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f2fs: add nodiscard mount option 

This patch adds 'nodiscard' mount option.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
steinar/wifi_calib_4_9_kernel
Chao Yu 2016-07-03 22:05:14 +08:00 committed by Jaegeuk Kim
parent 72e1c797b5
commit 64058be9c8
2 changed files with 7 additions and 1 deletions
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4
Documentation/filesystems/f2fs.txt
View File

@ -109,7 +109,9 @@ background_gc=%s Turn on/off cleaning operations, namely garbage
disable_roll_forward Disable the roll-forward recovery routine disable_roll_forward Disable the roll-forward recovery routine
norecovery Disable the roll-forward recovery routine, mounted read- norecovery Disable the roll-forward recovery routine, mounted read-
only (i.e., -o ro,disable_roll_forward) only (i.e., -o ro,disable_roll_forward)
discard Issue discard/TRIM commands when a segment is cleaned. discard/nodiscard Enable/disable real-time discard in f2fs, if discard is
enabled, f2fs will issue discard/TRIM commands when a
segment is cleaned.
no_heap Disable heap-style segment allocation which finds free no_heap Disable heap-style segment allocation which finds free
segments for data from the beginning of main area, while segments for data from the beginning of main area, while
for node from the end of main area. for node from the end of main area.

4
fs/f2fs/super.c
View File

@ -76,6 +76,7 @@ enum {
Opt_disable_roll_forward, Opt_disable_roll_forward,
Opt_norecovery, Opt_norecovery,
Opt_discard, Opt_discard,
Opt_nodiscard,
Opt_noheap, Opt_noheap,
Opt_user_xattr, Opt_user_xattr,
Opt_nouser_xattr, Opt_nouser_xattr,
@ -106,6 +107,7 @@ static match_table_t f2fs_tokens = {
{Opt_disable_roll_forward, "disable_roll_forward"}, {Opt_disable_roll_forward, "disable_roll_forward"},
{Opt_norecovery, "norecovery"}, {Opt_norecovery, "norecovery"},
{Opt_discard, "discard"}, {Opt_discard, "discard"},
{Opt_nodiscard, "nodiscard"},
{Opt_noheap, "no_heap"}, {Opt_noheap, "no_heap"},
{Opt_user_xattr, "user_xattr"}, {Opt_user_xattr, "user_xattr"},
{Opt_nouser_xattr, "nouser_xattr"}, {Opt_nouser_xattr, "nouser_xattr"},
@ -426,6 +428,8 @@ static int parse_options(struct super_block *sb, char *options)
"the device does not support discard"); "the device does not support discard");
} }
break; break;
case Opt_nodiscard:
clear_opt(sbi, DISCARD);
case Opt_noheap: case Opt_noheap:
set_opt(sbi, NOHEAP); set_opt(sbi, NOHEAP);
break; break;