/* * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. * * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions * of the GNU General Public License version 2. */ #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/completion.h> #include <linux/buffer_head.h> #include <linux/gfs2_ondisk.h> #include <linux/lm_interface.h> #include "gfs2.h" #include "incore.h" #include "mount.h" #include "sys.h" #include "util.h" /** * gfs2_mount_args - Parse mount options * @sdp: * @data: * * Return: errno */ int gfs2_mount_args(struct gfs2_sbd *sdp, char *data_arg, int remount) { struct gfs2_args *args = &sdp->sd_args; char *data = data_arg; char *options, *o, *v; int error = 0; if (!remount) { /* If someone preloaded options, use those instead */ spin_lock(&gfs2_sys_margs_lock); if (gfs2_sys_margs) { data = gfs2_sys_margs; gfs2_sys_margs = NULL; } spin_unlock(&gfs2_sys_margs_lock); /* Set some defaults */ args->ar_num_glockd = GFS2_GLOCKD_DEFAULT; args->ar_quota = GFS2_QUOTA_DEFAULT; args->ar_data = GFS2_DATA_DEFAULT; } /* Split the options into tokens with the "," character and process them */ for (options = data; (o = strsep(&options, ",")); ) { if (!*o) continue; v = strchr(o, '='); if (v) *v++ = 0; if (!strcmp(o, "lockproto")) { if (!v) goto need_value; if (remount && strcmp(v, args->ar_lockproto)) goto cant_remount; strncpy(args->ar_lockproto, v, GFS2_LOCKNAME_LEN); args->ar_lockproto[GFS2_LOCKNAME_LEN - 1] = 0; } else if (!strcmp(o, "locktable")) { if (!v) goto need_value; if (remount && strcmp(v, args->ar_locktable)) goto cant_remount; strncpy(args->ar_locktable, v, GFS2_LOCKNAME_LEN); args->ar_locktable[GFS2_LOCKNAME_LEN - 1] = 0; } else if (!strcmp(o, "hostdata")) { if (!v) goto need_value; if (remount && strcmp(v, args->ar_hostdata)) goto cant_remount; strncpy(args->ar_hostdata, v, GFS2_LOCKNAME_LEN); args->ar_hostdata[GFS2_LOCKNAME_LEN - 1] = 0; } else if (!strcmp(o, "spectator")) { if (remount && !args->ar_spectator) goto cant_remount; args->ar_spectator = 1; sdp->sd_vfs->s_flags |= MS_RDONLY; } else if (!strcmp(o, "ignore_local_fs")) { if (remount && !args->ar_ignore_local_fs) goto cant_remount; args->ar_ignore_local_fs = 1; } else if (!strcmp(o, "localflocks")) { if (remount && !args->ar_localflocks) goto cant_remount; args->ar_localflocks = 1; } else if (!strcmp(o, "localcaching")) { if (remount && !args->ar_localcaching) goto cant_remount; args->ar_localcaching = 1; } else if (!strcmp(o, "debug")) args->ar_debug = 1; else if (!strcmp(o, "nodebug")) args->ar_debug = 0; else if (!strcmp(o, "upgrade")) { if (remount && !args->ar_upgrade) goto cant_remount; args->ar_upgrade = 1; } else if (!strcmp(o, "num_glockd")) { unsigned int x; if (!v) goto need_value; sscanf(v, "%u", &x); if (remount && x != args->ar_num_glockd) goto cant_remount; if (!x || x > GFS2_GLOCKD_MAX) { fs_info(sdp, "0 < num_glockd <= %u (not %u)\n", GFS2_GLOCKD_MAX, x); error = -EINVAL; break; } args->ar_num_glockd = x; } else if (!strcmp(o, "acl")) { args->ar_posix_acl = 1; sdp->sd_vfs->s_flags |= MS_POSIXACL; } else if (!strcmp(o, "noacl")) { args->ar_posix_acl = 0; sdp->sd_vfs->s_flags &= ~MS_POSIXACL; } else if (!strcmp(o, "quota")) { if (!v) goto need_value; if (!strcmp(v, "off")) args->ar_quota = GFS2_QUOTA_OFF; else if (!strcmp(v, "account")) args->ar_quota = GFS2_QUOTA_ACCOUNT; else if (!strcmp(v, "on")) args->ar_quota = GFS2_QUOTA_ON; else { fs_info(sdp, "invalid value for quota\n"); error = -EINVAL; break; } } else if (!strcmp(o, "suiddir")) args->ar_suiddir = 1; else if (!strcmp(o, "nosuiddir")) args->ar_suiddir = 0; else if (!strcmp(o, "data")) { if (!v) goto need_value; if (!strcmp(v, "writeback")) args->ar_data = GFS2_DATA_WRITEBACK; else if (!strcmp(v, "ordered")) args->ar_data = GFS2_DATA_ORDERED; else { fs_info(sdp, "invalid value for data\n"); error = -EINVAL; break; } } else { fs_info(sdp, "unknown option: %s\n", o); error = -EINVAL; break; } } if (error) fs_info(sdp, "invalid mount option(s)\n"); if (data != data_arg) kfree(data); return error; need_value: fs_info(sdp, "need value for option %s\n", o); return -EINVAL; cant_remount: fs_info(sdp, "can't remount with option %s\n", o); return -EINVAL; }