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authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-14 18:54:01 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-14 18:54:01 -0700
commit0f0d12728e56c94d3289c6831243b6faeae8a19d (patch)
treebd52fd4ed6fba2a0d8bb95e7fc33f51ac299001d /include/linux/fs.h
parent581bfce969cbfc7ce43ee92273be9cb7c3fdfa61 (diff)
parente462ec50cb5fad19f6003a3d8087f4a0945dd2b1 (diff)
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull mount flag updates from Al Viro: "Another chunk of fmount preparations from dhowells; only trivial conflicts for that part. It separates MS_... bits (very grotty mount(2) ABI) from the struct super_block ->s_flags (kernel-internal, only a small subset of MS_... stuff). This does *not* convert the filesystems to new constants; only the infrastructure is done here. The next step in that series is where the conflicts would be; that's the conversion of filesystems. It's purely mechanical and it's better done after the merge, so if you could run something like list=$(for i in MS_RDONLY MS_NOSUID MS_NODEV MS_NOEXEC MS_SYNCHRONOUS MS_MANDLOCK MS_DIRSYNC MS_NOATIME MS_NODIRATIME MS_SILENT MS_POSIXACL MS_KERNMOUNT MS_I_VERSION MS_LAZYTIME; do git grep -l $i fs drivers/staging/lustre drivers/mtd ipc mm include/linux; done|sort|uniq|grep -v '^fs/namespace.c$') sed -i -e 's/\<MS_RDONLY\>/SB_RDONLY/g' \ -e 's/\<MS_NOSUID\>/SB_NOSUID/g' \ -e 's/\<MS_NODEV\>/SB_NODEV/g' \ -e 's/\<MS_NOEXEC\>/SB_NOEXEC/g' \ -e 's/\<MS_SYNCHRONOUS\>/SB_SYNCHRONOUS/g' \ -e 's/\<MS_MANDLOCK\>/SB_MANDLOCK/g' \ -e 's/\<MS_DIRSYNC\>/SB_DIRSYNC/g' \ -e 's/\<MS_NOATIME\>/SB_NOATIME/g' \ -e 's/\<MS_NODIRATIME\>/SB_NODIRATIME/g' \ -e 's/\<MS_SILENT\>/SB_SILENT/g' \ -e 's/\<MS_POSIXACL\>/SB_POSIXACL/g' \ -e 's/\<MS_KERNMOUNT\>/SB_KERNMOUNT/g' \ -e 's/\<MS_I_VERSION\>/SB_I_VERSION/g' \ -e 's/\<MS_LAZYTIME\>/SB_LAZYTIME/g' \ $list and commit it with something along the lines of 'convert filesystems away from use of MS_... constants' as commit message, it would save a quite a bit of headache next cycle" * 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: VFS: Differentiate mount flags (MS_*) from internal superblock flags VFS: Convert sb->s_flags & MS_RDONLY to sb_rdonly(sb) vfs: Add sb_rdonly(sb) to query the MS_RDONLY flag on s_flags
Diffstat (limited to 'include/linux/fs.h')
-rw-r--r--include/linux/fs.h48
1 files changed, 38 insertions, 10 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 6e187cba94c3..b4ae080f41a6 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1271,6 +1271,33 @@ extern pid_t f_getown(struct file *filp);
extern int send_sigurg(struct fown_struct *fown);
/*
+ * sb->s_flags. Note that these mirror the equivalent MS_* flags where
+ * represented in both.
+ */
+#define SB_RDONLY 1 /* Mount read-only */
+#define SB_NOSUID 2 /* Ignore suid and sgid bits */
+#define SB_NODEV 4 /* Disallow access to device special files */
+#define SB_NOEXEC 8 /* Disallow program execution */
+#define SB_SYNCHRONOUS 16 /* Writes are synced at once */
+#define SB_MANDLOCK 64 /* Allow mandatory locks on an FS */
+#define SB_DIRSYNC 128 /* Directory modifications are synchronous */
+#define SB_NOATIME 1024 /* Do not update access times. */
+#define SB_NODIRATIME 2048 /* Do not update directory access times */
+#define SB_SILENT 32768
+#define SB_POSIXACL (1<<16) /* VFS does not apply the umask */
+#define SB_KERNMOUNT (1<<22) /* this is a kern_mount call */
+#define SB_I_VERSION (1<<23) /* Update inode I_version field */
+#define SB_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */
+
+/* These sb flags are internal to the kernel */
+#define SB_SUBMOUNT (1<<26)
+#define SB_NOREMOTELOCK (1<<27)
+#define SB_NOSEC (1<<28)
+#define SB_BORN (1<<29)
+#define SB_ACTIVE (1<<30)
+#define SB_NOUSER (1<<31)
+
+/*
* Umount options
*/
@@ -1833,7 +1860,7 @@ struct super_operations {
* possible to override it selectively if you really wanted to with some
* ioctl() that is not currently implemented.
*
- * Exception: MS_RDONLY is always applied to the entire file system.
+ * Exception: SB_RDONLY is always applied to the entire file system.
*
* Unfortunately, it is possible to change a filesystems flags with it mounted
* with files in use. This means that all of the inodes will not have their
@@ -1842,19 +1869,20 @@ 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)
-#define IS_SYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS) || \
+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, SB_SYNCHRONOUS) || \
((inode)->i_flags & S_SYNC))
-#define IS_DIRSYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS|MS_DIRSYNC) || \
+#define IS_DIRSYNC(inode) (__IS_FLG(inode, SB_SYNCHRONOUS|SB_DIRSYNC) || \
((inode)->i_flags & (S_SYNC|S_DIRSYNC)))
-#define IS_MANDLOCK(inode) __IS_FLG(inode, MS_MANDLOCK)
-#define IS_NOATIME(inode) __IS_FLG(inode, MS_RDONLY|MS_NOATIME)
-#define IS_I_VERSION(inode) __IS_FLG(inode, MS_I_VERSION)
+#define IS_MANDLOCK(inode) __IS_FLG(inode, SB_MANDLOCK)
+#define IS_NOATIME(inode) __IS_FLG(inode, SB_RDONLY|SB_NOATIME)
+#define IS_I_VERSION(inode) __IS_FLG(inode, SB_I_VERSION)
#define IS_NOQUOTA(inode) ((inode)->i_flags & S_NOQUOTA)
#define IS_APPEND(inode) ((inode)->i_flags & S_APPEND)
#define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE)
-#define IS_POSIXACL(inode) __IS_FLG(inode, MS_POSIXACL)
+#define IS_POSIXACL(inode) __IS_FLG(inode, SB_POSIXACL)
#define IS_DEADDIR(inode) ((inode)->i_flags & S_DEAD)
#define IS_NOCMTIME(inode) ((inode)->i_flags & S_NOCMTIME)
@@ -2175,7 +2203,7 @@ static inline int __mandatory_lock(struct inode *ino)
}
/*
- * ... and these candidates should be on MS_MANDLOCK mounted fs,
+ * ... and these candidates should be on SB_MANDLOCK mounted fs,
* otherwise these will be advisory locks
*/
@@ -3291,7 +3319,7 @@ static inline int check_sticky(struct inode *dir, struct inode *inode)
static inline void inode_has_no_xattr(struct inode *inode)
{
- if (!is_sxid(inode->i_mode) && (inode->i_sb->s_flags & MS_NOSEC))
+ if (!is_sxid(inode->i_mode) && (inode->i_sb->s_flags & SB_NOSEC))
inode->i_flags |= S_NOSEC;
}