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| author | Chao Yu <yuchao0@huawei.com> | 2018-02-26 17:04:13 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-03-13 02:05:48 +0300 |
| commit | 846ae671ad368e344a2b141c0f19e1014b27a0dd (patch) | |
| tree | b220f05ab079e37343b841d368a58916388149ab /fs/f2fs/sysfs.c | |
| parent | 17cd07ae95073c298af92c1ba14ac58ce84de33b (diff) | |
| download | linux-846ae671ad368e344a2b141c0f19e1014b27a0dd.tar.xz | |
f2fs: expose extension_list sysfs entry
This patch adds a sysfs entry 'extension_list' to support
query/add/del item in extension list.
Query:
cat /sys/fs/f2fs/<device>/extension_list
Add:
echo 'extension' > /sys/fs/f2fs/<device>/extension_list
Del:
echo '!extension' > /sys/fs/f2fs/<device>/extension_list
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/sysfs.c')
| -rw-r--r-- | fs/f2fs/sysfs.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index 374ee5c82f94..d27b28e602a6 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -136,6 +136,18 @@ static ssize_t f2fs_sbi_show(struct f2fs_attr *a, if (!ptr) return -EINVAL; + if (!strcmp(a->attr.name, "extension_list")) { + __u8 (*extlist)[F2FS_EXTENSION_LEN] = + sbi->raw_super->extension_list; + int count = le32_to_cpu(sbi->raw_super->extension_count); + int len = 0, i; + + for (i = 0; i < count; i++) + len += snprintf(buf + len, PAGE_SIZE - len, "%s\n", + extlist[i]); + return len; + } + ui = (unsigned int *)(ptr + a->offset); return snprintf(buf, PAGE_SIZE, "%u\n", *ui); @@ -154,6 +166,32 @@ static ssize_t f2fs_sbi_store(struct f2fs_attr *a, if (!ptr) return -EINVAL; + if (!strcmp(a->attr.name, "extension_list")) { + const char *name = strim((char *)buf); + bool set = true; + + if (name[0] == '!') { + name++; + set = false; + } + + if (strlen(name) >= F2FS_EXTENSION_LEN) + return -EINVAL; + + down_write(&sbi->sb_lock); + + ret = update_extension_list(sbi, name, set); + if (ret) + goto out; + + ret = f2fs_commit_super(sbi, false); + if (ret) + update_extension_list(sbi, name, !set); +out: + up_write(&sbi->sb_lock); + return ret ? ret : count; + } + ui = (unsigned int *)(ptr + a->offset); ret = kstrtoul(skip_spaces(buf), 0, &t); @@ -307,6 +345,7 @@ F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold); +F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list); #ifdef CONFIG_F2FS_FAULT_INJECTION F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate); F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type); @@ -357,6 +396,7 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(iostat_enable), ATTR_LIST(readdir_ra), ATTR_LIST(gc_pin_file_thresh), + ATTR_LIST(extension_list), #ifdef CONFIG_F2FS_FAULT_INJECTION ATTR_LIST(inject_rate), ATTR_LIST(inject_type), |