Switch to using fs_context ops for mount/remount.
Signed-off-by: Andrew Price <anprice@xxxxxxxxxx>
---
fs/gfs2/incore.h | 11 +-
fs/gfs2/ops_fstype.c | 405 ++++++++++++++++++++++++++++++++++++++-----
fs/gfs2/super.c | 335 +----------------------------------
fs/gfs2/super.h | 3 +-
4 files changed, 370 insertions(+), 384 deletions(-)
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index cdf07b408f54..ee474201f3b5 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -587,10 +587,13 @@ struct gfs2_args {
unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */
unsigned int ar_loccookie:1; /* use location based readdir
cookies */
- int ar_commit; /* Commit interval */
- int ar_statfs_quantum; /* The fast statfs interval */
- int ar_quota_quantum; /* The quota interval */
- int ar_statfs_percent; /* The % change to force sync */
+ s32 ar_commit; /* Commit interval */
+ s32 ar_statfs_quantum; /* The fast statfs interval */
+ s32 ar_quota_quantum; /* The quota interval */
+ s32 ar_statfs_percent; /* The % change to force sync */
+
+ /* This is just for propagating the bdev through sget_fc() */
+ struct block_device *ar_bdev;
};
struct gfs2_tune {
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index b041cb8ae383..ad2c98a37bd4 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -24,6 +24,7 @@
#include <linux/lockdep.h>
#include <linux/module.h>
#include <linux/backing-dev.h>
+#include <linux/fs_parser.h>
#include "gfs2.h"
#include "incore.h"
@@ -1200,50 +1201,49 @@ static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent
return error;
}
-static int set_gfs2_super(struct super_block *s, void *data)
+static int set_gfs2_super(struct super_block *s, struct fs_context *fc)
{
- s->s_bdev = data;
+ struct gfs2_args *args = fc->fs_private;
+
+ s->s_bdev = args->ar_bdev;
s->s_dev = s->s_bdev->bd_dev;
s->s_bdi = bdi_get(s->s_bdev->bd_bdi);
return 0;
}
-static int test_gfs2_super(struct super_block *s, void *ptr)
+static int test_gfs2_super(struct super_block *s, struct fs_context *fc)
{
- struct block_device *bdev = ptr;
- return (bdev == s->s_bdev);
+ struct gfs2_args *args = fc->fs_private;
+
+ return (args->ar_bdev == s->s_bdev);
}
/**
- * gfs2_mount - Get the GFS2 superblock
- * @fs_type: The GFS2 filesystem type
- * @flags: Mount flags
- * @dev_name: The name of the device
- * @data: The mount arguments
+ * gfs2_get_tree - Get the GFS2 superblock and root directory
+ * @fc: The filesystem context
*
* Q. Why not use get_sb_bdev() ?
* A. We need to select one of two root directories to mount, independent
* of whether this is the initial, or subsequent, mount of this sb
*
- * Returns: 0 or -ve on error
+ * Returns: 0 or -errno on error
*/
-static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data)
+static int gfs2_get_tree(struct fs_context *fc)
{
+ struct gfs2_args *args = fc->fs_private;
+ fmode_t mode = FMODE_READ | FMODE_EXCL;
struct block_device *bdev;
struct super_block *s;
- fmode_t mode = FMODE_READ | FMODE_EXCL;
- int error;
- struct gfs2_args args;
struct gfs2_sbd *sdp;
+ int error;
- if (!(flags & SB_RDONLY))
+ if (!(fc->sb_flags & SB_RDONLY))
mode |= FMODE_WRITE;
- bdev = blkdev_get_by_path(dev_name, mode, fs_type);
+ bdev = blkdev_get_by_path(fc->source, mode, fc->fs_type);
if (IS_ERR(bdev))
- return ERR_CAST(bdev);
+ return PTR_ERR(bdev);
/*
* once the super is inserted into the list by sget, s_umount
@@ -1256,7 +1256,8 @@ static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags,
error = -EBUSY;
goto error_bdev;
}
- s = sget(fs_type, test_gfs2_super, set_gfs2_super, flags, bdev);
+ args->ar_bdev = bdev;
+ s = sget_fc(fc, test_gfs2_super, set_gfs2_super);
mutex_unlock(&bdev->bd_fsfreeze_mutex);
error = PTR_ERR(s);
if (IS_ERR(s))
@@ -1278,28 +1279,14 @@ static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags,
s->s_mode = mode;
}
- memset(&args, 0, sizeof(args));
- args.ar_quota = GFS2_QUOTA_DEFAULT;
- args.ar_data = GFS2_DATA_DEFAULT;
- args.ar_commit = 30;
- args.ar_statfs_quantum = 30;
- args.ar_quota_quantum = 60;
- args.ar_errors = GFS2_ERRORS_DEFAULT;
-
- error = gfs2_mount_args(&args, data);
- if (error) {
- pr_warn("can't parse mount arguments\n");
- goto error_super;
- }
-
if (s->s_root) {
error = -EBUSY;
- if ((flags ^ s->s_flags) & SB_RDONLY)
+ if ((fc->sb_flags ^ s->s_flags) & SB_RDONLY)
goto error_super;
} else {
snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev);
sb_set_blocksize(s, block_size(bdev));
- error = fill_super(s, &args, flags & SB_SILENT ? 1 : 0);
+ error = fill_super(s, args, fc->sb_flags & SB_SILENT ? 1 : 0);
if (error)
goto error_super;
s->s_flags |= SB_ACTIVE;
@@ -1307,17 +1294,339 @@ static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags,
}
sdp = s->s_fs_info;
- if (args.ar_meta)
- return dget(sdp->sd_master_dir);
+ if (args->ar_meta)
+ fc->root = dget(sdp->sd_master_dir);
else
- return dget(sdp->sd_root_dir);
-
+ fc->root = dget(sdp->sd_root_dir);
+ return 0;
error_super:
deactivate_locked_super(s);
- return ERR_PTR(error);
+ return error;
error_bdev:
blkdev_put(bdev, mode);
- return ERR_PTR(error);
+ return error;
+}
+
+static void gfs2_fc_free(struct fs_context *fc)
+{
+ struct gfs2_args *args = fc->fs_private;
+
+ kfree(args);
+}
+
+enum gfs2_param {
+ Opt_lockproto,
+ Opt_locktable,
+ Opt_hostdata,
+ Opt_spectator,
+ Opt_ignore_local_fs,
+ Opt_localflocks,
+ Opt_localcaching,
+ Opt_debug,
+ Opt_upgrade,
+ Opt_acl,
+ Opt_quota,
+ Opt_suiddir,
+ Opt_data,
+ Opt_meta,
+ Opt_discard,
+ Opt_commit,
+ Opt_errors,
+ Opt_statfs_quantum,
+ Opt_statfs_percent,
+ Opt_quota_quantum,
+ Opt_barrier,
+ Opt_rgrplvb,
+ Opt_loccookie,
+};
+
+enum opt_quota {
+ Opt_quota_unset = 0,
+ Opt_quota_off,
+ Opt_quota_account,
+ Opt_quota_on,
+};
+
+static const unsigned int opt_quota_values[] = {
+ [Opt_quota_off] = GFS2_QUOTA_OFF,
+ [Opt_quota_account] = GFS2_QUOTA_ACCOUNT,
+ [Opt_quota_on] = GFS2_QUOTA_ON,
+};
+
+enum opt_data {
+ Opt_data_writeback = GFS2_DATA_WRITEBACK,
+ Opt_data_ordered = GFS2_DATA_ORDERED,
+};
+
+enum opt_errors {
+ Opt_errors_withdraw = GFS2_ERRORS_WITHDRAW,
+ Opt_errors_panic = GFS2_ERRORS_PANIC,
+};
+
+static const struct fs_parameter_spec gfs2_param_specs[] = {
+ fsparam_string ("lockproto", Opt_lockproto),
+ fsparam_string ("locktable", Opt_locktable),
+ fsparam_string ("hostdata", Opt_hostdata),
+ fsparam_flag ("spectator", Opt_spectator),
+ fsparam_flag ("norecovery", Opt_spectator),
+ fsparam_flag ("ignore_local_fs", Opt_ignore_local_fs),
+ fsparam_flag ("localflocks", Opt_localflocks),
+ fsparam_flag ("localcaching", Opt_localcaching),
+ fsparam_flag_no("debug", Opt_debug),
+ fsparam_flag ("upgrade", Opt_upgrade),
+ fsparam_flag_no("acl", Opt_acl),
+ fsparam_flag_no("suiddir", Opt_suiddir),
+ fsparam_enum ("data", Opt_data),
+ fsparam_flag ("meta", Opt_meta),
+ fsparam_flag_no("discard", Opt_discard),
+ fsparam_s32 ("commit", Opt_commit),
+ fsparam_enum ("errors", Opt_errors),
+ fsparam_s32 ("statfs_quantum", Opt_statfs_quantum),
+ fsparam_s32 ("statfs_percent", Opt_statfs_percent),
+ fsparam_s32 ("quota_quantum", Opt_quota_quantum),
+ fsparam_flag_no("barrier", Opt_barrier),
+ fsparam_flag_no("rgrplvb", Opt_rgrplvb),
+ fsparam_flag_no("loccookie", Opt_loccookie),
+ /* quota can be a flag or an enum so it gets special treatment */
+ __fsparam(fs_param_is_enum, "quota", Opt_quota, fs_param_neg_with_no|fs_param_v_optional),
+ {}
+};
+
+static const struct fs_parameter_enum gfs2_param_enums[] = {
+ { Opt_quota, "off", Opt_quota_off },
+ { Opt_quota, "account", Opt_quota_account },
+ { Opt_quota, "on", Opt_quota_on },
+ { Opt_data, "writeback", Opt_data_writeback },
+ { Opt_data, "ordered", Opt_data_ordered },
+ { Opt_errors, "withdraw", Opt_errors_withdraw },
+ { Opt_errors, "panic", Opt_errors_panic },
+ {}
+};
+
+const struct fs_parameter_description gfs2_fs_parameters = {
+ .name = "gfs2",
+ .specs = gfs2_param_specs,
+ .enums = gfs2_param_enums,
+};
+
+/* Parse a single mount parameter */
+static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
+{
+ struct gfs2_args *args = fc->fs_private;
+ struct fs_parse_result result;
+ int o;
+
+ o = fs_parse(fc, &gfs2_fs_parameters, param, &result);
+ if (o < 0)
+ return o;
+
+ switch (o) {
+ case Opt_lockproto:
+ strlcpy(args->ar_lockproto, param->string, GFS2_LOCKNAME_LEN);
+ break;
+ case Opt_locktable:
+ strlcpy(args->ar_locktable, param->string, GFS2_LOCKNAME_LEN);
+ break;
+ case Opt_hostdata:
+ strlcpy(args->ar_hostdata, param->string, GFS2_LOCKNAME_LEN);
+ break;
+ case Opt_spectator:
+ args->ar_spectator = 1;
+ break;
+ case Opt_ignore_local_fs:
+ /* Retained for backwards compat only */
+ break;
+ case Opt_localflocks:
+ args->ar_localflocks = 1;
+ break;
+ case Opt_localcaching:
+ /* Retained for backwards compat only */
+ break;
+ case Opt_debug:
+ if (result.boolean && args->ar_errors == GFS2_ERRORS_PANIC) {
+ pr_warn("-o debug and -o errors=panic are mutually exclusive\n");
+ return -EINVAL;
+ }
+ args->ar_debug = result.boolean;
+ break;
+ case Opt_upgrade:
+ /* Retained for backwards compat only */
+ break;
+ case Opt_acl:
+ args->ar_posix_acl = result.boolean;
+ break;
+ case Opt_quota:
+ /* The quota option can be a flag or an enum. A non-zero int_32
+ result means that we have an enum index. Otherwise we have
+ to rely on the 'negated' flag to tell us whether 'quota' or
+ 'noquota' was specified. */
+ if (result.int_32 > 0)
+ args->ar_quota = opt_quota_values[result.int_32];
+ else if (result.negated)
+ args->ar_quota = GFS2_QUOTA_OFF;
+ else
+ args->ar_quota = GFS2_QUOTA_ON;
+ break;
+ case Opt_suiddir:
+ args->ar_suiddir = result.boolean;
+ break;
+ case Opt_data:
+ /* The uint_32 result maps directly to GFS2_DATA_* */
+ args->ar_data = result.uint_32;
+ break;
+ case Opt_meta:
+ args->ar_meta = 1;
+ break;
+ case Opt_discard:
+ args->ar_discard = result.boolean;
+ break;
+ case Opt_commit:
+ if (result.int_32 <= 0) {
+ pr_warn("commit mount option requires a positive numeric argument\n");
+ return -EINVAL;
+ }
+ args->ar_commit = result.int_32;
+ break;
+ case Opt_statfs_quantum:
+ if (result.int_32 < 0) {
+ pr_warn("statfs_quantum mount option requires a non-negative numeric argument\n");
+ return -EINVAL;
+ }
+ args->ar_statfs_quantum = result.int_32;
+ break;
+ case Opt_quota_quantum:
+ if (result.int_32 <= 0) {
+ pr_warn("quota_quantum mount option requires a positive numeric argument\n");
+ return -EINVAL;
+ }
+ args->ar_quota_quantum = result.int_32;
+ break;
+ case Opt_statfs_percent:
+ if (result.int_32 < 0 || result.int_32 > 100) {
+ pr_warn("statfs_percent mount option requires a numeric argument between 0 and 100\n");
+ return -EINVAL;
+ }
+ args->ar_statfs_percent = result.int_32;
+ break;
+ case Opt_errors:
+ if (args->ar_debug && result.uint_32 == GFS2_ERRORS_PANIC) {
+ pr_warn("-o debug and -o errors=panic are mutually exclusive\n");
+ return -EINVAL;
+ }
+ args->ar_errors = result.uint_32;
+ break;
+ case Opt_barrier:
+ args->ar_nobarrier = result.boolean;
+ break;
+ case Opt_rgrplvb:
+ args->ar_rgrplvb = result.boolean;
+ break;
+ case Opt_loccookie:
+ args->ar_loccookie = result.boolean;
+ break;
+ default:
+ pr_warn("invalid mount option: %s\n", param->key);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int gfs2_reconfigure(struct fs_context *fc)
+{
+ struct super_block *sb = fc->root->d_sb;
+ struct gfs2_sbd *sdp = sb->s_fs_info;
+ struct gfs2_args *oldargs = &sdp->sd_args;
+ struct gfs2_args *newargs = fc->fs_private;
+ struct gfs2_tune *gt = &sdp->sd_tune;
+ int error;
+
+ sync_filesystem(sb);
+
+ spin_lock(>->gt_spin);
+ oldargs->ar_commit = gt->gt_logd_secs;
+ oldargs->ar_quota_quantum = gt->gt_quota_quantum;
+ if (gt->gt_statfs_slow)
+ oldargs->ar_statfs_quantum = 0;
+ else
+ oldargs->ar_statfs_quantum = gt->gt_statfs_quantum;
+ spin_unlock(>->gt_spin);
+
+ /* Not allowed to change locking details */
+ if (strcmp(newargs->ar_lockproto, oldargs->ar_lockproto) ||
+ strcmp(newargs->ar_locktable, oldargs->ar_locktable) ||
+ strcmp(newargs->ar_hostdata, oldargs->ar_hostdata))
+ return -EINVAL;
+
+ /* Some flags must not be changed */
+ if (newargs->ar_spectator != oldargs->ar_spectator ||
+ newargs->ar_localflocks != oldargs->ar_localflocks ||
+ newargs->ar_meta != oldargs->ar_meta)
+ return -EINVAL;
+
+ if (oldargs->ar_spectator)
+ fc->sb_flags |= SB_RDONLY;
+
+ if ((sb->s_flags ^ fc->sb_flags) & SB_RDONLY) {
+ if (fc->sb_flags & SB_RDONLY)
+ error = gfs2_make_fs_ro(sdp);
+ else
+ error = gfs2_make_fs_rw(sdp);
+ if (error)
+ return error;
+ }
+ sdp->sd_args = *newargs;
+
+ if (sdp->sd_args.ar_posix_acl)
+ sb->s_flags |= SB_POSIXACL;
+ else
+ sb->s_flags &= ~SB_POSIXACL;
+ if (sdp->sd_args.ar_nobarrier)
+ set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
+ else
+ clear_bit(SDF_NOBARRIERS, &sdp->sd_flags);
+ spin_lock(>->gt_spin);
+ gt->gt_logd_secs = newargs->ar_commit;
+ gt->gt_quota_quantum = newargs->ar_quota_quantum;
+ if (newargs->ar_statfs_quantum) {
+ gt->gt_statfs_slow = 0;
+ gt->gt_statfs_quantum = newargs->ar_statfs_quantum;
+ }
+ else {
+ gt->gt_statfs_slow = 1;
+ gt->gt_statfs_quantum = 30;
+ }
+ spin_unlock(>->gt_spin);
+
+ gfs2_online_uevent(sdp);
+ return 0;
+}
+
+static const struct fs_context_operations gfs2_context_ops = {
+ .free = gfs2_fc_free,
+ .parse_param = gfs2_parse_param,
+ .get_tree = gfs2_get_tree,
+ .reconfigure = gfs2_reconfigure,
+};
+
+/* Set up the filesystem mount context */
+static int gfs2_init_fs_context(struct fs_context *fc)
+{
+ struct gfs2_args *args;
+
+ args = kzalloc(sizeof(*args), GFP_KERNEL);
+ if (args == NULL)
+ return -ENOMEM;
+
+ args->ar_quota = GFS2_QUOTA_DEFAULT;
+ args->ar_data = GFS2_DATA_DEFAULT;
+ args->ar_commit = 30;
+ args->ar_statfs_quantum = 30;
+ args->ar_quota_quantum = 60;
+ args->ar_errors = GFS2_ERRORS_DEFAULT;
+
+ fc->fs_private = args;
+ fc->ops = &gfs2_context_ops;
+ return 0;
}
static int set_meta_super(struct super_block *s, void *ptr)
@@ -1325,6 +1634,13 @@ static int set_meta_super(struct super_block *s, void *ptr)
return -EINVAL;
}
+static int test_meta_super(struct super_block *s, void *ptr)
+{
+ struct block_device *bdev = ptr;
+ return (bdev == s->s_bdev);
+}
+
+
static struct dentry *gfs2_mount_meta(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
{
@@ -1342,7 +1658,7 @@ static struct dentry *gfs2_mount_meta(struct file_system_type *fs_type,
dev_name, error);
return ERR_PTR(error);
}
- s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super, flags,
+ s = sget(&gfs2_fs_type, test_meta_super, set_meta_super, flags,
path.dentry->d_sb->s_bdev);
path_put(&path);
if (IS_ERR(s)) {
@@ -1379,7 +1695,8 @@ static void gfs2_kill_sb(struct super_block *sb)
struct file_system_type gfs2_fs_type = {
.name = "gfs2",
.fs_flags = FS_REQUIRES_DEV,
- .mount = gfs2_mount,
+ .init_fs_context = gfs2_init_fs_context,
+ .parameters = &gfs2_fs_parameters,
.kill_sb = gfs2_kill_sb,
.owner = THIS_MODULE,
};
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index ca71163ff7cf..18917f8ae7ea 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -46,258 +46,6 @@
#include "sys.h"
#include "xattr.h"
-#define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x)
-
-enum {
- Opt_lockproto,
- Opt_locktable,
- Opt_hostdata,
- Opt_spectator,
- Opt_ignore_local_fs,
- Opt_localflocks,
- Opt_localcaching,
- Opt_debug,
- Opt_nodebug,
- Opt_upgrade,
- Opt_acl,
- Opt_noacl,
- Opt_quota_off,
- Opt_quota_account,
- Opt_quota_on,
- Opt_quota,
- Opt_noquota,
- Opt_suiddir,
- Opt_nosuiddir,
- Opt_data_writeback,
- Opt_data_ordered,
- Opt_meta,
- Opt_discard,
- Opt_nodiscard,
- Opt_commit,
- Opt_err_withdraw,
- Opt_err_panic,
- Opt_statfs_quantum,
- Opt_statfs_percent,
- Opt_quota_quantum,
- Opt_barrier,
- Opt_nobarrier,
- Opt_rgrplvb,
- Opt_norgrplvb,
- Opt_loccookie,
- Opt_noloccookie,
- Opt_error,
-};
-
-static const match_table_t tokens = {
- {Opt_lockproto, "lockproto=%s"},
- {Opt_locktable, "locktable=%s"},
- {Opt_hostdata, "hostdata=%s"},
- {Opt_spectator, "spectator"},
- {Opt_spectator, "norecovery"},
- {Opt_ignore_local_fs, "ignore_local_fs"},
- {Opt_localflocks, "localflocks"},
- {Opt_localcaching, "localcaching"},
- {Opt_debug, "debug"},
- {Opt_nodebug, "nodebug"},
- {Opt_upgrade, "upgrade"},
- {Opt_acl, "acl"},
- {Opt_noacl, "noacl"},
- {Opt_quota_off, "quota=off"},
- {Opt_quota_account, "quota=account"},
- {Opt_quota_on, "quota=on"},
- {Opt_quota, "quota"},
- {Opt_noquota, "noquota"},
- {Opt_suiddir, "suiddir"},
- {Opt_nosuiddir, "nosuiddir"},
- {Opt_data_writeback, "data=writeback"},
- {Opt_data_ordered, "data=ordered"},
- {Opt_meta, "meta"},
- {Opt_discard, "discard"},
- {Opt_nodiscard, "nodiscard"},
- {Opt_commit, "commit=%d"},
- {Opt_err_withdraw, "errors=withdraw"},
- {Opt_err_panic, "errors=panic"},
- {Opt_statfs_quantum, "statfs_quantum=%d"},
- {Opt_statfs_percent, "statfs_percent=%d"},
- {Opt_quota_quantum, "quota_quantum=%d"},
- {Opt_barrier, "barrier"},
- {Opt_nobarrier, "nobarrier"},
- {Opt_rgrplvb, "rgrplvb"},
- {Opt_norgrplvb, "norgrplvb"},
- {Opt_loccookie, "loccookie"},
- {Opt_noloccookie, "noloccookie"},
- {Opt_error, NULL}
-};
-
-/**
- * gfs2_mount_args - Parse mount options
- * @args: The structure into which the parsed options will be written
- * @options: The options to parse
- *
- * Return: errno
- */
-
-int gfs2_mount_args(struct gfs2_args *args, char *options)
-{
- char *o;
- int token;
- substring_t tmp[MAX_OPT_ARGS];
- int rv;
-
- /* Split the options into tokens with the "," character and
- process them */
-
- while (1) {
- o = strsep(&options, ",");
- if (o == NULL)
- break;
- if (*o == '\0')
- continue;
-
- token = match_token(o, tokens, tmp);
- switch (token) {
- case Opt_lockproto:
- match_strlcpy(args->ar_lockproto, &tmp[0],
- GFS2_LOCKNAME_LEN);
- break;
- case Opt_locktable:
- match_strlcpy(args->ar_locktable, &tmp[0],
- GFS2_LOCKNAME_LEN);
- break;
- case Opt_hostdata:
- match_strlcpy(args->ar_hostdata, &tmp[0],
- GFS2_LOCKNAME_LEN);
- break;
- case Opt_spectator:
- args->ar_spectator = 1;
- break;
- case Opt_ignore_local_fs:
- /* Retained for backwards compat only */
- break;
- case Opt_localflocks:
- args->ar_localflocks = 1;
- break;
- case Opt_localcaching:
- /* Retained for backwards compat only */
- break;
- case Opt_debug:
- if (args->ar_errors == GFS2_ERRORS_PANIC) {
- pr_warn("-o debug and -o errors=panic are mutually exclusive\n");
- return -EINVAL;
- }
- args->ar_debug = 1;
- break;
- case Opt_nodebug:
- args->ar_debug = 0;
- break;
- case Opt_upgrade:
- /* Retained for backwards compat only */
- break;
- case Opt_acl:
- args->ar_posix_acl = 1;
- break;
- case Opt_noacl:
- args->ar_posix_acl = 0;
- break;
- case Opt_quota_off:
- case Opt_noquota:
- args->ar_quota = GFS2_QUOTA_OFF;
- break;
- case Opt_quota_account:
- args->ar_quota = GFS2_QUOTA_ACCOUNT;
- break;
- case Opt_quota_on:
- case Opt_quota:
- args->ar_quota = GFS2_QUOTA_ON;
- break;
- case Opt_suiddir:
- args->ar_suiddir = 1;
- break;
- case Opt_nosuiddir:
- args->ar_suiddir = 0;
- break;
- case Opt_data_writeback:
- args->ar_data = GFS2_DATA_WRITEBACK;
- break;
- case Opt_data_ordered:
- args->ar_data = GFS2_DATA_ORDERED;
- break;
- case Opt_meta:
- args->ar_meta = 1;
- break;
- case Opt_discard:
- args->ar_discard = 1;
- break;
- case Opt_nodiscard:
- args->ar_discard = 0;
- break;
- case Opt_commit:
- rv = match_int(&tmp[0], &args->ar_commit);
- if (rv || args->ar_commit <= 0) {
- pr_warn("commit mount option requires a positive numeric argument\n");
- return rv ? rv : -EINVAL;
- }
- break;
- case Opt_statfs_quantum:
- rv = match_int(&tmp[0], &args->ar_statfs_quantum);
- if (rv || args->ar_statfs_quantum < 0) {
- pr_warn("statfs_quantum mount option requires a non-negative numeric argument\n");
- return rv ? rv : -EINVAL;
- }
- break;
- case Opt_quota_quantum:
- rv = match_int(&tmp[0], &args->ar_quota_quantum);
- if (rv || args->ar_quota_quantum <= 0) {
- pr_warn("quota_quantum mount option requires a positive numeric argument\n");
- return rv ? rv : -EINVAL;
- }
- break;
- case Opt_statfs_percent:
- rv = match_int(&tmp[0], &args->ar_statfs_percent);
- if (rv || args->ar_statfs_percent < 0 ||
- args->ar_statfs_percent > 100) {
- pr_warn("statfs_percent mount option requires a numeric argument between 0 and 100\n");
- return rv ? rv : -EINVAL;
- }
- break;
- case Opt_err_withdraw:
- args->ar_errors = GFS2_ERRORS_WITHDRAW;
- break;
- case Opt_err_panic:
- if (args->ar_debug) {
- pr_warn("-o debug and -o errors=panic are mutually exclusive\n");
- return -EINVAL;
- }
- args->ar_errors = GFS2_ERRORS_PANIC;
- break;
- case Opt_barrier:
- args->ar_nobarrier = 0;
- break;
- case Opt_nobarrier:
- args->ar_nobarrier = 1;
- break;
- case Opt_rgrplvb:
- args->ar_rgrplvb = 1;
- break;
- case Opt_norgrplvb:
- args->ar_rgrplvb = 0;
- break;
- case Opt_loccookie:
- args->ar_loccookie = 1;
- break;
- case Opt_noloccookie:
- args->ar_loccookie = 0;
- break;
- case Opt_error:
- default:
- pr_warn("invalid mount option: %s\n", o);
- return -EINVAL;
- }
- }
-
- return 0;
-}
-
/**
* gfs2_jindex_free - Clear all the journal index information
* @sdp: The GFS2 superblock
@@ -844,7 +592,7 @@ static void gfs2_dirty_inode(struct inode *inode, int flags)
* Returns: errno
*/
-static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
+int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
{
struct gfs2_holder freeze_gh;
int error;
@@ -1223,86 +971,6 @@ static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
return 0;
}
-/**
- * gfs2_remount_fs - called when the FS is remounted
- * @sb: the filesystem
- * @flags: the remount flags
- * @data: extra data passed in (not used right now)
- *
- * Returns: errno
- */
-
-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 */
- struct gfs2_tune *gt = &sdp->sd_tune;
- int error;
-
- sync_filesystem(sb);
-
- spin_lock(>->gt_spin);
- args.ar_commit = gt->gt_logd_secs;
- args.ar_quota_quantum = gt->gt_quota_quantum;
- if (gt->gt_statfs_slow)
- args.ar_statfs_quantum = 0;
- else
- args.ar_statfs_quantum = gt->gt_statfs_quantum;
- spin_unlock(>->gt_spin);
- error = gfs2_mount_args(&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, localflocks) ||
- args_neq(&args, &sdp->sd_args, meta))
- return -EINVAL;
-
- if (sdp->sd_args.ar_spectator)
- *flags |= SB_RDONLY;
-
- if ((sb->s_flags ^ *flags) & SB_RDONLY) {
- if (*flags & SB_RDONLY)
- error = gfs2_make_fs_ro(sdp);
- else
- error = gfs2_make_fs_rw(sdp);
- if (error)
- return error;
- }
-
- sdp->sd_args = args;
- if (sdp->sd_args.ar_posix_acl)
- sb->s_flags |= SB_POSIXACL;
- else
- sb->s_flags &= ~SB_POSIXACL;
- if (sdp->sd_args.ar_nobarrier)
- set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
- else
- clear_bit(SDF_NOBARRIERS, &sdp->sd_flags);
- spin_lock(>->gt_spin);
- gt->gt_logd_secs = args.ar_commit;
- gt->gt_quota_quantum = args.ar_quota_quantum;
- if (args.ar_statfs_quantum) {
- gt->gt_statfs_slow = 0;
- gt->gt_statfs_quantum = args.ar_statfs_quantum;
- }
- else {
- gt->gt_statfs_slow = 1;
- gt->gt_statfs_quantum = 30;
- }
- spin_unlock(>->gt_spin);
-
- gfs2_online_uevent(sdp);
- return 0;
-}
-
/**
* gfs2_drop_inode - Drop an inode (test for remote unlink)
* @inode: The inode to drop
@@ -1758,7 +1426,6 @@ const struct super_operations gfs2_super_ops = {
.freeze_super = gfs2_freeze,
.thaw_super = gfs2_unfreeze,
.statfs = gfs2_statfs,
- .remount_fs = gfs2_remount_fs,
.drop_inode = gfs2_drop_inode,
.show_options = gfs2_show_options,
};
diff --git a/fs/gfs2/super.h b/fs/gfs2/super.h
index 73c97dccae21..b9dc2065dd72 100644
--- a/fs/gfs2/super.h
+++ b/fs/gfs2/super.h
@@ -27,8 +27,6 @@ static inline unsigned int gfs2_jindex_size(struct gfs2_sbd *sdp)
extern void gfs2_jindex_free(struct gfs2_sbd *sdp);
-extern int gfs2_mount_args(struct gfs2_args *args, char *data);
-
extern struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid);
extern int gfs2_jdesc_check(struct gfs2_jdesc *jd);
@@ -36,6 +34,7 @@ extern int gfs2_lookup_in_master_dir(struct gfs2_sbd *sdp, char *filename,
struct gfs2_inode **ipp);
extern int gfs2_make_fs_rw(struct gfs2_sbd *sdp);
+extern int gfs2_make_fs_ro(struct gfs2_sbd *sdp);
extern void gfs2_online_uevent(struct gfs2_sbd *sdp);
extern int gfs2_statfs_init(struct gfs2_sbd *sdp);
extern void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
--
2.20.1
