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nilfs2: issue discard request after cleaning segments

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This adds a function to send discard requests for given array of
segment numbers, and calls the function when garbage collection
succeeded.

Signed-off-by: Jiro SEKIBA <jir@unicus.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
This commit is contained in:
Jiro SEKIBA
2010-01-30 18:06:35 +09:00
committed by Ryusuke Konishi
parent 724e6d3fe8
commit e902ec9906
6 changed files with 60 additions and 1 deletions
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8
fs/nilfs2/super.c
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@@ -481,6 +481,8 @@ static int nilfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
seq_printf(seq, ",order=strict");
if (nilfs_test_opt(sbi, NORECOVERY))
seq_printf(seq, ",norecovery");
if (nilfs_test_opt(sbi, DISCARD))
seq_printf(seq, ",discard");
return 0;
}
@@ -550,7 +552,7 @@ static const struct export_operations nilfs_export_ops = {
enum {
Opt_err_cont, Opt_err_panic, Opt_err_ro,
Opt_nobarrier, Opt_snapshot, Opt_order, Opt_norecovery,
Opt_err,
Opt_discard, Opt_err,
};
static match_table_t tokens = {
@@ -561,6 +563,7 @@ static match_table_t tokens = {
{Opt_snapshot, "cp=%u"},
{Opt_order, "order=%s"},
{Opt_norecovery, "norecovery"},
{Opt_discard, "discard"},
{Opt_err, NULL}
};
@@ -614,6 +617,9 @@ static int parse_options(char *options, struct super_block *sb)
case Opt_norecovery:
nilfs_set_opt(sbi, NORECOVERY);
break;
case Opt_discard:
nilfs_set_opt(sbi, DISCARD);
break;
default:
printk(KERN_ERR
"NILFS: Unrecognized mount option \"%s\"\n", p);