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ubifs: introduce UBIFS_ATIME_SUPPORT to ubifs

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To make ubifs support atime flexily, this commit introduces
a Kconfig option named as UBIFS_ATIME_SUPPORT.

With UBIFS_ATIME_SUPPORT=n:
	ubifs keeps the full compatibility to no_atime from
the start of ubifs.

=================UBIFS_ATIME_SUPPORT=n=======================
-o - no atime
-o atime - no atime
-o noatime - no atime
-o relatime - no atime
-o strictatime - no atime
-o lazyatime - no atime

With UBIFS_ATIME_SUPPORT=y:
	ubifs supports the atime same with other main stream
file systems.
=================UBIFS_ATIME_SUPPORT=y=======================
-o - default behavior (relatime currently)
-o atime - atime support
-o noatime - no atime support
-o relatime - relative atime support
-o strictatime - strict atime support
-o lazyatime - lazy atime support

Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Reviewed-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Dongsheng Yang
2015-11-07 12:46:11 +08:00
committed by Richard Weinberger
parent ab92a20bce
commit 8c1c5f2638
5 changed files with 81 additions and 2 deletions
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50
fs/ubifs/file.c
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@@ -1354,6 +1354,47 @@ static inline int mctime_update_needed(const struct inode *inode,
return 0;
}
#ifdef CONFIG_UBIFS_ATIME_SUPPORT
/**
* ubifs_update_time - update time of inode.
* @inode: inode to update
*
* This function updates time of the inode.
*/
int ubifs_update_time(struct inode *inode, struct timespec *time,
int flags)
{
struct ubifs_inode *ui = ubifs_inode(inode);
struct ubifs_info *c = inode->i_sb->s_fs_info;
struct ubifs_budget_req req = { .dirtied_ino = 1,
.dirtied_ino_d = ALIGN(ui->data_len, 8) };
int iflags = I_DIRTY_TIME;
int err, release;
err = ubifs_budget_space(c, &req);
if (err)
return err;
mutex_lock(&ui->ui_mutex);
if (flags & S_ATIME)
inode->i_atime = *time;
if (flags & S_CTIME)
inode->i_ctime = *time;
if (flags & S_MTIME)
inode->i_mtime = *time;
if (!(inode->i_sb->s_flags & MS_LAZYTIME))
iflags |= I_DIRTY_SYNC;
release = ui->dirty;
__mark_inode_dirty(inode, iflags);
mutex_unlock(&ui->ui_mutex);
if (release)
ubifs_release_budget(c, &req);
return 0;
}
#endif
/**
* update_ctime - update mtime and ctime of an inode.
* @inode: inode to update
@@ -1537,6 +1578,9 @@ static int ubifs_file_mmap(struct file *file, struct vm_area_struct *vma)
if (err)
return err;
vma->vm_ops = &ubifs_file_vm_ops;
#ifdef CONFIG_UBIFS_ATIME_SUPPORT
file_accessed(file);
#endif
return 0;
}
@@ -1557,6 +1601,9 @@ const struct inode_operations ubifs_file_inode_operations = {
.getxattr = ubifs_getxattr,
.listxattr = ubifs_listxattr,
.removexattr = ubifs_removexattr,
#ifdef CONFIG_UBIFS_ATIME_SUPPORT
.update_time = ubifs_update_time,
#endif
};
const struct inode_operations ubifs_symlink_inode_operations = {
@@ -1568,6 +1615,9 @@ const struct inode_operations ubifs_symlink_inode_operations = {
.getxattr = ubifs_getxattr,
.listxattr = ubifs_listxattr,
.removexattr = ubifs_removexattr,
#ifdef CONFIG_UBIFS_ATIME_SUPPORT
.update_time = ubifs_update_time,
#endif
};
const struct file_operations ubifs_file_operations = {