#include <linux/obd_support.h>
#include <linux/lustre_lib.h>
#include <linux/lustre_fsfilt.h>
+#include <portals/list.h>
+
+#include "mds_internal.h"
/* This limit is arbitrary, but for now we fit it in 1 page (32k clients) */
#define MDS_MAX_CLIENTS (PAGE_SIZE * 8)
* we know its offset.
*/
int mds_client_add(struct obd_device *obd, struct mds_obd *mds,
- struct mds_export_data *med, int cl_off)
+ struct mds_export_data *med, int cl_idx)
{
unsigned long *bitmap = mds->mds_client_bitmap;
- int new_client = (cl_off == -1);
+ int new_client = (cl_idx == -1);
LASSERT(bitmap != NULL);
if (!strcmp(med->med_mcd->mcd_uuid, "OBD_CLASS_UUID"))
RETURN(0);
- /* the bitmap operations can handle cl_off > sizeof(long) * 8, so
+ /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
* there's no need for extra complication here
*/
if (new_client) {
- cl_off = find_first_zero_bit(bitmap, MDS_MAX_CLIENTS);
+ cl_idx = find_first_zero_bit(bitmap, MDS_MAX_CLIENTS);
repeat:
- if (cl_off >= MDS_MAX_CLIENTS) {
+ if (cl_idx >= MDS_MAX_CLIENTS) {
CERROR("no room for clients - fix MDS_MAX_CLIENTS\n");
return -ENOMEM;
}
- if (test_and_set_bit(cl_off, bitmap)) {
+ if (test_and_set_bit(cl_idx, bitmap)) {
CERROR("MDS client %d: found bit is set in bitmap\n",
- cl_off);
- cl_off = find_next_zero_bit(bitmap, MDS_MAX_CLIENTS,
- cl_off);
+ cl_idx);
+ cl_idx = find_next_zero_bit(bitmap, MDS_MAX_CLIENTS,
+ cl_idx);
goto repeat;
}
} else {
- if (test_and_set_bit(cl_off, bitmap)) {
+ if (test_and_set_bit(cl_idx, bitmap)) {
CERROR("MDS client %d: bit already set in bitmap!!\n",
- cl_off);
+ cl_idx);
LBUG();
}
}
- CDEBUG(D_INFO, "client at offset %d with UUID '%s' added\n",
- cl_off, med->med_mcd->mcd_uuid);
+ CDEBUG(D_INFO, "client at index %d with UUID '%s' added\n",
+ cl_idx, med->med_mcd->mcd_uuid);
- med->med_off = cl_off;
+ med->med_idx = cl_idx;
+ med->med_off = MDS_LR_CLIENT_START + (cl_idx * MDS_LR_CLIENT_SIZE);
if (new_client) {
struct obd_run_ctxt saved;
- loff_t off = MDS_LR_CLIENT + (cl_off * MDS_LR_SIZE);
+ loff_t off = med->med_off;
ssize_t written;
void *handle;
* could use any of them, or maybe an FSFILT_OP_NONE is best?
*/
handle = fsfilt_start(obd,mds->mds_rcvd_filp->f_dentry->d_inode,
- FSFILT_OP_SETATTR);
+ FSFILT_OP_SETATTR, NULL);
if (IS_ERR(handle)) {
written = PTR_ERR(handle);
CERROR("unable to start transaction: rc %d\n",
(int)written);
} else {
- written = lustre_fwrite(mds->mds_rcvd_filp,med->med_mcd,
- sizeof(*med->med_mcd), &off);
+ written = fsfilt_write_record(obd, mds->mds_rcvd_filp,
+ (char *)med->med_mcd,
+ sizeof(*med->med_mcd),
+ &off);
fsfilt_commit(obd,mds->mds_rcvd_filp->f_dentry->d_inode,
handle, 0);
}
RETURN(written);
RETURN(-EIO);
}
- CDEBUG(D_INFO, "wrote client mcd at off %u (len %u)\n",
- MDS_LR_CLIENT + (cl_off * MDS_LR_SIZE),
+ CDEBUG(D_INFO, "wrote client mcd at idx %u off %llu (len %u)\n",
+ med->med_idx, med->med_off,
(unsigned int)sizeof(*med->med_mcd));
}
return 0;
{
struct mds_export_data *med = &exp->exp_mds_data;
struct mds_obd *mds = &exp->exp_obd->u.mds;
+ struct obd_device *obd = exp->exp_obd;
struct mds_client_data zero_mcd;
struct obd_run_ctxt saved;
int written;
unsigned long *bitmap = mds->mds_client_bitmap;
- loff_t off;
LASSERT(bitmap);
if (!med->med_mcd)
if (!strcmp(med->med_mcd->mcd_uuid, "OBD_CLASS_UUID"))
GOTO(free_and_out, 0);
- off = MDS_LR_CLIENT + (med->med_off * MDS_LR_SIZE);
-
- CDEBUG(D_INFO, "freeing client at offset %u (%lld)with UUID '%s'\n",
- med->med_off, off, med->med_mcd->mcd_uuid);
+ CDEBUG(D_INFO, "freeing client at index %u (%lld)with UUID '%s'\n",
+ med->med_idx, med->med_off, med->med_mcd->mcd_uuid);
- if (!test_and_clear_bit(med->med_off, bitmap)) {
+ if (!test_and_clear_bit(med->med_idx, bitmap)) {
CERROR("MDS client %u: bit already clear in bitmap!!\n",
- med->med_off);
+ med->med_idx);
LBUG();
}
memset(&zero_mcd, 0, sizeof zero_mcd);
push_ctxt(&saved, &mds->mds_ctxt, NULL);
- written = lustre_fwrite(mds->mds_rcvd_filp, (const char *)&zero_mcd,
- sizeof(zero_mcd), &off);
+ written = fsfilt_write_record(obd, mds->mds_rcvd_filp,
+ (char *)&zero_mcd, sizeof(zero_mcd),
+ &med->med_off);
pop_ctxt(&saved, &mds->mds_ctxt, NULL);
if (written != sizeof(zero_mcd)) {
- CERROR("error zeroing out client %s off %d in %s: %d\n",
- med->med_mcd->mcd_uuid, med->med_off, LAST_RCVD,
+ CERROR("error zeroing out client %s index %d in %s: %d\n",
+ med->med_mcd->mcd_uuid, med->med_idx, LAST_RCVD,
written);
} else {
CDEBUG(D_INFO, "zeroed out disconnecting client %s at off %d\n",
- med->med_mcd->mcd_uuid, med->med_off);
+ med->med_mcd->mcd_uuid, med->med_idx);
}
free_and_out:
return 0;
}
-static int mds_read_last_rcvd(struct obd_device *obddev, struct file *f)
+static int mds_read_last_rcvd(struct obd_device *obd, struct file *file)
{
- struct mds_obd *mds = &obddev->u.mds;
+ struct mds_obd *mds = &obd->u.mds;
struct mds_server_data *msd;
struct mds_client_data *mcd = NULL;
loff_t off = 0;
- int cl_off;
- unsigned long last_rcvd_size = f->f_dentry->d_inode->i_size;
+ int cl_idx;
+ unsigned long last_rcvd_size = file->f_dentry->d_inode->i_size;
__u64 last_transno = 0;
- __u64 last_mount;
+ __u64 mount_count;
int rc = 0;
- LASSERT(sizeof(struct mds_client_data) == MDS_LR_SIZE);
- LASSERT(sizeof(struct mds_server_data) <= MDS_LR_CLIENT);
+ LASSERT(sizeof(struct mds_client_data) == MDS_LR_CLIENT_SIZE);
+ LASSERT(sizeof(struct mds_server_data) <= MDS_LR_SERVER_SIZE);
OBD_ALLOC(msd, sizeof(*msd));
if (!msd)
RETURN(-ENOMEM);
}
- rc = lustre_fread(f, (char *)msd, sizeof(*msd), &off);
-
mds->mds_server_data = msd;
- if (rc == 0) {
- CERROR("%s: empty MDS %s, new MDS?\n", obddev->obd_name,
- LAST_RCVD);
+
+ if (last_rcvd_size == 0) {
+ CWARN("%s: initializing new %s\n", obd->obd_name, LAST_RCVD);
+ memcpy(msd->msd_uuid, obd->obd_uuid.uuid,sizeof(msd->msd_uuid));
+ msd->msd_server_size = cpu_to_le32(MDS_LR_SERVER_SIZE);
+ msd->msd_client_start = cpu_to_le32(MDS_LR_CLIENT_START);
+ msd->msd_client_size = cpu_to_le16(MDS_LR_CLIENT_SIZE);
+
RETURN(0);
}
+ rc = fsfilt_read_record(obd, file, (char *)msd, sizeof(*msd), &off);
+
if (rc != sizeof(*msd)) {
- CERROR("error reading MDS %s: rc = %d\n", LAST_RCVD, rc);
+ CERROR("error reading MDS %s: rc = %d\n", LAST_RCVD,rc);
if (rc > 0)
rc = -EIO;
GOTO(err_msd, rc);
}
+ if (!msd->msd_server_size)
+ msd->msd_server_size = cpu_to_le32(MDS_LR_SERVER_SIZE);
+ if (!msd->msd_client_start)
+ msd->msd_client_start = cpu_to_le32(MDS_LR_CLIENT_START);
+ if (!msd->msd_client_size)
+ msd->msd_client_size = cpu_to_le16(MDS_LR_CLIENT_SIZE);
+
+ if (msd->msd_feature_incompat) {
+ CERROR("unsupported incompat feature %x\n",
+ le32_to_cpu(msd->msd_feature_incompat));
+ GOTO(err_msd, rc = -EINVAL);
+ }
+ if (msd->msd_feature_rocompat) {
+ CERROR("unsupported read-only feature %x\n",
+ le32_to_cpu(msd->msd_feature_rocompat));
+ /* Do something like remount filesystem read-only */
+ GOTO(err_msd, rc = -EINVAL);
+ }
- CDEBUG(D_INODE, "last_rcvd has size %lu (msd + %lu clients)\n",
- last_rcvd_size, (last_rcvd_size - MDS_LR_CLIENT)/MDS_LR_SIZE);
-
- /*
- * When we do a clean MDS shutdown, we save the last_transno into
- * the header.
- */
last_transno = le64_to_cpu(msd->msd_last_transno);
mds->mds_last_transno = last_transno;
- CDEBUG(D_INODE, "got "LPU64" for server last_rcvd value\n",
- last_transno);
-
- last_mount = le64_to_cpu(msd->msd_mount_count);
- mds->mds_mount_count = last_mount;
- CDEBUG(D_INODE, "got "LPU64" for server last_mount value\n",last_mount);
- /* off is adjusted by lustre_fread, so we don't adjust it in the loop */
- for (off = MDS_LR_CLIENT, cl_off = 0; off < last_rcvd_size; cl_off++) {
+ mount_count = le64_to_cpu(msd->msd_mount_count);
+ mds->mds_mount_count = mount_count;
+
+ CDEBUG(D_INODE, "%s: server last_transno: "LPU64"\n",
+ obd->obd_name, last_transno);
+ CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
+ obd->obd_name, mount_count);
+ CDEBUG(D_INODE, "%s: server data size: %u\n",
+ obd->obd_name, le32_to_cpu(msd->msd_server_size));
+ CDEBUG(D_INODE, "%s: per-client data start: %u\n",
+ obd->obd_name, le32_to_cpu(msd->msd_client_start));
+ CDEBUG(D_INODE, "%s: per-client data size: %u\n",
+ obd->obd_name, le32_to_cpu(msd->msd_client_size));
+ CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n",
+ obd->obd_name, last_rcvd_size);
+ CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
+ (last_rcvd_size - MDS_LR_CLIENT_START) / MDS_LR_CLIENT_SIZE);
+
+ /* When we do a clean FILTER shutdown, we save the last_transno into
+ * the header. If we find clients with higher last_transno values
+ * then those clients may need recovery done. */
+ for (cl_idx = 0; off < last_rcvd_size; cl_idx++) {
+ __u64 last_transno;
int mount_age;
if (!mcd) {
GOTO(err_msd, rc = -ENOMEM);
}
- rc = lustre_fread(f, (char *)mcd, sizeof(*mcd), &off);
+ /* Don't assume off is incremented properly, in case
+ * sizeof(fsd) isn't the same as fsd->fsd_client_size.
+ */
+ off = le32_to_cpu(msd->msd_client_start) +
+ cl_idx * le16_to_cpu(msd->msd_client_size);
+ rc = fsfilt_read_record(obd, file, (char *)mcd,
+ sizeof(*mcd), &off);
if (rc != sizeof(*mcd)) {
CERROR("error reading MDS %s offset %d: rc = %d\n",
- LAST_RCVD, cl_off, rc);
+ LAST_RCVD, cl_idx, rc);
if (rc > 0) /* XXX fatal error or just abort reading? */
rc = -EIO;
break;
if (mcd->mcd_uuid[0] == '\0') {
CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
- cl_off);
+ cl_idx);
continue;
}
/* These exports are cleaned up by mds_disconnect(), so they
* need to be set up like real exports as mds_connect() does.
*/
- mount_age = last_mount - le64_to_cpu(mcd->mcd_mount_count);
+ mount_age = mount_count - le64_to_cpu(mcd->mcd_mount_count);
if (mount_age < MDS_MOUNT_RECOV) {
- struct obd_export *exp = class_new_export(obddev);
+ struct obd_export *exp = class_new_export(obd);
struct mds_export_data *med;
+ CERROR("RCVRNG CLIENT uuid: %s off: %d lr: "LPU64
+ "srv lr: "LPU64" mnt: "LPU64" last mount: "LPU64
+ "\n", mcd->mcd_uuid, cl_idx,
+ last_transno, le64_to_cpu(msd->msd_last_transno),
+ le64_to_cpu(mcd->mcd_mount_count), mount_count);
if (!exp) {
rc = -ENOMEM;
sizeof exp->exp_client_uuid.uuid);
med = &exp->exp_mds_data;
med->med_mcd = mcd;
- mds_client_add(obddev, mds, med, cl_off);
+ mds_client_add(obd, mds, med, cl_idx);
/* create helper if export init gets more complex */
INIT_LIST_HEAD(&med->med_open_head);
spin_lock_init(&med->med_open_lock);
mcd = NULL;
- obddev->obd_recoverable_clients++;
+ obd->obd_recoverable_clients++;
class_export_put(exp);
} else {
CDEBUG(D_INFO, "discarded client %d, UUID '%s', count "
- LPU64"\n", cl_off, mcd->mcd_uuid,
+ LPU64"\n", cl_idx, mcd->mcd_uuid,
le64_to_cpu(mcd->mcd_mount_count));
}
- CDEBUG(D_OTHER, "client at offset %d has last_transno = %Lu\n",
- cl_off, (unsigned long long)last_transno);
+ CDEBUG(D_OTHER, "client at offset %d has last_transno = "
+ LPU64"\n", cl_idx, last_transno);
if (last_transno > mds->mds_last_transno)
mds->mds_last_transno = last_transno;
}
- obddev->obd_last_committed = mds->mds_last_transno;
- if (obddev->obd_recoverable_clients) {
+ obd->obd_last_committed = mds->mds_last_transno;
+ if (obd->obd_recoverable_clients) {
CERROR("RECOVERY: %d recoverable clients, last_transno "
LPU64"\n",
- obddev->obd_recoverable_clients, mds->mds_last_transno);
- obddev->obd_next_recovery_transno = obddev->obd_last_committed
+ obd->obd_recoverable_clients, mds->mds_last_transno);
+ obd->obd_next_recovery_transno = obd->obd_last_committed
+ 1;
- obddev->obd_recovering = 1;
+ obd->obd_recovering = 1;
}
if (mcd)
return rc;
}
-static int mds_fs_prep(struct obd_device *obddev)
+static int mds_fs_prep(struct obd_device *obd)
{
- struct mds_obd *mds = &obddev->u.mds;
+ struct mds_obd *mds = &obd->u.mds;
struct obd_run_ctxt saved;
struct dentry *dentry;
- struct file *f;
+ struct file *file;
int rc;
push_ctxt(&saved, &mds->mds_ctxt, NULL);
}
mds->mds_fid_de = dentry;
- f = filp_open(LAST_RCVD, O_RDWR | O_CREAT, 0644);
- if (IS_ERR(f)) {
- rc = PTR_ERR(f);
+ dentry = simple_mkdir(current->fs->pwd, "PENDING", 0777);
+ if (IS_ERR(dentry)) {
+ rc = PTR_ERR(dentry);
+ CERROR("cannot create PENDING directory: rc = %d\n", rc);
+ GOTO(err_fid, rc);
+ }
+ mds->mds_pending_dir = dentry;
+
+ dentry = simple_mkdir(current->fs->pwd, "LOGS", 0700);
+ if (IS_ERR(dentry)) {
+ rc = PTR_ERR(dentry);
+ CERROR("cannot create LOGS directory: rc = %d\n", rc);
+ GOTO(err_pending, rc);
+ }
+ mds->mds_logs_dir = dentry;
+
+ file = filp_open(LAST_RCVD, O_RDWR | O_CREAT, 0644);
+ if (IS_ERR(file)) {
+ rc = PTR_ERR(file);
CERROR("cannot open/create %s file: rc = %d\n", LAST_RCVD, rc);
- GOTO(err_pop, rc = PTR_ERR(f));
+
+ GOTO(err_logs, rc = PTR_ERR(file));
}
- if (!S_ISREG(f->f_dentry->d_inode->i_mode)) {
+ if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
CERROR("%s is not a regular file!: mode = %o\n", LAST_RCVD,
- f->f_dentry->d_inode->i_mode);
+ file->f_dentry->d_inode->i_mode);
GOTO(err_filp, rc = -ENOENT);
}
- rc = fsfilt_journal_data(obddev, f);
+ rc = fsfilt_journal_data(obd, file);
if (rc) {
CERROR("cannot journal data on %s: rc = %d\n", LAST_RCVD, rc);
GOTO(err_filp, rc);
}
- rc = mds_read_last_rcvd(obddev, f);
+ rc = mds_read_last_rcvd(obd, file);
if (rc) {
CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc);
GOTO(err_client, rc);
}
- mds->mds_rcvd_filp = f;
+ mds->mds_rcvd_filp = file;
+#ifdef I_SKIP_PDFLUSH
+ /*
+ * we need this to protect from deadlock
+ * pdflush vs. lustre_fwrite()
+ */
+ file->f_dentry->d_inode->i_flags |= I_SKIP_PDFLUSH;
+#endif
err_pop:
pop_ctxt(&saved, &mds->mds_ctxt, NULL);
return rc;
err_client:
- class_disconnect_exports(obddev, 0);
+ class_disconnect_exports(obd, 0);
err_filp:
- if (filp_close(f, 0))
+ if (filp_close(file, 0))
CERROR("can't close %s after error\n", LAST_RCVD);
+err_logs:
+ dput(mds->mds_logs_dir);
+err_pending:
+ dput(mds->mds_pending_dir);
+err_fid:
+ dput(mds->mds_fid_de);
goto err_pop;
}
-int mds_fs_setup(struct obd_device *obddev, struct vfsmount *mnt)
+int mds_fs_setup(struct obd_device *obd, struct vfsmount *mnt)
{
- struct mds_obd *mds = &obddev->u.mds;
+ struct mds_obd *mds = &obd->u.mds;
ENTRY;
mds->mds_vfsmnt = mnt;
mds->mds_ctxt.pwdmnt = mnt;
mds->mds_ctxt.pwd = mnt->mnt_root;
mds->mds_ctxt.fs = get_ds();
- RETURN(mds_fs_prep(obddev));
+ RETURN(mds_fs_prep(obd));
}
-int mds_fs_cleanup(struct obd_device *obddev, int failover)
+int mds_fs_cleanup(struct obd_device *obd, int flags)
{
- struct mds_obd *mds = &obddev->u.mds;
+ struct mds_obd *mds = &obd->u.mds;
struct obd_run_ctxt saved;
int rc = 0;
- if (failover)
+ if (flags & OBD_OPT_FAILOVER)
CERROR("%s: shutting down for failover; client state will"
- " be preserved.\n", obddev->obd_name);
+ " be preserved.\n", obd->obd_name);
- class_disconnect_exports(obddev, failover); /* this cleans up client
- info too */
+ class_disconnect_exports(obd, flags); /* cleans up client info too */
mds_server_free_data(mds);
push_ctxt(&saved, &mds->mds_ctxt, NULL);
rc = filp_close(mds->mds_rcvd_filp, 0);
mds->mds_rcvd_filp = NULL;
if (rc)
- CERROR("last_rcvd file won't close, rc=%d\n", rc);
+ CERROR("%s file won't close, rc=%d\n", LAST_RCVD, rc);
+ }
+ if (mds->mds_logs_dir) {
+ l_dput(mds->mds_logs_dir);
+ mds->mds_logs_dir = NULL;
+ }
+ if (mds->mds_pending_dir) {
+ l_dput(mds->mds_pending_dir);
+ mds->mds_pending_dir = NULL;
}
pop_ctxt(&saved, &mds->mds_ctxt, NULL);
shrink_dcache_parent(mds->mds_fid_de);
return rc;
}
+
+/* This is a callback from the llog_* functions.
+ * Assumes caller has already pushed us into the kernel context. */
+int mds_log_close(struct llog_handle *cathandle, struct llog_handle *loghandle)
+{
+ struct llog_object_hdr *llh = loghandle->lgh_hdr;
+ struct mds_obd *mds = &cathandle->lgh_obd->u.mds;
+ struct dentry *dchild = NULL;
+ int rc;
+ ENTRY;
+
+ /* If we are going to delete this log, grab a ref before we close
+ * it so we don't have to immediately do another lookup.
+ */
+ if (llh->llh_hdr.lth_type != LLOG_CATALOG_MAGIC && llh->llh_count == 0){
+ CDEBUG(D_INODE, "deleting log file "LPX64":%x\n",
+ loghandle->lgh_cookie.lgc_lgl.lgl_oid,
+ loghandle->lgh_cookie.lgc_lgl.lgl_ogen);
+ down(&mds->mds_logs_dir->d_inode->i_sem);
+ dchild = dget(loghandle->lgh_file->f_dentry);
+ llog_delete_log(cathandle, loghandle);
+ } else {
+ CDEBUG(D_INODE, "closing log file "LPX64":%x\n",
+ loghandle->lgh_cookie.lgc_lgl.lgl_oid,
+ loghandle->lgh_cookie.lgc_lgl.lgl_ogen);
+ }
+
+ rc = filp_close(loghandle->lgh_file, 0);
+
+ llog_free_handle(loghandle); /* also removes loghandle from list */
+
+ if (dchild) {
+ int err = vfs_unlink(mds->mds_logs_dir->d_inode, dchild);
+ if (err) {
+ CERROR("error unlinking empty log %*s: rc %d\n",
+ dchild->d_name.len, dchild->d_name.name, err);
+ if (!rc)
+ rc = err;
+ }
+ l_dput(dchild);
+ up(&mds->mds_logs_dir->d_inode->i_sem);
+ }
+ RETURN(rc);
+}
+
+/* This is a callback from the llog_* functions.
+ * Assumes caller has already pushed us into the kernel context. */
+struct llog_handle *mds_log_open(struct obd_device *obd,
+ struct llog_cookie *logcookie)
+{
+ struct ll_fid fid = { .id = logcookie->lgc_lgl.lgl_oid,
+ .generation = logcookie->lgc_lgl.lgl_ogen,
+ .f_type = S_IFREG };
+ struct llog_handle *loghandle;
+ struct dentry *dchild;
+ int rc;
+ ENTRY;
+
+ loghandle = llog_alloc_handle();
+ if (loghandle == NULL)
+ RETURN(ERR_PTR(-ENOMEM));
+
+ down(&obd->u.mds.mds_logs_dir->d_inode->i_sem);
+ dchild = mds_fid2dentry(&obd->u.mds, &fid, NULL);
+ up(&obd->u.mds.mds_logs_dir->d_inode->i_sem);
+ if (IS_ERR(dchild)) {
+ rc = PTR_ERR(dchild);
+ CERROR("error looking up log file "LPX64":%x: rc %d\n",
+ fid.id, fid.generation, rc);
+ GOTO(out, rc);
+ }
+
+ if (dchild->d_inode == NULL) {
+ rc = -ENOENT;
+ CERROR("nonexistent log file "LPX64":%x: rc %d\n",
+ fid.id, fid.generation, rc);
+ GOTO(out_put, rc);
+ }
+
+ /* dentry_open does a dput(de) and mntput(mds->mds_vfsmnt) on error */
+ mntget(obd->u.mds.mds_vfsmnt);
+ loghandle->lgh_file = dentry_open(dchild, obd->u.mds.mds_vfsmnt,
+ O_RDWR | O_LARGEFILE);
+ if (IS_ERR(loghandle->lgh_file)) {
+ rc = PTR_ERR(loghandle->lgh_file);
+ CERROR("error opening logfile "LPX64":%x: rc %d\n",
+ fid.id, fid.generation, rc);
+ GOTO(out, rc);
+ }
+ memcpy(&loghandle->lgh_cookie, logcookie, sizeof(*logcookie));
+ loghandle->lgh_log_create = mds_log_create;
+ loghandle->lgh_log_open = mds_log_open;
+ loghandle->lgh_log_close = mds_log_close;
+ loghandle->lgh_obd = obd;
+
+ RETURN(loghandle);
+
+out_put:
+ l_dput(dchild);
+out:
+ llog_free_handle(loghandle);
+ return ERR_PTR(rc);
+}
+
+/* This is a callback from the llog_* functions.
+ * Assumes caller has already pushed us into the kernel context. */
+struct llog_handle *mds_log_create(struct obd_device *obd)
+{
+ char logbuf[24], *logname; /* logSSSSSSSSSS.count */
+ struct llog_handle *loghandle;
+ int rc, open_flags = O_RDWR | O_CREAT | O_LARGEFILE;
+ ENTRY;
+
+ loghandle = llog_alloc_handle();
+ if (!loghandle)
+ RETURN(ERR_PTR(-ENOMEM));
+
+retry:
+ if (!obd->u.mds.mds_catalog) {
+ logname = "LOGS/catalog";
+ } else {
+ sprintf(logbuf, "LOGS/log%lu.%u\n",
+ CURRENT_SECONDS, obd->u.mds.mds_catalog->lgh_index++);
+ open_flags |= O_EXCL;
+ logname = logbuf;
+ }
+ loghandle->lgh_file = filp_open(logname, open_flags, 0644);
+ if (IS_ERR(loghandle->lgh_file)) {
+ rc = PTR_ERR(loghandle->lgh_file);
+ if (rc == -EEXIST) {
+ CDEBUG(D_HA, "collision in logfile %s creation\n",
+ logname);
+ obd->u.mds.mds_catalog->lgh_index++;
+ goto retry;
+ }
+ CERROR("error opening/creating %s: rc %d\n", logname, rc);
+ GOTO(out_handle, rc);
+ }
+
+ loghandle->lgh_cookie.lgc_lgl.lgl_oid =
+ loghandle->lgh_file->f_dentry->d_inode->i_ino;
+ loghandle->lgh_cookie.lgc_lgl.lgl_ogen =
+ loghandle->lgh_file->f_dentry->d_inode->i_generation;
+ loghandle->lgh_log_create = mds_log_create;
+ loghandle->lgh_log_open = mds_log_open;
+ loghandle->lgh_log_close = mds_log_close;
+ loghandle->lgh_obd = obd;
+
+ RETURN(loghandle);
+
+out_handle:
+ llog_free_handle(loghandle);
+ return ERR_PTR(rc);
+}
+
+struct llog_handle *mds_get_catalog(struct obd_device *obd)
+{
+ struct mds_server_data *msd = obd->u.mds.mds_server_data;
+ struct obd_run_ctxt saved;
+ struct llog_handle *cathandle = NULL;
+ int rc = 0;
+ ENTRY;
+
+ push_ctxt(&saved, &obd->u.mds.mds_ctxt, NULL);
+
+ if (msd->msd_catalog_oid) {
+ struct llog_cookie catcookie;
+
+ catcookie.lgc_lgl.lgl_oid = le64_to_cpu(msd->msd_catalog_oid);
+ catcookie.lgc_lgl.lgl_ogen = le32_to_cpu(msd->msd_catalog_ogen);
+ cathandle = mds_log_open(obd, &catcookie);
+ if (IS_ERR(cathandle)) {
+ CERROR("error opening catalog "LPX64":%x: rc %d\n",
+ catcookie.lgc_lgl.lgl_oid,
+ catcookie.lgc_lgl.lgl_ogen,
+ (int)PTR_ERR(cathandle));
+ msd->msd_catalog_oid = 0;
+ msd->msd_catalog_ogen = 0;
+ }
+ /* ORPHANS FIXME: compare catalog UUID to msd_peeruuid */
+ }
+
+ if (!msd->msd_catalog_oid) {
+ struct llog_logid *lgl;
+
+ cathandle = mds_log_create(obd);
+ if (IS_ERR(cathandle)) {
+ CERROR("error creating new catalog: rc %d\n",
+ (int)PTR_ERR(cathandle));
+ GOTO(out, cathandle);
+ }
+ lgl = &cathandle->lgh_cookie.lgc_lgl;
+ msd->msd_catalog_oid = cpu_to_le64(lgl->lgl_oid);
+ msd->msd_catalog_ogen = cpu_to_le32(lgl->lgl_ogen);
+ rc = mds_update_server_data(obd);
+ if (rc) {
+ CERROR("error writing new catalog to disk: rc %d\n",rc);
+ GOTO(out_handle, rc);
+ }
+ }
+
+ rc = llog_init_catalog(cathandle, &obd->u.mds.mds_osc_uuid);
+
+out:
+ pop_ctxt(&saved, &obd->u.mds.mds_ctxt, NULL);
+ RETURN(cathandle);
+
+out_handle:
+ mds_log_close(cathandle, cathandle);
+ cathandle = ERR_PTR(rc);
+ goto out;
+
+}
+
+void mds_put_catalog(struct llog_handle *cathandle)
+{
+ struct llog_handle *loghandle, *n;
+ int rc;
+ ENTRY;
+
+ list_for_each_entry_safe(loghandle, n, &cathandle->lgh_list, lgh_list)
+ mds_log_close(cathandle, loghandle);
+
+ rc = filp_close(cathandle->lgh_file, 0);
+ if (rc)
+ CERROR("error closing catalog: rc %d\n", rc);
+
+ llog_free_handle(cathandle);
+ EXIT;
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff