Commit 2724daf6 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: compress tmp files given extension 



Let's compress tmp files for the given extension list.

This patch does not change the previous behavior, but allow the cases as below.

Extention example: "ext"

- abc.ext : allow
- abc.ext.abc : allow
- abc.extm : not allow

Reviewed-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 6201c478

fs/f2fs/namei.c

+21 −7
Original line number Diff line number Diff line
@@ -23,7 +23,7 @@ 
#include <trace/events/f2fs.h>



static inline bool is_extension_exist(const unsigned char *s, const char *sub,

						bool tmp_ext)

						bool tmp_ext, bool tmp_dot)

{

	size_t slen = strlen(s);

	size_t sublen = strlen(sub);
@@ -49,13 +49,27 @@ static inline bool is_extension_exist(const unsigned char *s, const char *sub, 
	for (i = 1; i < slen - sublen; i++) {

		if (s[i] != '.')

			continue;

		if (!strncasecmp(s + i + 1, sub, sublen))

		if (!strncasecmp(s + i + 1, sub, sublen)) {

			if (!tmp_dot)

				return true;

			if (i == slen - sublen - 1 || s[i + 1 + sublen] == '.')

				return true;

		}

	}



	return false;

}



static inline bool is_temperature_extension(const unsigned char *s, const char *sub)

{

	return is_extension_exist(s, sub, true, false);

}



static inline bool is_compress_extension(const unsigned char *s, const char *sub)

{

	return is_extension_exist(s, sub, true, true);

}



int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,

							bool hot, bool set)

{
@@ -148,7 +162,7 @@ static void set_compress_new_inode(struct f2fs_sb_info *sbi, struct inode *dir, 
	cold_count = le32_to_cpu(sbi->raw_super->extension_count);

	hot_count = sbi->raw_super->hot_ext_count;

	for (i = cold_count; i < cold_count + hot_count; i++)

		if (is_extension_exist(name, extlist[i], false))

		if (is_temperature_extension(name, extlist[i]))

			break;

	f2fs_up_read(&sbi->sb_lock);

	if (i < (cold_count + hot_count))
@@ -156,12 +170,12 @@ static void set_compress_new_inode(struct f2fs_sb_info *sbi, struct inode *dir, 


	/* Don't compress unallowed extension. */

	for (i = 0; i < noext_cnt; i++)

		if (is_extension_exist(name, noext[i], false))

		if (is_compress_extension(name, noext[i]))

			return;



	/* Compress wanting extension. */

	for (i = 0; i < ext_cnt; i++) {

		if (is_extension_exist(name, ext[i], false)) {

		if (is_compress_extension(name, ext[i])) {

			set_compress_context(inode);

			return;

		}
@@ -189,7 +203,7 @@ static void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode, 
	cold_count = le32_to_cpu(sbi->raw_super->extension_count);

	hot_count = sbi->raw_super->hot_ext_count;

	for (i = 0; i < cold_count + hot_count; i++)

		if (is_extension_exist(name, extlist[i], true))

		if (is_temperature_extension(name, extlist[i]))

			break;

	f2fs_up_read(&sbi->sb_lock);