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Date: Mon, 9 Jul 2012 19:28:45 +0400
From: Dmitry Monakhov <dmonakhov@...nvz.org>
To: linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc: jack@...e.cz, Dmitry Monakhov <dmonakhov@...nvz.org>
Subject: [PATCH 3/3] ext4: add subtree quota support
From: Dmitry Monakhov <dmonakhov@...nvz.org>
Both regular and journaled quota are supported.
Signed-off-by: Dmitry Monakhov <dmonakhov@...nvz.org>
---
fs/ext4/ext4.h | 1 +
fs/ext4/super.c | 49 ++++++++++++++++++++++++++++++++++++++++++-------
2 files changed, 43 insertions(+), 7 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index f831210..ff41db8 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -955,6 +955,7 @@ struct ext4_inode_info {
#define EXT4_MOUNT_ERRORS_MASK 0x00070
#define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */
#define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/
+#define EXT4_MOUNT_SBTRQUOTA 0x00200 /* Subtree quota support */
#define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */
#define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */
#define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 3599c95..6f5c1a7 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1128,8 +1128,8 @@ static int bdev_try_to_free_page(struct super_block *sb, struct page *page,
}
#ifdef CONFIG_QUOTA
-#define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group")
-#define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
+static char *quotatypes[] = INITQFNAMES;
+#define QTYPE2NAME(t) (quotatypes[t])
static int ext4_write_dquot(struct dquot *dquot);
static int ext4_acquire_dquot(struct dquot *dquot);
@@ -1229,10 +1229,11 @@ enum {
Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit,
Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
Opt_data_err_abort, Opt_data_err_ignore,
- Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
+ Opt_usrjquota, Opt_grpjquota, Opt_sbtrjquota,
+ Opt_offusrjquota, Opt_offgrpjquota, Opt_offsbtrjquota,
Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota,
Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err,
- Opt_usrquota, Opt_grpquota, Opt_i_version,
+ Opt_usrquota, Opt_grpquota, Opt_sbtrquota, Opt_i_version,
Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit,
Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity,
Opt_inode_readahead_blks, Opt_journal_ioprio,
@@ -1281,10 +1282,13 @@ static const match_table_t tokens = {
{Opt_usrjquota, "usrjquota=%s"},
{Opt_offgrpjquota, "grpjquota="},
{Opt_grpjquota, "grpjquota=%s"},
+ {Opt_offsbtrjquota, "sbtrjquota="},
+ {Opt_sbtrjquota, "sbtrjquota=%s"},
{Opt_jqfmt_vfsold, "jqfmt=vfsold"},
{Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
{Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
{Opt_grpquota, "grpquota"},
+ {Opt_sbtrquota, "sbtrquota"},
{Opt_noquota, "noquota"},
{Opt_quota, "quota"},
{Opt_usrquota, "usrquota"},
@@ -1486,11 +1490,19 @@ static const struct mount_opts {
EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q},
{Opt_usrjquota, 0, MOPT_Q},
{Opt_grpjquota, 0, MOPT_Q},
+ {Opt_sbtrjquota, 0, MOPT_Q},
{Opt_offusrjquota, 0, MOPT_Q},
{Opt_offgrpjquota, 0, MOPT_Q},
+ {Opt_offsbtrjquota, 0, MOPT_Q},
{Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT},
{Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT},
{Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT},
+#ifdef CONFIG_EXT4_SUBTREE
+ {Opt_sbtrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_SBTRQUOTA, (MOPT_SET |
+ MOPT_Q)},
+#else
+ {Opt_sbtrquota, 0, MOPT_NOSUPPORT},
+#endif
{Opt_err, 0, 0}
};
@@ -1513,6 +1525,17 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
return clear_qf_name(sb, USRQUOTA);
else if (token == Opt_offgrpjquota)
return clear_qf_name(sb, GRPQUOTA);
+#ifdef CONFIG_SUBTREE
+ else if (token == Opt_sbtrjquota)
+ return set_qf_name(sb, SBTRQUOTA, &args[0]);
+ else if (token == Opt_offsbtrjquota)
+ return clear_qf_name(sb, SBTRQUOTA);
+#else
+ else if (token == Opt_sbtrjquota || token == Opt_offsbtrjquota) {
+ ext4_msg(sb, KERN_ERR, "subtree quota options not supported");
+ return 0;
+ }
+#endif
#endif
if (args->from && match_int(args, &arg))
return -1;
@@ -1685,13 +1708,17 @@ static int parse_options(char *options, struct super_block *sb,
return 0;
}
#ifdef CONFIG_QUOTA
- if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
+ if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA] ||
+ sbi->s_qf_names[SBTRQUOTA]) {
if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA])
clear_opt(sb, USRQUOTA);
if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA])
clear_opt(sb, GRPQUOTA);
+ if (test_opt(sb, SBTRQUOTA) && sbi->s_qf_names[SBTRQUOTA])
+ clear_opt(sb, SBTRQUOTA);
+
if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) {
ext4_msg(sb, KERN_ERR, "old and new quota "
"format mixing");
@@ -1743,12 +1770,19 @@ static inline void ext4_show_quota_options(struct seq_file *seq,
if (sbi->s_qf_names[GRPQUOTA])
seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]);
-
+#ifdef CONFIG_EXT4_SUBTREE
+ if (sbi->s_qf_names[SBTRQUOTA])
+ seq_printf(seq, ",sbtrjquota=%s", sbi->s_qf_names[SBTRQUOTA]);
+#endif
if (test_opt(sb, USRQUOTA))
seq_puts(seq, ",usrquota");
if (test_opt(sb, GRPQUOTA))
seq_puts(seq, ",grpquota");
+
+ if (test_opt(sb, SBTRQUOTA))
+ seq_puts(seq, ",sbtrquota");
+
#endif
}
@@ -4762,7 +4796,8 @@ static int ext4_mark_dquot_dirty(struct dquot *dquot)
{
/* Are we journaling quotas? */
if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
- EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
+ EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA] ||
+ EXT4_SB(dquot->dq_sb)->s_qf_names[SBTRQUOTA]) {
dquot_mark_dquot_dirty(dquot);
return ext4_write_dquot(dquot);
} else {
--
1.7.1
--
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