mem_dqblk is extended to hold 64-bit quota limits, checks are added to deny
setting quota limits which aren't supported by a quota format module
Signed-off-by: Andrew Perepechko <andrew.perepechko@xxxxxxx>
---
fs/dquot.c | 22 +++++++++++++++++-----
fs/quota_v1.c | 3 +++
fs/quota_v2.c | 13 ++++++++-----
include/linux/quota.h | 12 +++++++-----
4 files changed, 35 insertions(+), 15 deletions(-)
diff -rNpu quota.orig/fs/dquot.c quota/fs/dquot.c
--- quota.orig/fs/dquot.c 2008-01-25 01:58:37.000000000 +0300
+++ quota/fs/dquot.c 2008-03-07 01:37:46.000000000 +0300
@@ -1703,10 +1703,19 @@ int vfs_get_dqblk(struct super_block *sb
}
/* Generic routine for setting common part of quota structure */
-static void do_set_dqblk(struct dquot *dquot, struct if_dqblk *di)
+static int do_set_dqblk(struct dquot *dquot, struct if_dqblk *di)
{
struct mem_dqblk *dm = &dquot->dq_dqb;
int check_blim = 0, check_ilim = 0;
+ struct mem_dqinfo *dqi = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_type];
+
+ if ((di->dqb_valid & QIF_BLIMITS &&
+ (di->dqb_bhardlimit > dqi->dqi_maxblimit ||
+ di->dqb_bsoftlimit > dqi->dqi_maxblimit)) ||
+ (di->dqb_valid & QIF_ILIMITS &&
+ (di->dqb_ihardlimit > dqi->dqi_maxilimit ||
+ di->dqb_isoftlimit > dqi->dqi_maxilimit)))
+ return -ERANGE;
spin_lock(&dq_data_lock);
if (di->dqb_valid & QIF_SPACE) {
@@ -1738,7 +1747,7 @@ static void do_set_dqblk(struct dquot *d
clear_bit(DQ_BLKS_B, &dquot->dq_flags);
}
else if (!(di->dqb_valid & QIF_BTIME)) /* Set grace only if user hasn't provided his own... */
- dm->dqb_btime = get_seconds() + sb_dqopt(dquot->dq_sb)->info[dquot->dq_type].dqi_bgrace;
+ dm->dqb_btime = get_seconds() + dqi->dqi_bgrace;
}
if (check_ilim) {
if (!dm->dqb_isoftlimit || dm->dqb_curinodes < dm->dqb_isoftlimit) {
@@ -1746,7 +1755,7 @@ static void do_set_dqblk(struct dquot *d
clear_bit(DQ_INODES_B, &dquot->dq_flags);
}
else if (!(di->dqb_valid & QIF_ITIME)) /* Set grace only if user hasn't provided his own... */
- dm->dqb_itime = get_seconds() + sb_dqopt(dquot->dq_sb)->info[dquot->dq_type].dqi_igrace;
+ dm->dqb_itime = get_seconds() + dqi->dqi_igrace;
}
if (dm->dqb_bhardlimit || dm->dqb_bsoftlimit || dm->dqb_ihardlimit || dm->dqb_isoftlimit)
clear_bit(DQ_FAKE_B, &dquot->dq_flags);
@@ -1754,21 +1763,24 @@ static void do_set_dqblk(struct dquot *d
set_bit(DQ_FAKE_B, &dquot->dq_flags);
spin_unlock(&dq_data_lock);
mark_dquot_dirty(dquot);
+
+ return 0;
}
int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di)
{
struct dquot *dquot;
+ int rc;
mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
if (!(dquot = dqget(sb, id, type))) {
mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
return -ESRCH;
}
- do_set_dqblk(dquot, di);
+ rc = do_set_dqblk(dquot, di);
dqput(dquot);
mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
- return 0;
+ return rc;
}
/* Generic routine for getting common part of quota file information */
diff -rNpu quota.orig/fs/quota_v1.c quota/fs/quota_v1.c
--- quota.orig/fs/quota_v1.c 2008-01-25 01:58:37.000000000 +0300
+++ quota/fs/quota_v1.c 2008-03-07 01:39:00.000000000 +0300
@@ -139,6 +139,9 @@ static int v1_read_file_info(struct supe
goto out;
}
ret = 0;
+ /* limits are stored as unsigned 32-bit data */
+ dqopt->info[type].dqi_maxblimit = 0xffffffff;
+ dqopt->info[type].dqi_maxilimit = 0xffffffff;
dqopt->info[type].dqi_igrace = dqblk.dqb_itime ? dqblk.dqb_itime : MAX_IQ_TIME;
dqopt->info[type].dqi_bgrace = dqblk.dqb_btime ? dqblk.dqb_btime : MAX_DQ_TIME;
out:
diff -rNpu quota.orig/fs/quota_v2.c quota/fs/quota_v2.c
--- quota.orig/fs/quota_v2.c 2008-01-25 01:58:37.000000000 +0300
+++ quota/fs/quota_v2.c 2008-03-07 02:40:23.000000000 +0300
@@ -59,6 +59,9 @@ static int v2_read_file_info(struct supe
sb->s_id);
return -1;
}
+ /* limits are stored as unsigned 32-bit data */
+ info->dqi_maxblimit = 0xffffffff;
+ info->dqi_maxilimit = 0xffffffff;
info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
info->dqi_flags = le32_to_cpu(dinfo.dqi_flags);
@@ -108,12 +113,12 @@ static void disk2memdqb(struct mem_dqblk
static void mem2diskdqb(struct v2_disk_dqblk *d, struct mem_dqblk *m, qid_t id)
{
- d->dqb_ihardlimit = cpu_to_le32(m->dqb_ihardlimit);
- d->dqb_isoftlimit = cpu_to_le32(m->dqb_isoftlimit);
- d->dqb_curinodes = cpu_to_le32(m->dqb_curinodes);
+ d->dqb_ihardlimit = cpu_to_le32((u32)m->dqb_ihardlimit);
+ d->dqb_isoftlimit = cpu_to_le32((u32)m->dqb_isoftlimit);
+ d->dqb_curinodes = cpu_to_le32((u32)m->dqb_curinodes);
d->dqb_itime = cpu_to_le64(m->dqb_itime);
- d->dqb_bhardlimit = cpu_to_le32(m->dqb_bhardlimit);
- d->dqb_bsoftlimit = cpu_to_le32(m->dqb_bsoftlimit);
+ d->dqb_bhardlimit = cpu_to_le32((u32)m->dqb_bhardlimit);
+ d->dqb_bsoftlimit = cpu_to_le32((u32)m->dqb_bsoftlimit);
d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
d->dqb_btime = cpu_to_le64(m->dqb_btime);
d->dqb_id = cpu_to_le32(id);
diff -rNpu quota.orig/include/linux/quota.h quota/include/linux/quota.h
--- quota.orig/include/linux/quota.h 2008-01-25 01:58:37.000000000 +0300
+++ quota/include/linux/quota.h 2008-03-06 23:18:10.000000000 +0300
@@ -181,12 +181,12 @@ extern spinlock_t dq_data_lock;
* Data for one user/group kept in memory
*/
struct mem_dqblk {
- __u32 dqb_bhardlimit; /* absolute limit on disk blks alloc */
- __u32 dqb_bsoftlimit; /* preferred limit on disk blks */
+ qsize_t dqb_bhardlimit; /* absolute limit on disk blks alloc */
+ qsize_t dqb_bsoftlimit; /* preferred limit on disk blks */
qsize_t dqb_curspace; /* current used space */
- __u32 dqb_ihardlimit; /* absolute limit on allocated inodes */
- __u32 dqb_isoftlimit; /* preferred inode limit */
- __u32 dqb_curinodes; /* current # allocated inodes */
+ qsize_t dqb_ihardlimit; /* absolute limit on allocated inodes */
+ qsize_t dqb_isoftlimit; /* preferred inode limit */
+ qsize_t dqb_curinodes; /* current # allocated inodes */
time_t dqb_btime; /* time limit for excessive disk use */
time_t dqb_itime; /* time limit for excessive inode use */
};
@@ -202,6 +202,8 @@ struct mem_dqinfo {
unsigned long dqi_flags;
unsigned int dqi_bgrace;
unsigned int dqi_igrace;
+ qsize_t dqi_maxblimit;
+ qsize_t dqi_maxilimit;
union {
struct v1_mem_dqinfo v1_i;
struct v2_mem_dqinfo v2_i;
--
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