From 476c006be009d4121e401a9e9f49a3362a7a272f Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Mon, 23 Apr 2007 11:55:39 -0400 Subject: [PATCH] [GFS2] use lib/parser for parsing mount options This patch converts the mount option parsing to use the kernels lib/parser stuff like all of the other filesystems. I tested this and it works well. Thank you, Signed-off-by: Josef Bacik Signed-off-by: Steven Whitehouse --- fs/gfs2/mount.c | 239 +++++++++++++++++++++++++++++------------------- 1 file changed, 143 insertions(+), 96 deletions(-) diff --git a/fs/gfs2/mount.c b/fs/gfs2/mount.c index 32caecd20300..4864659555d4 100644 --- a/fs/gfs2/mount.c +++ b/fs/gfs2/mount.c @@ -13,6 +13,7 @@ #include #include #include +#include #include "gfs2.h" #include "incore.h" @@ -20,6 +21,52 @@ #include "sys.h" #include "util.h" +enum { + Opt_lockproto, + Opt_locktable, + Opt_hostdata, + Opt_spectator, + Opt_ignore_local_fs, + Opt_localflocks, + Opt_localcaching, + Opt_debug, + Opt_nodebug, + Opt_upgrade, + Opt_num_glockd, + Opt_acl, + Opt_noacl, + Opt_quota_off, + Opt_quota_account, + Opt_quota_on, + Opt_suiddir, + Opt_nosuiddir, + Opt_data_writeback, + Opt_data_ordered, +}; + +static match_table_t tokens = { + {Opt_lockproto, "lockproto=%s"}, + {Opt_locktable, "locktable=%s"}, + {Opt_hostdata, "hostdata=%s"}, + {Opt_spectator, "spectator"}, + {Opt_ignore_local_fs, "ignore_local_fs"}, + {Opt_localflocks, "localflocks"}, + {Opt_localcaching, "localcaching"}, + {Opt_debug, "debug"}, + {Opt_nodebug, "nodebug"}, + {Opt_upgrade, "upgrade"}, + {Opt_num_glockd, "num_glockd=%d"}, + {Opt_acl, "acl"}, + {Opt_noacl, "noacl"}, + {Opt_quota_off, "quota=off"}, + {Opt_quota_account, "quota=account"}, + {Opt_quota_on, "quota=on"}, + {Opt_suiddir, "suiddir"}, + {Opt_nosuiddir, "nosuiddir"}, + {Opt_data_writeback, "data=writeback"}, + {Opt_data_ordered, "data=ordered"} +}; + /** * gfs2_mount_args - Parse mount options * @sdp: @@ -54,146 +101,150 @@ int gfs2_mount_args(struct gfs2_sbd *sdp, char *data_arg, int remount) process them */ for (options = data; (o = strsep(&options, ",")); ) { + int token, option; + substring_t tmp[MAX_OPT_ARGS]; + if (!*o) continue; - v = strchr(o, '='); - if (v) - *v++ = 0; + token = match_token(o, tokens, tmp); + switch (token) { + case Opt_lockproto: + v = match_strdup(&tmp[0]); + if (!v) { + fs_info(sdp, "no memory for lockproto\n"); + error = -ENOMEM; + goto out_error; + } - if (!strcmp(o, "lockproto")) { - if (!v) - goto need_value; - if (remount && strcmp(v, args->ar_lockproto)) + if (remount && strcmp(v, args->ar_lockproto)) { + kfree(v); goto cant_remount; + } + strncpy(args->ar_lockproto, v, GFS2_LOCKNAME_LEN); args->ar_lockproto[GFS2_LOCKNAME_LEN - 1] = 0; - } + kfree(v); + break; + case Opt_locktable: + v = match_strdup(&tmp[0]); + if (!v) { + fs_info(sdp, "no memory for locktable\n"); + error = -ENOMEM; + goto out_error; + } - else if (!strcmp(o, "locktable")) { - if (!v) - goto need_value; - if (remount && strcmp(v, args->ar_locktable)) + if (remount && strcmp(v, args->ar_locktable)) { + kfree(v); goto cant_remount; + } + strncpy(args->ar_locktable, v, GFS2_LOCKNAME_LEN); - args->ar_locktable[GFS2_LOCKNAME_LEN - 1] = 0; - } + args->ar_locktable[GFS2_LOCKNAME_LEN - 1] = 0; + kfree(v); + break; + case Opt_hostdata: + v = match_strdup(&tmp[0]); + if (!v) { + fs_info(sdp, "no memory for hostdata\n"); + error = -ENOMEM; + goto out_error; + } - else if (!strcmp(o, "hostdata")) { - if (!v) - goto need_value; - if (remount && strcmp(v, args->ar_hostdata)) + if (remount && strcmp(v, args->ar_hostdata)) { + kfree(v); goto cant_remount; + } + strncpy(args->ar_hostdata, v, GFS2_LOCKNAME_LEN); args->ar_hostdata[GFS2_LOCKNAME_LEN - 1] = 0; - } - - else if (!strcmp(o, "spectator")) { + kfree(v); + break; + case Opt_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")) { + break; + case Opt_ignore_local_fs: if (remount && !args->ar_ignore_local_fs) goto cant_remount; args->ar_ignore_local_fs = 1; - } - - else if (!strcmp(o, "localflocks")) { + break; + case Opt_localflocks: if (remount && !args->ar_localflocks) goto cant_remount; args->ar_localflocks = 1; - } - - else if (!strcmp(o, "localcaching")) { + break; + case Opt_localcaching: if (remount && !args->ar_localcaching) goto cant_remount; args->ar_localcaching = 1; - } - - else if (!strcmp(o, "debug")) + break; + case Opt_debug: args->ar_debug = 1; - - else if (!strcmp(o, "nodebug")) + break; + case Opt_nodebug: args->ar_debug = 0; - - else if (!strcmp(o, "upgrade")) { + break; + case Opt_upgrade: if (remount && !args->ar_upgrade) goto cant_remount; args->ar_upgrade = 1; - } + break; + case Opt_num_glockd: + if ((error = match_int(&tmp[0], &option))) { + fs_info(sdp, "problem getting num_glockd\n"); + goto out_error; + } - 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) + if (remount && option != args->ar_num_glockd) goto cant_remount; - if (!x || x > GFS2_GLOCKD_MAX) { + if (!option || option > GFS2_GLOCKD_MAX) { fs_info(sdp, "0 < num_glockd <= %u (not %u)\n", - GFS2_GLOCKD_MAX, x); + GFS2_GLOCKD_MAX, option); error = -EINVAL; - break; + goto out_error; } - args->ar_num_glockd = x; - } - - else if (!strcmp(o, "acl")) { + args->ar_num_glockd = option; + break; + case Opt_acl: args->ar_posix_acl = 1; sdp->sd_vfs->s_flags |= MS_POSIXACL; - } - - else if (!strcmp(o, "noacl")) { + break; + case Opt_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")) + break; + case Opt_quota_off: + args->ar_quota = GFS2_QUOTA_OFF; + break; + case Opt_quota_account: + args->ar_quota = GFS2_QUOTA_ACCOUNT; + break; + case Opt_quota_on: + args->ar_quota = GFS2_QUOTA_ON; + break; + case Opt_suiddir: args->ar_suiddir = 1; - - else if (!strcmp(o, "nosuiddir")) + break; + case Opt_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 { + break; + case Opt_data_writeback: + args->ar_data = GFS2_DATA_WRITEBACK; + break; + case Opt_data_ordered: + args->ar_data = GFS2_DATA_ORDERED; + break; + default: fs_info(sdp, "unknown option: %s\n", o); error = -EINVAL; - break; + goto out_error; } } +out_error: if (error) fs_info(sdp, "invalid mount option(s)\n"); @@ -202,10 +253,6 @@ int gfs2_mount_args(struct gfs2_sbd *sdp, char *data_arg, int remount) 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; -- 2.30.2