_count;
+
+struct mds_cb_data {
+ struct journal_callback cb_jcb;
+ struct mds_obd *cb_mds;
+ __u64 cb_last_rcvd;
+};
/*
* We don't currently need any additional blocks for rmdir and
switch(op) {
case MDS_FSOP_RMDIR:
case MDS_FSOP_UNLINK:
- nblocks += EXT3_DELETE_TRANS_BLOCKS; break;
+ nblocks += EXT3_DELETE_TRANS_BLOCKS;
+ break;
case MDS_FSOP_RENAME:
+ /* We may be modifying two directories */
nblocks += EXT3_DATA_TRANS_BLOCKS;
+ case MDS_FSOP_SYMLINK:
+ /* Possible new block + block bitmap + GDT for long symlink */
+ nblocks += 3;
case MDS_FSOP_CREATE:
- // FIXME: when we store oa_id in an EA we need more blocks
- // nblocks += 0;
case MDS_FSOP_MKDIR:
- case MDS_FSOP_SYMLINK:
- /* Create new directory or symlink (more data blocks) */
- nblocks += 2;
case MDS_FSOP_MKNOD:
- /* Change parent directory + setattr on new inode */
- nblocks += EXT3_DATA_TRANS_BLOCKS + 3;
+ /* New inode + block bitmap + GDT for new file */
+ nblocks += 3;
+ case MDS_FSOP_LINK:
+ /* Change parent directory */
+ nblocks += EXT3_DATA_TRANS_BLOCKS;
+ break;
+ case MDS_FSOP_SETATTR:
+ /* Setattr on inode */
+ nblocks += 1;
+ break;
+ default: CERROR("unknown transaction start op %d\n", op);
+ LBUG();
}
return journal_start(EXT3_JOURNAL(inode), nblocks);
*/
static int mds_ext3_set_objid(struct inode *inode, void *handle, obd_id id)
{
- (__u64)EXT3_I(inode)->i_data[0] = cpu_to_le64(id);
+ *((__u64 *)EXT3_I(inode)->i_data) = cpu_to_le64(id);
return 0;
}
-static void mds_ext3_get_objid(struct inode *inode, obd_id *id)
+static int mds_ext3_get_objid(struct inode *inode, obd_id *id)
{
- *id = le64_to_cpu(EXT3_I(inode)->i_data[0]);
+ *id = le64_to_cpu(*((__u64 *)EXT3_I(inode)->i_data));
+
+ return 0;
}
static ssize_t mds_ext3_readpage(struct file *file, char *buf, size_t count,
return rc;
}
-struct mds_fs_operations mds_ext3_fs_ops;
-
-void mds_ext3_delete_inode(struct inode *inode)
+static void mds_ext3_delete_inode(struct inode *inode)
{
- void *handle;
-
if (S_ISREG(inode->i_mode)) {
- handle = mds_ext3_start(inode, MDS_FSOP_UNLINK);
+ void *handle = mds_ext3_start(inode, MDS_FSOP_UNLINK);
if (IS_ERR(handle)) {
CERROR("unable to start transaction");
mds_ext3_fs_ops.cl_delete_inode(inode);
}
-int mds_ext3_journal_data(struct inode *inode, struct file *filp)
+
+static void mds_ext3_callback_status(void *jcb, int error)
+{
+ struct mds_cb_data *mcb = (struct mds_cb_data *)jcb;
+
+ CDEBUG(D_EXT2, "got callback for last_rcvd %Ld: rc = %d\n",
+ mcb->cb_last_rcvd, error);
+ if (!error && mcb->cb_last_rcvd > mcb->cb_mds->mds_last_committed)
+ mcb->cb_mds->mds_last_committed = mcb->cb_last_rcvd;
+
+ kmem_cache_free(jcb_cache, mcb);
+ --jcb_cache_count;
+}
+
+#ifdef HAVE_JOURNAL_CALLBACK
+static void mds_ext3_callback_func(void *cb_data)
+{
+ mds_ext3_callback_status(cb_data, 0);
+}
+#endif
+
+static int mds_ext3_set_last_rcvd(struct mds_obd *mds, void *handle)
+{
+ struct mds_cb_data *mcb;
+
+ mcb = kmem_cache_alloc(jcb_cache, GFP_NOFS);
+ if (!mcb)
+ RETURN(-ENOMEM);
+
+ ++jcb_cache_count;
+ mcb->cb_mds = mds;
+ mcb->cb_last_rcvd = mds->mds_last_rcvd;
+
+#ifdef HAVE_JOURNAL_CALLBACK_STATUS
+ CDEBUG(D_EXT2, "set callback for last_rcvd: %Ld\n",
+ (unsigned long long)mcb->cb_last_rcvd);
+ journal_callback_set(handle, mds_ext3_callback_status,
+ (void *)mcb);
+#elif defined(HAVE_JOURNAL_CALLBACK)
+ /* XXX original patch version - remove soon */
+#warning "using old journal callback kernel patch, please update"
+ CDEBUG(D_EXT2, "set callback for last_rcvd: %Ld\n",
+ (unsigned long long)mcb->cb_last_rcvd);
+ journal_callback_set(handle, mds_ext3_callback_func, mcb);
+#else
+#warning "no journal callback kernel patch, faking it..."
+ {
+ static long next = 0;
+
+ if (time_after(jiffies, next)) {
+ CERROR("no journal callback kernel patch, faking it...\n");
+ next = jiffies + 300 * HZ;
+ }
+ }
+ mds_ext3_callback_status((struct journal_callback *)mcb, 0);
+#endif
+
+ return 0;
+}
+
+static int mds_ext3_journal_data(struct file *filp)
{
+ struct inode *inode = filp->f_dentry->d_inode;
+
EXT3_I(inode)->i_flags |= EXT3_JOURNAL_DATA_FL;
return 0;
}
-struct mds_fs_operations mds_ext3_fs_ops = {
+static struct mds_fs_operations mds_ext3_fs_ops = {
fs_start: mds_ext3_start,
fs_commit: mds_ext3_commit,
fs_setattr: mds_ext3_setattr,
fs_delete_inode:mds_ext3_delete_inode,
cl_delete_inode:clear_inode,
fs_journal_data:mds_ext3_journal_data,
+ fs_set_last_rcvd:mds_ext3_set_last_rcvd,
};
+
+static int __init mds_ext3_init(void)
+{
+ int rc;
+
+ jcb_cache = kmem_cache_create("mds_ext3_jcb",
+ sizeof(struct mds_cb_data), 0,
+ 0, NULL, NULL);
+ if (!jcb_cache) {
+ CERROR("error allocating MDS journal callback cache\n");
+ GOTO(out, rc = -ENOMEM);
+ }
+
+ rc = mds_register_fs_type(&mds_ext3_fs_ops, "ext3");
+
+ if (rc)
+ kmem_cache_destroy(jcb_cache);
+out:
+ return rc;
+}
+
+static void __exit mds_ext3_exit(void)
+{
+ int rc = 0;
+
+ mds_unregister_fs_type("ext3");
+ rc = kmem_cache_destroy(jcb_cache);
+
+ if (rc || jcb_cache_count) {
+ CERROR("can't free MDS callback cache: count %d, rc = %d\n",
+ jcb_cache_count, rc);
+ }
+}
+
+MODULE_AUTHOR("Cluster File Systems, Inc. <adilger@clusterfs.com>");
+MODULE_DESCRIPTION("Lustre MDS ext3 Filesystem Helper v0.1");
+MODULE_LICENSE("GPL");
+
+module_init(mds_ext3_init);
+module_exit(mds_ext3_exit);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff