Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Quota code necessary even when VFS quota support is not compiled |
| 3 | * into the kernel. The interesting stuff is over in dquot.c, here |
| 4 | * we have symbols for initial quotactl(2) handling, the sysctl(2) |
| 5 | * variables, etc - things needed even when quota support disabled. |
| 6 | */ |
| 7 | |
| 8 | #include <linux/fs.h> |
| 9 | #include <linux/namei.h> |
| 10 | #include <linux/slab.h> |
| 11 | #include <asm/current.h> |
Jeff Liu | f3da931 | 2012-05-28 23:40:17 +0800 | [diff] [blame] | 12 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/security.h> |
| 15 | #include <linux/syscalls.h> |
Randy Dunlap | 16f7e0f | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 16 | #include <linux/capability.h> |
Adrian Bunk | be586ba | 2005-11-07 00:59:35 -0800 | [diff] [blame] | 17 | #include <linux/quotaops.h> |
Vasily Tarasov | b716395 | 2007-07-15 23:41:12 -0700 | [diff] [blame] | 18 | #include <linux/types.h> |
Christoph Hellwig | 8c4e4ac | 2010-02-16 03:44:51 -0500 | [diff] [blame] | 19 | #include <linux/writeback.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
Christoph Hellwig | c988afb | 2010-02-16 03:44:50 -0500 | [diff] [blame] | 21 | static int check_quotactl_permission(struct super_block *sb, int type, int cmd, |
| 22 | qid_t id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | { |
Christoph Hellwig | c988afb | 2010-02-16 03:44:50 -0500 | [diff] [blame] | 24 | switch (cmd) { |
| 25 | /* these commands do not require any special privilegues */ |
| 26 | case Q_GETFMT: |
| 27 | case Q_SYNC: |
| 28 | case Q_GETINFO: |
| 29 | case Q_XGETQSTAT: |
Chandra Seetharaman | af30cb4 | 2013-08-06 17:27:07 -0500 | [diff] [blame] | 30 | case Q_XGETQSTATV: |
Christoph Hellwig | c988afb | 2010-02-16 03:44:50 -0500 | [diff] [blame] | 31 | case Q_XQUOTASYNC: |
| 32 | break; |
| 33 | /* allow to query information for dquots we "own" */ |
| 34 | case Q_GETQUOTA: |
| 35 | case Q_XGETQUOTA: |
Eric W. Biederman | 74a8a10 | 2012-09-16 02:07:49 -0700 | [diff] [blame] | 36 | if ((type == USRQUOTA && uid_eq(current_euid(), make_kuid(current_user_ns(), id))) || |
| 37 | (type == GRPQUOTA && in_egroup_p(make_kgid(current_user_ns(), id)))) |
Christoph Hellwig | c988afb | 2010-02-16 03:44:50 -0500 | [diff] [blame] | 38 | break; |
| 39 | /*FALLTHROUGH*/ |
| 40 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | if (!capable(CAP_SYS_ADMIN)) |
| 42 | return -EPERM; |
| 43 | } |
| 44 | |
Christoph Hellwig | c988afb | 2010-02-16 03:44:50 -0500 | [diff] [blame] | 45 | return security_quotactl(cmd, type, id, sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | } |
| 47 | |
Al Viro | 01a05b3 | 2010-03-23 06:06:58 -0400 | [diff] [blame] | 48 | static void quota_sync_one(struct super_block *sb, void *arg) |
| 49 | { |
Jan Kara | 2c5f648 | 2014-09-30 10:43:09 +0200 | [diff] [blame] | 50 | int type = *(int *)arg; |
| 51 | |
| 52 | if (sb->s_qcop && sb->s_qcop->quota_sync && |
| 53 | (sb->s_quota_types & (1 << type))) |
| 54 | sb->s_qcop->quota_sync(sb, type); |
Al Viro | 01a05b3 | 2010-03-23 06:06:58 -0400 | [diff] [blame] | 55 | } |
| 56 | |
Christoph Hellwig | 6ae0957 | 2010-02-16 03:44:49 -0500 | [diff] [blame] | 57 | static int quota_sync_all(int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | { |
Christoph Hellwig | 6ae0957 | 2010-02-16 03:44:49 -0500 | [diff] [blame] | 59 | int ret; |
| 60 | |
| 61 | if (type >= MAXQUOTAS) |
| 62 | return -EINVAL; |
| 63 | ret = security_quotactl(Q_SYNC, type, 0, NULL); |
Al Viro | 01a05b3 | 2010-03-23 06:06:58 -0400 | [diff] [blame] | 64 | if (!ret) |
| 65 | iterate_supers(quota_sync_one, &type); |
| 66 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | } |
| 68 | |
Jan Kara | d3b8632 | 2014-10-08 16:07:12 +0200 | [diff] [blame] | 69 | unsigned int qtype_enforce_flag(int type) |
| 70 | { |
| 71 | switch (type) { |
| 72 | case USRQUOTA: |
| 73 | return FS_QUOTA_UDQ_ENFD; |
| 74 | case GRPQUOTA: |
| 75 | return FS_QUOTA_GDQ_ENFD; |
| 76 | case PRJQUOTA: |
| 77 | return FS_QUOTA_PDQ_ENFD; |
| 78 | } |
| 79 | return 0; |
| 80 | } |
| 81 | |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 82 | static int quota_quotaon(struct super_block *sb, int type, int cmd, qid_t id, |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 83 | struct path *path) |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 84 | { |
Jan Kara | aaa3dae | 2014-10-08 18:35:31 +0200 | [diff] [blame] | 85 | if (!sb->s_qcop->quota_on && !sb->s_qcop->quota_enable) |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 86 | return -ENOSYS; |
Jan Kara | d3b8632 | 2014-10-08 16:07:12 +0200 | [diff] [blame] | 87 | if (sb->s_qcop->quota_enable) |
| 88 | return sb->s_qcop->quota_enable(sb, qtype_enforce_flag(type)); |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 89 | if (IS_ERR(path)) |
| 90 | return PTR_ERR(path); |
| 91 | return sb->s_qcop->quota_on(sb, type, id, path); |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 92 | } |
| 93 | |
Jan Kara | d3b8632 | 2014-10-08 16:07:12 +0200 | [diff] [blame] | 94 | static int quota_quotaoff(struct super_block *sb, int type) |
| 95 | { |
| 96 | if (!sb->s_qcop->quota_off && !sb->s_qcop->quota_disable) |
| 97 | return -ENOSYS; |
| 98 | if (sb->s_qcop->quota_disable) |
| 99 | return sb->s_qcop->quota_disable(sb, qtype_enforce_flag(type)); |
| 100 | return sb->s_qcop->quota_off(sb, type); |
| 101 | } |
| 102 | |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 103 | static int quota_getfmt(struct super_block *sb, int type, void __user *addr) |
| 104 | { |
| 105 | __u32 fmt; |
| 106 | |
Niu Yawei | 606cdcc | 2014-06-04 12:19:12 +0800 | [diff] [blame] | 107 | mutex_lock(&sb_dqopt(sb)->dqonoff_mutex); |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 108 | if (!sb_has_quota_active(sb, type)) { |
Niu Yawei | 606cdcc | 2014-06-04 12:19:12 +0800 | [diff] [blame] | 109 | mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex); |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 110 | return -ESRCH; |
| 111 | } |
| 112 | fmt = sb_dqopt(sb)->info[type].dqi_format->qf_fmt_id; |
Niu Yawei | 606cdcc | 2014-06-04 12:19:12 +0800 | [diff] [blame] | 113 | mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex); |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 114 | if (copy_to_user(addr, &fmt, sizeof(fmt))) |
| 115 | return -EFAULT; |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | static int quota_getinfo(struct super_block *sb, int type, void __user *addr) |
| 120 | { |
Jan Kara | 0a240339 | 2014-11-19 00:42:09 +0100 | [diff] [blame^] | 121 | struct qc_state state; |
| 122 | struct qc_type_state *tstate; |
| 123 | struct if_dqinfo uinfo; |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 124 | int ret; |
| 125 | |
Jan Kara | 0a240339 | 2014-11-19 00:42:09 +0100 | [diff] [blame^] | 126 | /* This checks whether qc_state has enough entries... */ |
| 127 | BUILD_BUG_ON(MAXQUOTAS > XQM_MAXQUOTAS); |
| 128 | if (!sb->s_qcop->get_state) |
Christoph Hellwig | f450d4f | 2010-02-16 03:44:48 -0500 | [diff] [blame] | 129 | return -ENOSYS; |
Jan Kara | 0a240339 | 2014-11-19 00:42:09 +0100 | [diff] [blame^] | 130 | ret = sb->s_qcop->get_state(sb, &state); |
| 131 | if (ret) |
| 132 | return ret; |
| 133 | tstate = state.s_state + type; |
| 134 | if (!(tstate->flags & QCI_ACCT_ENABLED)) |
| 135 | return -ESRCH; |
| 136 | memset(&uinfo, 0, sizeof(uinfo)); |
| 137 | uinfo.dqi_bgrace = tstate->spc_timelimit; |
| 138 | uinfo.dqi_igrace = tstate->ino_timelimit; |
| 139 | if (tstate->flags & QCI_SYSFILE) |
| 140 | uinfo.dqi_flags |= DQF_SYS_FILE; |
| 141 | if (tstate->flags & QCI_ROOT_SQUASH) |
| 142 | uinfo.dqi_flags |= DQF_ROOT_SQUASH; |
| 143 | uinfo.dqi_valid = IIF_ALL; |
| 144 | if (!ret && copy_to_user(addr, &uinfo, sizeof(uinfo))) |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 145 | return -EFAULT; |
| 146 | return ret; |
| 147 | } |
| 148 | |
| 149 | static int quota_setinfo(struct super_block *sb, int type, void __user *addr) |
| 150 | { |
| 151 | struct if_dqinfo info; |
| 152 | |
| 153 | if (copy_from_user(&info, addr, sizeof(info))) |
| 154 | return -EFAULT; |
Christoph Hellwig | f450d4f | 2010-02-16 03:44:48 -0500 | [diff] [blame] | 155 | if (!sb->s_qcop->set_info) |
| 156 | return -ENOSYS; |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 157 | return sb->s_qcop->set_info(sb, type, &info); |
| 158 | } |
| 159 | |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 160 | static inline qsize_t qbtos(qsize_t blocks) |
| 161 | { |
| 162 | return blocks << QIF_DQBLKSIZE_BITS; |
| 163 | } |
| 164 | |
| 165 | static inline qsize_t stoqb(qsize_t space) |
| 166 | { |
| 167 | return (space + QIF_DQBLKSIZE - 1) >> QIF_DQBLKSIZE_BITS; |
| 168 | } |
| 169 | |
| 170 | static void copy_to_if_dqblk(struct if_dqblk *dst, struct qc_dqblk *src) |
Christoph Hellwig | b9b2dd3 | 2010-05-06 17:04:58 -0400 | [diff] [blame] | 171 | { |
Dan Carpenter | 18da65e | 2013-11-01 13:21:54 +0300 | [diff] [blame] | 172 | memset(dst, 0, sizeof(*dst)); |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 173 | dst->dqb_bhardlimit = stoqb(src->d_spc_hardlimit); |
| 174 | dst->dqb_bsoftlimit = stoqb(src->d_spc_softlimit); |
| 175 | dst->dqb_curspace = src->d_space; |
Christoph Hellwig | b9b2dd3 | 2010-05-06 17:04:58 -0400 | [diff] [blame] | 176 | dst->dqb_ihardlimit = src->d_ino_hardlimit; |
| 177 | dst->dqb_isoftlimit = src->d_ino_softlimit; |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 178 | dst->dqb_curinodes = src->d_ino_count; |
| 179 | dst->dqb_btime = src->d_spc_timer; |
| 180 | dst->dqb_itime = src->d_ino_timer; |
Christoph Hellwig | b9b2dd3 | 2010-05-06 17:04:58 -0400 | [diff] [blame] | 181 | dst->dqb_valid = QIF_ALL; |
| 182 | } |
| 183 | |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 184 | static int quota_getquota(struct super_block *sb, int type, qid_t id, |
| 185 | void __user *addr) |
| 186 | { |
Eric W. Biederman | 74a8a10 | 2012-09-16 02:07:49 -0700 | [diff] [blame] | 187 | struct kqid qid; |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 188 | struct qc_dqblk fdq; |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 189 | struct if_dqblk idq; |
| 190 | int ret; |
| 191 | |
Christoph Hellwig | f450d4f | 2010-02-16 03:44:48 -0500 | [diff] [blame] | 192 | if (!sb->s_qcop->get_dqblk) |
| 193 | return -ENOSYS; |
Eric W. Biederman | 74a8a10 | 2012-09-16 02:07:49 -0700 | [diff] [blame] | 194 | qid = make_kqid(current_user_ns(), type, id); |
| 195 | if (!qid_valid(qid)) |
| 196 | return -EINVAL; |
| 197 | ret = sb->s_qcop->get_dqblk(sb, qid, &fdq); |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 198 | if (ret) |
| 199 | return ret; |
Christoph Hellwig | b9b2dd3 | 2010-05-06 17:04:58 -0400 | [diff] [blame] | 200 | copy_to_if_dqblk(&idq, &fdq); |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 201 | if (copy_to_user(addr, &idq, sizeof(idq))) |
| 202 | return -EFAULT; |
| 203 | return 0; |
| 204 | } |
| 205 | |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 206 | static void copy_from_if_dqblk(struct qc_dqblk *dst, struct if_dqblk *src) |
Christoph Hellwig | c472b43 | 2010-05-06 17:05:17 -0400 | [diff] [blame] | 207 | { |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 208 | dst->d_spc_hardlimit = qbtos(src->dqb_bhardlimit); |
| 209 | dst->d_spc_softlimit = qbtos(src->dqb_bsoftlimit); |
| 210 | dst->d_space = src->dqb_curspace; |
Christoph Hellwig | c472b43 | 2010-05-06 17:05:17 -0400 | [diff] [blame] | 211 | dst->d_ino_hardlimit = src->dqb_ihardlimit; |
| 212 | dst->d_ino_softlimit = src->dqb_isoftlimit; |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 213 | dst->d_ino_count = src->dqb_curinodes; |
| 214 | dst->d_spc_timer = src->dqb_btime; |
| 215 | dst->d_ino_timer = src->dqb_itime; |
Christoph Hellwig | c472b43 | 2010-05-06 17:05:17 -0400 | [diff] [blame] | 216 | |
| 217 | dst->d_fieldmask = 0; |
| 218 | if (src->dqb_valid & QIF_BLIMITS) |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 219 | dst->d_fieldmask |= QC_SPC_SOFT | QC_SPC_HARD; |
Christoph Hellwig | c472b43 | 2010-05-06 17:05:17 -0400 | [diff] [blame] | 220 | if (src->dqb_valid & QIF_SPACE) |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 221 | dst->d_fieldmask |= QC_SPACE; |
Christoph Hellwig | c472b43 | 2010-05-06 17:05:17 -0400 | [diff] [blame] | 222 | if (src->dqb_valid & QIF_ILIMITS) |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 223 | dst->d_fieldmask |= QC_INO_SOFT | QC_INO_HARD; |
Christoph Hellwig | c472b43 | 2010-05-06 17:05:17 -0400 | [diff] [blame] | 224 | if (src->dqb_valid & QIF_INODES) |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 225 | dst->d_fieldmask |= QC_INO_COUNT; |
Christoph Hellwig | c472b43 | 2010-05-06 17:05:17 -0400 | [diff] [blame] | 226 | if (src->dqb_valid & QIF_BTIME) |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 227 | dst->d_fieldmask |= QC_SPC_TIMER; |
Christoph Hellwig | c472b43 | 2010-05-06 17:05:17 -0400 | [diff] [blame] | 228 | if (src->dqb_valid & QIF_ITIME) |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 229 | dst->d_fieldmask |= QC_INO_TIMER; |
Christoph Hellwig | c472b43 | 2010-05-06 17:05:17 -0400 | [diff] [blame] | 230 | } |
| 231 | |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 232 | static int quota_setquota(struct super_block *sb, int type, qid_t id, |
| 233 | void __user *addr) |
| 234 | { |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 235 | struct qc_dqblk fdq; |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 236 | struct if_dqblk idq; |
Eric W. Biederman | 74a8a10 | 2012-09-16 02:07:49 -0700 | [diff] [blame] | 237 | struct kqid qid; |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 238 | |
| 239 | if (copy_from_user(&idq, addr, sizeof(idq))) |
| 240 | return -EFAULT; |
Christoph Hellwig | f450d4f | 2010-02-16 03:44:48 -0500 | [diff] [blame] | 241 | if (!sb->s_qcop->set_dqblk) |
| 242 | return -ENOSYS; |
Eric W. Biederman | 74a8a10 | 2012-09-16 02:07:49 -0700 | [diff] [blame] | 243 | qid = make_kqid(current_user_ns(), type, id); |
| 244 | if (!qid_valid(qid)) |
| 245 | return -EINVAL; |
Christoph Hellwig | c472b43 | 2010-05-06 17:05:17 -0400 | [diff] [blame] | 246 | copy_from_if_dqblk(&fdq, &idq); |
Eric W. Biederman | 74a8a10 | 2012-09-16 02:07:49 -0700 | [diff] [blame] | 247 | return sb->s_qcop->set_dqblk(sb, qid, &fdq); |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 248 | } |
| 249 | |
Jan Kara | 38e478c | 2014-10-08 15:56:21 +0200 | [diff] [blame] | 250 | static int quota_enable(struct super_block *sb, void __user *addr) |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 251 | { |
| 252 | __u32 flags; |
| 253 | |
| 254 | if (copy_from_user(&flags, addr, sizeof(flags))) |
| 255 | return -EFAULT; |
Jan Kara | 38e478c | 2014-10-08 15:56:21 +0200 | [diff] [blame] | 256 | if (!sb->s_qcop->quota_enable) |
Christoph Hellwig | f450d4f | 2010-02-16 03:44:48 -0500 | [diff] [blame] | 257 | return -ENOSYS; |
Jan Kara | 38e478c | 2014-10-08 15:56:21 +0200 | [diff] [blame] | 258 | return sb->s_qcop->quota_enable(sb, flags); |
| 259 | } |
| 260 | |
| 261 | static int quota_disable(struct super_block *sb, void __user *addr) |
| 262 | { |
| 263 | __u32 flags; |
| 264 | |
| 265 | if (copy_from_user(&flags, addr, sizeof(flags))) |
| 266 | return -EFAULT; |
| 267 | if (!sb->s_qcop->quota_disable) |
| 268 | return -ENOSYS; |
| 269 | return sb->s_qcop->quota_disable(sb, flags); |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 270 | } |
| 271 | |
| 272 | static int quota_getxstate(struct super_block *sb, void __user *addr) |
| 273 | { |
| 274 | struct fs_quota_stat fqs; |
| 275 | int ret; |
Christoph Hellwig | f450d4f | 2010-02-16 03:44:48 -0500 | [diff] [blame] | 276 | |
| 277 | if (!sb->s_qcop->get_xstate) |
| 278 | return -ENOSYS; |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 279 | ret = sb->s_qcop->get_xstate(sb, &fqs); |
| 280 | if (!ret && copy_to_user(addr, &fqs, sizeof(fqs))) |
| 281 | return -EFAULT; |
| 282 | return ret; |
| 283 | } |
| 284 | |
Chandra Seetharaman | af30cb4 | 2013-08-06 17:27:07 -0500 | [diff] [blame] | 285 | static int quota_getxstatev(struct super_block *sb, void __user *addr) |
| 286 | { |
| 287 | struct fs_quota_statv fqs; |
| 288 | int ret; |
| 289 | |
| 290 | if (!sb->s_qcop->get_xstatev) |
| 291 | return -ENOSYS; |
| 292 | |
| 293 | memset(&fqs, 0, sizeof(fqs)); |
| 294 | if (copy_from_user(&fqs, addr, 1)) /* Just read qs_version */ |
| 295 | return -EFAULT; |
| 296 | |
| 297 | /* If this kernel doesn't support user specified version, fail */ |
| 298 | switch (fqs.qs_version) { |
| 299 | case FS_QSTATV_VERSION1: |
| 300 | break; |
| 301 | default: |
| 302 | return -EINVAL; |
| 303 | } |
| 304 | ret = sb->s_qcop->get_xstatev(sb, &fqs); |
| 305 | if (!ret && copy_to_user(addr, &fqs, sizeof(fqs))) |
| 306 | return -EFAULT; |
| 307 | return ret; |
| 308 | } |
| 309 | |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 310 | /* |
| 311 | * XFS defines BBTOB and BTOBB macros inside fs/xfs/ and we cannot move them |
| 312 | * out of there as xfsprogs rely on definitions being in that header file. So |
| 313 | * just define same functions here for quota purposes. |
| 314 | */ |
| 315 | #define XFS_BB_SHIFT 9 |
| 316 | |
| 317 | static inline u64 quota_bbtob(u64 blocks) |
| 318 | { |
| 319 | return blocks << XFS_BB_SHIFT; |
| 320 | } |
| 321 | |
| 322 | static inline u64 quota_btobb(u64 bytes) |
| 323 | { |
| 324 | return (bytes + (1 << XFS_BB_SHIFT) - 1) >> XFS_BB_SHIFT; |
| 325 | } |
| 326 | |
| 327 | static void copy_from_xfs_dqblk(struct qc_dqblk *dst, struct fs_disk_quota *src) |
| 328 | { |
| 329 | dst->d_spc_hardlimit = quota_bbtob(src->d_blk_hardlimit); |
| 330 | dst->d_spc_softlimit = quota_bbtob(src->d_blk_softlimit); |
| 331 | dst->d_ino_hardlimit = src->d_ino_hardlimit; |
| 332 | dst->d_ino_softlimit = src->d_ino_softlimit; |
| 333 | dst->d_space = quota_bbtob(src->d_bcount); |
| 334 | dst->d_ino_count = src->d_icount; |
| 335 | dst->d_ino_timer = src->d_itimer; |
| 336 | dst->d_spc_timer = src->d_btimer; |
| 337 | dst->d_ino_warns = src->d_iwarns; |
| 338 | dst->d_spc_warns = src->d_bwarns; |
| 339 | dst->d_rt_spc_hardlimit = quota_bbtob(src->d_rtb_hardlimit); |
| 340 | dst->d_rt_spc_softlimit = quota_bbtob(src->d_rtb_softlimit); |
| 341 | dst->d_rt_space = quota_bbtob(src->d_rtbcount); |
| 342 | dst->d_rt_spc_timer = src->d_rtbtimer; |
| 343 | dst->d_rt_spc_warns = src->d_rtbwarns; |
| 344 | dst->d_fieldmask = 0; |
| 345 | if (src->d_fieldmask & FS_DQ_ISOFT) |
| 346 | dst->d_fieldmask |= QC_INO_SOFT; |
| 347 | if (src->d_fieldmask & FS_DQ_IHARD) |
| 348 | dst->d_fieldmask |= QC_INO_HARD; |
| 349 | if (src->d_fieldmask & FS_DQ_BSOFT) |
| 350 | dst->d_fieldmask |= QC_SPC_SOFT; |
| 351 | if (src->d_fieldmask & FS_DQ_BHARD) |
| 352 | dst->d_fieldmask |= QC_SPC_HARD; |
| 353 | if (src->d_fieldmask & FS_DQ_RTBSOFT) |
| 354 | dst->d_fieldmask |= QC_RT_SPC_SOFT; |
| 355 | if (src->d_fieldmask & FS_DQ_RTBHARD) |
| 356 | dst->d_fieldmask |= QC_RT_SPC_HARD; |
| 357 | if (src->d_fieldmask & FS_DQ_BTIMER) |
| 358 | dst->d_fieldmask |= QC_SPC_TIMER; |
| 359 | if (src->d_fieldmask & FS_DQ_ITIMER) |
| 360 | dst->d_fieldmask |= QC_INO_TIMER; |
| 361 | if (src->d_fieldmask & FS_DQ_RTBTIMER) |
| 362 | dst->d_fieldmask |= QC_RT_SPC_TIMER; |
| 363 | if (src->d_fieldmask & FS_DQ_BWARNS) |
| 364 | dst->d_fieldmask |= QC_SPC_WARNS; |
| 365 | if (src->d_fieldmask & FS_DQ_IWARNS) |
| 366 | dst->d_fieldmask |= QC_INO_WARNS; |
| 367 | if (src->d_fieldmask & FS_DQ_RTBWARNS) |
| 368 | dst->d_fieldmask |= QC_RT_SPC_WARNS; |
| 369 | if (src->d_fieldmask & FS_DQ_BCOUNT) |
| 370 | dst->d_fieldmask |= QC_SPACE; |
| 371 | if (src->d_fieldmask & FS_DQ_ICOUNT) |
| 372 | dst->d_fieldmask |= QC_INO_COUNT; |
| 373 | if (src->d_fieldmask & FS_DQ_RTBCOUNT) |
| 374 | dst->d_fieldmask |= QC_RT_SPACE; |
| 375 | } |
| 376 | |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 377 | static int quota_setxquota(struct super_block *sb, int type, qid_t id, |
| 378 | void __user *addr) |
| 379 | { |
| 380 | struct fs_disk_quota fdq; |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 381 | struct qc_dqblk qdq; |
Eric W. Biederman | 74a8a10 | 2012-09-16 02:07:49 -0700 | [diff] [blame] | 382 | struct kqid qid; |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 383 | |
| 384 | if (copy_from_user(&fdq, addr, sizeof(fdq))) |
| 385 | return -EFAULT; |
Christoph Hellwig | c472b43 | 2010-05-06 17:05:17 -0400 | [diff] [blame] | 386 | if (!sb->s_qcop->set_dqblk) |
Christoph Hellwig | f450d4f | 2010-02-16 03:44:48 -0500 | [diff] [blame] | 387 | return -ENOSYS; |
Eric W. Biederman | 74a8a10 | 2012-09-16 02:07:49 -0700 | [diff] [blame] | 388 | qid = make_kqid(current_user_ns(), type, id); |
| 389 | if (!qid_valid(qid)) |
| 390 | return -EINVAL; |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 391 | copy_from_xfs_dqblk(&qdq, &fdq); |
| 392 | return sb->s_qcop->set_dqblk(sb, qid, &qdq); |
| 393 | } |
| 394 | |
| 395 | static void copy_to_xfs_dqblk(struct fs_disk_quota *dst, struct qc_dqblk *src, |
| 396 | int type, qid_t id) |
| 397 | { |
| 398 | memset(dst, 0, sizeof(*dst)); |
| 399 | dst->d_version = FS_DQUOT_VERSION; |
| 400 | dst->d_id = id; |
| 401 | if (type == USRQUOTA) |
| 402 | dst->d_flags = FS_USER_QUOTA; |
| 403 | else if (type == PRJQUOTA) |
| 404 | dst->d_flags = FS_PROJ_QUOTA; |
| 405 | else |
| 406 | dst->d_flags = FS_GROUP_QUOTA; |
| 407 | dst->d_blk_hardlimit = quota_btobb(src->d_spc_hardlimit); |
| 408 | dst->d_blk_softlimit = quota_btobb(src->d_spc_softlimit); |
| 409 | dst->d_ino_hardlimit = src->d_ino_hardlimit; |
| 410 | dst->d_ino_softlimit = src->d_ino_softlimit; |
| 411 | dst->d_bcount = quota_btobb(src->d_space); |
| 412 | dst->d_icount = src->d_ino_count; |
| 413 | dst->d_itimer = src->d_ino_timer; |
| 414 | dst->d_btimer = src->d_spc_timer; |
| 415 | dst->d_iwarns = src->d_ino_warns; |
| 416 | dst->d_bwarns = src->d_spc_warns; |
| 417 | dst->d_rtb_hardlimit = quota_btobb(src->d_rt_spc_hardlimit); |
| 418 | dst->d_rtb_softlimit = quota_btobb(src->d_rt_spc_softlimit); |
| 419 | dst->d_rtbcount = quota_btobb(src->d_rt_space); |
| 420 | dst->d_rtbtimer = src->d_rt_spc_timer; |
| 421 | dst->d_rtbwarns = src->d_rt_spc_warns; |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 422 | } |
| 423 | |
| 424 | static int quota_getxquota(struct super_block *sb, int type, qid_t id, |
| 425 | void __user *addr) |
| 426 | { |
| 427 | struct fs_disk_quota fdq; |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 428 | struct qc_dqblk qdq; |
Eric W. Biederman | 74a8a10 | 2012-09-16 02:07:49 -0700 | [diff] [blame] | 429 | struct kqid qid; |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 430 | int ret; |
| 431 | |
Christoph Hellwig | b9b2dd3 | 2010-05-06 17:04:58 -0400 | [diff] [blame] | 432 | if (!sb->s_qcop->get_dqblk) |
Christoph Hellwig | f450d4f | 2010-02-16 03:44:48 -0500 | [diff] [blame] | 433 | return -ENOSYS; |
Eric W. Biederman | 74a8a10 | 2012-09-16 02:07:49 -0700 | [diff] [blame] | 434 | qid = make_kqid(current_user_ns(), type, id); |
| 435 | if (!qid_valid(qid)) |
| 436 | return -EINVAL; |
Jan Kara | 14bf61f | 2014-10-09 16:03:13 +0200 | [diff] [blame] | 437 | ret = sb->s_qcop->get_dqblk(sb, qid, &qdq); |
| 438 | if (ret) |
| 439 | return ret; |
| 440 | copy_to_xfs_dqblk(&fdq, &qdq, type, id); |
| 441 | if (copy_to_user(addr, &fdq, sizeof(fdq))) |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 442 | return -EFAULT; |
| 443 | return ret; |
| 444 | } |
| 445 | |
Eric Sandeen | 9da93f9 | 2014-05-05 17:25:50 +1000 | [diff] [blame] | 446 | static int quota_rmxquota(struct super_block *sb, void __user *addr) |
| 447 | { |
| 448 | __u32 flags; |
| 449 | |
| 450 | if (copy_from_user(&flags, addr, sizeof(flags))) |
| 451 | return -EFAULT; |
| 452 | if (!sb->s_qcop->rm_xquota) |
| 453 | return -ENOSYS; |
| 454 | return sb->s_qcop->rm_xquota(sb, flags); |
| 455 | } |
| 456 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | /* Copy parameters and call proper function */ |
Jan Kara | 268157b | 2009-01-27 15:47:22 +0100 | [diff] [blame] | 458 | static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id, |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 459 | void __user *addr, struct path *path) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | { |
Christoph Hellwig | c988afb | 2010-02-16 03:44:50 -0500 | [diff] [blame] | 461 | int ret; |
| 462 | |
| 463 | if (type >= (XQM_COMMAND(cmd) ? XQM_MAXQUOTAS : MAXQUOTAS)) |
| 464 | return -EINVAL; |
Jan Kara | 2c5f648 | 2014-09-30 10:43:09 +0200 | [diff] [blame] | 465 | /* |
| 466 | * Quota not supported on this fs? Check this before s_quota_types |
| 467 | * since they needn't be set if quota is not supported at all. |
| 468 | */ |
Christoph Hellwig | c988afb | 2010-02-16 03:44:50 -0500 | [diff] [blame] | 469 | if (!sb->s_qcop) |
| 470 | return -ENOSYS; |
Jan Kara | 2c5f648 | 2014-09-30 10:43:09 +0200 | [diff] [blame] | 471 | if (!(sb->s_quota_types & (1 << type))) |
| 472 | return -EINVAL; |
Christoph Hellwig | c988afb | 2010-02-16 03:44:50 -0500 | [diff] [blame] | 473 | |
| 474 | ret = check_quotactl_permission(sb, type, cmd, id); |
| 475 | if (ret < 0) |
| 476 | return ret; |
| 477 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | switch (cmd) { |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 479 | case Q_QUOTAON: |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 480 | return quota_quotaon(sb, type, cmd, id, path); |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 481 | case Q_QUOTAOFF: |
Jan Kara | d3b8632 | 2014-10-08 16:07:12 +0200 | [diff] [blame] | 482 | return quota_quotaoff(sb, type); |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 483 | case Q_GETFMT: |
| 484 | return quota_getfmt(sb, type, addr); |
| 485 | case Q_GETINFO: |
| 486 | return quota_getinfo(sb, type, addr); |
| 487 | case Q_SETINFO: |
| 488 | return quota_setinfo(sb, type, addr); |
| 489 | case Q_GETQUOTA: |
| 490 | return quota_getquota(sb, type, id, addr); |
| 491 | case Q_SETQUOTA: |
| 492 | return quota_setquota(sb, type, id, addr); |
| 493 | case Q_SYNC: |
Christoph Hellwig | 6ae0957 | 2010-02-16 03:44:49 -0500 | [diff] [blame] | 494 | if (!sb->s_qcop->quota_sync) |
| 495 | return -ENOSYS; |
Jan Kara | ceed172 | 2012-07-03 16:45:28 +0200 | [diff] [blame] | 496 | return sb->s_qcop->quota_sync(sb, type); |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 497 | case Q_XQUOTAON: |
Jan Kara | 38e478c | 2014-10-08 15:56:21 +0200 | [diff] [blame] | 498 | return quota_enable(sb, addr); |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 499 | case Q_XQUOTAOFF: |
Jan Kara | 38e478c | 2014-10-08 15:56:21 +0200 | [diff] [blame] | 500 | return quota_disable(sb, addr); |
Eric Sandeen | 9da93f9 | 2014-05-05 17:25:50 +1000 | [diff] [blame] | 501 | case Q_XQUOTARM: |
| 502 | return quota_rmxquota(sb, addr); |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 503 | case Q_XGETQSTAT: |
| 504 | return quota_getxstate(sb, addr); |
Chandra Seetharaman | af30cb4 | 2013-08-06 17:27:07 -0500 | [diff] [blame] | 505 | case Q_XGETQSTATV: |
| 506 | return quota_getxstatev(sb, addr); |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 507 | case Q_XSETQLIM: |
| 508 | return quota_setxquota(sb, type, id, addr); |
| 509 | case Q_XGETQUOTA: |
| 510 | return quota_getxquota(sb, type, id, addr); |
| 511 | case Q_XQUOTASYNC: |
Christoph Hellwig | 8c4e4ac | 2010-02-16 03:44:51 -0500 | [diff] [blame] | 512 | if (sb->s_flags & MS_RDONLY) |
| 513 | return -EROFS; |
Christoph Hellwig | 4b217ed | 2012-02-20 02:28:18 +0000 | [diff] [blame] | 514 | /* XFS quotas are fully coherent now, making this call a noop */ |
Christoph Hellwig | 8c4e4ac | 2010-02-16 03:44:51 -0500 | [diff] [blame] | 515 | return 0; |
Christoph Hellwig | c411e5f | 2010-02-16 03:44:47 -0500 | [diff] [blame] | 516 | default: |
Christoph Hellwig | f450d4f | 2010-02-16 03:44:48 -0500 | [diff] [blame] | 517 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | } |
| 520 | |
Lee Jones | 56df127 | 2012-11-03 23:02:28 +0100 | [diff] [blame] | 521 | #ifdef CONFIG_BLOCK |
| 522 | |
Jan Kara | dcdbed8 | 2012-02-10 11:03:01 +0100 | [diff] [blame] | 523 | /* Return 1 if 'cmd' will block on frozen filesystem */ |
| 524 | static int quotactl_cmd_write(int cmd) |
| 525 | { |
| 526 | switch (cmd) { |
| 527 | case Q_GETFMT: |
| 528 | case Q_GETINFO: |
| 529 | case Q_SYNC: |
| 530 | case Q_XGETQSTAT: |
Chandra Seetharaman | af30cb4 | 2013-08-06 17:27:07 -0500 | [diff] [blame] | 531 | case Q_XGETQSTATV: |
Jan Kara | dcdbed8 | 2012-02-10 11:03:01 +0100 | [diff] [blame] | 532 | case Q_XGETQUOTA: |
| 533 | case Q_XQUOTASYNC: |
| 534 | return 0; |
| 535 | } |
| 536 | return 1; |
| 537 | } |
| 538 | |
Lee Jones | 56df127 | 2012-11-03 23:02:28 +0100 | [diff] [blame] | 539 | #endif /* CONFIG_BLOCK */ |
| 540 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | /* |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 542 | * look up a superblock on which quota ops will be performed |
| 543 | * - use the name of a block device to find the superblock thereon |
| 544 | */ |
Jan Kara | dcdbed8 | 2012-02-10 11:03:01 +0100 | [diff] [blame] | 545 | static struct super_block *quotactl_block(const char __user *special, int cmd) |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 546 | { |
| 547 | #ifdef CONFIG_BLOCK |
| 548 | struct block_device *bdev; |
| 549 | struct super_block *sb; |
Jeff Layton | 91a27b2 | 2012-10-10 15:25:28 -0400 | [diff] [blame] | 550 | struct filename *tmp = getname(special); |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 551 | |
| 552 | if (IS_ERR(tmp)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 553 | return ERR_CAST(tmp); |
Jeff Layton | 91a27b2 | 2012-10-10 15:25:28 -0400 | [diff] [blame] | 554 | bdev = lookup_bdev(tmp->name); |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 555 | putname(tmp); |
| 556 | if (IS_ERR(bdev)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 557 | return ERR_CAST(bdev); |
Jan Kara | dcdbed8 | 2012-02-10 11:03:01 +0100 | [diff] [blame] | 558 | if (quotactl_cmd_write(cmd)) |
| 559 | sb = get_super_thawed(bdev); |
| 560 | else |
| 561 | sb = get_super(bdev); |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 562 | bdput(bdev); |
| 563 | if (!sb) |
| 564 | return ERR_PTR(-ENODEV); |
| 565 | |
| 566 | return sb; |
| 567 | #else |
| 568 | return ERR_PTR(-ENODEV); |
| 569 | #endif |
| 570 | } |
| 571 | |
| 572 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | * This is the system call interface. This communicates with |
| 574 | * the user-level programs. Currently this only supports diskquota |
| 575 | * calls. Maybe we need to add the process quotas etc. in the future, |
| 576 | * but we probably should use rlimits for that. |
| 577 | */ |
Heiko Carstens | 3cdad42 | 2009-01-14 14:14:22 +0100 | [diff] [blame] | 578 | SYSCALL_DEFINE4(quotactl, unsigned int, cmd, const char __user *, special, |
| 579 | qid_t, id, void __user *, addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | { |
| 581 | uint cmds, type; |
| 582 | struct super_block *sb = NULL; |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 583 | struct path path, *pathp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | int ret; |
| 585 | |
| 586 | cmds = cmd >> SUBCMDSHIFT; |
| 587 | type = cmd & SUBCMDMASK; |
| 588 | |
Christoph Hellwig | 6ae0957 | 2010-02-16 03:44:49 -0500 | [diff] [blame] | 589 | /* |
| 590 | * As a special case Q_SYNC can be called without a specific device. |
| 591 | * It will iterate all superblocks that have quota enabled and call |
| 592 | * the sync action on each of them. |
| 593 | */ |
| 594 | if (!special) { |
| 595 | if (cmds == Q_SYNC) |
| 596 | return quota_sync_all(type); |
| 597 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | } |
| 599 | |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 600 | /* |
| 601 | * Path for quotaon has to be resolved before grabbing superblock |
| 602 | * because that gets s_umount sem which is also possibly needed by path |
| 603 | * resolution (think about autofs) and thus deadlocks could arise. |
| 604 | */ |
| 605 | if (cmds == Q_QUOTAON) { |
Trond Myklebust | 815d405 | 2011-09-26 20:36:09 -0400 | [diff] [blame] | 606 | ret = user_path_at(AT_FDCWD, addr, LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT, &path); |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 607 | if (ret) |
| 608 | pathp = ERR_PTR(ret); |
| 609 | else |
| 610 | pathp = &path; |
| 611 | } |
| 612 | |
Jan Kara | dcdbed8 | 2012-02-10 11:03:01 +0100 | [diff] [blame] | 613 | sb = quotactl_block(special, cmds); |
Jan Kara | 0aaa618 | 2011-10-10 18:32:06 +0200 | [diff] [blame] | 614 | if (IS_ERR(sb)) { |
| 615 | ret = PTR_ERR(sb); |
| 616 | goto out; |
| 617 | } |
Christoph Hellwig | 6ae0957 | 2010-02-16 03:44:49 -0500 | [diff] [blame] | 618 | |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 619 | ret = do_quotactl(sb, type, cmds, id, addr, pathp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | |
Christoph Hellwig | 6ae0957 | 2010-02-16 03:44:49 -0500 | [diff] [blame] | 621 | drop_super(sb); |
Jan Kara | 0aaa618 | 2011-10-10 18:32:06 +0200 | [diff] [blame] | 622 | out: |
Jan Kara | f00c9e4 | 2010-09-15 17:38:58 +0200 | [diff] [blame] | 623 | if (pathp && !IS_ERR(pathp)) |
| 624 | path_put(pathp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | return ret; |
| 626 | } |