Messages in this thread Patch in this message | | | From | Craig Christophel <> | Subject | Quota patches for 2.5 - 12 | Date | Sun, 3 Mar 2002 04:57:21 -0500 |
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Here is the twelveth of 13 patches.
This patch adds a compatibility interface (aka old style) to the code and an option to enable it.
diff -urN -X txt/diff-exclude linux-2.5-linus/fs/Config.in linux-2.5/fs/Config.in --- linux-2.5-linus/fs/Config.in Sun Mar 3 03:30:20 2002 +++ linux-2.5/fs/Config.in Sun Mar 3 03:43:44 2002 @@ -7,6 +7,12 @@ bool 'Quota support' CONFIG_QUOTA dep_tristate ' Old quota format support' CONFIG_QFMT_V1 $CONFIG_QUOTA dep_tristate ' VFS v0 quota format support' CONFIG_QFMT_V2 $CONFIG_QUOTA +dep_mbool ' Compatible quota interfaces' CONFIG_QIFACE_COMPAT $CONFIG_QUOTA +if [ "$CONFIG_QUOTA" = "y" -a "$CONFIG_QIFACE_COMPAT" = "y" ]; then + choice ' Compatible quota interfaces' \ + "Original CONFIG_QIFACE_V1 \ + VFSv0 CONFIG_QIFACE_V2" Original +fi tristate 'Kernel automounter support' CONFIG_AUTOFS_FS tristate 'Kernel automounter version 4 support (also supports v3)' CONFIG_AUTOFS4_FS diff -urN -X txt/diff-exclude linux-2.5-linus/fs/quota.c linux-2.5/fs/quota.c --- linux-2.5-linus/fs/quota.c Sun Mar 3 03:17:12 2002 +++ linux-2.5/fs/quota.c Sun Mar 3 03:43:44 2002 @@ -12,6 +12,10 @@ #include <linux/kernel.h> #include <linux/smp_lock.h> #include <linux/quotaops.h> +#ifdef CONFIG_QIFACE_COMPAT +#include <linux/quotacompat.h> +#endif + int nr_dquots, nr_free_dquots; @@ -232,6 +236,371 @@ return 0; } +#ifdef CONFIG_QIFACE_COMPAT +static int check_compat_quotactl_valid(struct super_block *sb, int type, int cmd, qid_t id) +{ + if (type >= MAXQUOTAS) + return -EINVAL; + /* Is operation supported? */ + if (!sb->s_qcop) + return -ENOSYS; + + switch (cmd) { + case Q_COMP_QUOTAON: + if (!sb->s_qcop->quota_on) + return -ENOSYS; + break; + case Q_COMP_QUOTAOFF: + if (!sb->s_qcop->quota_off) + return -ENOSYS; + break; + case Q_COMP_SYNC: + if (!sb->s_qcop->quota_sync) + return -ENOSYS; + break; +#ifdef CONFIG_QIFACE_V2 + case Q_V2_SETFLAGS: + case Q_V2_SETGRACE: + case Q_V2_SETINFO: + if (!sb->s_qcop->set_info) + return -ENOSYS; + break; + case Q_V2_GETINFO: + if (!sb->s_qcop->get_info) + return -ENOSYS; + break; + case Q_V2_SETQLIM: + case Q_V2_SETUSE: + case Q_V2_SETQUOTA: + if (!sb->s_qcop->set_dqblk) + return -ENOSYS; + break; + case Q_V2_GETQUOTA: + if (!sb->s_qcop->get_dqblk) + return -ENOSYS; + break; + case Q_V2_GETSTATS: + break; +#endif +#ifdef CONFIG_QIFACE_V1 + case Q_V1_SETQLIM: + case Q_V1_SETUSE: + case Q_V1_SETQUOTA: + if (!sb->s_qcop->set_dqblk) + return -ENOSYS; + break; + case Q_V1_GETQUOTA: + if (!sb->s_qcop->get_dqblk) + return -ENOSYS; + break; + case Q_V1_RSQUASH: + if (!sb->s_qcop->set_info) + return -ENOSYS; + break; + case Q_V1_GETSTATS: + break; +#endif + default: + return -EINVAL; + } + +#ifdef CONFIG_QIFACE_V1 + if (cmd != Q_COMP_QUOTAON && cmd != Q_COMP_QUOTAOFF && cmd != Q_COMP_SYNC && sb_dqopt(sb)->info[type].dqi_format->qf_fmt_id != QFMT_VFS_OLD) +#else + if (cmd != Q_COMP_QUOTAON && cmd != Q_COMP_QUOTAOFF && cmd != Q_COMP_SYNC && sb_dqopt(sb)->info[type].dqi_format->qf_fmt_id != QFMT_VFS_V0) +#endif + return -ESRCH; + + /* Is quota turned on for commands which need it? */ + switch (cmd) { + case Q_V2_SETFLAGS: + case Q_V2_SETGRACE: + case Q_V2_SETINFO: + case Q_V2_GETINFO: + case Q_COMP_QUOTAOFF: + case Q_V1_RSQUASH: + case Q_V1_SETQUOTA: + case Q_V1_SETQLIM: + case Q_V1_SETUSE: + case Q_V2_SETQUOTA: + /* Q_V2_SETQLIM: collision with Q_V1_SETQLIM */ + case Q_V2_SETUSE: + case Q_V1_GETQUOTA: + case Q_V2_GETQUOTA: + if (!sb_has_quota_enabled(sb, type)) + return -ESRCH; + } + /* Check privileges */ + if (cmd == Q_V1_GETQUOTA || cmd == Q_V2_GETQUOTA) { + if (((type == USRQUOTA && current->euid != id) || + (type == GRPQUOTA && !in_egroup_p(id))) && + !capable(CAP_SYS_ADMIN)) + return -EPERM; + } + else if (cmd != Q_V1_GETSTATS && cmd != Q_V2_GETSTATS && cmd != Q_V2_GETINFO && cmd != Q_COMP_SYNC) + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + return 0; +} + +static int v1_set_rsquash(struct super_block *sb, int type, int flag) +{ + struct if_dqinfo info; + + info.dqi_valid = IIF_FLAGS; + info.dqi_flags = flag ? V1_DQF_RSQUASH : 0; + return sb->s_qcop->set_info(sb, type, &info); +} + +static int v1_get_dqblk(struct super_block *sb, int type, qid_t id, struct v1c_mem_dqblk *mdq) +{ + struct if_dqblk idq; + int ret; + + if ((ret = sb->s_qcop->get_dqblk(sb, type, id, &idq)) < 0) + return ret; + mdq->dqb_ihardlimit = idq.dqb_ihardlimit; + mdq->dqb_isoftlimit = idq.dqb_isoftlimit; + mdq->dqb_curinodes = idq.dqb_curinodes; + mdq->dqb_bhardlimit = idq.dqb_bhardlimit; + mdq->dqb_bsoftlimit = idq.dqb_bsoftlimit; + mdq->dqb_curblocks = toqb(idq.dqb_curspace); + mdq->dqb_itime = idq.dqb_itime; + mdq->dqb_btime = idq.dqb_btime; + if (id == 0) { /* Times for id 0 are in fact grace times */ + struct if_dqinfo info; + + if ((ret = sb->s_qcop->get_info(sb, type, &info)) < 0) + return ret; + mdq->dqb_btime = info.dqi_bgrace; + mdq->dqb_itime = info.dqi_igrace; + } + return 0; +} + +static int v1_set_dqblk(struct super_block *sb, int type, int cmd, qid_t id, struct v1c_mem_dqblk *mdq) +{ + struct if_dqblk idq; + int ret; + + idq.dqb_valid = 0; + if (cmd == Q_V1_SETQUOTA || cmd == Q_V1_SETQLIM) { + idq.dqb_ihardlimit = mdq->dqb_ihardlimit; + idq.dqb_isoftlimit = mdq->dqb_isoftlimit; + idq.dqb_bhardlimit = mdq->dqb_bhardlimit; + idq.dqb_bsoftlimit = mdq->dqb_bsoftlimit; + idq.dqb_valid |= QIF_LIMITS; + } + if (cmd == Q_V1_SETQUOTA || cmd == Q_V1_SETUSE) { + idq.dqb_curinodes = mdq->dqb_curinodes; + idq.dqb_curspace = ((qsize_t)mdq->dqb_curblocks) << QUOTABLOCK_BITS; + idq.dqb_valid |= QIF_USAGE; + } + ret = sb->s_qcop->set_dqblk(sb, type, id, &idq); + if (!ret && id == 0 && cmd == Q_V1_SETQUOTA) { /* Times for id 0 are in fact grace times */ + struct if_dqinfo info; + + info.dqi_bgrace = mdq->dqb_btime; + info.dqi_igrace = mdq->dqb_itime; + info.dqi_valid = IIF_BGRACE | IIF_IGRACE; + ret = sb->s_qcop->set_info(sb, type, &info); + } + return ret; +} + +static void v1_get_stats(struct v1c_dqstats *dst) +{ + memcpy(dst, &dqstats, sizeof(dqstats)); +} + +static int v2_get_info(struct super_block *sb, int type, struct v2c_mem_dqinfo *oinfo) +{ + struct if_dqinfo info; + int ret; + + if ((ret = sb->s_qcop->get_info(sb, type, &info)) < 0) + return ret; + oinfo->dqi_bgrace = info.dqi_bgrace; + oinfo->dqi_igrace = info.dqi_igrace; + oinfo->dqi_flags = info.dqi_flags; + oinfo->dqi_blocks = sb_dqopt(sb)->info[type].u.v2_i.dqi_blocks; + oinfo->dqi_free_blk = sb_dqopt(sb)->info[type].u.v2_i.dqi_free_blk; + oinfo->dqi_free_entry = sb_dqopt(sb)->info[type].u.v2_i.dqi_free_entry; + return 0; +} + +static int v2_set_info(struct super_block *sb, int type, int cmd, struct v2c_mem_dqinfo *oinfo) +{ + struct if_dqinfo info; + + info.dqi_valid = 0; + if (cmd == Q_V2_SETGRACE || cmd == Q_V2_SETQUOTA) { + info.dqi_bgrace = oinfo->dqi_bgrace; + info.dqi_igrace = oinfo->dqi_igrace; + info.dqi_valid |= IIF_BGRACE | IIF_IGRACE; + } + if (cmd == Q_V2_SETFLAGS || cmd == Q_V2_SETQUOTA) { + info.dqi_flags = oinfo->dqi_flags; + info.dqi_valid |= IIF_FLAGS; + } + /* We don't simulate deadly effects of setting other parameters ;-) */ + return sb->s_qcop->set_info(sb, type, &info); +} + +static int v2_get_dqblk(struct super_block *sb, int type, qid_t id, struct v2c_mem_dqblk *mdq) +{ + struct if_dqblk idq; + int ret; + + if ((ret = sb->s_qcop->get_dqblk(sb, type, id, &idq)) < 0) + return ret; + mdq->dqb_ihardlimit = idq.dqb_ihardlimit; + mdq->dqb_isoftlimit = idq.dqb_isoftlimit; + mdq->dqb_curinodes = idq.dqb_curinodes; + mdq->dqb_bhardlimit = idq.dqb_bhardlimit; + mdq->dqb_bsoftlimit = idq.dqb_bsoftlimit; + mdq->dqb_curspace = idq.dqb_curspace; + mdq->dqb_itime = idq.dqb_itime; + mdq->dqb_btime = idq.dqb_btime; + return 0; +} + +static int v2_set_dqblk(struct super_block *sb, int type, int cmd, qid_t id, struct v2c_mem_dqblk *mdq) +{ + struct if_dqblk idq; + + idq.dqb_valid = 0; + if (cmd == Q_V2_SETQUOTA || cmd == Q_V2_SETQLIM) { + idq.dqb_ihardlimit = mdq->dqb_ihardlimit; + idq.dqb_isoftlimit = mdq->dqb_isoftlimit; + idq.dqb_bhardlimit = mdq->dqb_bhardlimit; + idq.dqb_bsoftlimit = mdq->dqb_bsoftlimit; + idq.dqb_valid |= QIF_LIMITS; + } + if (cmd == Q_V2_SETQUOTA || cmd == Q_V2_SETUSE) { + idq.dqb_curinodes = mdq->dqb_curinodes; + idq.dqb_curspace = mdq->dqb_curspace; + idq.dqb_valid |= QIF_USAGE; + } + return sb->s_qcop->set_dqblk(sb, type, id, &idq); +} + +static void v2_get_stats(struct v2c_dqstats *dst) +{ + memcpy(dst, &dqstats, sizeof(dqstats)); + dst->version = __DQUOT_NUM_VERSION__; +} + +/* Handle requests to old interface */ +static int do_compat_quotactl(struct super_block *sb, int type, int cmd, qid_t id, caddr_t addr) +{ + int ret; + + switch (cmd) { + case Q_COMP_QUOTAON: { + char *pathname; + + if (IS_ERR(pathname = getname(addr))) + return PTR_ERR(pathname); +#ifdef CONFIG_QIFACE_V1 + ret = sb->s_qcop->quota_on(sb, type, QFMT_VFS_OLD, pathname); +#else + ret = sb->s_qcop->quota_on(sb, type, QFMT_VFS_V0, pathname); +#endif + putname(pathname); + return ret; + } + case Q_COMP_QUOTAOFF: + return sb->s_qcop->quota_off(sb, type); + case Q_COMP_SYNC: + return sb->s_qcop->quota_sync(sb, type); + case Q_V1_RSQUASH: { + int flag; + + if (copy_from_user(&flag, addr, sizeof(flag))) + return -EFAULT; + return v1_set_rsquash(sb, type, flag); + } + case Q_V1_GETQUOTA: { + struct v1c_mem_dqblk mdq; + + if ((ret = v1_get_dqblk(sb, type, id, &mdq))) + return ret; + if (copy_to_user(addr, &mdq, sizeof(mdq))) + return -EFAULT; + return 0; + } + /* We must resolve collision of Q_V1_SETQLIM and Q_V2_SETQLIM */ + case Q_V1_SETQLIM: + case Q_V1_SETUSE: + case Q_V1_SETQUOTA: + case Q_V2_SETUSE: + /* Q_V2_SETQLIM collision with Q_V1_SETQLIM */ + case Q_V2_SETQUOTA: + if (sb_dqopt(sb)->info[type].dqi_format->qf_fmt_id == QFMT_VFS_V0) { + struct v2c_mem_dqblk mdq; + + if (copy_from_user(&mdq, addr, sizeof(mdq))) + return -EFAULT; + return v2_set_dqblk(sb, type, cmd, id, &mdq); + } + else { + struct v1c_mem_dqblk mdq; + + if (copy_from_user(&mdq, addr, sizeof(mdq))) + return -EFAULT; + return v1_set_dqblk(sb, type, cmd, id, &mdq); + } + case Q_V1_GETSTATS: { + struct v1c_dqstats dst; + + v1_get_stats(&dst); + if (copy_to_user(addr, &dst, sizeof(dst))) + return -EFAULT; + return 0; + } + case Q_V2_GETINFO: { + struct v2c_mem_dqinfo info; + + if ((ret = v2_get_info(sb, type, &info))) + return ret; + if (copy_to_user(addr, &info, sizeof(info))) + return -EFAULT; + return 0; + } + case Q_V2_SETFLAGS: + case Q_V2_SETGRACE: + case Q_V2_SETINFO: { + struct v2c_mem_dqinfo info; + + if (copy_from_user(&info, addr, sizeof(info))) + return -EFAULT; + + return v2_set_info(sb, type, cmd, &info); + } + case Q_V2_GETQUOTA: { + struct v2c_mem_dqblk mdq; + + if ((ret = v2_get_dqblk(sb, type, id, &mdq))) + return ret; + if (copy_to_user(addr, &mdq, sizeof(mdq))) + return -EFAULT; + return 0; + } + case Q_V2_GETSTATS: { + struct v2c_dqstats dst; + + v2_get_stats(&dst); + if (copy_to_user(addr, &dst, sizeof(dst))) + return -EFAULT; + return 0; + } + } + BUG(); + return 0; +} +#endif + /* * This is the system call interface. This communicates with * the user-level programs. Currently this only supports diskquota @@ -248,11 +617,26 @@ cmds = cmd >> SUBCMDSHIFT; type = cmd & SUBCMDMASK; +#ifdef CONFIG_QIFACE_COMPAT + if (((cmds != Q_SYNC && cmds != Q_COMP_SYNC) || special) && IS_ERR(sb = resolve_dev(special))) { + ret = PTR_ERR(sb); + sb = NULL; + goto out; + } + if (!(cmds & 0x800000) && cmds != Q_XQUOTAON && cmds != Q_XQUOTAOFF && cmds != Q_XQUOTARM && + cmds != Q_XGETQSTAT && cmds != Q_XGETQUOTA && cmds != Q_XSETQLIM) { + if ((ret = check_compat_quotactl_valid(sb, type, cmds, id)) < 0) + goto out; + ret = do_compat_quotactl(sb, type, cmds, id, addr); + goto out; + } +#else if ((cmds != Q_SYNC || special) && IS_ERR(sb = resolve_dev(special))) { ret = PTR_ERR(sb); sb = NULL; goto out; } +#endif if ((ret = check_quotactl_valid(sb, type, cmds, id)) < 0) goto out; ret = do_quotactl(sb, type, cmds, id, addr); diff -urN -X txt/diff-exclude linux-2.5-linus/include/linux/quotacompat.h linux-2.5/include/linux/quotacompat.h --- linux-2.5-linus/include/linux/quotacompat.h Wed Dec 31 19:00:00 1969 +++ linux-2.5/include/linux/quotacompat.h Sun Mar 3 03:43:44 2002 @@ -0,0 +1,86 @@ +/* + * Definition of symbols used for backward compatible interface + */ + +#ifndef _LINUX_QUOTACOMPAT_ +#define _LINUX_QUOTACOMPAT_ + +#include <linux/types.h> +#include <linux/quota.h> + +struct v1c_mem_dqblk { + __u32 dqb_bhardlimit; /* absolute limit on disk blks alloc */ + __u32 dqb_bsoftlimit; /* preferred limit on disk blks */ + __u32 dqb_curblocks; /* current block count */ + __u32 dqb_ihardlimit; /* maximum # allocated inodes */ + __u32 dqb_isoftlimit; /* preferred inode limit */ + __u32 dqb_curinodes; /* current # allocated inodes */ + time_t dqb_btime; /* time limit for excessive disk use */ + time_t dqb_itime; /* time limit for excessive files */ +}; + +struct v1c_dqstats { + __u32 lookups; + __u32 drops; + __u32 reads; + __u32 writes; + __u32 cache_hits; + __u32 allocated_dquots; + __u32 free_dquots; + __u32 syncs; +}; + +struct v2c_mem_dqblk { + unsigned int dqb_ihardlimit; + unsigned int dqb_isoftlimit; + unsigned int dqb_curinodes; + unsigned int dqb_bhardlimit; + unsigned int dqb_bsoftlimit; + qsize_t dqb_curspace; + __kernel_time_t dqb_btime; + __kernel_time_t dqb_itime; +}; + +struct v2c_mem_dqinfo { + unsigned int dqi_bgrace; + unsigned int dqi_igrace; + unsigned int dqi_flags; + unsigned int dqi_blocks; + unsigned int dqi_free_blk; + unsigned int dqi_free_entry; +}; + +struct v2c_dqstats { + __u32 lookups; + __u32 drops; + __u32 reads; + __u32 writes; + __u32 cache_hits; + __u32 allocated_dquots; + __u32 free_dquots; + __u32 syncs; + __u32 version; +}; + +#define Q_COMP_QUOTAON 0x0100 /* enable quotas */ +#define Q_COMP_QUOTAOFF 0x0200 /* disable quotas */ +#define Q_COMP_SYNC 0x0600 /* sync disk copy of a filesystems quotas */ + +#define Q_V1_GETQUOTA 0x0300 /* get limits and usage */ +#define Q_V1_SETQUOTA 0x0400 /* set limits and usage */ +#define Q_V1_SETUSE 0x0500 /* set usage */ +#define Q_V1_SETQLIM 0x0700 /* set limits */ +#define Q_V1_GETSTATS 0x0800 /* get collected stats */ +#define Q_V1_RSQUASH 0x1000 /* set root_squash option */ + +#define Q_V2_SETQLIM 0x0700 /* set limits */ +#define Q_V2_GETINFO 0x0900 /* get info about quotas - graces, flags... */ +#define Q_V2_SETINFO 0x0A00 /* set info about quotas */ +#define Q_V2_SETGRACE 0x0B00 /* set inode and block grace */ +#define Q_V2_SETFLAGS 0x0C00 /* set flags for quota */ +#define Q_V2_GETQUOTA 0x0D00 /* get limits and usage */ +#define Q_V2_SETQUOTA 0x0E00 /* set limits and usage */ +#define Q_V2_SETUSE 0x0F00 /* set usage */ +#define Q_V2_GETSTATS 0x1100 /* get collected stats */ + +#endif - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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