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vfs: Add sb_rdonly(sb) to query the MS_RDONLY flag on s_flags 

Add an sb_rdonly() function to query the MS_RDONLY flag on sb->s_flags
preparatory to providing an SB_RDONLY flag.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2017-07-17 08:45:34 +01:00
parent 87b2c3fc63
commit 94e92e7ac9
1 changed files with 2 additions and 1 deletions
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3
include/linux/fs.h
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@ -1844,7 +1844,8 @@ struct super_operations {
*/
#define __IS_FLG(inode, flg) ((inode)->i_sb->s_flags & (flg))
#define IS_RDONLY(inode) ((inode)->i_sb->s_flags & MS_RDONLY)
static inline bool sb_rdonly(const struct super_block *sb) { return sb->s_flags & MS_RDONLY; }
#define IS_RDONLY(inode) sb_rdonly((inode)->i_sb)
#define IS_SYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS) || \
((inode)->i_flags & S_SYNC))
#define IS_DIRSYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS|MS_DIRSYNC) || \