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Message-ID: <CAKYAXd98cgBU_JzL3zx2qT87H-XdqntdKYbCdOsx9gCeDwUO4Q@mail.gmail.com>
Date: Tue, 11 Jun 2013 20:30:17 +0900
From: Namjae Jeon <linkinjeon@...il.com>
To: Changman Lee <cm224.lee@...sung.com>
Cc: jaegeuk.kim@...sung.com, Namjae Jeon <namjae.jeon@...sung.com>,
Pankaj Kumar <pankaj.km@...sung.com>,
linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH 1/4] f2fs: reorganize the f2fs_setattr() function.
2013/6/11, Changman Lee <cm224.lee@...sung.com>:
> On 화, 2013-06-11 at 07:57 +0900, Namjae Jeon wrote:
>> 2013/6/10, Changman Lee <cm224.lee@...sung.com>:
>> > Hello, Namjae
>> Hi. Changman.
>> >
>> > If using ACL, whenever i_mode is changed we should update acl_mode
>> > which
>> > is written to xattr block, too. And vice versa.
>> > Because update_inode() is called at any reason and anytime, so we
>> > should
>> > sync both the moment xattr is written.
>> > We don't hope that only i_mode is written to disk and xattr is not. So
>> > f2fs_setattr is dirty.
>> Yes, agreed this could be issue.
>> >
>> > And, below code has a bug. When error is occurred, inode->i_mode
>> > shouldn't be changed. Please, check one more time, Namjae.
>> And, below code has a bug. When error is occurred, inode->i_mode
>> shouldn't be changed. Please, check one more time, Namjae.
>>
>> This was part of the default code, when ‘acl’ is not set for file’
>> Then, inode should be updated by these conditions (i.e., it covers the
>> ‘chmod’ and ‘setacl’ scenario).
>> When ACL is not present on the file and ‘chmod’ is done, then mode is
>> changed from this part, as f2fs_get_acl() will fail and cause the
>> below code to be executed:
>>
>> if (err || is_inode_flag_set(fi, FI_ACL_MODE)) {
>> inode->i_mode = fi->i_acl_mode;
>> clear_inode_flag(fi, FI_ACL_MODE);
>> }
>>
>> Now, in order to make it consistent and work on all scenario we need
>> to make further change like this in addition to the patch changes.
>> setattr_copy(inode, attr);
>> if (attr->ia_valid & ATTR_MODE) {
>> + set_acl_inode(fi, inode->i_mode);
>> err = f2fs_acl_chmod(inode);
>> if (err || is_inode_flag_set(fi, FI_ACL_MODE)) {
>>
>> Let me know your opinion.
>> Thanks.
>>
>
> setattr_copy changes inode->i_mode, this is not our expectation.
> So I made redundant __setatt_copy that copy attr->mode to
> fi->i_acl_mode.
> When acl_mode is reflected in xattr, acl_mode is copied to
> inode->i_mode.
>
> Agree?
>
Hi Changman.
First, Sorry for interrupt.
I think that inode i_mode should be updated regardless of f2fs_acl_chmod.
Actually I am still not understand the reason why we should use
temporarily acl mode(i_acl_mode).
I wroted the v2 patch to not use i_acl_mode like this.
Am I missing something ?
----------------------------------------------------------------------------------------------------------------
Subject: [PATCH v2] f2fs: reorganize the f2fs_setattr(), f2fs_set_acl,
f2fs_setxattr()
From: Namjae Jeon <namjae.jeon@...sung.com>
Remove the redundant code from f2fs_setattr() function and make it aligned
with usages of generic vfs layer function e.g using the setattr_copy()
instead of using the f2fs specific function.
Also correct the condition for updating the size of file via truncate_setsize().
Also modify the code of f2fs_set_acl and f2fs_setxattr for removing the
redundant code & add the required changes to correct the requested operations.
Remove the variable "i_acl_mode" from the f2fs_inode_info struct since
i_mode will
hold the latest 'mode' value which can be used for any further
references. And in
order to make 'chmod' work without ACL support, inode i_mode should be first
updated correctly.
Remove the helper functions to access and set the i_acl_mode.
Signed-off-by: Namjae Jeon <namjae.jeon@...sung.com>
Signed-off-by: Pankaj Kumar <pankaj.km@...sung.com>
---
fs/f2fs/acl.c | 23 +++++++++--------------
fs/f2fs/f2fs.h | 17 -----------------
fs/f2fs/file.c | 48 ++++++------------------------------------------
fs/f2fs/xattr.c | 9 ++-------
4 files changed, 17 insertions(+), 80 deletions(-)
diff --git a/fs/f2fs/acl.c b/fs/f2fs/acl.c
index 44abc2f..7ebddf1 100644
--- a/fs/f2fs/acl.c
+++ b/fs/f2fs/acl.c
@@ -17,9 +17,6 @@
#include "xattr.h"
#include "acl.h"
-#define get_inode_mode(i) ((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \
- (F2FS_I(i)->i_acl_mode) : ((i)->i_mode))
-
static inline size_t f2fs_acl_size(int count)
{
if (count <= 4) {
@@ -208,7 +205,6 @@ struct posix_acl *f2fs_get_acl(struct inode
*inode, int type)
static int f2fs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
{
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
- struct f2fs_inode_info *fi = F2FS_I(inode);
int name_index;
void *value = NULL;
size_t size = 0;
@@ -226,9 +222,12 @@ static int f2fs_set_acl(struct inode *inode, int
type, struct posix_acl *acl)
error = posix_acl_equiv_mode(acl, &inode->i_mode);
if (error < 0)
return error;
- set_acl_inode(fi, inode->i_mode);
- if (error == 0)
- acl = NULL;
+ else {
+ inode->i_ctime = CURRENT_TIME;
+ mark_inode_dirty(inode);
+ if (error == 0)
+ acl = NULL;
+ }
}
break;
@@ -244,10 +243,8 @@ static int f2fs_set_acl(struct inode *inode, int
type, struct posix_acl *acl)
if (acl) {
value = f2fs_acl_to_disk(acl, &size);
- if (IS_ERR(value)) {
- cond_clear_inode_flag(fi, FI_ACL_MODE);
+ if (IS_ERR(value))
return (int)PTR_ERR(value);
- }
}
error = f2fs_setxattr(inode, name_index, "", value, size);
@@ -256,7 +253,6 @@ static int f2fs_set_acl(struct inode *inode, int
type, struct posix_acl *acl)
if (!error)
set_cached_acl(inode, type, acl);
- cond_clear_inode_flag(fi, FI_ACL_MODE);
return error;
}
@@ -299,18 +295,17 @@ int f2fs_acl_chmod(struct inode *inode)
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
struct posix_acl *acl;
int error;
- umode_t mode = get_inode_mode(inode);
if (!test_opt(sbi, POSIX_ACL))
return 0;
- if (S_ISLNK(mode))
+ if (S_ISLNK(inode->i_mode))
return -EOPNOTSUPP;
acl = f2fs_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl) || !acl)
return PTR_ERR(acl);
- error = posix_acl_chmod(&acl, GFP_KERNEL, mode);
+ error = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
if (error)
return error;
error = f2fs_set_acl(inode, ACL_TYPE_ACCESS, acl);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 40b137a..241ba31 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -159,7 +159,6 @@ struct f2fs_inode_info {
unsigned char i_advise; /* use to give file attribute hints */
unsigned int i_current_depth; /* use only in directory structure */
unsigned int i_pino; /* parent inode number */
- umode_t i_acl_mode; /* keep file acl mode temporarily */
/* Use below internally in f2fs*/
unsigned long flags; /* use to pass per-file flags */
@@ -857,7 +856,6 @@ static inline int f2fs_clear_bit(unsigned int nr,
char *addr)
enum {
FI_NEW_INODE, /* indicate newly allocated inode */
FI_INC_LINK, /* need to increment i_nlink */
- FI_ACL_MODE, /* indicate acl mode */
FI_NO_ALLOC, /* should not allocate any blocks */
FI_DELAY_IPUT, /* used for the recovery */
};
@@ -877,21 +875,6 @@ static inline void clear_inode_flag(struct
f2fs_inode_info *fi, int flag)
clear_bit(flag, &fi->flags);
}
-static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
-{
- fi->i_acl_mode = mode;
- set_inode_flag(fi, FI_ACL_MODE);
-}
-
-static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
-{
- if (is_inode_flag_set(fi, FI_ACL_MODE)) {
- clear_inode_flag(fi, FI_ACL_MODE);
- return 1;
- }
- return 0;
-}
-
static inline int f2fs_readonly(struct super_block *sb)
{
return sb->s_flags & MS_RDONLY;
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index deefd25..4162fbb 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -300,37 +300,6 @@ static int f2fs_getattr(struct vfsmount *mnt,
return 0;
}
-#ifdef CONFIG_F2FS_FS_POSIX_ACL
-static void __setattr_copy(struct inode *inode, const struct iattr *attr)
-{
- struct f2fs_inode_info *fi = F2FS_I(inode);
- unsigned int ia_valid = attr->ia_valid;
-
- if (ia_valid & ATTR_UID)
- inode->i_uid = attr->ia_uid;
- if (ia_valid & ATTR_GID)
- inode->i_gid = attr->ia_gid;
- if (ia_valid & ATTR_ATIME)
- inode->i_atime = timespec_trunc(attr->ia_atime,
- inode->i_sb->s_time_gran);
- if (ia_valid & ATTR_MTIME)
- inode->i_mtime = timespec_trunc(attr->ia_mtime,
- inode->i_sb->s_time_gran);
- if (ia_valid & ATTR_CTIME)
- inode->i_ctime = timespec_trunc(attr->ia_ctime,
- inode->i_sb->s_time_gran);
- if (ia_valid & ATTR_MODE) {
- umode_t mode = attr->ia_mode;
-
- if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
- mode &= ~S_ISGID;
- set_acl_inode(fi, mode);
- }
-}
-#else
-#define __setattr_copy setattr_copy
-#endif
-
int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
{
struct inode *inode = dentry->d_inode;
@@ -341,24 +310,19 @@ int f2fs_setattr(struct dentry *dentry, struct
iattr *attr)
if (err)
return err;
- if ((attr->ia_valid & ATTR_SIZE) &&
- attr->ia_size != i_size_read(inode)) {
- truncate_setsize(inode, attr->ia_size);
+ if ((attr->ia_valid & ATTR_SIZE)) {
+ if (attr->ia_size != i_size_read(inode))
+ truncate_setsize(inode, attr->ia_size);
f2fs_truncate(inode);
f2fs_balance_fs(F2FS_SB(inode->i_sb));
}
- __setattr_copy(inode, attr);
+ setattr_copy(inode, attr);
+ mark_inode_dirty(inode);
- if (attr->ia_valid & ATTR_MODE) {
+ if (attr->ia_valid & ATTR_MODE)
err = f2fs_acl_chmod(inode);
- if (err || is_inode_flag_set(fi, FI_ACL_MODE)) {
- inode->i_mode = fi->i_acl_mode;
- clear_inode_flag(fi, FI_ACL_MODE);
- }
- }
- mark_inode_dirty(inode);
return err;
}
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index 0b02dce..8f02acf 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -333,7 +333,6 @@ int f2fs_setxattr(struct inode *inode, int
name_index, const char *name,
goto exit;
}
set_new_dnode(&dn, inode, NULL, NULL, fi->i_xattr_nid);
- mark_inode_dirty(inode);
page = new_node_page(&dn, XATTR_NODE_OFFSET);
if (IS_ERR(page)) {
@@ -430,12 +429,8 @@ int f2fs_setxattr(struct inode *inode, int
name_index, const char *name,
set_page_dirty(page);
f2fs_put_page(page, 1);
- if (is_inode_flag_set(fi, FI_ACL_MODE)) {
- inode->i_mode = fi->i_acl_mode;
- inode->i_ctime = CURRENT_TIME;
- clear_inode_flag(fi, FI_ACL_MODE);
- }
- update_inode_page(inode);
+ inode->i_ctime = CURRENT_TIME;
+ mark_inode_dirty(inode);
mutex_unlock_op(sbi, ilock);
return 0;
--
1.7.2.3
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