diff options
Diffstat (limited to 'fs/gfs2/ops_super.c')
| -rw-r--r-- | fs/gfs2/ops_super.c | 44 |
1 files changed, 33 insertions, 11 deletions
diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c index 320323d03479..458019569dcb 100644 --- a/fs/gfs2/ops_super.c +++ b/fs/gfs2/ops_super.c @@ -19,7 +19,6 @@ #include <linux/delay.h> #include <linux/gfs2_ondisk.h> #include <linux/crc32.h> -#include <linux/lm_interface.h> #include <linux/time.h> #include "gfs2.h" @@ -27,7 +26,6 @@ #include "glock.h" #include "inode.h" #include "log.h" -#include "mount.h" #include "quota.h" #include "recovery.h" #include "rgrp.h" @@ -40,6 +38,8 @@ #include "bmap.h" #include "meta_io.h" +#define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x) + /** * gfs2_write_inode - Make sure the inode is stable on the disk * @inode: The inode @@ -435,25 +435,45 @@ static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) { struct gfs2_sbd *sdp = sb->s_fs_info; + struct gfs2_args args = sdp->sd_args; /* Default to current settings */ int error; - error = gfs2_mount_args(sdp, data, 1); + error = gfs2_mount_args(sdp, &args, data); if (error) return error; + /* Not allowed to change locking details */ + if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) || + strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) || + strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata)) + return -EINVAL; + + /* Some flags must not be changed */ + if (args_neq(&args, &sdp->sd_args, spectator) || + args_neq(&args, &sdp->sd_args, ignore_local_fs) || + args_neq(&args, &sdp->sd_args, localflocks) || + args_neq(&args, &sdp->sd_args, localcaching) || + args_neq(&args, &sdp->sd_args, meta)) + return -EINVAL; + if (sdp->sd_args.ar_spectator) *flags |= MS_RDONLY; - else { - if (*flags & MS_RDONLY) { - if (!(sb->s_flags & MS_RDONLY)) - error = gfs2_make_fs_ro(sdp); - } else if (!(*flags & MS_RDONLY) && - (sb->s_flags & MS_RDONLY)) { + + if ((sb->s_flags ^ *flags) & MS_RDONLY) { + if (*flags & MS_RDONLY) + error = gfs2_make_fs_ro(sdp); + else error = gfs2_make_fs_rw(sdp); - } + if (error) + return error; } - return error; + sdp->sd_args = args; + if (sdp->sd_args.ar_posix_acl) + sb->s_flags |= MS_POSIXACL; + else + sb->s_flags &= ~MS_POSIXACL; + return 0; } /** @@ -588,6 +608,8 @@ static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt) } seq_printf(s, ",data=%s", state); } + if (args->ar_discard) + seq_printf(s, ",discard"); return 0; } |