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linux: Add move_mount

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It was added on Linux 5.2 (2db154b3ea8e14b04fee23e3fdfd5e9d17fbc6ae)
as way t move a mount from one place to another and, in the next
commit, allow to attach an unattached mount tree.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Adhemerval Zanella
2022-01-31 10:04:57 -03:00
parent b4deb7beb8
commit 5b41b2659d
38 changed files with 59 additions and 5 deletions
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17
sysdeps/unix/sysv/linux/sys/mount.h
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@@ -154,6 +154,16 @@ enum
#define MOUNT_ATTR_NOSYMFOLLOW 0x00200000 /* Do not follow symlinks. */
/* move_mount flags. */
#define MOVE_MOUNT_F_SYMLINKS 0x00000001 /* Follow symlinks on from path */
#define MOVE_MOUNT_F_AUTOMOUNTS 0x00000002 /* Follow automounts on from path */
#define MOVE_MOUNT_F_EMPTY_PATH 0x00000004 /* Empty from path permitted */
#define MOVE_MOUNT_T_SYMLINKS 0x00000010 /* Follow symlinks on to path */
#define MOVE_MOUNT_T_AUTOMOUNTS 0x00000020 /* Follow automounts on to path */
#define MOVE_MOUNT_T_EMPTY_PATH 0x00000040 /* Empty to path permitted */
#define MOVE_MOUNT_SET_GROUP 0x00000100 /* Set sharing group instead */
__BEGIN_DECLS
/* Mount a filesystem. */
@@ -176,6 +186,13 @@ extern int fsopen (const char *__fs_name, unsigned int __flags) __THROW;
extern int fsmount (int __fd, unsigned int __flags,
unsigned int __ms_flags) __THROW;
/* Add the mounted FROM_DFD referenced by FROM_PATHNAME filesystem returned
by fsmount in the hierarchy in the place TO_DFD reference by TO_PATHNAME
using FLAGS. */
extern int move_mount (int __from_dfd, const char *__from_pathname,
int __to_dfd, const char *__to_pathname,
unsigned int flags) __THROW;
__END_DECLS
#endif /* _SYS_MOUNT_H */