diff options
Diffstat (limited to 'fs/quota/quota_v2.c')
| -rw-r--r-- | fs/quota/quota_v2.c | 165 |
1 files changed, 132 insertions, 33 deletions
diff --git a/fs/quota/quota_v2.c b/fs/quota/quota_v2.c index 01f25eae684..3dfc23e0213 100644 --- a/fs/quota/quota_v2.c +++ b/fs/quota/quota_v2.c @@ -23,14 +23,23 @@ MODULE_LICENSE("GPL"); #define __QUOTA_V2_PARANOIA -static void v2_mem2diskdqb(void *dp, struct dquot *dquot); -static void v2_disk2memdqb(struct dquot *dquot, void *dp); -static int v2_is_id(void *dp, struct dquot *dquot); - -static struct qtree_fmt_operations v2_qtree_ops = { - .mem2disk_dqblk = v2_mem2diskdqb, - .disk2mem_dqblk = v2_disk2memdqb, - .is_id = v2_is_id, +static void v2r0_mem2diskdqb(void *dp, struct dquot *dquot); +static void v2r0_disk2memdqb(struct dquot *dquot, void *dp); +static int v2r0_is_id(void *dp, struct dquot *dquot); +static void v2r1_mem2diskdqb(void *dp, struct dquot *dquot); +static void v2r1_disk2memdqb(struct dquot *dquot, void *dp); +static int v2r1_is_id(void *dp, struct dquot *dquot); + +static struct qtree_fmt_operations v2r0_qtree_ops = { + .mem2disk_dqblk = v2r0_mem2diskdqb, + .disk2mem_dqblk = v2r0_disk2memdqb, + .is_id = v2r0_is_id, +}; + +static struct qtree_fmt_operations v2r1_qtree_ops = { + .mem2disk_dqblk = v2r1_mem2diskdqb, + .disk2mem_dqblk = v2r1_disk2memdqb, + .is_id = v2r1_is_id, }; #define QUOTABLOCK_BITS 10 @@ -46,23 +55,33 @@ static inline qsize_t v2_qbtos(qsize_t blocks) return blocks << QUOTABLOCK_BITS; } +static int v2_read_header(struct super_block *sb, int type, + struct v2_disk_dqheader *dqhead) +{ + ssize_t size; + + size = sb->s_op->quota_read(sb, type, (char *)dqhead, + sizeof(struct v2_disk_dqheader), 0); + if (size != sizeof(struct v2_disk_dqheader)) { + printk(KERN_WARNING "quota_v2: Failed header read:" + " expected=%zd got=%zd\n", + sizeof(struct v2_disk_dqheader), size); + return 0; + } + return 1; +} + /* Check whether given file is really vfsv0 quotafile */ static int v2_check_quota_file(struct super_block *sb, int type) { struct v2_disk_dqheader dqhead; - ssize_t size; static const uint quota_magics[] = V2_INITQMAGICS; static const uint quota_versions[] = V2_INITQVERSIONS; - size = sb->s_op->quota_read(sb, type, (char *)&dqhead, - sizeof(struct v2_disk_dqheader), 0); - if (size != sizeof(struct v2_disk_dqheader)) { - printk("quota_v2: failed read expected=%zd got=%zd\n", - sizeof(struct v2_disk_dqheader), size); + if (!v2_read_header(sb, type, &dqhead)) return 0; - } if (le32_to_cpu(dqhead.dqh_magic) != quota_magics[type] || - le32_to_cpu(dqhead.dqh_version) != quota_versions[type]) + le32_to_cpu(dqhead.dqh_version) > quota_versions[type]) return 0; return 1; } @@ -71,14 +90,20 @@ static int v2_check_quota_file(struct super_block *sb, int type) static int v2_read_file_info(struct super_block *sb, int type) { struct v2_disk_dqinfo dinfo; + struct v2_disk_dqheader dqhead; struct mem_dqinfo *info = sb_dqinfo(sb, type); struct qtree_mem_dqinfo *qinfo; ssize_t size; + unsigned int version; + + if (!v2_read_header(sb, type, &dqhead)) + return 0; + version = le32_to_cpu(dqhead.dqh_version); size = sb->s_op->quota_read(sb, type, (char *)&dinfo, sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF); if (size != sizeof(struct v2_disk_dqinfo)) { - printk(KERN_WARNING "Can't read info structure on device %s.\n", + printk(KERN_WARNING "quota_v2: Can't read info structure on device %s.\n", sb->s_id); return -1; } @@ -89,9 +114,15 @@ static int v2_read_file_info(struct super_block *sb, int type) return -1; } qinfo = info->dqi_priv; - /* limits are stored as unsigned 32-bit data */ - info->dqi_maxblimit = 0xffffffff; - info->dqi_maxilimit = 0xffffffff; + if (version == 0) { + /* limits are stored as unsigned 32-bit data */ + info->dqi_maxblimit = 0xffffffff; + info->dqi_maxilimit = 0xffffffff; + } else { + /* used space is stored as unsigned 64-bit value */ + info->dqi_maxblimit = 0xffffffffffffffff; /* 2^64-1 */ + info->dqi_maxilimit = 0xffffffffffffffff; + } 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); @@ -103,8 +134,13 @@ static int v2_read_file_info(struct super_block *sb, int type) qinfo->dqi_blocksize_bits = V2_DQBLKSIZE_BITS; qinfo->dqi_usable_bs = 1 << V2_DQBLKSIZE_BITS; qinfo->dqi_qtree_depth = qtree_depth(qinfo); - qinfo->dqi_entry_size = sizeof(struct v2_disk_dqblk); - qinfo->dqi_ops = &v2_qtree_ops; + if (version == 0) { + qinfo->dqi_entry_size = sizeof(struct v2r0_disk_dqblk); + qinfo->dqi_ops = &v2r0_qtree_ops; + } else { + qinfo->dqi_entry_size = sizeof(struct v2r1_disk_dqblk); + qinfo->dqi_ops = &v2r1_qtree_ops; + } return 0; } @@ -135,9 +171,9 @@ static int v2_write_file_info(struct super_block *sb, int type) return 0; } -static void v2_disk2memdqb(struct dquot *dquot, void *dp) +static void v2r0_disk2memdqb(struct dquot *dquot, void *dp) { - struct v2_disk_dqblk *d = dp, empty; + struct v2r0_disk_dqblk *d = dp, empty; struct mem_dqblk *m = &dquot->dq_dqb; m->dqb_ihardlimit = le32_to_cpu(d->dqb_ihardlimit); @@ -149,15 +185,15 @@ static void v2_disk2memdqb(struct dquot *dquot, void *dp) m->dqb_curspace = le64_to_cpu(d->dqb_curspace); m->dqb_btime = le64_to_cpu(d->dqb_btime); /* We need to escape back all-zero structure */ - memset(&empty, 0, sizeof(struct v2_disk_dqblk)); + memset(&empty, 0, sizeof(struct v2r0_disk_dqblk)); empty.dqb_itime = cpu_to_le64(1); - if (!memcmp(&empty, dp, sizeof(struct v2_disk_dqblk))) + if (!memcmp(&empty, dp, sizeof(struct v2r0_disk_dqblk))) m->dqb_itime = 0; } -static void v2_mem2diskdqb(void *dp, struct dquot *dquot) +static void v2r0_mem2diskdqb(void *dp, struct dquot *dquot) { - struct v2_disk_dqblk *d = dp; + struct v2r0_disk_dqblk *d = dp; struct mem_dqblk *m = &dquot->dq_dqb; struct qtree_mem_dqinfo *info = sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; @@ -175,9 +211,60 @@ static void v2_mem2diskdqb(void *dp, struct dquot *dquot) d->dqb_itime = cpu_to_le64(1); } -static int v2_is_id(void *dp, struct dquot *dquot) +static int v2r0_is_id(void *dp, struct dquot *dquot) +{ + struct v2r0_disk_dqblk *d = dp; + struct qtree_mem_dqinfo *info = + sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; + + if (qtree_entry_unused(info, dp)) + return 0; + return le32_to_cpu(d->dqb_id) == dquot->dq_id; +} + +static void v2r1_disk2memdqb(struct dquot *dquot, void *dp) +{ + struct v2r1_disk_dqblk *d = dp, empty; + struct mem_dqblk *m = &dquot->dq_dqb; + + m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit); + m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit); + m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes); + m->dqb_itime = le64_to_cpu(d->dqb_itime); + m->dqb_bhardlimit = v2_qbtos(le64_to_cpu(d->dqb_bhardlimit)); + m->dqb_bsoftlimit = v2_qbtos(le64_to_cpu(d->dqb_bsoftlimit)); + m->dqb_curspace = le64_to_cpu(d->dqb_curspace); + m->dqb_btime = le64_to_cpu(d->dqb_btime); + /* We need to escape back all-zero structure */ + memset(&empty, 0, sizeof(struct v2r1_disk_dqblk)); + empty.dqb_itime = cpu_to_le64(1); + if (!memcmp(&empty, dp, sizeof(struct v2r1_disk_dqblk))) + m->dqb_itime = 0; +} + +static void v2r1_mem2diskdqb(void *dp, struct dquot *dquot) +{ + struct v2r1_disk_dqblk *d = dp; + struct mem_dqblk *m = &dquot->dq_dqb; + struct qtree_mem_dqinfo *info = + sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; + + d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit); + d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit); + d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes); + d->dqb_itime = cpu_to_le64(m->dqb_itime); + d->dqb_bhardlimit = cpu_to_le64(v2_stoqb(m->dqb_bhardlimit)); + d->dqb_bsoftlimit = cpu_to_le64(v2_stoqb(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(dquot->dq_id); + if (qtree_entry_unused(info, dp)) + d->dqb_itime = cpu_to_le64(1); +} + +static int v2r1_is_id(void *dp, struct dquot *dquot) { - struct v2_disk_dqblk *d = dp; + struct v2r1_disk_dqblk *d = dp; struct qtree_mem_dqinfo *info = sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; @@ -217,20 +304,32 @@ static const struct quota_format_ops v2_format_ops = { .release_dqblk = v2_release_dquot, }; -static struct quota_format_type v2_quota_format = { +static struct quota_format_type v2r0_quota_format = { .qf_fmt_id = QFMT_VFS_V0, .qf_ops = &v2_format_ops, .qf_owner = THIS_MODULE }; +static struct quota_format_type v2r1_quota_format = { + .qf_fmt_id = QFMT_VFS_V1, + .qf_ops = &v2_format_ops, + .qf_owner = THIS_MODULE +}; + static int __init init_v2_quota_format(void) { - return register_quota_format(&v2_quota_format); + int ret; + + ret = register_quota_format(&v2r0_quota_format); + if (ret) + return ret; + return register_quota_format(&v2r1_quota_format); } static void __exit exit_v2_quota_format(void) { - unregister_quota_format(&v2_quota_format); + unregister_quota_format(&v2r0_quota_format); + unregister_quota_format(&v2r1_quota_format); } module_init(init_v2_quota_format); |