From eca3d26005c16ba7b7cd74d17ad51f94ac7c482f Mon Sep 17 00:00:00 2001 From: Liu Xuezhao Date: Mon, 17 Dec 2012 23:31:26 +0800 Subject: [PATCH] LU-1330 obdclass: split client-server mount routines Move server side mount routines to obd_mount_server.c. Const correct several server_name2xxx type functions. Signed-off-by: Liu Xuezhao Signed-off-by: John L. Hammond Change-Id: I8abdb6fdd0411f2e75f6fb6ee4ff8502e50ef213 Reviewed-on: http://review.whamcloud.com/2672 Tested-by: Hudson Reviewed-by: Nathaniel Clark Tested-by: Maloo Reviewed-by: Peng Tao Reviewed-by: Oleg Drokin --- lustre/doc/Makefile.am | 6 +- lustre/include/lustre_disk.h | 36 +- lustre/include/obd_class.h | 7 +- lustre/mgs/mgs_llog.c | 13 +- lustre/obdclass/Makefile.in | 2 + lustre/obdclass/lprocfs_status.c | 2 + lustre/obdclass/obd_mount.c | 2099 ++++-------------------------------- lustre/obdclass/obd_mount_server.c | 1785 ++++++++++++++++++++++++++++++ 8 files changed, 2011 insertions(+), 1939 deletions(-) create mode 100644 lustre/obdclass/obd_mount_server.c diff --git a/lustre/doc/Makefile.am b/lustre/doc/Makefile.am index 475aabc..6511ea7 100644 --- a/lustre/doc/Makefile.am +++ b/lustre/doc/Makefile.am @@ -48,7 +48,7 @@ PS2PDF = ps2pdf TEXEXPAND = texexpand SUFFIXES = .lin .lyx .pdf .ps .sgml .html .txt .tex .fig .eps .dvi -MANFILES = lustre.7 lfs.1 mount.lustre.8 mkfs.lustre.8 tunefs.lustre.8 lctl.8 \ +MANFILES = lustre.7 lfs.1 mount.lustre.8 lctl.8 \ llverdev.8 llbackup.8 llapi_quotactl.3 llobdstat.8 llstat.8 \ plot-llstat.8 l_getgroups.8 lst.8 routerstat.8 lshowmount.8 \ ll_recover_lost_found_objs.8 llog_reader.8 llapi_file_open.3 \ @@ -56,6 +56,10 @@ MANFILES = lustre.7 lfs.1 mount.lustre.8 mkfs.lustre.8 tunefs.lustre.8 lctl.8 \ lustre_rsync.8 lfs_migrate.1 lhbadm.8 ldev.8 ldev.conf.5 nids.5 \ lfs-hsm.1 llapi_hsm_state_get.3 llapi_hsm_state_set.3 +if SERVER +MANFILES += mkfs.lustre.8 tunefs.lustre.8 +endif + if UTILS man_MANS = $(MANFILES) endif diff --git a/lustre/include/lustre_disk.h b/lustre/include/lustre_disk.h index b1c030a..819513f 100644 --- a/lustre/include/lustre_disk.h +++ b/lustre/include/lustre_disk.h @@ -172,12 +172,13 @@ struct lustre_disk_data { /*8192*/char ldd_params[4096]; /* key=value pairs */ }; + #define IS_MDT(data) ((data)->lsi_flags & LDD_F_SV_TYPE_MDT) #define IS_OST(data) ((data)->lsi_flags & LDD_F_SV_TYPE_OST) #define IS_MGS(data) ((data)->lsi_flags & LDD_F_SV_TYPE_MGS) #define IS_SERVER(data) ((data)->lsi_flags & (LDD_F_SV_TYPE_MGS | \ - LDD_F_SV_TYPE_MDT | LDD_F_SV_TYPE_OST)) -#define MT_STR(data) mt_str((data)->ldd_mount_type) + LDD_F_SV_TYPE_MDT | LDD_F_SV_TYPE_OST)) +#define MT_STR(data) mt_str((data)->ldd_mount_type) /* Make the mdt/ost server obd name based on the filesystem name */ static inline int server_make_name(__u32 flags, __u16 index, char *fs, @@ -199,11 +200,6 @@ static inline int server_make_name(__u32 flags, __u16 index, char *fs, return 0; } -/* Get the index from the obd name */ -int server_name2index(char *svname, __u32 *idx, char **endptr); -int server_name2svname(char *label, char *svname, char **endptr, size_t svsize); - - /****************** mount command *********************/ /* The lmd is only used internally by Lustre; mount simply passes @@ -536,27 +532,35 @@ struct los_ondisk { /****************** prototypes *********************/ #ifdef __KERNEL__ - /* obd_mount.c */ +int server_name2fsname(const char *svname, char *fsname, const char **endptr); +int server_name2index(const char *svname, __u32 *idx, const char **endptr); +int server_name2svname(const char *label, char *svname, const char **endptr, + size_t svsize); + +int lustre_put_lsi(struct super_block *sb); +int lustre_start_simple(char *obdname, char *type, char *uuid, + char *s1, char *s2, char *s3, char *s4); +int lustre_start_mgc(struct super_block *sb); void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb, - struct vfsmount *mnt)); + struct vfsmount *mnt)); void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb)); - - int lustre_common_put_super(struct super_block *sb); -struct lustre_mount_info *server_find_mount_locked(const char *name); + +# ifdef HAVE_SERVER_SUPPORT +/* obd_mount_server.c */ +int server_fill_super(struct super_block *sb); struct lustre_mount_info *server_get_mount(const char *name); struct lustre_mount_info *server_get_mount_2(const char *name); int server_put_mount(const char *name, struct vfsmount *mnt); int server_put_mount_2(const char *name, struct vfsmount *mnt); struct mgs_target_info; -int server_mti_print(char *title, struct mgs_target_info *mti); +int server_mti_print(const char *title, struct mgs_target_info *mti); void server_calc_timeout(struct lustre_sb_info *lsi, struct obd_device *obd); +# endif -/* mgc_request.c */ int mgc_fsname2resid(char *fsname, struct ldlm_res_id *res_id, int type); - -#endif +#endif /* __KERNEL__ */ /** @} disk */ diff --git a/lustre/include/obd_class.h b/lustre/include/obd_class.h index 575955d..ec00115 100644 --- a/lustre/include/obd_class.h +++ b/lustre/include/obd_class.h @@ -2279,11 +2279,12 @@ struct lwp_register_item { extern int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c); /* obd_mount.c */ -int server_name2fsname(char *svname, char *fsname, char **endptr); -int lustre_register_lwp_item(char *lwpname, struct obd_export **exp, +#ifdef HAVE_SERVER_SUPPORT +int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp, register_lwp_cb cb_func, void *cb_data); void lustre_deregister_lwp_item(struct obd_export **exp); -int tgt_name2lwpname(char *tgt_name, char *lwp_name); +int tgt_name2lwpname(const char *tgt_name, char *lwp_name); +#endif /* HAVE_SERVER_SUPPORT */ /* sysctl.c */ extern void obd_sysctl_init (void); diff --git a/lustre/mgs/mgs_llog.c b/lustre/mgs/mgs_llog.c index 99a58c5..5e9a9fd 100644 --- a/lustre/mgs/mgs_llog.c +++ b/lustre/mgs/mgs_llog.c @@ -3790,13 +3790,14 @@ static void print_lustre_cfg(struct lustre_cfg *lcfg) int mgs_setparam(const struct lu_env *env, struct mgs_device *mgs, struct lustre_cfg *lcfg, char *fsname) { - struct fs_db *fsdb; - struct mgs_target_info *mti; + struct fs_db *fsdb; + struct mgs_target_info *mti; char *devname, *param; - char *ptr, *tmp; - __u32 index; - int rc = 0; - ENTRY; + char *ptr; + const char *tmp; + __u32 index; + int rc = 0; + ENTRY; print_lustre_cfg(lcfg); diff --git a/lustre/obdclass/Makefile.in b/lustre/obdclass/Makefile.in index c3e1507..d67d3dc 100644 --- a/lustre/obdclass/Makefile.in +++ b/lustre/obdclass/Makefile.in @@ -19,6 +19,8 @@ obdclass-all-objs += acl.o idmap.o obdclass-all-objs += md_local_object.o md_attrs.o linkea.o obdclass-all-objs += lu_ucred.o +@SERVER_TRUE@obdclass-all-objs += obd_mount_server.o + obdclass-objs := $(obdclass-linux-objs) $(obdclass-all-objs) EXTRA_PRE_CFLAGS := -I@LINUX@/fs -I@LDISKFS_DIR@ -I@LDISKFS_DIR@/ldiskfs diff --git a/lustre/obdclass/lprocfs_status.c b/lustre/obdclass/lprocfs_status.c index 117eb50..a966ed3 100644 --- a/lustre/obdclass/lprocfs_status.c +++ b/lustre/obdclass/lprocfs_status.c @@ -2681,6 +2681,7 @@ int lprocfs_obd_wr_recovery_time_hard(struct file *file, const char *buffer, } EXPORT_SYMBOL(lprocfs_obd_wr_recovery_time_hard); +#ifdef HAVE_SERVER_SUPPORT int lprocfs_obd_rd_mntdev(char *page, char **start, off_t off, int count, int *eof, void *data) { @@ -2697,6 +2698,7 @@ int lprocfs_obd_rd_mntdev(char *page, char **start, off_t off, return snprintf(page, count, "%s\n", dev_name); } EXPORT_SYMBOL(lprocfs_obd_rd_mntdev); +#endif int lprocfs_obd_rd_max_pages_per_rpc(char *page, char **start, off_t off, int count, int *eof, void *data) diff --git a/lustre/obdclass/obd_mount.c b/lustre/obdclass/obd_mount.c index d6b4662..6cb33aa 100644 --- a/lustre/obdclass/obd_mount.c +++ b/lustre/obdclass/obd_mount.c @@ -35,16 +35,15 @@ * * lustre/obdclass/obd_mount.c * - * Client/server mount routines + * Client mount routines * * Author: Nathan Rutman */ #define DEBUG_SUBSYSTEM S_CLASS -#define D_MOUNT D_SUPER|D_CONFIG /*|D_WARNING */ +#define D_MOUNT (D_SUPER|D_CONFIG/*|D_WARNING */) #define PRINT_CMD CDEBUG -#define PRINT_MASK D_SUPER|D_CONFIG #include #include @@ -55,187 +54,11 @@ #include #include #include -#ifdef HAVE_KERNEL_LOCKED -#include -#endif static int (*client_fill_super)(struct super_block *sb, - struct vfsmount *mnt) = NULL; -static void (*kill_super_cb)(struct super_block *sb) = NULL; - -/*********** mount lookup *********/ - -DEFINE_MUTEX(lustre_mount_info_lock); -static CFS_LIST_HEAD(server_mount_info_list); - -static struct lustre_mount_info *server_find_mount(const char *name) -{ - cfs_list_t *tmp; - struct lustre_mount_info *lmi; - ENTRY; - - cfs_list_for_each(tmp, &server_mount_info_list) { - lmi = cfs_list_entry(tmp, struct lustre_mount_info, - lmi_list_chain); - if (strcmp(name, lmi->lmi_name) == 0) - RETURN(lmi); - } - RETURN(NULL); -} - -/* we must register an obd for a mount before we call the setup routine. - *_setup will call lustre_get_mount to get the mnt struct - by obd_name, since we can't pass the pointer to setup. */ -static int server_register_mount(const char *name, struct super_block *sb, - struct vfsmount *mnt) -{ - struct lustre_mount_info *lmi; - char *name_cp; - ENTRY; - - LASSERT(sb); - - OBD_ALLOC(lmi, sizeof(*lmi)); - if (!lmi) - RETURN(-ENOMEM); - OBD_ALLOC(name_cp, strlen(name) + 1); - if (!name_cp) { - OBD_FREE(lmi, sizeof(*lmi)); - RETURN(-ENOMEM); - } - strcpy(name_cp, name); - - mutex_lock(&lustre_mount_info_lock); - - if (server_find_mount(name)) { - mutex_unlock(&lustre_mount_info_lock); - OBD_FREE(lmi, sizeof(*lmi)); - OBD_FREE(name_cp, strlen(name) + 1); - CERROR("Already registered %s\n", name); - RETURN(-EEXIST); - } - lmi->lmi_name = name_cp; - lmi->lmi_sb = sb; - lmi->lmi_mnt = mnt; - cfs_list_add(&lmi->lmi_list_chain, &server_mount_info_list); - - mutex_unlock(&lustre_mount_info_lock); - - CDEBUG(D_MOUNT, "reg_mnt %p from %s\n", lmi->lmi_mnt, name); - - RETURN(0); -} - -/* when an obd no longer needs a mount */ -static int server_deregister_mount(const char *name) -{ - struct lustre_mount_info *lmi; - ENTRY; - - mutex_lock(&lustre_mount_info_lock); - lmi = server_find_mount(name); - if (!lmi) { - mutex_unlock(&lustre_mount_info_lock); - CERROR("%s not registered\n", name); - RETURN(-ENOENT); - } - - CDEBUG(D_MOUNT, "dereg_mnt %p from %s\n", lmi->lmi_mnt, name); - - OBD_FREE(lmi->lmi_name, strlen(lmi->lmi_name) + 1); - cfs_list_del(&lmi->lmi_list_chain); - OBD_FREE(lmi, sizeof(*lmi)); - mutex_unlock(&lustre_mount_info_lock); - - RETURN(0); -} - -/* obd's look up a registered mount using their obdname. This is just - for initial obd setup to find the mount struct. It should not be - called every time you want to mntget. */ -struct lustre_mount_info *server_get_mount(const char *name) -{ - struct lustre_mount_info *lmi; - struct lustre_sb_info *lsi; - ENTRY; - - mutex_lock(&lustre_mount_info_lock); - lmi = server_find_mount(name); - mutex_unlock(&lustre_mount_info_lock); - if (!lmi) { - CERROR("Can't find mount for %s\n", name); - RETURN(NULL); - } - lsi = s2lsi(lmi->lmi_sb); - - cfs_atomic_inc(&lsi->lsi_mounts); - - CDEBUG(D_MOUNT, "get_mnt %p from %s, refs=%d\n", lmi->lmi_mnt, - name, cfs_atomic_read(&lsi->lsi_mounts)); - - RETURN(lmi); -} -EXPORT_SYMBOL(server_get_mount); - -/* - * Used by mdt to get mount_info from obdname. - * There are no blocking when using the mount_info. - * Do not use server_get_mount for this purpose. - */ -struct lustre_mount_info *server_get_mount_2(const char *name) -{ - struct lustre_mount_info *lmi; - ENTRY; - - mutex_lock(&lustre_mount_info_lock); - lmi = server_find_mount(name); - mutex_unlock(&lustre_mount_info_lock); - if (!lmi) - CERROR("Can't find mount for %s\n", name); - - RETURN(lmi); -} -EXPORT_SYMBOL(server_get_mount_2); - -static int lustre_put_lsi(struct super_block *sb); - -/* to be called from obd_cleanup methods */ -int server_put_mount(const char *name, struct vfsmount *mnt) -{ - struct lustre_mount_info *lmi; - struct lustre_sb_info *lsi; - ENTRY; - - mutex_lock(&lustre_mount_info_lock); - lmi = server_find_mount(name); - mutex_unlock(&lustre_mount_info_lock); - if (!lmi) { - CERROR("Can't find mount for %s\n", name); - RETURN(-ENOENT); - } - lsi = s2lsi(lmi->lmi_sb); - - CDEBUG(D_MOUNT, "put_mnt %p from %s, refs=%d\n", - lmi->lmi_mnt, name, cfs_atomic_read(&lsi->lsi_mounts)); + struct vfsmount *mnt); - if (lustre_put_lsi(lmi->lmi_sb)) - CDEBUG(D_MOUNT, "Last put of mnt %p from %s\n", - lmi->lmi_mnt, name); - - /* this obd should never need the mount again */ - server_deregister_mount(name); - - RETURN(0); -} -EXPORT_SYMBOL(server_put_mount); - -/* Corresponding to server_get_mount_2 */ -int server_put_mount_2(const char *name, struct vfsmount *mnt) -{ - ENTRY; - RETURN(0); -} -EXPORT_SYMBOL(server_put_mount_2); +static void (*kill_super_cb)(struct super_block *sb); /**************** config llog ********************/ @@ -362,8 +185,8 @@ EXPORT_SYMBOL(do_lcfg); /** Call class_attach and class_setup. These methods in turn call * obd type-specific methods. */ -static int lustre_start_simple(char *obdname, char *type, char *uuid, - char *s1, char *s2, char *s3, char *s4) +int lustre_start_simple(char *obdname, char *type, char *uuid, + char *s1, char *s2, char *s3, char *s4) { int rc; CDEBUG(D_MOUNT, "Starting obd %s (typ=%s)\n", obdname, type); @@ -371,7 +194,7 @@ static int lustre_start_simple(char *obdname, char *type, char *uuid, rc = do_lcfg(obdname, 0, LCFG_ATTACH, type, uuid, 0, 0); if (rc) { CERROR("%s attach error %d\n", obdname, rc); - return(rc); + return rc; } rc = do_lcfg(obdname, 0, LCFG_SETUP, s1, s2, s3, s4); if (rc) { @@ -381,66 +204,6 @@ static int lustre_start_simple(char *obdname, char *type, char *uuid, return rc; } -/* Set up a MGS to serve startup logs */ -static int server_start_mgs(struct super_block *sb) -{ - struct lustre_sb_info *lsi = s2lsi(sb); - struct vfsmount *mnt = lsi->lsi_srv_mnt; - struct lustre_mount_info *lmi; - int rc = 0; - ENTRY; - - /* It is impossible to have more than 1 MGS per node, since - MGC wouldn't know which to connect to */ - lmi = server_find_mount(LUSTRE_MGS_OBDNAME); - if (lmi) { - lsi = s2lsi(lmi->lmi_sb); - LCONSOLE_ERROR_MSG(0x15d, "The MGS service was already started" - " from server\n"); - RETURN(-EALREADY); - } - - CDEBUG(D_CONFIG, "Start MGS service %s\n", LUSTRE_MGS_OBDNAME); - - rc = server_register_mount(LUSTRE_MGS_OBDNAME, sb, mnt); - - if (!rc) { - rc = lustre_start_simple(LUSTRE_MGS_OBDNAME, LUSTRE_MGS_NAME, - LUSTRE_MGS_OBDNAME, 0, 0, - lsi->lsi_osd_obdname, 0); - /* Do NOT call server_deregister_mount() here. This leads to - * inability cleanup cleanly and free lsi and other stuff when - * mgs calls server_put_mount() in error handling case. -umka */ - } - - if (rc) - LCONSOLE_ERROR_MSG(0x15e, "Failed to start MGS '%s' (%d). " - "Is the 'mgs' module loaded?\n", - LUSTRE_MGS_OBDNAME, rc); - RETURN(rc); -} - -static int server_stop_mgs(struct super_block *sb) -{ - struct obd_device *obd; - int rc; - ENTRY; - - CDEBUG(D_MOUNT, "Stop MGS service %s\n", LUSTRE_MGS_OBDNAME); - - /* There better be only one MGS */ - obd = class_name2obd(LUSTRE_MGS_OBDNAME); - if (!obd) { - CDEBUG(D_CONFIG, "mgs %s not running\n", LUSTRE_MGS_OBDNAME); - RETURN(-EALREADY); - } - - /* The MGS should always stop when we say so */ - obd->obd_force = 1; - rc = class_manual_cleanup(obd); - RETURN(rc); -} - DEFINE_MUTEX(mgc_start_lock); /** Set up a mgc obd to process startup logs @@ -449,7 +212,7 @@ DEFINE_MUTEX(mgc_start_lock); * * \retval 0 success, otherwise error code */ -static int lustre_start_mgc(struct super_block *sb) +int lustre_start_mgc(struct super_block *sb) { struct obd_connect_data *data = NULL; struct lustre_sb_info *lsi = s2lsi(sb); @@ -622,7 +385,7 @@ static int lustre_start_mgc(struct super_block *sb) /* Start the MGC */ rc = lustre_start_simple(mgcname, LUSTRE_MGC_NAME, - (char *)uuid->uuid, LUSTRE_MGS_OBDNAME, + (char *)uuid->uuid, LUSTRE_MGS_OBDNAME, niduuid, 0, 0); OBD_FREE_PTR(uuid); if (rc) @@ -710,1209 +473,82 @@ out_free: mutex_unlock(&mgc_start_lock); if (data) - OBD_FREE_PTR(data); - if (mgcname) - OBD_FREE(mgcname, len); - if (niduuid) - OBD_FREE(niduuid, len + 2); - RETURN(rc); -} - -static int lustre_stop_mgc(struct super_block *sb) -{ - struct lustre_sb_info *lsi = s2lsi(sb); - struct obd_device *obd; - char *niduuid = 0, *ptr = 0; - int i, rc = 0, len = 0; - ENTRY; - - if (!lsi) - RETURN(-ENOENT); - obd = lsi->lsi_mgc; - if (!obd) - RETURN(-ENOENT); - lsi->lsi_mgc = NULL; - - mutex_lock(&mgc_start_lock); - LASSERT(cfs_atomic_read(&obd->u.cli.cl_mgc_refcount) > 0); - if (!cfs_atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) { - /* This is not fatal, every client that stops - will call in here. */ - CDEBUG(D_MOUNT, "mgc still has %d references.\n", - cfs_atomic_read(&obd->u.cli.cl_mgc_refcount)); - GOTO(out, rc = -EBUSY); - } - - /* The MGC has no recoverable data in any case. - * force shotdown set in umount_begin */ - obd->obd_no_recov = 1; - - if (obd->u.cli.cl_mgc_mgsexp) { - /* An error is not fatal, if we are unable to send the - disconnect mgs ping evictor cleans up the export */ - rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp); - if (rc) - CDEBUG(D_MOUNT, "disconnect failed %d\n", rc); - } - - /* Save the obdname for cleaning the nid uuids, which are - obdname_XX */ - len = strlen(obd->obd_name) + 6; - OBD_ALLOC(niduuid, len); - if (niduuid) { - strcpy(niduuid, obd->obd_name); - ptr = niduuid + strlen(niduuid); - } - - rc = class_manual_cleanup(obd); - if (rc) - GOTO(out, rc); - - /* Clean the nid uuids */ - if (!niduuid) - GOTO(out, rc = -ENOMEM); - - for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) { - sprintf(ptr, "_%x", i); - rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID, - niduuid, 0, 0, 0); - if (rc) - CERROR("del MDC UUID %s failed: rc = %d\n", - niduuid, rc); - } -out: - if (niduuid) - OBD_FREE(niduuid, len); - - /* class_import_put will get rid of the additional connections */ - mutex_unlock(&mgc_start_lock); - RETURN(rc); -} - -/* Since there's only one mgc per node, we have to change it's fs to get - access to the right disk. */ -static int server_mgc_set_fs(struct obd_device *mgc, struct super_block *sb) -{ - struct lustre_sb_info *lsi = s2lsi(sb); - int rc; - ENTRY; - - CDEBUG(D_MOUNT, "Set mgc disk for %s\n", lsi->lsi_lmd->lmd_dev); - - /* cl_mgc_sem in mgc insures we sleep if the mgc_fs is busy */ - rc = obd_set_info_async(NULL, mgc->obd_self_export, - sizeof(KEY_SET_FS), KEY_SET_FS, - sizeof(*sb), sb, NULL); - if (rc) { - CERROR("can't set_fs %d\n", rc); - } - - RETURN(rc); -} - -static int server_mgc_clear_fs(struct obd_device *mgc) -{ - int rc; - ENTRY; - - CDEBUG(D_MOUNT, "Unassign mgc disk\n"); - - rc = obd_set_info_async(NULL, mgc->obd_self_export, - sizeof(KEY_CLEAR_FS), KEY_CLEAR_FS, - 0, NULL, NULL); - RETURN(rc); -} - -/** Get the fsname ("lustre") from the server name ("lustre-OST003F"). - * @param [in] svname server name including type and index - * @param [out] fsname Buffer to copy filesystem name prefix into. - * Must have at least 'strlen(fsname) + 1' chars. - * @param [out] endptr if endptr isn't NULL it is set to end of fsname - * rc < 0 on error - */ -int server_name2fsname(char *svname, char *fsname, char **endptr) -{ - char *dash = strrchr(svname, '-'); - if (!dash) { - dash = strrchr(svname, ':'); - if (!dash) - return -EINVAL; - } - - /* interpret -MDTXXXXX-mdc as mdt, the better way is to pass - * in the fsname, then determine the server index */ - if (!strcmp(LUSTRE_MDC_NAME, dash + 1)) { - dash--; - for (; dash > svname && *dash != '-' && *dash != ':'; dash--) - ; - if (dash == svname) - return -EINVAL; - } - - if (fsname != NULL) { - strncpy(fsname, svname, dash - svname); - fsname[dash - svname] = '\0'; - } - - if (endptr != NULL) - *endptr = dash; - - return 0; -} -EXPORT_SYMBOL(server_name2fsname); - -static int is_mdc_device(char *devname) -{ - char *ptr; - ptr = strrchr(devname, '-'); - if (ptr != NULL && strcmp(ptr, "-mdc") == 0) - return 1; - return 0; -} - -static int inline tgt_is_mdt0(char *tgtname) -{ - __u32 idx; - int type; - - type = server_name2index(tgtname, &idx, NULL); - if (type != LDD_F_SV_TYPE_MDT) - return 0; - - return (idx == 0) ? 1 :0; -} - -static int inline is_mdc_for_mdt0(char *devname) -{ - char *ptr; - - if (!is_mdc_device(devname)) - return 0; - - ptr = strrchr(devname, '-'); - if (ptr == NULL) - return 0; - - *ptr = 0; - if (tgt_is_mdt0(devname)) { - *ptr = '-'; - return 1; - } - *ptr = '-'; - return 0; -} - -/** - * Convert OST/MDT name(fsname-OSTxxxx) to a lwp name - * (fsname-MDT0000-lwp-OSTxxxx) - **/ -int tgt_name2lwpname(char *svname, char *lwpname) -{ - char *fsname, *tgt; - int rc; - ENTRY; - - OBD_ALLOC(fsname, MTI_NAME_MAXLEN); - if (fsname == NULL) - RETURN(-ENOMEM); - - rc = server_name2fsname(svname, fsname, &tgt); - if (rc != 0) { - CERROR("%s: failed to get fsname from svname. %d\n", - svname, rc); - GOTO(cleanup, rc); - } - - if (*tgt != '-' && *tgt != ':') { - CERROR("%s: invalid svname name!\n", svname); - GOTO(cleanup, rc = -EINVAL); - } - - tgt++; - if (strncmp(tgt, "OST", 3) != 0 && strncmp(tgt, "MDT", 3) != 0) { - CERROR("%s is not an OST or MDT target!\n", svname); - GOTO(cleanup, rc = -EINVAL); - } - sprintf(lwpname, "%s-MDT0000-%s-%s", fsname, LUSTRE_LWP_NAME, tgt); -cleanup: - if (fsname != NULL) - OBD_FREE(fsname, MTI_NAME_MAXLEN); - RETURN(rc); -} -EXPORT_SYMBOL(tgt_name2lwpname); - -static CFS_LIST_HEAD(lwp_register_list); -DEFINE_MUTEX(lwp_register_list_lock); - -int lustre_register_lwp_item(char *lwpname, struct obd_export **exp, - register_lwp_cb cb_func, void *cb_data) -{ - struct obd_device *lwp; - struct lwp_register_item *lri; - ENTRY; - - LASSERTF(strlen(lwpname) < MTI_NAME_MAXLEN, "lwpname is too long %s\n", - lwpname); - LASSERT(exp != NULL && *exp == NULL); - - OBD_ALLOC_PTR(lri); - if (lri == NULL) - RETURN(-ENOMEM); - - mutex_lock(&lwp_register_list_lock); - - lwp = class_name2obd(lwpname); - if (lwp != NULL && lwp->obd_set_up == 1) { - struct obd_uuid *uuid; - - OBD_ALLOC_PTR(uuid); - if (uuid == NULL) { - mutex_unlock(&lwp_register_list_lock); - OBD_FREE_PTR(lri); - RETURN(-ENOMEM); - } - memcpy(uuid->uuid, lwpname, strlen(lwpname)); - *exp = cfs_hash_lookup(lwp->obd_uuid_hash, uuid); - OBD_FREE_PTR(uuid); - } - - memcpy(lri->lri_name, lwpname, strlen(lwpname)); - lri->lri_exp = exp; - lri->lri_cb_func = cb_func; - lri->lri_cb_data = cb_data; - CFS_INIT_LIST_HEAD(&lri->lri_list); - cfs_list_add(&lri->lri_list, &lwp_register_list); - - if (*exp != NULL && cb_func != NULL) - cb_func(cb_data); - - mutex_unlock(&lwp_register_list_lock); - RETURN(0); -} -EXPORT_SYMBOL(lustre_register_lwp_item); - -void lustre_deregister_lwp_item(struct obd_export **exp) -{ - struct lwp_register_item *lri, *tmp; - - mutex_lock(&lwp_register_list_lock); - cfs_list_for_each_entry_safe(lri, tmp, &lwp_register_list, lri_list) { - if (exp == lri->lri_exp) { - if (*exp) - class_export_put(*exp); - cfs_list_del(&lri->lri_list); - OBD_FREE_PTR(lri); - break; - } - } - mutex_unlock(&lwp_register_list_lock); -} -EXPORT_SYMBOL(lustre_deregister_lwp_item); - -static void lustre_notify_lwp_list(struct obd_export *exp) -{ - struct lwp_register_item *lri, *tmp; - LASSERT(exp != NULL); - - mutex_lock(&lwp_register_list_lock); - cfs_list_for_each_entry_safe(lri, tmp, &lwp_register_list, lri_list) { - if (strcmp(exp->exp_obd->obd_name, lri->lri_name)) - continue; - if (*lri->lri_exp != NULL) - continue; - *lri->lri_exp = class_export_get(exp); - if (lri->lri_cb_func != NULL) - lri->lri_cb_func(lri->lri_cb_data); - } - mutex_unlock(&lwp_register_list_lock); -} - -static int lustre_lwp_connect(struct obd_device *lwp) -{ - struct lu_env env; - struct lu_context session_ctx; - struct obd_export *exp; - struct obd_uuid *uuid = NULL; - struct obd_connect_data *data = NULL; - int rc; - ENTRY; - - /* log has been fully processed, let clients connect */ - rc = lu_env_init(&env, lwp->obd_lu_dev->ld_type->ldt_ctx_tags); - if (rc != 0) - RETURN(rc); - - lu_context_init(&session_ctx, LCT_SESSION); - session_ctx.lc_thread = NULL; - lu_context_enter(&session_ctx); - env.le_ses = &session_ctx; - - OBD_ALLOC_PTR(data); - if (data == NULL) - GOTO(out, rc = -ENOMEM); - - data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_INDEX; - data->ocd_version = LUSTRE_VERSION_CODE; - data->ocd_connect_flags |= OBD_CONNECT_MDS_MDS | OBD_CONNECT_FID | - OBD_CONNECT_AT | OBD_CONNECT_LRU_RESIZE | - OBD_CONNECT_FULL20 | OBD_CONNECT_LVB_TYPE | - OBD_CONNECT_LIGHTWEIGHT | - OBD_CONNECT_PINGLESS; - OBD_ALLOC_PTR(uuid); - if (uuid == NULL) - GOTO(out, rc = -ENOMEM); - - if (strlen(lwp->obd_name) > sizeof(uuid->uuid)) { - CERROR("%s: Too long lwp name %s, max_size is %d\n", - lwp->obd_name, lwp->obd_name, (int)sizeof(uuid->uuid)); - GOTO(out, rc = -EINVAL); - } - - /* Use lwp name as the uuid, so we find the export by lwp name later */ - memcpy(uuid->uuid, lwp->obd_name, strlen(lwp->obd_name)); - rc = obd_connect(&env, &exp, lwp, uuid, data, NULL); - if (rc != 0) - CERROR("%s: connect failed: rc = %d\n", lwp->obd_name, rc); - else - lustre_notify_lwp_list(exp); - -out: - if (data != NULL) - OBD_FREE_PTR(data); - if (uuid != NULL) - OBD_FREE_PTR(uuid); - - lu_env_fini(&env); - lu_context_exit(&session_ctx); - lu_context_fini(&session_ctx); - - RETURN(rc); -} - -/** - * lwp is used by slaves (Non-MDT0 targets) to manage the connection - * to MDT0. - **/ -static int lustre_lwp_setup(struct lustre_cfg *lcfg, struct lustre_sb_info *lsi) -{ - struct obd_connect_data *data = NULL; - struct obd_device *obd; - char *lwpname = NULL; - char *lwpuuid = NULL; - int rc; - ENTRY; - - rc = class_add_uuid(lustre_cfg_string(lcfg, 1), - lcfg->lcfg_nid); - if (rc) { - CERROR("%s: Can't add uuid: rc =%d\n", lsi->lsi_svname, rc); - GOTO(out, rc); - } - - OBD_ALLOC(lwpname, MTI_NAME_MAXLEN); - if (lwpname == NULL) - GOTO(out, rc = -ENOMEM); - - rc = tgt_name2lwpname(lsi->lsi_svname, lwpname); - if (rc != 0) { - CERROR("%s: failed to generate lwp name. %d\n", - lsi->lsi_svname, rc); - GOTO(out, rc); - } - - OBD_ALLOC(lwpuuid, MTI_NAME_MAXLEN); - if (lwpuuid == NULL) - GOTO(out, rc = -ENOMEM); - - sprintf(lwpuuid, "%s_UUID", lwpname); - rc = lustre_start_simple(lwpname, LUSTRE_LWP_NAME, - lwpuuid, lustre_cfg_string(lcfg, 1), - 0, 0, 0); - if (rc) { - CERROR("%s: setup up failed: rc %d\n", lwpname, rc); - GOTO(out, rc); - } - - obd = class_name2obd(lwpname); - LASSERT(obd != NULL); - - rc = lustre_lwp_connect(obd); - if (rc != 0) - CERROR("%s: connect failed: rc = %d\n", lwpname, rc); -out: - if (data != NULL) - OBD_FREE_PTR(data); - if (lwpname != NULL) - OBD_FREE(lwpname, MTI_NAME_MAXLEN); - if (lwpuuid != NULL) - OBD_FREE(lwpuuid, MTI_NAME_MAXLEN); - - RETURN(rc); -} - -/* the caller is responsible for memory free */ -static struct obd_device *lustre_find_lwp(struct lustre_sb_info *lsi, - char **lwpname, char **logname) -{ - struct obd_device *lwp; - int rc = 0; - ENTRY; - - LASSERT(lwpname != NULL); - LASSERT(IS_OST(lsi) || IS_MDT(lsi)); - - OBD_ALLOC(*lwpname, MTI_NAME_MAXLEN); - if (*lwpname == NULL) - RETURN(ERR_PTR(-ENOMEM)); - - if (logname != NULL) { - OBD_ALLOC(*logname, MTI_NAME_MAXLEN); - if (*logname == NULL) - GOTO(out, rc = -ENOMEM); - rc = server_name2fsname(lsi->lsi_svname, *lwpname, NULL); - if (rc != 0) { - CERROR("%s: failed to get fsname from svname. %d\n", - lsi->lsi_svname, rc); - GOTO(out, rc = -EINVAL); - } - sprintf(*logname, "%s-client", *lwpname); - } - - rc = tgt_name2lwpname(lsi->lsi_svname, *lwpname); - if (rc != 0) { - CERROR("%s: failed to generate lwp name. %d\n", - lsi->lsi_svname, rc); - GOTO(out, rc = -EINVAL); - } - - lwp = class_name2obd(*lwpname); - -out: - if (rc != 0) { - if (*lwpname != NULL) { - OBD_FREE(*lwpname, MTI_NAME_MAXLEN); - *lwpname = NULL; - } - if (logname != NULL && *logname != NULL) { - OBD_FREE(*logname, MTI_NAME_MAXLEN); - *logname = NULL; - } - lwp = ERR_PTR(rc); - } - - RETURN(lwp != NULL ? lwp : ERR_PTR(-ENOENT)); -} - -static int lustre_lwp_add_conn(struct lustre_cfg *cfg, - struct lustre_sb_info *lsi) -{ - struct lustre_cfg_bufs *bufs = NULL; - struct lustre_cfg *lcfg = NULL; - char *lwpname = NULL; - struct obd_device *lwp; - int rc; - ENTRY; - - lwp = lustre_find_lwp(lsi, &lwpname, NULL); - if (IS_ERR(lwp)) { - CERROR("%s: can't find lwp device.\n", lsi->lsi_svname); - GOTO(out, rc = PTR_ERR(lwp)); - } - LASSERT(lwpname != NULL); - - OBD_ALLOC_PTR(bufs); - if (bufs == NULL) - GOTO(out, rc = -ENOMEM); - - lustre_cfg_bufs_reset(bufs, lwpname); - lustre_cfg_bufs_set_string(bufs, 1, - lustre_cfg_string(cfg, 1)); - - lcfg = lustre_cfg_new(LCFG_ADD_CONN, bufs); - - rc = class_add_conn(lwp, lcfg); - if (rc) - CERROR("%s: can't add conn: rc = %d\n", lwpname, rc); - -out: - if (bufs != NULL) - OBD_FREE_PTR(bufs); - if (lcfg != NULL) - lustre_cfg_free(lcfg); - if (lwpname != NULL) - OBD_FREE(lwpname, MTI_NAME_MAXLEN); - RETURN(rc); -} - -/** - * Retrieve MDT nids from the client log, then start the lwp device. - * there are only two scenarios which would include mdt nid. - * 1. - * marker 5 (flags=0x01, v2.1.54.0) lustre-MDT0000 'add mdc' xxx- - * add_uuid nid=192.168.122.162@tcp(0x20000c0a87aa2) 0: 1:192.168.122.162@tcp - * attach 0:lustre-MDT0000-mdc 1:mdc 2:lustre-clilmv_UUID - * setup 0:lustre-MDT0000-mdc 1:lustre-MDT0000_UUID 2:192.168.122.162@tcp - * add_uuid nid=192.168.172.1@tcp(0x20000c0a8ac01) 0: 1:192.168.172.1@tcp - * add_conn 0:lustre-MDT0000-mdc 1:192.168.172.1@tcp - * modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID xxxx - * marker 5 (flags=0x02, v2.1.54.0) lustre-MDT0000 'add mdc' xxxx- - * 2. - * marker 7 (flags=0x01, v2.1.54.0) lustre-MDT0000 'add failnid' xxxx- - * add_uuid nid=192.168.122.2@tcp(0x20000c0a87a02) 0: 1:192.168.122.2@tcp - * add_conn 0:lustre-MDT0000-mdc 1:192.168.122.2@tcp - * marker 7 (flags=0x02, v2.1.54.0) lustre-MDT0000 'add failnid' xxxx- -**/ -static int client_lwp_config_process(const struct lu_env *env, - struct llog_handle *handle, - struct llog_rec_hdr *rec, void *data) -{ - struct config_llog_instance *clli = data; - int cfg_len = rec->lrh_len; - char *cfg_buf = (char *) (rec + 1); - struct lustre_cfg *lcfg = NULL; - struct lustre_sb_info *lsi; - int rc = 0, swab = 0; - ENTRY; - - if (rec->lrh_type != OBD_CFG_REC) { - CERROR("Unknown llog record type %#x encountered\n", - rec->lrh_type); - RETURN(-EINVAL); - } - - LASSERT(clli->cfg_sb != NULL); - lsi = s2lsi(clli->cfg_sb); - - lcfg = (struct lustre_cfg *)cfg_buf; - if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) { - lustre_swab_lustre_cfg(lcfg); - swab = 1; - } - - rc = lustre_cfg_sanity_check(cfg_buf, cfg_len); - if (rc) - GOTO(out, rc); - - switch (lcfg->lcfg_command) { - case LCFG_MARKER: { - struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1); - - lustre_swab_cfg_marker(marker, swab, - LUSTRE_CFG_BUFLEN(lcfg, 1)); - if (marker->cm_flags & CM_SKIP || - marker->cm_flags & CM_EXCLUDE) - GOTO(out, rc = 0); - - if (!tgt_is_mdt0(marker->cm_tgtname)) - GOTO(out, rc = 0); - - if(!strncmp(marker->cm_comment, "add mdc", 7) || - !strncmp(marker->cm_comment, "add failnid", 11)) { - if (marker->cm_flags & CM_START) { - clli->cfg_flags = CFG_F_MARKER; - /* This hack is to differentiate the - * ADD_UUID is come from "add mdc" record - * or from "add failnid" record. */ - if (!strncmp(marker->cm_comment, - "add failnid", 11)) - clli->cfg_flags |= CFG_F_SKIP; - } else if (marker->cm_flags & CM_END) { - clli->cfg_flags = 0; - } - } - break; - } - case LCFG_ADD_UUID: { - if (clli->cfg_flags == CFG_F_MARKER) { - rc = lustre_lwp_setup(lcfg, lsi); - /* XXX: process only the first nid as - * we don't need another instance of lwp */ - clli->cfg_flags |= CFG_F_SKIP; - } else if (clli->cfg_flags == (CFG_F_MARKER | CFG_F_SKIP)) { - rc = class_add_uuid(lustre_cfg_string(lcfg, 1), - lcfg->lcfg_nid); - if (rc) - CERROR("%s: Fail to add uuid, rc:%d\n", - lsi->lsi_svname, rc); - } - break; - } - case LCFG_ADD_CONN: { - if (is_mdc_for_mdt0(lustre_cfg_string(lcfg, 0))) - rc = lustre_lwp_add_conn(lcfg, lsi); - break; - } - default: - break; - } -out: - RETURN(rc); -} - -static int lustre_disconnect_lwp(struct super_block *sb) -{ - struct lustre_sb_info *lsi = s2lsi(sb); - struct obd_device *lwp; - char *lwpname = NULL; - char *logname = NULL; - struct lustre_cfg *lcfg = NULL; - struct lustre_cfg_bufs *bufs = NULL; - struct config_llog_instance *cfg = NULL; - int rc; - ENTRY; - - lwp = lustre_find_lwp(lsi, &lwpname, &logname); - if (IS_ERR(lwp) && PTR_ERR(lwp) != -ENOENT) - GOTO(out, rc = PTR_ERR(lwp)); - - LASSERT(lwpname != NULL); - LASSERT(logname != NULL); - - OBD_ALLOC_PTR(cfg); - if (cfg == NULL) - GOTO(out, rc = -ENOMEM); - - /* end log first */ - cfg->cfg_instance = sb; - rc = lustre_end_log(sb, logname, cfg); - if (rc != 0) { - CERROR("%s: Can't end config log %s.\n", lwpname, logname); - GOTO(out, rc); - } - - if (PTR_ERR(lwp) == -ENOENT) { - CDEBUG(D_CONFIG, "%s: lwp device wasn't started.\n", - lsi->lsi_svname); - GOTO(out, rc = 0); - } - - OBD_ALLOC_PTR(bufs); - if (bufs == NULL) - GOTO(out, rc = -ENOMEM); - - lustre_cfg_bufs_reset(bufs, lwp->obd_name); - lustre_cfg_bufs_set_string(bufs, 1, NULL); - lcfg = lustre_cfg_new(LCFG_CLEANUP, bufs); - if (!lcfg) - GOTO(out, rc = -ENOMEM); - - /* Disconnect import first. NULL is passed for the '@env', since - * it will not be used. */ - rc = lwp->obd_lu_dev->ld_ops->ldo_process_config(NULL, lwp->obd_lu_dev, - lcfg); -out: - if (lcfg) - lustre_cfg_free(lcfg); - if (bufs) - OBD_FREE_PTR(bufs); - if (cfg) - OBD_FREE_PTR(cfg); - if (lwpname) - OBD_FREE(lwpname, MTI_NAME_MAXLEN); - if (logname) - OBD_FREE(logname, MTI_NAME_MAXLEN); - RETURN(rc); -} - -/** - * Stop the lwp for an OST/MDT target. - **/ -static int lustre_stop_lwp(struct super_block *sb) -{ - struct lustre_sb_info *lsi = s2lsi(sb); - struct obd_device *lwp = NULL; - char *lwpname = NULL; - int rc = 0; - ENTRY; - - lwp = lustre_find_lwp(lsi, &lwpname, NULL); - if (IS_ERR(lwp)) { - CDEBUG(PTR_ERR(lwp) == -ENOENT ? D_CONFIG : D_ERROR, - "%s: lwp wasn't started.\n", lsi->lsi_svname); - GOTO(out, rc = 0); - } - - lwp->obd_force = 1; - rc = class_manual_cleanup(lwp); - -out: - if (lwpname != NULL) - OBD_FREE(lwpname, MTI_NAME_MAXLEN); - RETURN(rc); -} - -/** - * Start the lwp(fsname-MDT0000-lwp-OSTxxxx) for an OST or MDT target, - * which would be used to establish connection from OST to MDT0. - **/ -static int lustre_start_lwp(struct super_block *sb) -{ - struct lustre_sb_info *lsi = s2lsi(sb); - struct config_llog_instance *cfg = NULL; - struct obd_device *lwp; - char *lwpname = NULL; - char *logname = NULL; - int rc; - ENTRY; - - lwp = lustre_find_lwp(lsi, &lwpname, &logname); - - /* the lwp device already stared */ - if (lwp && !IS_ERR(lwp)) - GOTO(out, rc = 0); - - if (PTR_ERR(lwp) != -ENOENT) - GOTO(out, rc = PTR_ERR(lwp)); - - LASSERT(lwpname != NULL); - LASSERT(logname != NULL); - - OBD_ALLOC_PTR(cfg); - if (cfg == NULL) - GOTO(out, rc = -ENOMEM); - - cfg->cfg_callback = client_lwp_config_process; - cfg->cfg_instance = sb; - - rc = lustre_process_log(sb, logname, cfg); -out: - if (lwpname != NULL) - OBD_FREE(lwpname, MTI_NAME_MAXLEN); - if (logname != NULL) - OBD_FREE(logname, MTI_NAME_MAXLEN); - if (cfg != NULL) - OBD_FREE_PTR(cfg); - RETURN(rc); -} - -DEFINE_MUTEX(server_start_lock); - -/* Stop MDS/OSS if nobody is using them */ -static int server_stop_servers(int lsiflags) -{ - struct obd_device *obd = NULL; - struct obd_type *type = NULL; - int rc = 0; - ENTRY; - - mutex_lock(&server_start_lock); - - /* Either an MDT or an OST or neither */ - /* if this was an MDT, and there are no more MDT's, clean up the MDS */ - if ((lsiflags & LDD_F_SV_TYPE_MDT) && - (obd = class_name2obd(LUSTRE_MDS_OBDNAME))) { - type = class_search_type(LUSTRE_MDT_NAME); - } - /* if this was an OST, and there are no more OST's, clean up the OSS */ - if ((lsiflags & LDD_F_SV_TYPE_OST) && - (obd = class_name2obd(LUSTRE_OSS_OBDNAME))) { - type = class_search_type(LUSTRE_OST_NAME); - } - - if (obd && (!type || !type->typ_refcnt)) { - int err; - obd->obd_force = 1; - /* obd_fail doesn't mean much on a server obd */ - err = class_manual_cleanup(obd); - if (!rc) - rc = err; - } - - mutex_unlock(&server_start_lock); - - RETURN(rc); -} - -int server_mti_print(char *title, struct mgs_target_info *mti) -{ - PRINT_CMD(PRINT_MASK, "mti %s\n", title); - PRINT_CMD(PRINT_MASK, "server: %s\n", mti->mti_svname); - PRINT_CMD(PRINT_MASK, "fs: %s\n", mti->mti_fsname); - PRINT_CMD(PRINT_MASK, "uuid: %s\n", mti->mti_uuid); - PRINT_CMD(PRINT_MASK, "ver: %d flags: %#x\n", - mti->mti_config_ver, mti->mti_flags); - return(0); -} - -/** - * Get service name (svname) from string - * rc < 0 on error - * if endptr isn't NULL it is set to end of fsname * - */ -int server_name2svname(char *label, char *svname, char **endptr, size_t svsize) -{ - int rc; - char *dash; - - /* We use server_name2fsname() just for parsing */ - rc = server_name2fsname(label, NULL, &dash); - if (rc != 0) - return rc; - - if (*dash != '-') - return -1; - - if (strlcpy(svname, dash + 1, svsize) >= svsize) - return -E2BIG; - - return 0; -} -EXPORT_SYMBOL(server_name2svname); - - -/* Get the index from the obd name. - rc = server type, or - rc < 0 on error - if endptr isn't NULL it is set to end of name */ -int server_name2index(char *svname, __u32 *idx, char **endptr) -{ - unsigned long index; - int rc; - char *dash; - - /* We use server_name2fsname() just for parsing */ - rc = server_name2fsname(svname, NULL, &dash); - if (rc != 0) - return rc; - - if (*dash != '-') - return -EINVAL; - - dash++; - - if (strncmp(dash, "MDT", 3) == 0) - rc = LDD_F_SV_TYPE_MDT; - else if (strncmp(dash, "OST", 3) == 0) - rc = LDD_F_SV_TYPE_OST; - else - return -EINVAL; - - dash += 3; - - if (strcmp(dash, "all") == 0) - return rc | LDD_F_SV_ALL; - - index = simple_strtoul(dash, endptr, 16); - *idx = index; - - return rc; -} -EXPORT_SYMBOL(server_name2index); - -/* Generate data for registration */ -static int server_lsi2mti(struct lustre_sb_info *lsi, - struct mgs_target_info *mti) -{ - lnet_process_id_t id; - int rc, i = 0; - int cplen = 0; - ENTRY; - - if (!IS_SERVER(lsi)) - RETURN(-EINVAL); - - if (strlcpy(mti->mti_svname, lsi->lsi_svname, sizeof(mti->mti_svname)) - >= sizeof(mti->mti_svname)) - RETURN(-E2BIG); - - mti->mti_nid_count = 0; - while (LNetGetId(i++, &id) != -ENOENT) { - if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND) - continue; - - /* server use --servicenode param, only allow specified - * nids be registered */ - if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) != 0 && - class_match_nid(lsi->lsi_lmd->lmd_params, - PARAM_FAILNODE, id.nid) < 1) - continue; - - /* match specified network */ - if (!class_match_net(lsi->lsi_lmd->lmd_params, - PARAM_NETWORK, LNET_NIDNET(id.nid))) - continue; - - mti->mti_nids[mti->mti_nid_count] = id.nid; - mti->mti_nid_count++; - if (mti->mti_nid_count >= MTI_NIDS_MAX) { - CWARN("Only using first %d nids for %s\n", - mti->mti_nid_count, mti->mti_svname); - break; - } - } - - mti->mti_lustre_ver = LUSTRE_VERSION_CODE; - mti->mti_config_ver = 0; - - rc = server_name2fsname(lsi->lsi_svname, mti->mti_fsname, NULL); - if (rc != 0) - return rc; - - rc = server_name2index(lsi->lsi_svname, &mti->mti_stripe_index, NULL); - if (rc < 0) - return rc; - /* Orion requires index to be set */ - LASSERT(!(rc & LDD_F_NEED_INDEX)); - /* keep only LDD flags */ - mti->mti_flags = lsi->lsi_flags & LDD_F_MASK; - if (mti->mti_flags & (LDD_F_WRITECONF | LDD_F_VIRGIN)) - mti->mti_flags |= LDD_F_UPDATE; - cplen = strlcpy(mti->mti_params, lsi->lsi_lmd->lmd_params, - sizeof(mti->mti_params)); - if (cplen >= sizeof(mti->mti_params)) - return -E2BIG; - return 0; -} - -/* Register an old or new target with the MGS. If needed MGS will construct - startup logs and assign index */ -static int server_register_target(struct lustre_sb_info *lsi) -{ - struct obd_device *mgc = lsi->lsi_mgc; - struct mgs_target_info *mti = NULL; - bool writeconf; - int rc; - ENTRY; - - LASSERT(mgc); - - if (!IS_SERVER(lsi)) - RETURN(-EINVAL); - - OBD_ALLOC_PTR(mti); - if (!mti) - RETURN(-ENOMEM); - - rc = server_lsi2mti(lsi, mti); - if (rc) - GOTO(out, rc); - - CDEBUG(D_MOUNT, "Registration %s, fs=%s, %s, index=%04x, flags=%#x\n", - mti->mti_svname, mti->mti_fsname, - libcfs_nid2str(mti->mti_nids[0]), mti->mti_stripe_index, - mti->mti_flags); - - /* if write_conf is true, the registration must succeed */ - writeconf = !!(lsi->lsi_flags & (LDD_F_NEED_INDEX | LDD_F_UPDATE)); - mti->mti_flags |= LDD_F_OPC_REG; - - /* Register the target */ - /* FIXME use mgc_process_config instead */ - rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp, - sizeof(KEY_REGISTER_TARGET), KEY_REGISTER_TARGET, - sizeof(*mti), mti, NULL); - if (rc) { - if (mti->mti_flags & LDD_F_ERROR) { - LCONSOLE_ERROR_MSG(0x160, - "The MGS is refusing to allow this " - "server (%s) to start. Please see messages" - " on the MGS node.\n", lsi->lsi_svname); - } else if (writeconf) { - LCONSOLE_ERROR_MSG(0x15f, - "Communication to the MGS return error %d. " - "Is the MGS running?\n", rc); - } else { - CERROR("Cannot talk to the MGS: %d, not fatal\n", rc); - /* reset the error code for non-fatal error. */ - rc = 0; - } - GOTO(out, rc); - } - -out: - if (mti) - OBD_FREE_PTR(mti); - RETURN(rc); -} - -/** - * Notify the MGS that this target is ready. - * Used by IR - if the MGS receives this message, it will notify clients. - */ -static int server_notify_target(struct super_block *sb, struct obd_device *obd) -{ - struct lustre_sb_info *lsi = s2lsi(sb); - struct obd_device *mgc = lsi->lsi_mgc; - struct mgs_target_info *mti = NULL; - int rc; - ENTRY; - - LASSERT(mgc); - - if (!(IS_SERVER(lsi))) - RETURN(-EINVAL); - - OBD_ALLOC_PTR(mti); - if (!mti) - RETURN(-ENOMEM); - rc = server_lsi2mti(lsi, mti); - if (rc) - GOTO(out, rc); - - mti->mti_instance = obd->u.obt.obt_instance; - mti->mti_flags |= LDD_F_OPC_READY; - - /* FIXME use mgc_process_config instead */ - rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp, - sizeof(KEY_REGISTER_TARGET), - KEY_REGISTER_TARGET, - sizeof(*mti), mti, NULL); - - /* Imperative recovery: if the mgs informs us to use IR? */ - if (!rc && !(mti->mti_flags & LDD_F_ERROR) && - (mti->mti_flags & LDD_F_IR_CAPABLE)) - lsi->lsi_flags |= LDD_F_IR_CAPABLE; - -out: - if (mti) - OBD_FREE_PTR(mti); - RETURN(rc); - -} - -/** Start server targets: MDTs and OSTs - */ -static int server_start_targets(struct super_block *sb, struct vfsmount *mnt) -{ - struct obd_device *obd; - struct lustre_sb_info *lsi = s2lsi(sb); - struct config_llog_instance cfg; - struct lu_env env; - struct lu_device *dev; - int rc; - ENTRY; - - CDEBUG(D_MOUNT, "starting target %s\n", lsi->lsi_svname); - - if (IS_MDT(lsi)) { - /* make sure the MDS is started */ - mutex_lock(&server_start_lock); - obd = class_name2obd(LUSTRE_MDS_OBDNAME); - if (!obd) { - rc = lustre_start_simple(LUSTRE_MDS_OBDNAME, - LUSTRE_MDS_NAME, - LUSTRE_MDS_OBDNAME"_uuid", - 0, 0, 0, 0); - if (rc) { - mutex_unlock(&server_start_lock); - CERROR("failed to start MDS: %d\n", rc); - RETURN(rc); - } - } - mutex_unlock(&server_start_lock); - } - - /* If we're an OST, make sure the global OSS is running */ - if (IS_OST(lsi)) { - /* make sure OSS is started */ - mutex_lock(&server_start_lock); - obd = class_name2obd(LUSTRE_OSS_OBDNAME); - if (!obd) { - rc = lustre_start_simple(LUSTRE_OSS_OBDNAME, - LUSTRE_OSS_NAME, - LUSTRE_OSS_OBDNAME"_uuid", - 0, 0, 0, 0); - if (rc) { - mutex_unlock(&server_start_lock); - CERROR("failed to start OSS: %d\n", rc); - RETURN(rc); - } - } - mutex_unlock(&server_start_lock); - } - - /* Set the mgc fs to our server disk. This allows the MGC to - * read and write configs locally, in case it can't talk to the MGS. */ - if (lsi->lsi_srv_mnt) { - rc = server_mgc_set_fs(lsi->lsi_mgc, sb); - if (rc) - GOTO(out_stop_service, rc); - } - - /* Register with MGS */ - rc = server_register_target(lsi); - if (rc) - GOTO(out_mgc, rc); - - /* Let the target look up the mount using the target's name - (we can't pass the sb or mnt through class_process_config.) */ - rc = server_register_mount(lsi->lsi_svname, sb, mnt); - if (rc) - GOTO(out_mgc, rc); - - /* Start targets using the llog named for the target */ - memset(&cfg, 0, sizeof(cfg)); - cfg.cfg_callback = class_config_llog_handler; - rc = lustre_process_log(sb, lsi->lsi_svname, &cfg); - if (rc) { - CERROR("failed to start server %s: %d\n", - lsi->lsi_svname, rc); - /* Do NOT call server_deregister_mount() here. This makes it - * impossible to find mount later in cleanup time and leaves - * @lsi and othder stuff leaked. -umka */ - GOTO(out_mgc, rc); - } - - obd = class_name2obd(lsi->lsi_svname); - if (!obd) { - CERROR("no server named %s was started\n", lsi->lsi_svname); - GOTO(out_mgc, rc = -ENXIO); - } - - if (IS_OST(lsi) || IS_MDT(lsi)) { - rc = lustre_start_lwp(sb); - if (rc) { - CERROR("%s: failed to start LWP: %d\n", - lsi->lsi_svname, rc); - GOTO(out_mgc, rc); - } - } - - server_notify_target(sb, obd); + OBD_FREE_PTR(data); + if (mgcname) + OBD_FREE(mgcname, len); + if (niduuid) + OBD_FREE(niduuid, len + 2); + RETURN(rc); +} - /* calculate recovery timeout, do it after lustre_process_log */ - server_calc_timeout(lsi, obd); +static int lustre_stop_mgc(struct super_block *sb) +{ + struct lustre_sb_info *lsi = s2lsi(sb); + struct obd_device *obd; + char *niduuid = 0, *ptr = 0; + int i, rc = 0, len = 0; + ENTRY; - /* log has been fully processed */ - obd_notify(obd, NULL, OBD_NOTIFY_CONFIG, (void *)CONFIG_LOG); + if (!lsi) + RETURN(-ENOENT); + obd = lsi->lsi_mgc; + if (!obd) + RETURN(-ENOENT); + lsi->lsi_mgc = NULL; - /* log has been fully processed, let clients connect */ - dev = obd->obd_lu_dev; - if (dev && dev->ld_ops->ldo_prepare) { - rc = lu_env_init(&env, dev->ld_type->ldt_ctx_tags); - if (rc == 0) { - struct lu_context session_ctx; + mutex_lock(&mgc_start_lock); + LASSERT(cfs_atomic_read(&obd->u.cli.cl_mgc_refcount) > 0); + if (!cfs_atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) { + /* This is not fatal, every client that stops + will call in here. */ + CDEBUG(D_MOUNT, "mgc still has %d references.\n", + cfs_atomic_read(&obd->u.cli.cl_mgc_refcount)); + GOTO(out, rc = -EBUSY); + } - lu_context_init(&session_ctx, LCT_SESSION); - session_ctx.lc_thread = NULL; - lu_context_enter(&session_ctx); - env.le_ses = &session_ctx; + /* The MGC has no recoverable data in any case. + * force shotdown set in umount_begin */ + obd->obd_no_recov = 1; - rc = dev->ld_ops->ldo_prepare(&env, NULL, dev); + if (obd->u.cli.cl_mgc_mgsexp) { + /* An error is not fatal, if we are unable to send the + disconnect mgs ping evictor cleans up the export */ + rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp); + if (rc) + CDEBUG(D_MOUNT, "disconnect failed %d\n", rc); + } - lu_env_fini(&env); - lu_context_exit(&session_ctx); - lu_context_fini(&session_ctx); - } - } + /* Save the obdname for cleaning the nid uuids, which are + obdname_XX */ + len = strlen(obd->obd_name) + 6; + OBD_ALLOC(niduuid, len); + if (niduuid) { + strcpy(niduuid, obd->obd_name); + ptr = niduuid + strlen(niduuid); + } - /* abort recovery only on the complete stack: - * many devices can be involved */ - if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_ABORT_RECOV) && - (OBP(obd, iocontrol))) { - obd_iocontrol(OBD_IOC_ABORT_RECOVERY, obd->obd_self_export, 0, - NULL, NULL); - } + rc = class_manual_cleanup(obd); + if (rc) + GOTO(out, rc); -out_mgc: - /* Release the mgc fs for others to use */ - if (lsi->lsi_srv_mnt) - server_mgc_clear_fs(lsi->lsi_mgc); + /* Clean the nid uuids */ + if (!niduuid) + GOTO(out, rc = -ENOMEM); -out_stop_service: - if (rc != 0) - server_stop_servers(lsi->lsi_flags); + for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) { + sprintf(ptr, "_%x", i); + rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID, + niduuid, 0, 0, 0); + if (rc) + CERROR("del MDC UUID %s failed: rc = %d\n", + niduuid, rc); + } +out: + if (niduuid) + OBD_FREE(niduuid, len); + /* class_import_put will get rid of the additional connections */ + mutex_unlock(&mgc_start_lock); RETURN(rc); } @@ -1994,7 +630,7 @@ static int lustre_free_lsi(struct super_block *sb) /* The lsi has one reference for every server that is using the disk - e.g. MDT, MGS, and potentially MGC */ -static int lustre_put_lsi(struct super_block *sb) +int lustre_put_lsi(struct super_block *sb) { struct lustre_sb_info *lsi = s2lsi(sb); ENTRY; @@ -2014,476 +650,109 @@ static int lustre_put_lsi(struct super_block *sb) RETURN(0); } -static int lsi_prepare(struct lustre_sb_info *lsi) -{ - __u32 index; - int rc; - ENTRY; - - LASSERT(lsi); - LASSERT(lsi->lsi_lmd); - - /* The server name is given as a mount line option */ - if (lsi->lsi_lmd->lmd_profile == NULL) { - LCONSOLE_ERROR("Can't determine server name\n"); - RETURN(-EINVAL); - } - - if (strlen(lsi->lsi_lmd->lmd_profile) >= sizeof(lsi->lsi_svname)) - RETURN(-ENAMETOOLONG); - - strcpy(lsi->lsi_svname, lsi->lsi_lmd->lmd_profile); - - /* Determine osd type */ - if (lsi->lsi_lmd->lmd_osd_type != NULL) { - if (strlen(lsi->lsi_lmd->lmd_osd_type) >= - sizeof(lsi->lsi_osd_type)) - RETURN(-ENAMETOOLONG); - - strcpy(lsi->lsi_osd_type, lsi->lsi_lmd->lmd_osd_type); - } else { - strcpy(lsi->lsi_osd_type, LUSTRE_OSD_LDISKFS_NAME); - } - - /* XXX: a temp. solution for components using fsfilt - * to be removed in one of the subsequent patches */ - if (!strcmp(lsi->lsi_lmd->lmd_osd_type, "osd-ldiskfs")) { - strcpy(lsi->lsi_fstype, "ldiskfs"); - } else { - strcpy(lsi->lsi_fstype, lsi->lsi_lmd->lmd_osd_type); - } - - /* Determine server type */ - rc = server_name2index(lsi->lsi_svname, &index, NULL); - if (rc < 0) { - if (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) { - /* Assume we're a bare MGS */ - rc = 0; - lsi->lsi_lmd->lmd_flags |= LMD_FLG_NOSVC; - } else { - LCONSOLE_ERROR("Can't determine server type of '%s'\n", - lsi->lsi_svname); - RETURN(rc); - } - } - lsi->lsi_flags |= rc; - - /* Add mount line flags that used to be in ldd: - * writeconf, mgs, anything else? - */ - lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_WRITECONF) ? - LDD_F_WRITECONF : 0; - lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_VIRGIN) ? - LDD_F_VIRGIN : 0; - lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) ? - LDD_F_SV_TYPE_MGS : 0; - lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) ? - LDD_F_NO_PRIMNODE : 0; - - RETURN(0); -} - -/*************** server mount ******************/ - -/** Start the shutdown of servers at umount. +/** Get the fsname ("lustre") from the server name ("lustre-OST003F"). + * @param [in] svname server name including type and index + * @param [out] fsname Buffer to copy filesystem name prefix into. + * Must have at least 'strlen(fsname) + 1' chars. + * @param [out] endptr if endptr isn't NULL it is set to end of fsname + * rc < 0 on error */ -static void server_put_super(struct super_block *sb) +int server_name2fsname(const char *svname, char *fsname, const char **endptr) { - struct lustre_sb_info *lsi = s2lsi(sb); - struct obd_device *obd; - char *tmpname, *extraname = NULL; - int tmpname_sz; - int lsiflags = lsi->lsi_flags; - ENTRY; - - LASSERT(IS_SERVER(lsi)); - - tmpname_sz = strlen(lsi->lsi_svname) + 1; - OBD_ALLOC(tmpname, tmpname_sz); - memcpy(tmpname, lsi->lsi_svname, tmpname_sz); - CDEBUG(D_MOUNT, "server put_super %s\n", tmpname); - if (IS_MDT(lsi) && (lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC)) - snprintf(tmpname, tmpname_sz, "MGS"); - - /* disconnect the lwp first to drain off the inflight request */ - if (IS_OST(lsi) || IS_MDT(lsi)) { - int rc; - - rc = lustre_disconnect_lwp(sb); - if (rc && rc != ETIMEDOUT) - CERROR("%s: failed to disconnect lwp. (rc=%d)\n", - tmpname, rc); + const char *dash = strrchr(svname, '-'); + if (!dash) { + dash = strrchr(svname, ':'); + if (!dash) + return -EINVAL; } - /* Stop the target */ - if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) && - (IS_MDT(lsi) || IS_OST(lsi))) { - struct lustre_profile *lprof = NULL; - - /* tell the mgc to drop the config log */ - lustre_end_log(sb, lsi->lsi_svname, NULL); - - /* COMPAT_146 - profile may get deleted in mgc_cleanup. - If there are any setup/cleanup errors, save the lov - name for safety cleanup later. */ - lprof = class_get_profile(lsi->lsi_svname); - if (lprof && lprof->lp_dt) { - OBD_ALLOC(extraname, strlen(lprof->lp_dt) + 1); - strcpy(extraname, lprof->lp_dt); - } - - obd = class_name2obd(lsi->lsi_svname); - if (obd) { - CDEBUG(D_MOUNT, "stopping %s\n", obd->obd_name); - if (lsiflags & LSI_UMOUNT_FAILOVER) - obd->obd_fail = 1; - /* We can't seem to give an error return code - * to .put_super, so we better make sure we clean up! */ - obd->obd_force = 1; - class_manual_cleanup(obd); - } else { - CERROR("no obd %s\n", lsi->lsi_svname); - server_deregister_mount(lsi->lsi_svname); - } - } - - /* If they wanted the mgs to stop separately from the mdt, they - should have put it on a different device. */ - if (IS_MGS(lsi)) { - /* if MDS start with --nomgs, don't stop MGS then */ - if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)) - server_stop_mgs(sb); - } + /* interpret -MDTXXXXX-mdc as mdt, the better way is to pass + * in the fsname, then determine the server index */ + if (!strcmp(LUSTRE_MDC_NAME, dash + 1)) { + dash--; + for (; dash > svname && *dash != '-' && *dash != ':'; dash--) + ; + if (dash == svname) + return -EINVAL; + } - if (IS_OST(lsi) || IS_MDT(lsi)) { - if (lustre_stop_lwp(sb) < 0) - CERROR("%s: failed to stop lwp!\n", tmpname); + if (fsname != NULL) { + strncpy(fsname, svname, dash - svname); + fsname[dash - svname] = '\0'; } - /* Clean the mgc and sb */ - lustre_common_put_super(sb); - - /* wait till all in-progress cleanups are done - * specifically we're interested in ofd cleanup - * as it pins OSS */ - obd_zombie_barrier(); - - /* Stop the servers (MDS, OSS) if no longer needed. We must wait - until the target is really gone so that our type refcount check - is right. */ - server_stop_servers(lsiflags); - - /* In case of startup or cleanup err, stop related obds */ - if (extraname) { - obd = class_name2obd(extraname); - if (obd) { - CWARN("Cleaning orphaned obd %s\n", extraname); - obd->obd_force = 1; - class_manual_cleanup(obd); - } - OBD_FREE(extraname, strlen(extraname) + 1); - } + if (endptr != NULL) + *endptr = dash; - LCONSOLE_WARN("server umount %s complete\n", tmpname); - OBD_FREE(tmpname, tmpname_sz); - EXIT; + return 0; } +EXPORT_SYMBOL(server_name2fsname); -/** Called only for 'umount -f' +/** + * Get service name (svname) from string + * rc < 0 on error + * if endptr isn't NULL it is set to end of fsname * */ -#ifdef HAVE_UMOUNTBEGIN_VFSMOUNT -static void server_umount_begin(struct vfsmount *vfsmnt, int flags) -{ - struct super_block *sb = vfsmnt->mnt_sb; -#else -static void server_umount_begin(struct super_block *sb) -{ -#endif - struct lustre_sb_info *lsi = s2lsi(sb); - ENTRY; - -#ifdef HAVE_UMOUNTBEGIN_VFSMOUNT - if (!(flags & MNT_FORCE)) { - EXIT; - return; - } -#endif - - CDEBUG(D_MOUNT, "umount -f\n"); - /* umount = failover - umount -f = force - no third way to do non-force, non-failover */ - lsi->lsi_flags &= ~LSI_UMOUNT_FAILOVER; - EXIT; -} - -static int server_statfs(struct dentry *dentry, struct kstatfs *buf) +int server_name2svname(const char *label, char *svname, const char **endptr, + size_t svsize) { - struct super_block *sb = dentry->d_sb; - struct lustre_sb_info *lsi = s2lsi(sb); - struct obd_statfs statfs; int rc; - ENTRY; - - if (lsi->lsi_dt_dev) { - rc = dt_statfs(NULL, lsi->lsi_dt_dev, &statfs); - if (rc == 0) { - statfs_unpack(buf, &statfs); - buf->f_type = sb->s_magic; - RETURN(0); - } - } - - /* just return 0 */ - buf->f_type = sb->s_magic; - buf->f_bsize = sb->s_blocksize; - buf->f_blocks = 1; - buf->f_bfree = 0; - buf->f_bavail = 0; - buf->f_files = 1; - buf->f_ffree = 0; - buf->f_namelen = NAME_MAX; - RETURN(0); -} - -/** The operations we support directly on the superblock: - * mount, umount, and df. - */ -static struct super_operations server_ops = -{ - .put_super = server_put_super, - .umount_begin = server_umount_begin, /* umount -f */ - .statfs = server_statfs, -}; - -#define log2(n) ffz(~(n)) -#define LUSTRE_SUPER_MAGIC 0x0BD00BD1 - -static int server_fill_super_common(struct super_block *sb) -{ - struct inode *root = 0; - ENTRY; - - CDEBUG(D_MOUNT, "Server sb, dev=%d\n", (int)sb->s_dev); + const const char *dash; - sb->s_blocksize = 4096; - sb->s_blocksize_bits = log2(sb->s_blocksize); - sb->s_magic = LUSTRE_SUPER_MAGIC; - sb->s_maxbytes = 0; /* we don't allow file IO on server mountpoints */ - sb->s_flags |= MS_RDONLY; - sb->s_op = &server_ops; - - root = new_inode(sb); - if (!root) { - CERROR("Can't make root inode\n"); - RETURN(-EIO); - } - - /* returns -EIO for every operation */ - /* make_bad_inode(root); -- badness - can't umount */ - /* apparently we need to be a directory for the mount to finish */ - root->i_mode = S_IFDIR; - - sb->s_root = d_make_root(root); - if (!sb->s_root) { - CERROR("%s: can't make root dentry\n", sb->s_id); - RETURN(-EIO); - } - - RETURN(0); -} - -static int osd_start(struct lustre_sb_info *lsi, unsigned long mflags) -{ - struct lustre_mount_data *lmd = lsi->lsi_lmd; - struct obd_device *obd; - struct dt_device_param p; - char flagstr[16]; - int rc; - ENTRY; - - CDEBUG(D_MOUNT, - "Attempting to start %s, type=%s, lsifl=%x, mountfl=%lx\n", - lsi->lsi_svname, lsi->lsi_osd_type, lsi->lsi_flags, mflags); - - sprintf(lsi->lsi_osd_obdname, "%s-osd", lsi->lsi_svname); - strcpy(lsi->lsi_osd_uuid, lsi->lsi_osd_obdname); - strcat(lsi->lsi_osd_uuid, "_UUID"); - sprintf(flagstr, "%lu:%lu", mflags, (unsigned long) lmd->lmd_flags); - - obd = class_name2obd(lsi->lsi_osd_obdname); - if (obd == NULL) { - rc = lustre_start_simple(lsi->lsi_osd_obdname, - lsi->lsi_osd_type, - lsi->lsi_osd_uuid, lmd->lmd_dev, - flagstr, lsi->lsi_lmd->lmd_opts, - lsi->lsi_svname); - if (rc) - GOTO(out, rc); - obd = class_name2obd(lsi->lsi_osd_obdname); - LASSERT(obd); - } - - rc = obd_connect(NULL, &lsi->lsi_osd_exp, obd, &obd->obd_uuid, NULL, NULL); - if (rc) { - obd->obd_force = 1; - class_manual_cleanup(obd); - lsi->lsi_dt_dev = NULL; - } - - /* XXX: to keep support old components relying on lsi_srv_mnt - * we get this info from OSD just started */ - LASSERT(obd->obd_lu_dev); - lsi->lsi_dt_dev = lu2dt_dev(obd->obd_lu_dev); - LASSERT(lsi->lsi_dt_dev); + /* We use server_name2fsname() just for parsing */ + rc = server_name2fsname(label, NULL, &dash); + if (rc != 0) + return rc; - dt_conf_get(NULL, lsi->lsi_dt_dev, &p); + if (*dash != '-') + return -1; - lsi->lsi_srv_mnt = p.ddp_mnt; + if (strlcpy(svname, dash + 1, svsize) >= svsize) + return -E2BIG; -out: - RETURN(rc); + return 0; } +EXPORT_SYMBOL(server_name2svname); -/** Fill in the superblock info for a Lustre server. - * Mount the device with the correct options. - * Read the on-disk config file. - * Start the services. - */ -static int server_fill_super(struct super_block *sb) -{ - struct lustre_sb_info *lsi = s2lsi(sb); - int rc; - ENTRY; - - rc = lsi_prepare(lsi); - if (rc) - RETURN(rc); - - /* Start low level OSD */ - rc = osd_start(lsi, sb->s_flags); - if (rc) { - CERROR("Unable to start osd on %s: %d\n", - lsi->lsi_lmd->lmd_dev, rc); - lustre_put_lsi(sb); - RETURN(rc); - } - - CDEBUG(D_MOUNT, "Found service %s on device %s\n", - lsi->lsi_svname, lsi->lsi_lmd->lmd_dev); - - if (class_name2obd(lsi->lsi_svname)) { - LCONSOLE_ERROR_MSG(0x161, "The target named %s is already " - "running. Double-mount may have compromised" - " the disk journal.\n", - lsi->lsi_svname); - lustre_put_lsi(sb); - RETURN(-EALREADY); - } - - /* Start MGS before MGC */ - if (IS_MGS(lsi) && !(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)){ - rc = server_start_mgs(sb); - if (rc) - GOTO(out_mnt, rc); - } - - /* Start MGC before servers */ - rc = lustre_start_mgc(sb); - if (rc) - GOTO(out_mnt, rc); - - /* Set up all obd devices for service */ - if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) && - (IS_OST(lsi) || IS_MDT(lsi))) { - rc = server_start_targets(sb, lsi->lsi_srv_mnt); - if (rc < 0) { - CERROR("Unable to start targets: %d\n", rc); - GOTO(out_mnt, rc); - } - /* FIXME overmount client here, - or can we just start a client log and client_fill_super on this sb? - We need to make sure server_put_super gets called too - ll_put_super - calls lustre_common_put_super; check there for LSI_SERVER flag, - call s_p_s if so. - Probably should start client from new thread so we can return. - Client will not finish until all servers are connected. - Note - MGS-only server does NOT get a client, since there is no - lustre fs associated - the MGS is for all lustre fs's */ - } - - rc = server_fill_super_common(sb); - if (rc) - GOTO(out_mnt, rc); - - RETURN(0); -out_mnt: - /* We jump here in case of failure while starting targets or MGS. - * In this case we can't just put @mnt and have to do real cleanup - * with stoping targets, etc. */ - server_put_super(sb); - return rc; -} -/* - * Calculate timeout value for a target. - */ -void server_calc_timeout(struct lustre_sb_info *lsi, struct obd_device *obd) +/* Get the index from the obd name. + rc = server type, or + rc < 0 on error + if endptr isn't NULL it is set to end of name */ +int server_name2index(const char *svname, __u32 *idx, const char **endptr) { - struct lustre_mount_data *lmd; - int soft = 0; - int hard = 0; - int factor = 0; - bool has_ir = !!(lsi->lsi_flags & LDD_F_IR_CAPABLE); - int min = OBD_RECOVERY_TIME_MIN; - - LASSERT(IS_SERVER(lsi)); - - lmd = lsi->lsi_lmd; - if (lmd) { - soft = lmd->lmd_recovery_time_soft; - hard = lmd->lmd_recovery_time_hard; - has_ir = has_ir && !(lmd->lmd_flags & LMD_FLG_NOIR); - obd->obd_no_ir = !has_ir; - } - - if (soft == 0) - soft = OBD_RECOVERY_TIME_SOFT; - if (hard == 0) - hard = OBD_RECOVERY_TIME_HARD; + unsigned long index; + int rc; + const char *dash; - /* target may have ir_factor configured. */ - factor = OBD_IR_FACTOR_DEFAULT; - if (obd->obd_recovery_ir_factor) - factor = obd->obd_recovery_ir_factor; + /* We use server_name2fsname() just for parsing */ + rc = server_name2fsname(svname, NULL, &dash); + if (rc != 0) + return rc; - if (has_ir) { - int new_soft = soft; - int new_hard = hard; + if (*dash != '-') + return -EINVAL; - /* adjust timeout value by imperative recovery */ + dash++; - new_soft = (soft * factor) / OBD_IR_FACTOR_MAX; - new_hard = (hard * factor) / OBD_IR_FACTOR_MAX; + if (strncmp(dash, "MDT", 3) == 0) + rc = LDD_F_SV_TYPE_MDT; + else if (strncmp(dash, "OST", 3) == 0) + rc = LDD_F_SV_TYPE_OST; + else + return -EINVAL; - /* make sure the timeout is not too short */ - new_soft = max(min, new_soft); - new_hard = max(new_soft, new_hard); + dash += 3; - LCONSOLE_INFO("%s: Imperative Recovery enabled, recovery " - "window shrunk from %d-%d down to %d-%d\n", - obd->obd_name, soft, hard, new_soft, new_hard); + if (strcmp(dash, "all") == 0) + return rc | LDD_F_SV_ALL; - soft = new_soft; - hard = new_hard; - } + index = simple_strtoul(dash, (char **)endptr, 16); + *idx = index; - /* we're done */ - obd->obd_recovery_timeout = max(obd->obd_recovery_timeout, soft); - obd->obd_recovery_time_hard = hard; - obd->obd_recovery_ir_factor = factor; + return rc; } -EXPORT_SYMBOL(server_calc_timeout); +EXPORT_SYMBOL(server_name2index); /*************** mount common betweeen server and client ***************/ @@ -2515,29 +784,29 @@ EXPORT_SYMBOL(lustre_common_put_super); static void lmd_print(struct lustre_mount_data *lmd) { - int i; + int i; - PRINT_CMD(PRINT_MASK, " mount data:\n"); - if (lmd_is_client(lmd)) - PRINT_CMD(PRINT_MASK, "profile: %s\n", lmd->lmd_profile); - PRINT_CMD(PRINT_MASK, "device: %s\n", lmd->lmd_dev); - PRINT_CMD(PRINT_MASK, "flags: %x\n", lmd->lmd_flags); + PRINT_CMD(D_MOUNT, " mount data:\n"); + if (lmd_is_client(lmd)) + PRINT_CMD(D_MOUNT, "profile: %s\n", lmd->lmd_profile); + PRINT_CMD(D_MOUNT, "device: %s\n", lmd->lmd_dev); + PRINT_CMD(D_MOUNT, "flags: %x\n", lmd->lmd_flags); - if (lmd->lmd_opts) - PRINT_CMD(PRINT_MASK, "options: %s\n", lmd->lmd_opts); + if (lmd->lmd_opts) + PRINT_CMD(D_MOUNT, "options: %s\n", lmd->lmd_opts); - if (lmd->lmd_recovery_time_soft) - PRINT_CMD(PRINT_MASK, "recovery time soft: %d\n", - lmd->lmd_recovery_time_soft); + if (lmd->lmd_recovery_time_soft) + PRINT_CMD(D_MOUNT, "recovery time soft: %d\n", + lmd->lmd_recovery_time_soft); - if (lmd->lmd_recovery_time_hard) - PRINT_CMD(PRINT_MASK, "recovery time hard: %d\n", - lmd->lmd_recovery_time_hard); + if (lmd->lmd_recovery_time_hard) + PRINT_CMD(D_MOUNT, "recovery time hard: %d\n", + lmd->lmd_recovery_time_hard); - for (i = 0; i < lmd->lmd_exclude_count; i++) { - PRINT_CMD(PRINT_MASK, "exclude %d: OST%04x\n", i, - lmd->lmd_exclude[i]); - } + for (i = 0; i < lmd->lmd_exclude_count; i++) { + PRINT_CMD(D_MOUNT, "exclude %d: OST%04x\n", i, + lmd->lmd_exclude[i]); + } } /* Is this server on the exclusion list */ @@ -2567,9 +836,9 @@ int lustre_check_exclusion(struct super_block *sb, char *svname) } /* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */ -static int lmd_make_exclusion(struct lustre_mount_data *lmd, char *ptr) +static int lmd_make_exclusion(struct lustre_mount_data *lmd, const char *ptr) { - char *s1 = ptr, *s2; + const char *s1 = ptr, *s2; __u32 index, *exclude_list; int rc = 0, devmax; ENTRY; @@ -2935,10 +1204,10 @@ int lustre_fill_super(struct super_block *sb, void *data, int silent) RETURN(-ENOMEM); lmd = lsi->lsi_lmd; - /* - * Disable lockdep during mount, because mount locking patterns are - * `special'. - */ + /* + * Disable lockdep during mount, because mount locking patterns are + * `special'. + */ lockdep_off(); /* @@ -2972,12 +1241,18 @@ int lustre_fill_super(struct super_block *sb, void *data, int silent) /* c_f_s will call lustre_common_put_super on failure */ } } else { - CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev); - rc = server_fill_super(sb); - /* s_f_s calls lustre_start_mgc after the mount because we need - the MGS nids which are stored on disk. Plus, we may - need to start the MGS first. */ - /* s_f_s will call server_put_super on failure */ +#ifdef HAVE_SERVER_SUPPORT + CDEBUG(D_MOUNT, "Mounting server from %s\n", lmd->lmd_dev); + rc = server_fill_super(sb); + /* s_f_s calls lustre_start_mgc after the mount because we need + the MGS nids which are stored on disk. Plus, we may + need to start the MGS first. */ + /* s_f_s will call server_put_super on failure */ +#else + CERROR("This is client-side-only module, " + "cannot handle server mount.\n"); + rc = -EINVAL; +#endif } /* If error happens in fill_super() call, @lsi will be killed there. @@ -2992,7 +1267,7 @@ out: lmd->lmd_dev); } lockdep_on(); - return rc; + return rc; } @@ -3064,5 +1339,3 @@ int lustre_unregister_fs(void) { return unregister_filesystem(&lustre_fs_type); } - -EXPORT_SYMBOL(server_mti_print); diff --git a/lustre/obdclass/obd_mount_server.c b/lustre/obdclass/obd_mount_server.c new file mode 100644 index 0000000..86d19d7 --- /dev/null +++ b/lustre/obdclass/obd_mount_server.c @@ -0,0 +1,1785 @@ +/* + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. + * + * This program 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 version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + * GPL HEADER END + */ +/* + * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2011, 2012, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * lustre/obdclass/obd_mount_server.c + * + * Server mount routines + * + * Author: Nathan Rutman + */ + + +#define DEBUG_SUBSYSTEM S_CLASS +#define D_MOUNT (D_SUPER | D_CONFIG /* | D_WARNING */) +#define PRINT_CMD CDEBUG +#define PRINT_MASK (D_SUPER | D_CONFIG) + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#ifdef HAVE_KERNEL_LOCKED +#include +#endif + +/*********** mount lookup *********/ + +DEFINE_MUTEX(lustre_mount_info_lock); +static CFS_LIST_HEAD(server_mount_info_list); + +static struct lustre_mount_info *server_find_mount(const char *name) +{ + cfs_list_t *tmp; + struct lustre_mount_info *lmi; + ENTRY; + + cfs_list_for_each(tmp, &server_mount_info_list) { + lmi = cfs_list_entry(tmp, struct lustre_mount_info, + lmi_list_chain); + if (strcmp(name, lmi->lmi_name) == 0) + RETURN(lmi); + } + RETURN(NULL); +} + +/* we must register an obd for a mount before we call the setup routine. + *_setup will call lustre_get_mount to get the mnt struct + by obd_name, since we can't pass the pointer to setup. */ +static int server_register_mount(const char *name, struct super_block *sb, + struct vfsmount *mnt) +{ + struct lustre_mount_info *lmi; + char *name_cp; + ENTRY; + + LASSERT(sb); + + OBD_ALLOC(lmi, sizeof(*lmi)); + if (!lmi) + RETURN(-ENOMEM); + OBD_ALLOC(name_cp, strlen(name) + 1); + if (!name_cp) { + OBD_FREE(lmi, sizeof(*lmi)); + RETURN(-ENOMEM); + } + strcpy(name_cp, name); + + mutex_lock(&lustre_mount_info_lock); + + if (server_find_mount(name)) { + mutex_unlock(&lustre_mount_info_lock); + OBD_FREE(lmi, sizeof(*lmi)); + OBD_FREE(name_cp, strlen(name) + 1); + CERROR("Already registered %s\n", name); + RETURN(-EEXIST); + } + lmi->lmi_name = name_cp; + lmi->lmi_sb = sb; + lmi->lmi_mnt = mnt; + cfs_list_add(&lmi->lmi_list_chain, &server_mount_info_list); + + mutex_unlock(&lustre_mount_info_lock); + + CDEBUG(D_MOUNT, "reg_mnt %p from %s\n", lmi->lmi_mnt, name); + + RETURN(0); +} + +/* when an obd no longer needs a mount */ +static int server_deregister_mount(const char *name) +{ + struct lustre_mount_info *lmi; + ENTRY; + + mutex_lock(&lustre_mount_info_lock); + lmi = server_find_mount(name); + if (!lmi) { + mutex_unlock(&lustre_mount_info_lock); + CERROR("%s not registered\n", name); + RETURN(-ENOENT); + } + + CDEBUG(D_MOUNT, "dereg_mnt %p from %s\n", lmi->lmi_mnt, name); + + OBD_FREE(lmi->lmi_name, strlen(lmi->lmi_name) + 1); + cfs_list_del(&lmi->lmi_list_chain); + OBD_FREE(lmi, sizeof(*lmi)); + mutex_unlock(&lustre_mount_info_lock); + + RETURN(0); +} + +/* obd's look up a registered mount using their obdname. This is just + for initial obd setup to find the mount struct. It should not be + called every time you want to mntget. */ +struct lustre_mount_info *server_get_mount(const char *name) +{ + struct lustre_mount_info *lmi; + struct lustre_sb_info *lsi; + ENTRY; + + mutex_lock(&lustre_mount_info_lock); + lmi = server_find_mount(name); + mutex_unlock(&lustre_mount_info_lock); + if (!lmi) { + CERROR("Can't find mount for %s\n", name); + RETURN(NULL); + } + lsi = s2lsi(lmi->lmi_sb); + + cfs_atomic_inc(&lsi->lsi_mounts); + + CDEBUG(D_MOUNT, "get_mnt %p from %s, refs=%d\n", lmi->lmi_mnt, + name, cfs_atomic_read(&lsi->lsi_mounts)); + + RETURN(lmi); +} +EXPORT_SYMBOL(server_get_mount); + +/* + * Used by mdt to get mount_info from obdname. + * There are no blocking when using the mount_info. + * Do not use server_get_mount for this purpose. + */ +struct lustre_mount_info *server_get_mount_2(const char *name) +{ + struct lustre_mount_info *lmi; + ENTRY; + + mutex_lock(&lustre_mount_info_lock); + lmi = server_find_mount(name); + mutex_unlock(&lustre_mount_info_lock); + if (!lmi) + CERROR("Can't find mount for %s\n", name); + + RETURN(lmi); +} +EXPORT_SYMBOL(server_get_mount_2); + +/* to be called from obd_cleanup methods */ +int server_put_mount(const char *name, struct vfsmount *mnt) +{ + struct lustre_mount_info *lmi; + struct lustre_sb_info *lsi; + ENTRY; + + mutex_lock(&lustre_mount_info_lock); + lmi = server_find_mount(name); + mutex_unlock(&lustre_mount_info_lock); + if (!lmi) { + CERROR("Can't find mount for %s\n", name); + RETURN(-ENOENT); + } + lsi = s2lsi(lmi->lmi_sb); + + CDEBUG(D_MOUNT, "put_mnt %p from %s, refs=%d\n", + lmi->lmi_mnt, name, cfs_atomic_read(&lsi->lsi_mounts)); + + if (lustre_put_lsi(lmi->lmi_sb)) + CDEBUG(D_MOUNT, "Last put of mnt %p from %s\n", + lmi->lmi_mnt, name); + + /* this obd should never need the mount again */ + server_deregister_mount(name); + + RETURN(0); +} +EXPORT_SYMBOL(server_put_mount); + +/* Corresponding to server_get_mount_2 */ +int server_put_mount_2(const char *name, struct vfsmount *mnt) +{ + ENTRY; + RETURN(0); +} +EXPORT_SYMBOL(server_put_mount_2); + +/* Set up a MGS to serve startup logs */ +static int server_start_mgs(struct super_block *sb) +{ + struct lustre_sb_info *lsi = s2lsi(sb); + struct vfsmount *mnt = lsi->lsi_srv_mnt; + struct lustre_mount_info *lmi; + int rc = 0; + ENTRY; + + /* It is impossible to have more than 1 MGS per node, since + MGC wouldn't know which to connect to */ + lmi = server_find_mount(LUSTRE_MGS_OBDNAME); + if (lmi) { + lsi = s2lsi(lmi->lmi_sb); + LCONSOLE_ERROR_MSG(0x15d, "The MGS service was already started" + " from server\n"); + RETURN(-EALREADY); + } + + CDEBUG(D_CONFIG, "Start MGS service %s\n", LUSTRE_MGS_OBDNAME); + + rc = server_register_mount(LUSTRE_MGS_OBDNAME, sb, mnt); + + if (!rc) { + rc = lustre_start_simple(LUSTRE_MGS_OBDNAME, LUSTRE_MGS_NAME, + LUSTRE_MGS_OBDNAME, 0, 0, + lsi->lsi_osd_obdname, 0); + /* Do NOT call server_deregister_mount() here. This leads to + * inability cleanup cleanly and free lsi and other stuff when + * mgs calls server_put_mount() in error handling case. -umka */ + } + + if (rc) + LCONSOLE_ERROR_MSG(0x15e, "Failed to start MGS '%s' (%d). " + "Is the 'mgs' module loaded?\n", + LUSTRE_MGS_OBDNAME, rc); + RETURN(rc); +} + +static int server_stop_mgs(struct super_block *sb) +{ + struct obd_device *obd; + int rc; + ENTRY; + + CDEBUG(D_MOUNT, "Stop MGS service %s\n", LUSTRE_MGS_OBDNAME); + + /* There better be only one MGS */ + obd = class_name2obd(LUSTRE_MGS_OBDNAME); + if (!obd) { + CDEBUG(D_CONFIG, "mgs %s not running\n", LUSTRE_MGS_OBDNAME); + RETURN(-EALREADY); + } + + /* The MGS should always stop when we say so */ + obd->obd_force = 1; + rc = class_manual_cleanup(obd); + RETURN(rc); +} + +/* Since there's only one mgc per node, we have to change it's fs to get + access to the right disk. */ +static int server_mgc_set_fs(struct obd_device *mgc, struct super_block *sb) +{ + struct lustre_sb_info *lsi = s2lsi(sb); + int rc; + ENTRY; + + CDEBUG(D_MOUNT, "Set mgc disk for %s\n", lsi->lsi_lmd->lmd_dev); + + /* cl_mgc_sem in mgc insures we sleep if the mgc_fs is busy */ + rc = obd_set_info_async(NULL, mgc->obd_self_export, + sizeof(KEY_SET_FS), KEY_SET_FS, + sizeof(*sb), sb, NULL); + if (rc != 0) + CERROR("can't set_fs %d\n", rc); + + RETURN(rc); +} + +static int server_mgc_clear_fs(struct obd_device *mgc) +{ + int rc; + ENTRY; + + CDEBUG(D_MOUNT, "Unassign mgc disk\n"); + + rc = obd_set_info_async(NULL, mgc->obd_self_export, + sizeof(KEY_CLEAR_FS), KEY_CLEAR_FS, + 0, NULL, NULL); + RETURN(rc); +} + +static int is_mdc_device(const char *devname) +{ + char *ptr; + + ptr = strrchr(devname, '-'); + if (ptr != NULL && strcmp(ptr, "-mdc") == 0) + return 1; + + return 0; +} + +static inline int tgt_is_mdt0(const char *tgtname) +{ + __u32 idx; + int type; + + type = server_name2index(tgtname, &idx, NULL); + if (type != LDD_F_SV_TYPE_MDT) + return 0; + + return idx == 0; +} + +static inline int is_mdc_for_mdt0(const char *devname) +{ + char *ptr; + + if (!is_mdc_device(devname)) + return 0; + + ptr = strrchr(devname, '-'); + if (ptr == NULL) + return 0; + + *ptr = 0; + if (tgt_is_mdt0(devname)) { + *ptr = '-'; + return 1; + } + *ptr = '-'; + return 0; +} + +/** + * Convert OST/MDT name(fsname-OSTxxxx) to a lwp name + * (fsname-MDT0000-lwp-OSTxxxx) + **/ +int tgt_name2lwpname(const char *svname, char *lwpname) +{ + char *fsname; + const char *tgt; + int rc; + ENTRY; + + OBD_ALLOC(fsname, MTI_NAME_MAXLEN); + if (fsname == NULL) + RETURN(-ENOMEM); + + rc = server_name2fsname(svname, fsname, &tgt); + if (rc != 0) { + CERROR("%s: failed to get fsname from svname. %d\n", + svname, rc); + GOTO(cleanup, rc); + } + + if (*tgt != '-' && *tgt != ':') { + CERROR("%s: invalid svname name!\n", svname); + GOTO(cleanup, rc = -EINVAL); + } + + tgt++; + if (strncmp(tgt, "OST", 3) != 0 && strncmp(tgt, "MDT", 3) != 0) { + CERROR("%s is not an OST or MDT target!\n", svname); + GOTO(cleanup, rc = -EINVAL); + } + sprintf(lwpname, "%s-MDT0000-%s-%s", fsname, LUSTRE_LWP_NAME, tgt); +cleanup: + if (fsname != NULL) + OBD_FREE(fsname, MTI_NAME_MAXLEN); + RETURN(rc); +} +EXPORT_SYMBOL(tgt_name2lwpname); + +static CFS_LIST_HEAD(lwp_register_list); +DEFINE_MUTEX(lwp_register_list_lock); + +int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp, + register_lwp_cb cb_func, void *cb_data) +{ + struct obd_device *lwp; + struct lwp_register_item *lri; + ENTRY; + + LASSERTF(strlen(lwpname) < MTI_NAME_MAXLEN, "lwpname is too long %s\n", + lwpname); + LASSERT(exp != NULL && *exp == NULL); + + OBD_ALLOC_PTR(lri); + if (lri == NULL) + RETURN(-ENOMEM); + + mutex_lock(&lwp_register_list_lock); + + lwp = class_name2obd(lwpname); + if (lwp != NULL && lwp->obd_set_up == 1) { + struct obd_uuid *uuid; + + OBD_ALLOC_PTR(uuid); + if (uuid == NULL) { + mutex_unlock(&lwp_register_list_lock); + OBD_FREE_PTR(lri); + RETURN(-ENOMEM); + } + memcpy(uuid->uuid, lwpname, strlen(lwpname)); + *exp = cfs_hash_lookup(lwp->obd_uuid_hash, uuid); + OBD_FREE_PTR(uuid); + } + + memcpy(lri->lri_name, lwpname, strlen(lwpname)); + lri->lri_exp = exp; + lri->lri_cb_func = cb_func; + lri->lri_cb_data = cb_data; + CFS_INIT_LIST_HEAD(&lri->lri_list); + cfs_list_add(&lri->lri_list, &lwp_register_list); + + if (*exp != NULL && cb_func != NULL) + cb_func(cb_data); + + mutex_unlock(&lwp_register_list_lock); + RETURN(0); +} +EXPORT_SYMBOL(lustre_register_lwp_item); + +void lustre_deregister_lwp_item(struct obd_export **exp) +{ + struct lwp_register_item *lri, *tmp; + + mutex_lock(&lwp_register_list_lock); + cfs_list_for_each_entry_safe(lri, tmp, &lwp_register_list, lri_list) { + if (exp == lri->lri_exp) { + if (*exp) + class_export_put(*exp); + cfs_list_del(&lri->lri_list); + OBD_FREE_PTR(lri); + break; + } + } + mutex_unlock(&lwp_register_list_lock); +} +EXPORT_SYMBOL(lustre_deregister_lwp_item); + +static void lustre_notify_lwp_list(struct obd_export *exp) +{ + struct lwp_register_item *lri, *tmp; + LASSERT(exp != NULL); + + mutex_lock(&lwp_register_list_lock); + cfs_list_for_each_entry_safe(lri, tmp, &lwp_register_list, lri_list) { + if (strcmp(exp->exp_obd->obd_name, lri->lri_name)) + continue; + if (*lri->lri_exp != NULL) + continue; + *lri->lri_exp = class_export_get(exp); + if (lri->lri_cb_func != NULL) + lri->lri_cb_func(lri->lri_cb_data); + } + mutex_unlock(&lwp_register_list_lock); +} + +static int lustre_lwp_connect(struct obd_device *lwp) +{ + struct lu_env env; + struct lu_context session_ctx; + struct obd_export *exp; + struct obd_uuid *uuid = NULL; + struct obd_connect_data *data = NULL; + int rc; + ENTRY; + + /* log has been fully processed, let clients connect */ + rc = lu_env_init(&env, lwp->obd_lu_dev->ld_type->ldt_ctx_tags); + if (rc != 0) + RETURN(rc); + + lu_context_init(&session_ctx, LCT_SESSION); + session_ctx.lc_thread = NULL; + lu_context_enter(&session_ctx); + env.le_ses = &session_ctx; + + OBD_ALLOC_PTR(data); + if (data == NULL) + GOTO(out, rc = -ENOMEM); + + data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_INDEX; + data->ocd_version = LUSTRE_VERSION_CODE; + data->ocd_connect_flags |= OBD_CONNECT_MDS_MDS | OBD_CONNECT_FID | + OBD_CONNECT_AT | OBD_CONNECT_LRU_RESIZE | + OBD_CONNECT_FULL20 | OBD_CONNECT_LVB_TYPE | + OBD_CONNECT_LIGHTWEIGHT | + OBD_CONNECT_PINGLESS; + OBD_ALLOC_PTR(uuid); + if (uuid == NULL) + GOTO(out, rc = -ENOMEM); + + if (strlen(lwp->obd_name) > sizeof(uuid->uuid)) { + CERROR("%s: Too long lwp name %s, max_size is %d\n", + lwp->obd_name, lwp->obd_name, (int)sizeof(uuid->uuid)); + GOTO(out, rc = -EINVAL); + } + + /* Use lwp name as the uuid, so we find the export by lwp name later */ + memcpy(uuid->uuid, lwp->obd_name, strlen(lwp->obd_name)); + rc = obd_connect(&env, &exp, lwp, uuid, data, NULL); + if (rc != 0) + CERROR("%s: connect failed: rc = %d\n", lwp->obd_name, rc); + else + lustre_notify_lwp_list(exp); + +out: + if (data != NULL) + OBD_FREE_PTR(data); + if (uuid != NULL) + OBD_FREE_PTR(uuid); + + lu_env_fini(&env); + lu_context_exit(&session_ctx); + lu_context_fini(&session_ctx); + + RETURN(rc); +} + +/** + * lwp is used by slaves (Non-MDT0 targets) to manage the connection + * to MDT0. + **/ +static int lustre_lwp_setup(struct lustre_cfg *lcfg, struct lustre_sb_info *lsi) +{ + struct obd_connect_data *data = NULL; + struct obd_device *obd; + char *lwpname = NULL; + char *lwpuuid = NULL; + int rc; + ENTRY; + + rc = class_add_uuid(lustre_cfg_string(lcfg, 1), + lcfg->lcfg_nid); + if (rc) { + CERROR("%s: Can't add uuid: rc =%d\n", lsi->lsi_svname, rc); + GOTO(out, rc); + } + + OBD_ALLOC(lwpname, MTI_NAME_MAXLEN); + if (lwpname == NULL) + GOTO(out, rc = -ENOMEM); + + rc = tgt_name2lwpname(lsi->lsi_svname, lwpname); + if (rc != 0) { + CERROR("%s: failed to generate lwp name. %d\n", + lsi->lsi_svname, rc); + GOTO(out, rc); + } + + OBD_ALLOC(lwpuuid, MTI_NAME_MAXLEN); + if (lwpuuid == NULL) + GOTO(out, rc = -ENOMEM); + + sprintf(lwpuuid, "%s_UUID", lwpname); + rc = lustre_start_simple(lwpname, LUSTRE_LWP_NAME, + lwpuuid, lustre_cfg_string(lcfg, 1), + 0, 0, 0); + if (rc) { + CERROR("%s: setup up failed: rc %d\n", lwpname, rc); + GOTO(out, rc); + } + + obd = class_name2obd(lwpname); + LASSERT(obd != NULL); + + rc = lustre_lwp_connect(obd); + if (rc != 0) + CERROR("%s: connect failed: rc = %d\n", lwpname, rc); +out: + if (data != NULL) + OBD_FREE_PTR(data); + if (lwpname != NULL) + OBD_FREE(lwpname, MTI_NAME_MAXLEN); + if (lwpuuid != NULL) + OBD_FREE(lwpuuid, MTI_NAME_MAXLEN); + + RETURN(rc); +} + +/* the caller is responsible for memory free */ +static struct obd_device *lustre_find_lwp(struct lustre_sb_info *lsi, + char **lwpname, char **logname) +{ + struct obd_device *lwp; + int rc = 0; + ENTRY; + + LASSERT(lwpname != NULL); + LASSERT(IS_OST(lsi) || IS_MDT(lsi)); + + OBD_ALLOC(*lwpname, MTI_NAME_MAXLEN); + if (*lwpname == NULL) + RETURN(ERR_PTR(-ENOMEM)); + + if (logname != NULL) { + OBD_ALLOC(*logname, MTI_NAME_MAXLEN); + if (*logname == NULL) + GOTO(out, rc = -ENOMEM); + rc = server_name2fsname(lsi->lsi_svname, *lwpname, NULL); + if (rc != 0) { + CERROR("%s: failed to get fsname from svname. %d\n", + lsi->lsi_svname, rc); + GOTO(out, rc = -EINVAL); + } + sprintf(*logname, "%s-client", *lwpname); + } + + rc = tgt_name2lwpname(lsi->lsi_svname, *lwpname); + if (rc != 0) { + CERROR("%s: failed to generate lwp name. %d\n", + lsi->lsi_svname, rc); + GOTO(out, rc = -EINVAL); + } + + lwp = class_name2obd(*lwpname); + +out: + if (rc != 0) { + if (*lwpname != NULL) { + OBD_FREE(*lwpname, MTI_NAME_MAXLEN); + *lwpname = NULL; + } + if (logname != NULL && *logname != NULL) { + OBD_FREE(*logname, MTI_NAME_MAXLEN); + *logname = NULL; + } + lwp = ERR_PTR(rc); + } + + RETURN(lwp != NULL ? lwp : ERR_PTR(-ENOENT)); +} + +static int lustre_lwp_add_conn(struct lustre_cfg *cfg, + struct lustre_sb_info *lsi) +{ + struct lustre_cfg_bufs *bufs = NULL; + struct lustre_cfg *lcfg = NULL; + char *lwpname = NULL; + struct obd_device *lwp; + int rc; + ENTRY; + + lwp = lustre_find_lwp(lsi, &lwpname, NULL); + if (IS_ERR(lwp)) { + CERROR("%s: can't find lwp device.\n", lsi->lsi_svname); + GOTO(out, rc = PTR_ERR(lwp)); + } + LASSERT(lwpname != NULL); + + OBD_ALLOC_PTR(bufs); + if (bufs == NULL) + GOTO(out, rc = -ENOMEM); + + lustre_cfg_bufs_reset(bufs, lwpname); + lustre_cfg_bufs_set_string(bufs, 1, + lustre_cfg_string(cfg, 1)); + + lcfg = lustre_cfg_new(LCFG_ADD_CONN, bufs); + + rc = class_add_conn(lwp, lcfg); + if (rc) + CERROR("%s: can't add conn: rc = %d\n", lwpname, rc); + +out: + if (bufs != NULL) + OBD_FREE_PTR(bufs); + if (lcfg != NULL) + lustre_cfg_free(lcfg); + if (lwpname != NULL) + OBD_FREE(lwpname, MTI_NAME_MAXLEN); + RETURN(rc); +} + +/** + * Retrieve MDT nids from the client log, then start the lwp device. + * there are only two scenarios which would include mdt nid. + * 1. + * marker 5 (flags=0x01, v2.1.54.0) lustre-MDT0000 'add mdc' xxx- + * add_uuid nid=192.168.122.162@tcp(0x20000c0a87aa2) 0: 1:192.168.122.162@tcp + * attach 0:lustre-MDT0000-mdc 1:mdc 2:lustre-clilmv_UUID + * setup 0:lustre-MDT0000-mdc 1:lustre-MDT0000_UUID 2:192.168.122.162@tcp + * add_uuid nid=192.168.172.1@tcp(0x20000c0a8ac01) 0: 1:192.168.172.1@tcp + * add_conn 0:lustre-MDT0000-mdc 1:192.168.172.1@tcp + * modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID xxxx + * marker 5 (flags=0x02, v2.1.54.0) lustre-MDT0000 'add mdc' xxxx- + * 2. + * marker 7 (flags=0x01, v2.1.54.0) lustre-MDT0000 'add failnid' xxxx- + * add_uuid nid=192.168.122.2@tcp(0x20000c0a87a02) 0: 1:192.168.122.2@tcp + * add_conn 0:lustre-MDT0000-mdc 1:192.168.122.2@tcp + * marker 7 (flags=0x02, v2.1.54.0) lustre-MDT0000 'add failnid' xxxx- + **/ +static int client_lwp_config_process(const struct lu_env *env, + struct llog_handle *handle, + struct llog_rec_hdr *rec, void *data) +{ + struct config_llog_instance *clli = data; + int cfg_len = rec->lrh_len; + char *cfg_buf = (char *) (rec + 1); + struct lustre_cfg *lcfg = NULL; + struct lustre_sb_info *lsi; + int rc = 0, swab = 0; + ENTRY; + + if (rec->lrh_type != OBD_CFG_REC) { + CERROR("Unknown llog record type %#x encountered\n", + rec->lrh_type); + RETURN(-EINVAL); + } + + LASSERT(clli->cfg_sb != NULL); + lsi = s2lsi(clli->cfg_sb); + + lcfg = (struct lustre_cfg *)cfg_buf; + if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) { + lustre_swab_lustre_cfg(lcfg); + swab = 1; + } + + rc = lustre_cfg_sanity_check(cfg_buf, cfg_len); + if (rc) + GOTO(out, rc); + + switch (lcfg->lcfg_command) { + case LCFG_MARKER: { + struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1); + + lustre_swab_cfg_marker(marker, swab, + LUSTRE_CFG_BUFLEN(lcfg, 1)); + if (marker->cm_flags & CM_SKIP || + marker->cm_flags & CM_EXCLUDE) + GOTO(out, rc = 0); + + if (!tgt_is_mdt0(marker->cm_tgtname)) + GOTO(out, rc = 0); + + if (!strncmp(marker->cm_comment, "add mdc", 7) || + !strncmp(marker->cm_comment, "add failnid", 11)) { + if (marker->cm_flags & CM_START) { + clli->cfg_flags = CFG_F_MARKER; + /* This hack is to differentiate the + * ADD_UUID is come from "add mdc" record + * or from "add failnid" record. */ + if (!strncmp(marker->cm_comment, + "add failnid", 11)) + clli->cfg_flags |= CFG_F_SKIP; + } else if (marker->cm_flags & CM_END) { + clli->cfg_flags = 0; + } + } + break; + } + case LCFG_ADD_UUID: { + if (clli->cfg_flags == CFG_F_MARKER) { + rc = lustre_lwp_setup(lcfg, lsi); + /* XXX: process only the first nid as + * we don't need another instance of lwp */ + clli->cfg_flags |= CFG_F_SKIP; + } else if (clli->cfg_flags == (CFG_F_MARKER | CFG_F_SKIP)) { + rc = class_add_uuid(lustre_cfg_string(lcfg, 1), + lcfg->lcfg_nid); + if (rc) + CERROR("%s: Fail to add uuid, rc:%d\n", + lsi->lsi_svname, rc); + } + break; + } + case LCFG_ADD_CONN: { + if (is_mdc_for_mdt0(lustre_cfg_string(lcfg, 0))) + rc = lustre_lwp_add_conn(lcfg, lsi); + break; + } + default: + break; + } +out: + RETURN(rc); +} + +static int lustre_disconnect_lwp(struct super_block *sb) +{ + struct lustre_sb_info *lsi = s2lsi(sb); + struct obd_device *lwp; + char *lwpname = NULL; + char *logname = NULL; + struct lustre_cfg *lcfg = NULL; + struct lustre_cfg_bufs *bufs = NULL; + struct config_llog_instance *cfg = NULL; + int rc; + ENTRY; + + lwp = lustre_find_lwp(lsi, &lwpname, &logname); + if (IS_ERR(lwp) && PTR_ERR(lwp) != -ENOENT) + GOTO(out, rc = PTR_ERR(lwp)); + + LASSERT(lwpname != NULL); + LASSERT(logname != NULL); + + OBD_ALLOC_PTR(cfg); + if (cfg == NULL) + GOTO(out, rc = -ENOMEM); + + /* end log first */ + cfg->cfg_instance = sb; + rc = lustre_end_log(sb, logname, cfg); + if (rc != 0) { + CERROR("%s: Can't end config log %s.\n", lwpname, logname); + GOTO(out, rc); + } + + if (PTR_ERR(lwp) == -ENOENT) { + CDEBUG(D_CONFIG, "%s: lwp device wasn't started.\n", + lsi->lsi_svname); + GOTO(out, rc = 0); + } + + OBD_ALLOC_PTR(bufs); + if (bufs == NULL) + GOTO(out, rc = -ENOMEM); + + lustre_cfg_bufs_reset(bufs, lwp->obd_name); + lustre_cfg_bufs_set_string(bufs, 1, NULL); + lcfg = lustre_cfg_new(LCFG_CLEANUP, bufs); + if (!lcfg) + GOTO(out, rc = -ENOMEM); + + /* Disconnect import first. NULL is passed for the '@env', since + * it will not be used. */ + rc = lwp->obd_lu_dev->ld_ops->ldo_process_config(NULL, lwp->obd_lu_dev, + lcfg); +out: + if (lcfg) + lustre_cfg_free(lcfg); + if (bufs) + OBD_FREE_PTR(bufs); + if (cfg) + OBD_FREE_PTR(cfg); + if (lwpname) + OBD_FREE(lwpname, MTI_NAME_MAXLEN); + if (logname) + OBD_FREE(logname, MTI_NAME_MAXLEN); + RETURN(rc); +} + +/** + * Stop the lwp for an OST/MDT target. + **/ +static int lustre_stop_lwp(struct super_block *sb) +{ + struct lustre_sb_info *lsi = s2lsi(sb); + struct obd_device *lwp = NULL; + char *lwpname = NULL; + int rc = 0; + ENTRY; + + lwp = lustre_find_lwp(lsi, &lwpname, NULL); + if (IS_ERR(lwp)) { + CDEBUG(PTR_ERR(lwp) == -ENOENT ? D_CONFIG : D_ERROR, + "%s: lwp wasn't started.\n", lsi->lsi_svname); + GOTO(out, rc = 0); + } + + lwp->obd_force = 1; + rc = class_manual_cleanup(lwp); + +out: + if (lwpname != NULL) + OBD_FREE(lwpname, MTI_NAME_MAXLEN); + RETURN(rc); +} + +/** + * Start the lwp(fsname-MDT0000-lwp-OSTxxxx) for an OST or MDT target, + * which would be used to establish connection from OST to MDT0. + **/ +static int lustre_start_lwp(struct super_block *sb) +{ + struct lustre_sb_info *lsi = s2lsi(sb); + struct config_llog_instance *cfg = NULL; + struct obd_device *lwp; + char *lwpname = NULL; + char *logname = NULL; + int rc; + ENTRY; + + lwp = lustre_find_lwp(lsi, &lwpname, &logname); + + /* the lwp device already stared */ + if (lwp && !IS_ERR(lwp)) + GOTO(out, rc = 0); + + if (PTR_ERR(lwp) != -ENOENT) + GOTO(out, rc = PTR_ERR(lwp)); + + LASSERT(lwpname != NULL); + LASSERT(logname != NULL); + + OBD_ALLOC_PTR(cfg); + if (cfg == NULL) + GOTO(out, rc = -ENOMEM); + + cfg->cfg_callback = client_lwp_config_process; + cfg->cfg_instance = sb; + + rc = lustre_process_log(sb, logname, cfg); +out: + if (lwpname != NULL) + OBD_FREE(lwpname, MTI_NAME_MAXLEN); + if (logname != NULL) + OBD_FREE(logname, MTI_NAME_MAXLEN); + if (cfg != NULL) + OBD_FREE_PTR(cfg); + RETURN(rc); +} + +DEFINE_MUTEX(server_start_lock); + +/* Stop MDS/OSS if nobody is using them */ +static int server_stop_servers(int lsiflags) +{ + struct obd_device *obd = NULL; + struct obd_type *type = NULL; + int rc = 0; + ENTRY; + + mutex_lock(&server_start_lock); + + /* Either an MDT or an OST or neither */ + /* if this was an MDT, and there are no more MDT's, clean up the MDS */ + if (lsiflags & LDD_F_SV_TYPE_MDT) { + obd = class_name2obd(LUSTRE_MDS_OBDNAME); + if (obd != NULL) + type = class_search_type(LUSTRE_MDT_NAME); + } + + /* if this was an OST, and there are no more OST's, clean up the OSS */ + if (lsiflags & LDD_F_SV_TYPE_OST) { + obd = class_name2obd(LUSTRE_OSS_OBDNAME); + if (obd != NULL) + type = class_search_type(LUSTRE_OST_NAME); + } + + if (obd != NULL && (type == NULL || type->typ_refcnt == 0)) { + int err; + + obd->obd_force = 1; + /* obd_fail doesn't mean much on a server obd */ + err = class_manual_cleanup(obd); + if (rc != 0) + rc = err; + } + + mutex_unlock(&server_start_lock); + + RETURN(rc); +} + +int server_mti_print(const char *title, struct mgs_target_info *mti) +{ + PRINT_CMD(PRINT_MASK, "mti %s\n", title); + PRINT_CMD(PRINT_MASK, "server: %s\n", mti->mti_svname); + PRINT_CMD(PRINT_MASK, "fs: %s\n", mti->mti_fsname); + PRINT_CMD(PRINT_MASK, "uuid: %s\n", mti->mti_uuid); + PRINT_CMD(PRINT_MASK, "ver: %d flags: %#x\n", + mti->mti_config_ver, mti->mti_flags); + return 0; +} +EXPORT_SYMBOL(server_mti_print); + +/* Generate data for registration */ +static int server_lsi2mti(struct lustre_sb_info *lsi, + struct mgs_target_info *mti) +{ + lnet_process_id_t id; + int rc, i = 0; + int cplen = 0; + ENTRY; + + if (!IS_SERVER(lsi)) + RETURN(-EINVAL); + + if (strlcpy(mti->mti_svname, lsi->lsi_svname, sizeof(mti->mti_svname)) + >= sizeof(mti->mti_svname)) + RETURN(-E2BIG); + + mti->mti_nid_count = 0; + while (LNetGetId(i++, &id) != -ENOENT) { + if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND) + continue; + + /* server use --servicenode param, only allow specified + * nids be registered */ + if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) != 0 && + class_match_nid(lsi->lsi_lmd->lmd_params, + PARAM_FAILNODE, id.nid) < 1) + continue; + + /* match specified network */ + if (!class_match_net(lsi->lsi_lmd->lmd_params, + PARAM_NETWORK, LNET_NIDNET(id.nid))) + continue; + + mti->mti_nids[mti->mti_nid_count] = id.nid; + mti->mti_nid_count++; + if (mti->mti_nid_count >= MTI_NIDS_MAX) { + CWARN("Only using first %d nids for %s\n", + mti->mti_nid_count, mti->mti_svname); + break; + } + } + + mti->mti_lustre_ver = LUSTRE_VERSION_CODE; + mti->mti_config_ver = 0; + + rc = server_name2fsname(lsi->lsi_svname, mti->mti_fsname, NULL); + if (rc != 0) + return rc; + + rc = server_name2index(lsi->lsi_svname, &mti->mti_stripe_index, NULL); + if (rc < 0) + return rc; + /* Orion requires index to be set */ + LASSERT(!(rc & LDD_F_NEED_INDEX)); + /* keep only LDD flags */ + mti->mti_flags = lsi->lsi_flags & LDD_F_MASK; + if (mti->mti_flags & (LDD_F_WRITECONF | LDD_F_VIRGIN)) + mti->mti_flags |= LDD_F_UPDATE; + cplen = strlcpy(mti->mti_params, lsi->lsi_lmd->lmd_params, + sizeof(mti->mti_params)); + if (cplen >= sizeof(mti->mti_params)) + return -E2BIG; + return 0; +} + +/* Register an old or new target with the MGS. If needed MGS will construct + startup logs and assign index */ +static int server_register_target(struct lustre_sb_info *lsi) +{ + struct obd_device *mgc = lsi->lsi_mgc; + struct mgs_target_info *mti = NULL; + bool writeconf; + int rc; + ENTRY; + + LASSERT(mgc); + + if (!IS_SERVER(lsi)) + RETURN(-EINVAL); + + OBD_ALLOC_PTR(mti); + if (!mti) + RETURN(-ENOMEM); + + rc = server_lsi2mti(lsi, mti); + if (rc) + GOTO(out, rc); + + CDEBUG(D_MOUNT, "Registration %s, fs=%s, %s, index=%04x, flags=%#x\n", + mti->mti_svname, mti->mti_fsname, + libcfs_nid2str(mti->mti_nids[0]), mti->mti_stripe_index, + mti->mti_flags); + + /* if write_conf is true, the registration must succeed */ + writeconf = !!(lsi->lsi_flags & (LDD_F_NEED_INDEX | LDD_F_UPDATE)); + mti->mti_flags |= LDD_F_OPC_REG; + + /* Register the target */ + /* FIXME use mgc_process_config instead */ + rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp, + sizeof(KEY_REGISTER_TARGET), + KEY_REGISTER_TARGET, + sizeof(*mti), mti, NULL); + if (rc) { + if (mti->mti_flags & LDD_F_ERROR) { + LCONSOLE_ERROR_MSG(0x160, + "%s: the MGS refuses to allow this server " + "to start: rc = %d. Please see messages on " + "the MGS.\n", lsi->lsi_svname, rc); + } else if (writeconf) { + LCONSOLE_ERROR_MSG(0x15f, + "%s: cannot register this server with the MGS: " + "rc = %d. Is the MGS running?\n", + lsi->lsi_svname, rc); + } else { + CERROR("%s: error registering with the MGS: rc = %d " + "(not fatal)\n", lsi->lsi_svname, rc); + /* reset the error code for non-fatal error. */ + rc = 0; + } + GOTO(out, rc); + } + +out: + if (mti) + OBD_FREE_PTR(mti); + RETURN(rc); +} + +/** + * Notify the MGS that this target is ready. + * Used by IR - if the MGS receives this message, it will notify clients. + */ +static int server_notify_target(struct super_block *sb, struct obd_device *obd) +{ + struct lustre_sb_info *lsi = s2lsi(sb); + struct obd_device *mgc = lsi->lsi_mgc; + struct mgs_target_info *mti = NULL; + int rc; + ENTRY; + + LASSERT(mgc); + + if (!(IS_SERVER(lsi))) + RETURN(-EINVAL); + + OBD_ALLOC_PTR(mti); + if (!mti) + RETURN(-ENOMEM); + rc = server_lsi2mti(lsi, mti); + if (rc) + GOTO(out, rc); + + mti->mti_instance = obd->u.obt.obt_instance; + mti->mti_flags |= LDD_F_OPC_READY; + + /* FIXME use mgc_process_config instead */ + rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp, + sizeof(KEY_REGISTER_TARGET), + KEY_REGISTER_TARGET, + sizeof(*mti), mti, NULL); + + /* Imperative recovery: if the mgs informs us to use IR? */ + if (!rc && !(mti->mti_flags & LDD_F_ERROR) && + (mti->mti_flags & LDD_F_IR_CAPABLE)) + lsi->lsi_flags |= LDD_F_IR_CAPABLE; + +out: + if (mti) + OBD_FREE_PTR(mti); + RETURN(rc); + +} + +/** Start server targets: MDTs and OSTs + */ +static int server_start_targets(struct super_block *sb, struct vfsmount *mnt) +{ + struct obd_device *obd; + struct lustre_sb_info *lsi = s2lsi(sb); + struct config_llog_instance cfg; + struct lu_env env; + struct lu_device *dev; + int rc; + ENTRY; + + CDEBUG(D_MOUNT, "starting target %s\n", lsi->lsi_svname); + + if (IS_MDT(lsi)) { + /* make sure the MDS is started */ + mutex_lock(&server_start_lock); + obd = class_name2obd(LUSTRE_MDS_OBDNAME); + if (!obd) { + rc = lustre_start_simple(LUSTRE_MDS_OBDNAME, + LUSTRE_MDS_NAME, + LUSTRE_MDS_OBDNAME"_uuid", + 0, 0, 0, 0); + if (rc) { + mutex_unlock(&server_start_lock); + CERROR("failed to start MDS: %d\n", rc); + RETURN(rc); + } + } + mutex_unlock(&server_start_lock); + } + + /* If we're an OST, make sure the global OSS is running */ + if (IS_OST(lsi)) { + /* make sure OSS is started */ + mutex_lock(&server_start_lock); + obd = class_name2obd(LUSTRE_OSS_OBDNAME); + if (!obd) { + rc = lustre_start_simple(LUSTRE_OSS_OBDNAME, + LUSTRE_OSS_NAME, + LUSTRE_OSS_OBDNAME"_uuid", + 0, 0, 0, 0); + if (rc) { + mutex_unlock(&server_start_lock); + CERROR("failed to start OSS: %d\n", rc); + RETURN(rc); + } + } + mutex_unlock(&server_start_lock); + } + + /* Set the mgc fs to our server disk. This allows the MGC to + * read and write configs locally, in case it can't talk to the MGS. */ + if (lsi->lsi_srv_mnt) { + rc = server_mgc_set_fs(lsi->lsi_mgc, sb); + if (rc) + GOTO(out_stop_service, rc); + } + + /* Register with MGS */ + rc = server_register_target(lsi); + if (rc) + GOTO(out_mgc, rc); + + /* Let the target look up the mount using the target's name + (we can't pass the sb or mnt through class_process_config.) */ + rc = server_register_mount(lsi->lsi_svname, sb, mnt); + if (rc) + GOTO(out_mgc, rc); + + /* Start targets using the llog named for the target */ + memset(&cfg, 0, sizeof(cfg)); + cfg.cfg_callback = class_config_llog_handler; + rc = lustre_process_log(sb, lsi->lsi_svname, &cfg); + if (rc) { + CERROR("failed to start server %s: %d\n", + lsi->lsi_svname, rc); + /* Do NOT call server_deregister_mount() here. This makes it + * impossible to find mount later in cleanup time and leaves + * @lsi and othder stuff leaked. -umka */ + GOTO(out_mgc, rc); + } + + obd = class_name2obd(lsi->lsi_svname); + if (!obd) { + CERROR("no server named %s was started\n", lsi->lsi_svname); + GOTO(out_mgc, rc = -ENXIO); + } + + if (IS_OST(lsi) || IS_MDT(lsi)) { + rc = lustre_start_lwp(sb); + if (rc) { + CERROR("%s: failed to start LWP: %d\n", + lsi->lsi_svname, rc); + GOTO(out_mgc, rc); + } + } + + server_notify_target(sb, obd); + + /* calculate recovery timeout, do it after lustre_process_log */ + server_calc_timeout(lsi, obd); + + /* log has been fully processed */ + obd_notify(obd, NULL, OBD_NOTIFY_CONFIG, (void *)CONFIG_LOG); + + /* log has been fully processed, let clients connect */ + dev = obd->obd_lu_dev; + if (dev && dev->ld_ops->ldo_prepare) { + rc = lu_env_init(&env, dev->ld_type->ldt_ctx_tags); + if (rc == 0) { + struct lu_context session_ctx; + + lu_context_init(&session_ctx, LCT_SESSION); + session_ctx.lc_thread = NULL; + lu_context_enter(&session_ctx); + env.le_ses = &session_ctx; + + rc = dev->ld_ops->ldo_prepare(&env, NULL, dev); + + lu_env_fini(&env); + lu_context_exit(&session_ctx); + lu_context_fini(&session_ctx); + } + } + + /* abort recovery only on the complete stack: + * many devices can be involved */ + if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_ABORT_RECOV) && + (OBP(obd, iocontrol))) { + obd_iocontrol(OBD_IOC_ABORT_RECOVERY, obd->obd_self_export, 0, + NULL, NULL); + } + +out_mgc: + /* Release the mgc fs for others to use */ + if (lsi->lsi_srv_mnt) + server_mgc_clear_fs(lsi->lsi_mgc); + +out_stop_service: + if (rc != 0) + server_stop_servers(lsi->lsi_flags); + + RETURN(rc); +} + +static int lsi_prepare(struct lustre_sb_info *lsi) +{ + __u32 index; + int rc; + ENTRY; + + LASSERT(lsi); + LASSERT(lsi->lsi_lmd); + + /* The server name is given as a mount line option */ + if (lsi->lsi_lmd->lmd_profile == NULL) { + LCONSOLE_ERROR("Can't determine server name\n"); + RETURN(-EINVAL); + } + + if (strlen(lsi->lsi_lmd->lmd_profile) >= sizeof(lsi->lsi_svname)) + RETURN(-ENAMETOOLONG); + + strcpy(lsi->lsi_svname, lsi->lsi_lmd->lmd_profile); + + /* Determine osd type */ + if (lsi->lsi_lmd->lmd_osd_type != NULL) { + if (strlen(lsi->lsi_lmd->lmd_osd_type) >= + sizeof(lsi->lsi_osd_type)) + RETURN(-ENAMETOOLONG); + + strcpy(lsi->lsi_osd_type, lsi->lsi_lmd->lmd_osd_type); + } else { + strcpy(lsi->lsi_osd_type, LUSTRE_OSD_LDISKFS_NAME); + } + + /* XXX: a temp. solution for components using fsfilt + * to be removed in one of the subsequent patches */ + if (!strcmp(lsi->lsi_lmd->lmd_osd_type, "osd-ldiskfs")) + strcpy(lsi->lsi_fstype, "ldiskfs"); + else + strcpy(lsi->lsi_fstype, lsi->lsi_lmd->lmd_osd_type); + + /* Determine server type */ + rc = server_name2index(lsi->lsi_svname, &index, NULL); + if (rc < 0) { + if (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) { + /* Assume we're a bare MGS */ + rc = 0; + lsi->lsi_lmd->lmd_flags |= LMD_FLG_NOSVC; + } else { + LCONSOLE_ERROR("Can't determine server type of '%s'\n", + lsi->lsi_svname); + RETURN(rc); + } + } + lsi->lsi_flags |= rc; + + /* Add mount line flags that used to be in ldd: + * writeconf, mgs, anything else? + */ + lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_WRITECONF) ? + LDD_F_WRITECONF : 0; + lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_VIRGIN) ? + LDD_F_VIRGIN : 0; + lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) ? + LDD_F_SV_TYPE_MGS : 0; + lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) ? + LDD_F_NO_PRIMNODE : 0; + + RETURN(0); +} + +/*************** server mount ******************/ + +/** Start the shutdown of servers at umount. + */ +static void server_put_super(struct super_block *sb) +{ + struct lustre_sb_info *lsi = s2lsi(sb); + struct obd_device *obd; + char *tmpname, *extraname = NULL; + int tmpname_sz; + int lsiflags = lsi->lsi_flags; + ENTRY; + + LASSERT(IS_SERVER(lsi)); + + tmpname_sz = strlen(lsi->lsi_svname) + 1; + OBD_ALLOC(tmpname, tmpname_sz); + memcpy(tmpname, lsi->lsi_svname, tmpname_sz); + CDEBUG(D_MOUNT, "server put_super %s\n", tmpname); + if (IS_MDT(lsi) && (lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC)) + snprintf(tmpname, tmpname_sz, "MGS"); + + /* disconnect the lwp first to drain off the inflight request */ + if (IS_OST(lsi) || IS_MDT(lsi)) { + int rc; + + rc = lustre_disconnect_lwp(sb); + if (rc && rc != ETIMEDOUT) + CERROR("%s: failed to disconnect lwp. (rc=%d)\n", + tmpname, rc); + } + + /* Stop the target */ + if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) && + (IS_MDT(lsi) || IS_OST(lsi))) { + struct lustre_profile *lprof = NULL; + + /* tell the mgc to drop the config log */ + lustre_end_log(sb, lsi->lsi_svname, NULL); + + /* COMPAT_146 - profile may get deleted in mgc_cleanup. + If there are any setup/cleanup errors, save the lov + name for safety cleanup later. */ + lprof = class_get_profile(lsi->lsi_svname); + if (lprof && lprof->lp_dt) { + OBD_ALLOC(extraname, strlen(lprof->lp_dt) + 1); + strcpy(extraname, lprof->lp_dt); + } + + obd = class_name2obd(lsi->lsi_svname); + if (obd) { + CDEBUG(D_MOUNT, "stopping %s\n", obd->obd_name); + if (lsiflags & LSI_UMOUNT_FAILOVER) + obd->obd_fail = 1; + /* We can't seem to give an error return code + * to .put_super, so we better make sure we clean up! */ + obd->obd_force = 1; + class_manual_cleanup(obd); + } else { + CERROR("no obd %s\n", lsi->lsi_svname); + server_deregister_mount(lsi->lsi_svname); + } + } + + /* If they wanted the mgs to stop separately from the mdt, they + should have put it on a different device. */ + if (IS_MGS(lsi)) { + /* if MDS start with --nomgs, don't stop MGS then */ + if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)) + server_stop_mgs(sb); + } + + if (IS_OST(lsi) || IS_MDT(lsi)) { + if (lustre_stop_lwp(sb) < 0) + CERROR("%s: failed to stop lwp!\n", tmpname); + } + + /* Clean the mgc and sb */ + lustre_common_put_super(sb); + + /* wait till all in-progress cleanups are done + * specifically we're interested in ofd cleanup + * as it pins OSS */ + obd_zombie_barrier(); + + /* Stop the servers (MDS, OSS) if no longer needed. We must wait + until the target is really gone so that our type refcount check + is right. */ + server_stop_servers(lsiflags); + + /* In case of startup or cleanup err, stop related obds */ + if (extraname) { + obd = class_name2obd(extraname); + if (obd) { + CWARN("Cleaning orphaned obd %s\n", extraname); + obd->obd_force = 1; + class_manual_cleanup(obd); + } + OBD_FREE(extraname, strlen(extraname) + 1); + } + + LCONSOLE_WARN("server umount %s complete\n", tmpname); + OBD_FREE(tmpname, tmpname_sz); + EXIT; +} + +/** Called only for 'umount -f' + */ +static void server_umount_begin(struct super_block *sb) +{ + struct lustre_sb_info *lsi = s2lsi(sb); + ENTRY; + + CDEBUG(D_MOUNT, "umount -f\n"); + /* umount = failover + umount -f = force + no third way to do non-force, non-failover */ + lsi->lsi_flags &= ~LSI_UMOUNT_FAILOVER; + EXIT; +} + +static int server_statfs(struct dentry *dentry, struct kstatfs *buf) +{ + struct super_block *sb = dentry->d_sb; + struct lustre_sb_info *lsi = s2lsi(sb); + struct obd_statfs statfs; + int rc; + ENTRY; + + if (lsi->lsi_dt_dev) { + rc = dt_statfs(NULL, lsi->lsi_dt_dev, &statfs); + if (rc == 0) { + statfs_unpack(buf, &statfs); + buf->f_type = sb->s_magic; + RETURN(0); + } + } + + /* just return 0 */ + buf->f_type = sb->s_magic; + buf->f_bsize = sb->s_blocksize; + buf->f_blocks = 1; + buf->f_bfree = 0; + buf->f_bavail = 0; + buf->f_files = 1; + buf->f_ffree = 0; + buf->f_namelen = NAME_MAX; + RETURN(0); +} + +/** The operations we support directly on the superblock: + * mount, umount, and df. + */ +static struct super_operations server_ops = { + .put_super = server_put_super, + .umount_begin = server_umount_begin, /* umount -f */ + .statfs = server_statfs, +}; + +#define log2(n) ffz(~(n)) +#define LUSTRE_SUPER_MAGIC 0x0BD00BD1 + +static int server_fill_super_common(struct super_block *sb) +{ + struct inode *root = 0; + ENTRY; + + CDEBUG(D_MOUNT, "Server sb, dev=%d\n", (int)sb->s_dev); + + sb->s_blocksize = 4096; + sb->s_blocksize_bits = log2(sb->s_blocksize); + sb->s_magic = LUSTRE_SUPER_MAGIC; + sb->s_maxbytes = 0; /* we don't allow file IO on server mountpoints */ + sb->s_flags |= MS_RDONLY; + sb->s_op = &server_ops; + + root = new_inode(sb); + if (!root) { + CERROR("Can't make root inode\n"); + RETURN(-EIO); + } + + /* returns -EIO for every operation */ + /* make_bad_inode(root); -- badness - can't umount */ + /* apparently we need to be a directory for the mount to finish */ + root->i_mode = S_IFDIR; + + sb->s_root = d_make_root(root); + if (!sb->s_root) { + CERROR("%s: can't make root dentry\n", sb->s_id); + RETURN(-EIO); + } + + RETURN(0); +} + +static int osd_start(struct lustre_sb_info *lsi, unsigned long mflags) +{ + struct lustre_mount_data *lmd = lsi->lsi_lmd; + struct obd_device *obd; + struct dt_device_param p; + char flagstr[16]; + int rc; + ENTRY; + + CDEBUG(D_MOUNT, + "Attempting to start %s, type=%s, lsifl=%x, mountfl=%lx\n", + lsi->lsi_svname, lsi->lsi_osd_type, lsi->lsi_flags, mflags); + + sprintf(lsi->lsi_osd_obdname, "%s-osd", lsi->lsi_svname); + strcpy(lsi->lsi_osd_uuid, lsi->lsi_osd_obdname); + strcat(lsi->lsi_osd_uuid, "_UUID"); + sprintf(flagstr, "%lu:%lu", mflags, (unsigned long) lmd->lmd_flags); + + obd = class_name2obd(lsi->lsi_osd_obdname); + if (obd == NULL) { + rc = lustre_start_simple(lsi->lsi_osd_obdname, + lsi->lsi_osd_type, + lsi->lsi_osd_uuid, lmd->lmd_dev, + flagstr, lsi->lsi_lmd->lmd_opts, + lsi->lsi_svname); + if (rc) + GOTO(out, rc); + obd = class_name2obd(lsi->lsi_osd_obdname); + LASSERT(obd); + } + + rc = obd_connect(NULL, &lsi->lsi_osd_exp, + obd, &obd->obd_uuid, NULL, NULL); + if (rc) { + obd->obd_force = 1; + class_manual_cleanup(obd); + lsi->lsi_dt_dev = NULL; + } + + /* XXX: to keep support old components relying on lsi_srv_mnt + * we get this info from OSD just started */ + LASSERT(obd->obd_lu_dev); + lsi->lsi_dt_dev = lu2dt_dev(obd->obd_lu_dev); + LASSERT(lsi->lsi_dt_dev); + + dt_conf_get(NULL, lsi->lsi_dt_dev, &p); + + lsi->lsi_srv_mnt = p.ddp_mnt; + +out: + RETURN(rc); +} + +/** Fill in the superblock info for a Lustre server. + * Mount the device with the correct options. + * Read the on-disk config file. + * Start the services. + */ +int server_fill_super(struct super_block *sb) +{ + struct lustre_sb_info *lsi = s2lsi(sb); + int rc; + ENTRY; + + rc = lsi_prepare(lsi); + if (rc) + RETURN(rc); + + /* Start low level OSD */ + rc = osd_start(lsi, sb->s_flags); + if (rc) { + CERROR("Unable to start osd on %s: %d\n", + lsi->lsi_lmd->lmd_dev, rc); + lustre_put_lsi(sb); + RETURN(rc); + } + + CDEBUG(D_MOUNT, "Found service %s on device %s\n", + lsi->lsi_svname, lsi->lsi_lmd->lmd_dev); + + if (class_name2obd(lsi->lsi_svname)) { + LCONSOLE_ERROR_MSG(0x161, "The target named %s is already " + "running. Double-mount may have compromised" + " the disk journal.\n", + lsi->lsi_svname); + lustre_put_lsi(sb); + RETURN(-EALREADY); + } + + /* Start MGS before MGC */ + if (IS_MGS(lsi) && !(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)) { + rc = server_start_mgs(sb); + if (rc) + GOTO(out_mnt, rc); + } + + /* Start MGC before servers */ + rc = lustre_start_mgc(sb); + if (rc) + GOTO(out_mnt, rc); + + /* Set up all obd devices for service */ + if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) && + (IS_OST(lsi) || IS_MDT(lsi))) { + rc = server_start_targets(sb, lsi->lsi_srv_mnt); + if (rc < 0) { + CERROR("Unable to start targets: %d\n", rc); + GOTO(out_mnt, rc); + } + /* FIXME overmount client here, or can we just start a + * client log and client_fill_super on this sb? We + * need to make sure server_put_super gets called too + * - ll_put_super calls lustre_common_put_super; check + * there for LSI_SERVER flag, call s_p_s if so. + * + * Probably should start client from new thread so we + * can return. Client will not finish until all + * servers are connected. Note - MGS-only server does + * NOT get a client, since there is no lustre fs + * associated - the MGS is for all lustre fs's */ + } + + rc = server_fill_super_common(sb); + if (rc) + GOTO(out_mnt, rc); + + RETURN(0); +out_mnt: + /* We jump here in case of failure while starting targets or MGS. + * In this case we can't just put @mnt and have to do real cleanup + * with stoping targets, etc. */ + server_put_super(sb); + return rc; +} + +/* + * Calculate timeout value for a target. + */ +void server_calc_timeout(struct lustre_sb_info *lsi, struct obd_device *obd) +{ + struct lustre_mount_data *lmd; + int soft = 0; + int hard = 0; + int factor = 0; + bool has_ir = !!(lsi->lsi_flags & LDD_F_IR_CAPABLE); + int min = OBD_RECOVERY_TIME_MIN; + + LASSERT(IS_SERVER(lsi)); + + lmd = lsi->lsi_lmd; + if (lmd) { + soft = lmd->lmd_recovery_time_soft; + hard = lmd->lmd_recovery_time_hard; + has_ir = has_ir && !(lmd->lmd_flags & LMD_FLG_NOIR); + obd->obd_no_ir = !has_ir; + } + + if (soft == 0) + soft = OBD_RECOVERY_TIME_SOFT; + if (hard == 0) + hard = OBD_RECOVERY_TIME_HARD; + + /* target may have ir_factor configured. */ + factor = OBD_IR_FACTOR_DEFAULT; + if (obd->obd_recovery_ir_factor) + factor = obd->obd_recovery_ir_factor; + + if (has_ir) { + int new_soft = soft; + int new_hard = hard; + + /* adjust timeout value by imperative recovery */ + + new_soft = (soft * factor) / OBD_IR_FACTOR_MAX; + new_hard = (hard * factor) / OBD_IR_FACTOR_MAX; + + /* make sure the timeout is not too short */ + new_soft = max(min, new_soft); + new_hard = max(new_soft, new_hard); + + LCONSOLE_INFO("%s: Imperative Recovery enabled, recovery " + "window shrunk from %d-%d down to %d-%d\n", + obd->obd_name, soft, hard, new_soft, new_hard); + + soft = new_soft; + hard = new_hard; + } + + /* we're done */ + obd->obd_recovery_timeout = max(obd->obd_recovery_timeout, soft); + obd->obd_recovery_time_hard = hard; + obd->obd_recovery_ir_factor = factor; +} +EXPORT_SYMBOL(server_calc_timeout); -- 1.8.3.1