[Ocfs2-devel] [PATCH] ocfs2: Enable quota accounting on mount, disable on umount
Jan Kara
jack at suse.cz
Mon Oct 20 10:23:59 PDT 2008
Enable quota usage tracking on mount and disable it on umount. Also
add support for quota on and quota off quotactls and usrquota and
grpquota mount options.
Signed-off-by: Jan Kara <jack at suse.cz>
---
fs/ocfs2/ocfs2.h | 2 +
fs/ocfs2/super.c | 191 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 193 insertions(+), 0 deletions(-)
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 7f625f2..d1b8a9e 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -184,6 +184,8 @@ enum ocfs2_mount_options
OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */
+ OCFS2_MOUNT_USRQUOTA = 1 << 6, /* We support user quotas */
+ OCFS2_MOUNT_GRPQUOTA = 1 << 7, /* We support group quotas */
};
#define OCFS2_OSB_SOFT_RO 0x0001
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index e043814..c8281c9 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -41,6 +41,7 @@
#include <linux/debugfs.h>
#include <linux/mount.h>
#include <linux/seq_file.h>
+#include <linux/quotaops.h>
#define MLOG_MASK_PREFIX ML_SUPER
#include <cluster/masklog.h>
@@ -126,6 +127,8 @@ static int ocfs2_get_sector(struct super_block *sb,
static void ocfs2_write_super(struct super_block *sb);
static struct inode *ocfs2_alloc_inode(struct super_block *sb);
static void ocfs2_destroy_inode(struct inode *inode);
+static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
+static void ocfs2_disable_quotas(struct ocfs2_super *osb);
static const struct super_operations ocfs2_sops = {
.statfs = ocfs2_statfs,
@@ -159,6 +162,8 @@ enum {
Opt_localalloc,
Opt_localflocks,
Opt_stack,
+ Opt_usrquota,
+ Opt_grpquota,
Opt_err,
};
@@ -178,6 +183,8 @@ static match_table_t tokens = {
{Opt_localalloc, "localalloc=%d"},
{Opt_localflocks, "localflocks"},
{Opt_stack, "cluster_stack=%s"},
+ {Opt_usrquota, "usrquota"},
+ {Opt_grpquota, "grpquota"},
{Opt_err, NULL}
};
@@ -430,6 +437,9 @@ static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
/* We're going to/from readonly mode. */
if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
+ /* Disable quota accounting before remounting RO */
+ if (*flags & MS_RDONLY)
+ ocfs2_susp_quotas(osb, 0);
/* Lock here so the check of HARD_RO and the potential
* setting of SOFT_RO is atomic. */
spin_lock(&osb->osb_lock);
@@ -465,6 +475,9 @@ static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
}
unlock_osb:
spin_unlock(&osb->osb_lock);
+ /* Enable quota accounting after remounting RW */
+ if (!ret && !(*flags & MS_RDONLY))
+ ocfs2_susp_quotas(osb, 1);
}
if (!ret) {
@@ -623,6 +636,131 @@ static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
return 0;
}
+static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
+{
+ int type;
+ struct super_block *sb = osb->sb;
+ unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
+ OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
+ int status = 0;
+
+ for (type = 0; type < MAXQUOTAS; type++) {
+ if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
+ continue;
+ if (unsuspend)
+ status = vfs_quota_enable(
+ sb_dqopt(sb)->files[type],
+ type, QFMT_OCFS2,
+ DQUOT_SUSPENDED);
+ else
+ status = vfs_quota_disable(sb, type,
+ DQUOT_SUSPENDED);
+ if (status < 0)
+ break;
+ }
+ if (status < 0)
+ mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
+ "remount (error = %d).\n", status);
+ return status;
+}
+
+static int ocfs2_enable_quotas(struct ocfs2_super *osb)
+{
+ struct inode *inode[MAXQUOTAS] = { NULL, NULL };
+ struct super_block *sb = osb->sb;
+ unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
+ OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
+ unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
+ LOCAL_GROUP_QUOTA_SYSTEM_INODE };
+ int status;
+ int type;
+
+ sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
+ for (type = 0; type < MAXQUOTAS; type++) {
+ if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
+ continue;
+ inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
+ osb->slot_num);
+ if (!inode[type]) {
+ status = -ENOENT;
+ goto out_quota_off;
+ }
+ status = vfs_quota_enable(inode[type], type, QFMT_OCFS2,
+ DQUOT_USAGE_ENABLED);
+ if (status < 0)
+ goto out_quota_off;
+ }
+
+ for (type = 0; type < MAXQUOTAS; type++)
+ iput(inode[type]);
+ return 0;
+out_quota_off:
+ ocfs2_disable_quotas(osb);
+ for (type = 0; type < MAXQUOTAS; type++)
+ iput(inode[type]);
+ mlog_errno(status);
+ return status;
+}
+
+static void ocfs2_disable_quotas(struct ocfs2_super *osb)
+{
+ int type;
+ struct inode *inode;
+ struct super_block *sb = osb->sb;
+
+ /* We mostly ignore errors in this function because there's not much
+ * we can do when we see them */
+ for (type = 0; type < MAXQUOTAS; type++) {
+ if (!sb_has_quota_loaded(sb, type))
+ continue;
+ inode = igrab(sb->s_dquot.files[type]);
+ /* Turn off quotas. This will remove all dquot structures from
+ * memory and so they will be automatically synced to global
+ * quota files */
+ vfs_quota_disable(sb, type, DQUOT_USAGE_ENABLED |
+ DQUOT_LIMITS_ENABLED);
+ if (!inode)
+ continue;
+ iput(inode);
+ }
+}
+
+/* Handle quota on quotactl */
+static int ocfs2_quota_on(struct super_block *sb, int type, int format_id,
+ char *path, int remount)
+{
+ unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
+ OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
+
+ if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
+ return -EINVAL;
+
+ if (remount)
+ return 0; /* Just ignore it has been handled in
+ * ocfs2_remount() */
+ return vfs_quota_enable(sb_dqopt(sb)->files[type], type,
+ format_id, DQUOT_LIMITS_ENABLED);
+}
+
+/* Handle quota off quotactl */
+static int ocfs2_quota_off(struct super_block *sb, int type, int remount)
+{
+ if (remount)
+ return 0; /* Ignore now and handle later in
+ * ocfs2_remount() */
+ return vfs_quota_disable(sb, type, DQUOT_LIMITS_ENABLED);
+}
+
+static struct quotactl_ops ocfs2_quotactl_ops = {
+ .quota_on = ocfs2_quota_on,
+ .quota_off = ocfs2_quota_off,
+ .quota_sync = vfs_quota_sync,
+ .get_info = vfs_get_dqinfo,
+ .set_info = vfs_set_dqinfo,
+ .get_dqblk = vfs_get_dqblk,
+ .set_dqblk = vfs_set_dqblk,
+};
+
static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
{
struct dentry *root;
@@ -660,6 +798,22 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
osb->preferred_slot = parsed_options.slot;
osb->osb_commit_interval = parsed_options.commit_interval;
osb->local_alloc_size = parsed_options.localalloc_opt;
+ if (osb->s_mount_opt & OCFS2_MOUNT_USRQUOTA &&
+ !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
+ OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
+ status = -EINVAL;
+ mlog(ML_ERROR, "User quota requested but filesystem feature "
+ "is not set\n");
+ goto read_super_error;
+ }
+ if (osb->s_mount_opt & OCFS2_MOUNT_GRPQUOTA &&
+ !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
+ OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
+ status = -EINVAL;
+ mlog(ML_ERROR, "Group quota requested but filesystem feature "
+ "is not set\n");
+ goto read_super_error;
+ }
status = ocfs2_verify_userspace_stack(osb, &parsed_options);
if (status)
@@ -745,6 +899,13 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root = root;
+ /* Initialize quotas before we start truncation log recovery */
+ status = ocfs2_enable_quotas(osb);
+ if (status < 0) {
+ mlog_errno(status);
+ goto read_super_error;
+ }
+
ocfs2_complete_mount_recovery(osb);
if (ocfs2_mount_local(osb))
@@ -940,6 +1101,28 @@ static int ocfs2_parse_options(struct super_block *sb,
OCFS2_STACK_LABEL_LEN);
mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
break;
+ case Opt_usrquota:
+ /* We check only on remount, otherwise features
+ * aren't yet initialized. */
+ if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
+ OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
+ mlog(ML_ERROR, "User quota requested but "
+ "filesystem feature is not set\n");
+ status = 0;
+ goto bail;
+ }
+ mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
+ break;
+ case Opt_grpquota:
+ if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
+ OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
+ mlog(ML_ERROR, "Group quota requested but "
+ "filesystem feature is not set\n");
+ status = 0;
+ goto bail;
+ }
+ mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
+ break;
default:
mlog(ML_ERROR,
"Unrecognized mount option \"%s\" "
@@ -1001,6 +1184,10 @@ static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
if (osb->osb_cluster_stack[0])
seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
osb->osb_cluster_stack);
+ if (opts & OCFS2_MOUNT_USRQUOTA)
+ seq_printf(s, ",usrquota");
+ if (opts & OCFS2_MOUNT_GRPQUOTA)
+ seq_printf(s, ",grpquota");
return 0;
}
@@ -1313,6 +1500,8 @@ static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
osb = OCFS2_SB(sb);
BUG_ON(!osb);
+ ocfs2_disable_quotas(osb);
+
ocfs2_shutdown_local_alloc(osb);
ocfs2_truncate_log_shutdown(osb);
@@ -1423,6 +1612,8 @@ static int ocfs2_initialize_super(struct super_block *sb,
sb->s_fs_info = osb;
sb->s_op = &ocfs2_sops;
sb->s_export_op = &ocfs2_export_ops;
+ sb->s_qcop = &ocfs2_quotactl_ops;
+ sb->dq_op = &ocfs2_quota_operations;
sb->s_time_gran = 1;
sb->s_flags |= MS_NOATIME;
/* this is needed to support O_LARGEFILE */
--
1.5.2.4
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