f2fs: compress tmp files given extension

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

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/namei.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
  

On 2023/6/7 4:36, Jaegeuk Kim wrote:
> Let's compress tmp files for the given extension list.

Could you please check below commit? IIRC, it was introduce to avoid compressing
file which has unpredictable tmp file, e.g. foo.sox.

Could you please describe the case you encounter?

commit 4a67d9b07ac8dce7f1034e0d887f2f4ee00fe118
Author: Chao Yu <chao@kernel.org>
Date:   Tue May 18 17:54:58 2021 +0800

     f2fs: compress: fix to disallow temp extension

     This patch restricts to configure compress extension as format of:

      [filename + '.' + extension]

     rather than:

      [filename + '.' + extension + (optional: '.' + temp extension)]

     in order to avoid to enable compression incorrectly:

     1. compress_extension=so
     2. touch file.soa
     3. touch file.so.tmp

Thanks,

> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> ---
>   fs/f2fs/namei.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
> index 3e35eb7dbb8f..cdc94c8e60f7 100644
> --- a/fs/f2fs/namei.c
> +++ b/fs/f2fs/namei.c
> @@ -161,7 +161,7 @@ static void set_compress_new_inode(struct f2fs_sb_info *sbi, struct inode *dir,
>   
>   	/* Compress wanting extension. */
>   	for (i = 0; i < ext_cnt; i++) {
> -		if (is_extension_exist(name, ext[i], false)) {
> +		if (is_extension_exist(name, ext[i], true)) {
>   			set_compress_context(inode);
>   			return;
>   		}
  

On 06/12, Chao Yu wrote:
> On 2023/6/7 4:36, Jaegeuk Kim wrote:
> > Let's compress tmp files for the given extension list.
> 
> Could you please check below commit? IIRC, it was introduce to avoid compressing
> file which has unpredictable tmp file, e.g. foo.sox.
> 
> Could you please describe the case you encounter?

I don't know what I need to describe more tho, looking at how to compress
abc.so.tmp and abc.so, given compress_extension=so.

So, your concern is somehow abc.soa? If so, we need to fix is_extension_exist.
Will check what's going on here.

> 
> commit 4a67d9b07ac8dce7f1034e0d887f2f4ee00fe118
> Author: Chao Yu <chao@kernel.org>
> Date:   Tue May 18 17:54:58 2021 +0800
> 
>     f2fs: compress: fix to disallow temp extension
> 
>     This patch restricts to configure compress extension as format of:
> 
>      [filename + '.' + extension]
> 
>     rather than:
> 
>      [filename + '.' + extension + (optional: '.' + temp extension)]
> 
>     in order to avoid to enable compression incorrectly:
> 
>     1. compress_extension=so
>     2. touch file.soa
>     3. touch file.so.tmp
> 
> Thanks,
> 
> > 
> > Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> > ---
> >   fs/f2fs/namei.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
> > index 3e35eb7dbb8f..cdc94c8e60f7 100644
> > --- a/fs/f2fs/namei.c
> > +++ b/fs/f2fs/namei.c
> > @@ -161,7 +161,7 @@ static void set_compress_new_inode(struct f2fs_sb_info *sbi, struct inode *dir,
> >   	/* Compress wanting extension. */
> >   	for (i = 0; i < ext_cnt; i++) {
> > -		if (is_extension_exist(name, ext[i], false)) {
> > +		if (is_extension_exist(name, ext[i], true)) {
> >   			set_compress_context(inode);
> >   			return;
> >   		}
  

On 2023/6/12 23:36, Jaegeuk Kim wrote:
> On 06/12, Chao Yu wrote:
>> On 2023/6/7 4:36, Jaegeuk Kim wrote:
>>> Let's compress tmp files for the given extension list.
>>
>> Could you please check below commit? IIRC, it was introduce to avoid compressing
>> file which has unpredictable tmp file, e.g. foo.sox.
>>
>> Could you please describe the case you encounter?
> 
> I don't know what I need to describe more tho, looking at how to compress

Oh, I just like to know which case you want to cover: foo.so.tmp or foo.sotmp.

> abc.so.tmp and abc.so, given compress_extension=so.

Copied.

> 
> So, your concern is somehow abc.soa? If so, we need to fix is_extension_exist.

Yes, is_extension_exist(, true) accepts optional '.' while parsing file extension.

[filename + '.' + extension + (optional: '.' + temp extension)]

It is used to support parsing common prefix for cold file's extension, we can add
a parameter for is_extension_exist() to disable prefix parsing for compress file
extension?

const char *media_ext_lists[] = {
	/* common prefix */
	"mp", // Covers mp3, mp4, mpeg, mpg
	"wm", // Covers wma, wmb, wmv
	"og", // Covers oga, ogg, ogm, ogv
	"jp", // Covers jpg, jpeg, jp2
...
}

Thanks,

> Will check what's going on here.
> 
>>
>> commit 4a67d9b07ac8dce7f1034e0d887f2f4ee00fe118
>> Author: Chao Yu <chao@kernel.org>
>> Date:   Tue May 18 17:54:58 2021 +0800
>>
>>      f2fs: compress: fix to disallow temp extension
>>
>>      This patch restricts to configure compress extension as format of:
>>
>>       [filename + '.' + extension]
>>
>>      rather than:
>>
>>       [filename + '.' + extension + (optional: '.' + temp extension)]
>>
>>      in order to avoid to enable compression incorrectly:
>>
>>      1. compress_extension=so
>>      2. touch file.soa
>>      3. touch file.so.tmp
>>
>> Thanks,
>>
>>>
>>> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
>>> ---
>>>    fs/f2fs/namei.c | 2 +-
>>>    1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
>>> index 3e35eb7dbb8f..cdc94c8e60f7 100644
>>> --- a/fs/f2fs/namei.c
>>> +++ b/fs/f2fs/namei.c
>>> @@ -161,7 +161,7 @@ static void set_compress_new_inode(struct f2fs_sb_info *sbi, struct inode *dir,
>>>    	/* Compress wanting extension. */
>>>    	for (i = 0; i < ext_cnt; i++) {
>>> -		if (is_extension_exist(name, ext[i], false)) {
>>> +		if (is_extension_exist(name, ext[i], true)) {
>>>    			set_compress_context(inode);
>>>    			return;
>>>    		}
  

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

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

 Change log from v1:
  - refactor to allow abc.ext.dontcare only

 fs/f2fs/namei.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 3e35eb7dbb8f..49573ef4115d 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -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);
@@ -49,8 +49,12 @@ 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))
-			return true;
+		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;
@@ -148,7 +152,7 @@ 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_extension_exist(name, extlist[i], false, false))
 			break;
 	f2fs_up_read(&sbi->sb_lock);
 	if (i < (cold_count + hot_count))
@@ -156,12 +160,12 @@ 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_extension_exist(name, noext[i], false, false))
 			return;
 
 	/* Compress wanting extension. */
 	for (i = 0; i < ext_cnt; i++) {
-		if (is_extension_exist(name, ext[i], false)) {
+		if (is_extension_exist(name, ext[i], true, true)) {
 			set_compress_context(inode);
 			return;
 		}
@@ -189,7 +193,7 @@ 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_extension_exist(name, extlist[i], true, false))
 			break;
 	f2fs_up_read(&sbi->sb_lock);
  

On 2023/6/14 6:14, Jaegeuk Kim wrote:
> 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
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> ---
> 
>   Change log from v1:
>    - refactor to allow abc.ext.dontcare only
> 
>   fs/f2fs/namei.c | 18 +++++++++++-------
>   1 file changed, 11 insertions(+), 7 deletions(-)
> 
> diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
> index 3e35eb7dbb8f..49573ef4115d 100644
> --- a/fs/f2fs/namei.c
> +++ b/fs/f2fs/namei.c
> @@ -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);
> @@ -49,8 +49,12 @@ 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))
> -			return true;
> +		if (!strncasecmp(s + i + 1, sub, sublen)) {
> +			if (!tmp_dot)
> +				return true;
> +			if (i == slen - sublen - 1 || s[i + 1 + sublen] == '.')

Do you mean?

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

> +				return true;
> +		}
>   	}
>   
>   	return false;
> @@ -148,7 +152,7 @@ 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_extension_exist(name, extlist[i], false, false))

Parameters should be consistent w/ the one in set_file_temperature()?

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

>   			break;
>   	f2fs_up_read(&sbi->sb_lock);
>   	if (i < (cold_count + hot_count))
> @@ -156,12 +160,12 @@ 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_extension_exist(name, noext[i], false, false))

is_extension_exist(name, noext[i], true, true) ?

Thanks,

>   			return;
>   
>   	/* Compress wanting extension. */
>   	for (i = 0; i < ext_cnt; i++) {
> -		if (is_extension_exist(name, ext[i], false)) {
> +		if (is_extension_exist(name, ext[i], true, true)) {
>   			set_compress_context(inode);
>   			return;
>   		}
> @@ -189,7 +193,7 @@ 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_extension_exist(name, extlist[i], true, false))
>   			break;
>   	f2fs_up_read(&sbi->sb_lock);
>
  

On 06/20, Chao Yu wrote:
> On 2023/6/14 6:14, Jaegeuk Kim wrote:
> > 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
> > 
> > Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> > ---
> > 
> >   Change log from v1:
> >    - refactor to allow abc.ext.dontcare only
> > 
> >   fs/f2fs/namei.c | 18 +++++++++++-------
> >   1 file changed, 11 insertions(+), 7 deletions(-)
> > 
> > diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
> > index 3e35eb7dbb8f..49573ef4115d 100644
> > --- a/fs/f2fs/namei.c
> > +++ b/fs/f2fs/namei.c
> > @@ -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);
> > @@ -49,8 +49,12 @@ 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))
> > -			return true;
> > +		if (!strncasecmp(s + i + 1, sub, sublen)) {
> > +			if (!tmp_dot)
> > +				return true;
> > +			if (i == slen - sublen - 1 || s[i + 1 + sublen] == '.')
> 
> Do you mean?
> 
> if (i == slen - sublen - 1 && s[i + 1 + sublen] == '.')

I don't think so.

> 
> > +				return true;
> > +		}
> >   	}
> >   	return false;
> > @@ -148,7 +152,7 @@ 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_extension_exist(name, extlist[i], false, false))
> 
> Parameters should be consistent w/ the one in set_file_temperature()?
> 
> if (is_extension_exist(name, extlist[i], true, false))
> 
> >   			break;
> >   	f2fs_up_read(&sbi->sb_lock);
> >   	if (i < (cold_count + hot_count))
> > @@ -156,12 +160,12 @@ 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_extension_exist(name, noext[i], false, false))
> 
> is_extension_exist(name, noext[i], true, true) ?
> 
> Thanks,
> 
> >   			return;
> >   	/* Compress wanting extension. */
> >   	for (i = 0; i < ext_cnt; i++) {
> > -		if (is_extension_exist(name, ext[i], false)) {
> > +		if (is_extension_exist(name, ext[i], true, true)) {
> >   			set_compress_context(inode);
> >   			return;
> >   		}
> > @@ -189,7 +193,7 @@ 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_extension_exist(name, extlist[i], true, false))
> >   			break;
> >   	f2fs_up_read(&sbi->sb_lock);
  

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

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
  Change log from v2:
   - fix parameters

  Change log from v1:
   - refactor to allow abc.ext.dontcare only

 fs/f2fs/namei.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 3e35eb7dbb8f..80806ce1289f 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -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);
@@ -49,8 +49,12 @@ 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))
-			return true;
+		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;
@@ -148,7 +152,7 @@ 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_extension_exist(name, extlist[i], true, false))
 			break;
 	f2fs_up_read(&sbi->sb_lock);
 	if (i < (cold_count + hot_count))
@@ -156,12 +160,12 @@ 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_extension_exist(name, noext[i], true, false))
 			return;
 
 	/* Compress wanting extension. */
 	for (i = 0; i < ext_cnt; i++) {
-		if (is_extension_exist(name, ext[i], false)) {
+		if (is_extension_exist(name, ext[i], true, true)) {
 			set_compress_context(inode);
 			return;
 		}
@@ -189,7 +193,7 @@ 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_extension_exist(name, extlist[i], true, false))
 			break;
 	f2fs_up_read(&sbi->sb_lock);
  

On 2023/6/22 15:12, Jaegeuk Kim wrote:
> 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
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> ---
>    Change log from v2:
>     - fix parameters
> 
>    Change log from v1:
>     - refactor to allow abc.ext.dontcare only
> 
>   fs/f2fs/namei.c | 18 +++++++++++-------
>   1 file changed, 11 insertions(+), 7 deletions(-)
> 
> diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
> index 3e35eb7dbb8f..80806ce1289f 100644
> --- a/fs/f2fs/namei.c
> +++ b/fs/f2fs/namei.c
> @@ -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);
> @@ -49,8 +49,12 @@ 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))
> -			return true;
> +		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;
> @@ -148,7 +152,7 @@ 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_extension_exist(name, extlist[i], true, false))
>   			break;
>   	f2fs_up_read(&sbi->sb_lock);
>   	if (i < (cold_count + hot_count))
> @@ -156,12 +160,12 @@ 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_extension_exist(name, noext[i], true, false))

is_extension_exist(name, ext[i], true, true) ?

Thanks,

>   			return;
>   
>   	/* Compress wanting extension. */
>   	for (i = 0; i < ext_cnt; i++) {
> -		if (is_extension_exist(name, ext[i], false)) {
> +		if (is_extension_exist(name, ext[i], true, true)) {
>   			set_compress_context(inode);
>   			return;
>   		}
> @@ -189,7 +193,7 @@ 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_extension_exist(name, extlist[i], true, false))
>   			break;
>   	f2fs_up_read(&sbi->sb_lock);
>
  

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

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
   Change log from v3:
    - split temparature and compress extensions

   Change log from v2:
    - fix parameters
 
   Change log from v1:
    - refactor to allow abc.ext.dontcare only

 fs/f2fs/namei.c | 28 +++++++++++++++++++++-------
 1 file changed, 21 insertions(+), 7 deletions(-)

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 3e35eb7dbb8f..ff89de115272 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -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))
-			return true;
+		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);
  

On 2023/6/24 3:15, Jaegeuk Kim wrote:
> 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
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Reviewed-by: Chao Yu <chao@kernel.org>

Thanks,