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authorDongsheng Yang <yangds.fnst@cn.fujitsu.com>2015-11-07 12:46:11 +0800
committerRichard Weinberger <richard@nod.at>2015-11-07 11:35:08 +0100
commit8c1c5f263833ec2dc8fd716cf4281265c485d7ad (patch)
treeeb2192812a04954d607b587bd563afe8812103c5 /fs/ubifs/file.c
parentab92a20bce3b4c21927cc1ae514c482f50ad3487 (diff)
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ubifs: introduce UBIFS_ATIME_SUPPORT to ubifs
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>
Diffstat (limited to 'fs/ubifs/file.c')
-rw-r--r--fs/ubifs/file.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index a3dfe2ae79f2..0edc12856147 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -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 = {