1 #ifndef _UAPI_LINUX_MOUNT_H 1 #ifndef _UAPI_LINUX_MOUNT_H
2 #define _UAPI_LINUX_MOUNT_H 2 #define _UAPI_LINUX_MOUNT_H
3 3
4 #include <linux/types.h> 4 #include <linux/types.h>
5 5
6 /* 6 /*
7 * These are the fs-independent mount-flags: u 7 * These are the fs-independent mount-flags: up to 32 flags are supported
8 * 8 *
9 * Usage of these is restricted within the ker 9 * Usage of these is restricted within the kernel to core mount(2) code and
10 * callers of sys_mount() only. Filesystems s 10 * callers of sys_mount() only. Filesystems should be using the SB_*
11 * equivalent instead. 11 * equivalent instead.
12 */ 12 */
13 #define MS_RDONLY 1 /* Mount read- 13 #define MS_RDONLY 1 /* Mount read-only */
14 #define MS_NOSUID 2 /* Ignore suid 14 #define MS_NOSUID 2 /* Ignore suid and sgid bits */
15 #define MS_NODEV 4 /* Disallow ac 15 #define MS_NODEV 4 /* Disallow access to device special files */
16 #define MS_NOEXEC 8 /* Disallow pr 16 #define MS_NOEXEC 8 /* Disallow program execution */
17 #define MS_SYNCHRONOUS 16 /* Writes are 17 #define MS_SYNCHRONOUS 16 /* Writes are synced at once */
18 #define MS_REMOUNT 32 /* Alter flags 18 #define MS_REMOUNT 32 /* Alter flags of a mounted FS */
19 #define MS_MANDLOCK 64 /* Allow manda 19 #define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
20 #define MS_DIRSYNC 128 /* Directory m 20 #define MS_DIRSYNC 128 /* Directory modifications are synchronous */
21 #define MS_NOSYMFOLLOW 256 /* Do not foll 21 #define MS_NOSYMFOLLOW 256 /* Do not follow symlinks */
22 #define MS_NOATIME 1024 /* Do not upda 22 #define MS_NOATIME 1024 /* Do not update access times. */
23 #define MS_NODIRATIME 2048 /* Do not upda 23 #define MS_NODIRATIME 2048 /* Do not update directory access times */
24 #define MS_BIND 4096 24 #define MS_BIND 4096
25 #define MS_MOVE 8192 25 #define MS_MOVE 8192
26 #define MS_REC 16384 26 #define MS_REC 16384
27 #define MS_VERBOSE 32768 /* War is peac 27 #define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
28 MS_VERBOSE 28 MS_VERBOSE is deprecated. */
29 #define MS_SILENT 32768 29 #define MS_SILENT 32768
30 #define MS_POSIXACL (1<<16) /* VFS does no 30 #define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
31 #define MS_UNBINDABLE (1<<17) /* change to u 31 #define MS_UNBINDABLE (1<<17) /* change to unbindable */
32 #define MS_PRIVATE (1<<18) /* change to p 32 #define MS_PRIVATE (1<<18) /* change to private */
33 #define MS_SLAVE (1<<19) /* change to s 33 #define MS_SLAVE (1<<19) /* change to slave */
34 #define MS_SHARED (1<<20) /* change to s 34 #define MS_SHARED (1<<20) /* change to shared */
35 #define MS_RELATIME (1<<21) /* Update atim 35 #define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */
36 #define MS_KERNMOUNT (1<<22) /* this is a k 36 #define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
37 #define MS_I_VERSION (1<<23) /* Update inod 37 #define MS_I_VERSION (1<<23) /* Update inode I_version field */
38 #define MS_STRICTATIME (1<<24) /* Always perf 38 #define MS_STRICTATIME (1<<24) /* Always perform atime updates */
39 #define MS_LAZYTIME (1<<25) /* Update the 39 #define MS_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */
40 40
41 /* These sb flags are internal to the kernel * 41 /* These sb flags are internal to the kernel */
42 #define MS_SUBMOUNT (1<<26) 42 #define MS_SUBMOUNT (1<<26)
43 #define MS_NOREMOTELOCK (1<<27) 43 #define MS_NOREMOTELOCK (1<<27)
44 #define MS_NOSEC (1<<28) 44 #define MS_NOSEC (1<<28)
45 #define MS_BORN (1<<29) 45 #define MS_BORN (1<<29)
46 #define MS_ACTIVE (1<<30) 46 #define MS_ACTIVE (1<<30)
47 #define MS_NOUSER (1<<31) 47 #define MS_NOUSER (1<<31)
48 48
49 /* 49 /*
50 * Superblock flags that can be altered by MS_ 50 * Superblock flags that can be altered by MS_REMOUNT
51 */ 51 */
52 #define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRON 52 #define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION|\
53 MS_LAZYTIME) 53 MS_LAZYTIME)
54 54
55 /* 55 /*
56 * Old magic mount flag and mask 56 * Old magic mount flag and mask
57 */ 57 */
58 #define MS_MGC_VAL 0xC0ED0000 58 #define MS_MGC_VAL 0xC0ED0000
59 #define MS_MGC_MSK 0xffff0000 59 #define MS_MGC_MSK 0xffff0000
60 60
61 /* 61 /*
62 * open_tree() flags. 62 * open_tree() flags.
63 */ 63 */
64 #define OPEN_TREE_CLONE 1 64 #define OPEN_TREE_CLONE 1 /* Clone the target tree and attach the clone */
65 #define OPEN_TREE_CLOEXEC O_CLOEXEC 65 #define OPEN_TREE_CLOEXEC O_CLOEXEC /* Close the file on execve() */
66 66
67 /* 67 /*
68 * move_mount() flags. 68 * move_mount() flags.
69 */ 69 */
70 #define MOVE_MOUNT_F_SYMLINKS 0x0000 70 #define MOVE_MOUNT_F_SYMLINKS 0x00000001 /* Follow symlinks on from path */
71 #define MOVE_MOUNT_F_AUTOMOUNTS 0x0000 71 #define MOVE_MOUNT_F_AUTOMOUNTS 0x00000002 /* Follow automounts on from path */
72 #define MOVE_MOUNT_F_EMPTY_PATH 0x0000 72 #define MOVE_MOUNT_F_EMPTY_PATH 0x00000004 /* Empty from path permitted */
73 #define MOVE_MOUNT_T_SYMLINKS 0x0000 73 #define MOVE_MOUNT_T_SYMLINKS 0x00000010 /* Follow symlinks on to path */
74 #define MOVE_MOUNT_T_AUTOMOUNTS 0x0000 74 #define MOVE_MOUNT_T_AUTOMOUNTS 0x00000020 /* Follow automounts on to path */
75 #define MOVE_MOUNT_T_EMPTY_PATH 0x0000 75 #define MOVE_MOUNT_T_EMPTY_PATH 0x00000040 /* Empty to path permitted */
76 #define MOVE_MOUNT_SET_GROUP 0x0000 76 #define MOVE_MOUNT_SET_GROUP 0x00000100 /* Set sharing group instead */
77 #define MOVE_MOUNT_BENEATH 0x0000 77 #define MOVE_MOUNT_BENEATH 0x00000200 /* Mount beneath top mount */
78 #define MOVE_MOUNT__MASK 0x0000 78 #define MOVE_MOUNT__MASK 0x00000377
79 79
80 /* 80 /*
81 * fsopen() flags. 81 * fsopen() flags.
82 */ 82 */
83 #define FSOPEN_CLOEXEC 0x00000001 83 #define FSOPEN_CLOEXEC 0x00000001
84 84
85 /* 85 /*
86 * fspick() flags. 86 * fspick() flags.
87 */ 87 */
88 #define FSPICK_CLOEXEC 0x00000001 88 #define FSPICK_CLOEXEC 0x00000001
89 #define FSPICK_SYMLINK_NOFOLLOW 0x00000002 89 #define FSPICK_SYMLINK_NOFOLLOW 0x00000002
90 #define FSPICK_NO_AUTOMOUNT 0x00000004 90 #define FSPICK_NO_AUTOMOUNT 0x00000004
91 #define FSPICK_EMPTY_PATH 0x00000008 91 #define FSPICK_EMPTY_PATH 0x00000008
92 92
93 /* 93 /*
94 * The type of fsconfig() call made. 94 * The type of fsconfig() call made.
95 */ 95 */
96 enum fsconfig_command { 96 enum fsconfig_command {
97 FSCONFIG_SET_FLAG = 0, /* Set 97 FSCONFIG_SET_FLAG = 0, /* Set parameter, supplying no value */
98 FSCONFIG_SET_STRING = 1, /* Set 98 FSCONFIG_SET_STRING = 1, /* Set parameter, supplying a string value */
99 FSCONFIG_SET_BINARY = 2, /* Set 99 FSCONFIG_SET_BINARY = 2, /* Set parameter, supplying a binary blob value */
100 FSCONFIG_SET_PATH = 3, /* Set 100 FSCONFIG_SET_PATH = 3, /* Set parameter, supplying an object by path */
101 FSCONFIG_SET_PATH_EMPTY = 4, /* Set 101 FSCONFIG_SET_PATH_EMPTY = 4, /* Set parameter, supplying an object by (empty) path */
102 FSCONFIG_SET_FD = 5, /* Set 102 FSCONFIG_SET_FD = 5, /* Set parameter, supplying an object by fd */
103 FSCONFIG_CMD_CREATE = 6, /* Cre 103 FSCONFIG_CMD_CREATE = 6, /* Create new or reuse existing superblock */
104 FSCONFIG_CMD_RECONFIGURE = 7, /* Inv 104 FSCONFIG_CMD_RECONFIGURE = 7, /* Invoke superblock reconfiguration */
105 FSCONFIG_CMD_CREATE_EXCL = 8, /* Cre 105 FSCONFIG_CMD_CREATE_EXCL = 8, /* Create new superblock, fail if reusing existing superblock */
106 }; 106 };
107 107
108 /* 108 /*
109 * fsmount() flags. 109 * fsmount() flags.
110 */ 110 */
111 #define FSMOUNT_CLOEXEC 0x00000001 111 #define FSMOUNT_CLOEXEC 0x00000001
112 112
113 /* 113 /*
114 * Mount attributes. 114 * Mount attributes.
115 */ 115 */
116 #define MOUNT_ATTR_RDONLY 0x00000001 /* 116 #define MOUNT_ATTR_RDONLY 0x00000001 /* Mount read-only */
117 #define MOUNT_ATTR_NOSUID 0x00000002 /* 117 #define MOUNT_ATTR_NOSUID 0x00000002 /* Ignore suid and sgid bits */
118 #define MOUNT_ATTR_NODEV 0x00000004 /* 118 #define MOUNT_ATTR_NODEV 0x00000004 /* Disallow access to device special files */
119 #define MOUNT_ATTR_NOEXEC 0x00000008 /* 119 #define MOUNT_ATTR_NOEXEC 0x00000008 /* Disallow program execution */
120 #define MOUNT_ATTR__ATIME 0x00000070 /* 120 #define MOUNT_ATTR__ATIME 0x00000070 /* Setting on how atime should be updated */
121 #define MOUNT_ATTR_RELATIME 0x00000000 /* 121 #define MOUNT_ATTR_RELATIME 0x00000000 /* - Update atime relative to mtime/ctime. */
122 #define MOUNT_ATTR_NOATIME 0x00000010 /* 122 #define MOUNT_ATTR_NOATIME 0x00000010 /* - Do not update access times. */
123 #define MOUNT_ATTR_STRICTATIME 0x00000020 /* 123 #define MOUNT_ATTR_STRICTATIME 0x00000020 /* - Always perform atime updates */
124 #define MOUNT_ATTR_NODIRATIME 0x00000080 /* 124 #define MOUNT_ATTR_NODIRATIME 0x00000080 /* Do not update directory access times */
125 #define MOUNT_ATTR_IDMAP 0x00100000 /* 125 #define MOUNT_ATTR_IDMAP 0x00100000 /* Idmap mount to @userns_fd in struct mount_attr. */
126 #define MOUNT_ATTR_NOSYMFOLLOW 0x00200000 /* 126 #define MOUNT_ATTR_NOSYMFOLLOW 0x00200000 /* Do not follow symlinks */
127 127
128 /* 128 /*
129 * mount_setattr() 129 * mount_setattr()
130 */ 130 */
131 struct mount_attr { 131 struct mount_attr {
132 __u64 attr_set; 132 __u64 attr_set;
133 __u64 attr_clr; 133 __u64 attr_clr;
134 __u64 propagation; 134 __u64 propagation;
135 __u64 userns_fd; 135 __u64 userns_fd;
136 }; 136 };
137 137
138 /* List of all mount_attr versions. */ 138 /* List of all mount_attr versions. */
139 #define MOUNT_ATTR_SIZE_VER0 32 /* sizeof f 139 #define MOUNT_ATTR_SIZE_VER0 32 /* sizeof first published struct */
140 140
141 141
142 /* 142 /*
143 * Structure for getting mount/superblock/file 143 * Structure for getting mount/superblock/filesystem info with statmount(2).
144 * 144 *
145 * The interface is similar to statx(2): indiv 145 * The interface is similar to statx(2): individual fields or groups can be
146 * selected with the @mask argument of statmou 146 * selected with the @mask argument of statmount(). Kernel will set the @mask
147 * field according to the supported fields. 147 * field according to the supported fields.
148 * 148 *
149 * If string fields are selected, then the cal 149 * If string fields are selected, then the caller needs to pass a buffer that
150 * has space after the fixed part of the struc 150 * has space after the fixed part of the structure. Nul terminated strings are
151 * copied there and offsets relative to @str a 151 * copied there and offsets relative to @str are stored in the relevant fields.
152 * If the buffer is too small, then EOVERFLOW 152 * If the buffer is too small, then EOVERFLOW is returned. The actually used
153 * size is returned in @size. 153 * size is returned in @size.
154 */ 154 */
155 struct statmount { 155 struct statmount {
156 __u32 size; /* Total size, 156 __u32 size; /* Total size, including strings */
157 __u32 mnt_opts; /* [str] Mount !! 157 __u32 __spare1;
158 __u64 mask; /* What result 158 __u64 mask; /* What results were written */
159 __u32 sb_dev_major; /* Device ID * 159 __u32 sb_dev_major; /* Device ID */
160 __u32 sb_dev_minor; 160 __u32 sb_dev_minor;
161 __u64 sb_magic; /* ..._SUPER_M 161 __u64 sb_magic; /* ..._SUPER_MAGIC */
162 __u32 sb_flags; /* SB_{RDONLY, 162 __u32 sb_flags; /* SB_{RDONLY,SYNCHRONOUS,DIRSYNC,LAZYTIME} */
163 __u32 fs_type; /* [str] Files 163 __u32 fs_type; /* [str] Filesystem type */
164 __u64 mnt_id; /* Unique ID o 164 __u64 mnt_id; /* Unique ID of mount */
165 __u64 mnt_parent_id; /* Unique ID o 165 __u64 mnt_parent_id; /* Unique ID of parent (for root == mnt_id) */
166 __u32 mnt_id_old; /* Reused IDs 166 __u32 mnt_id_old; /* Reused IDs used in proc/.../mountinfo */
167 __u32 mnt_parent_id_old; 167 __u32 mnt_parent_id_old;
168 __u64 mnt_attr; /* MOUNT_ATTR_ 168 __u64 mnt_attr; /* MOUNT_ATTR_... */
169 __u64 mnt_propagation; /* MS_{SHARED, 169 __u64 mnt_propagation; /* MS_{SHARED,SLAVE,PRIVATE,UNBINDABLE} */
170 __u64 mnt_peer_group; /* ID of share 170 __u64 mnt_peer_group; /* ID of shared peer group */
171 __u64 mnt_master; /* Mount recei 171 __u64 mnt_master; /* Mount receives propagation from this ID */
172 __u64 propagate_from; /* Propagation 172 __u64 propagate_from; /* Propagation from in current namespace */
173 __u32 mnt_root; /* [str] Root 173 __u32 mnt_root; /* [str] Root of mount relative to root of fs */
174 __u32 mnt_point; /* [str] Mount 174 __u32 mnt_point; /* [str] Mountpoint relative to current root */
175 __u64 mnt_ns_id; /* ID of the m !! 175 __u64 __spare2[50];
176 __u64 __spare2[49]; <<
177 char str[]; /* Variable si 176 char str[]; /* Variable size part containing strings */
178 }; 177 };
179 178
180 /* 179 /*
181 * Structure for passing mount ID and miscella 180 * Structure for passing mount ID and miscellaneous parameters to statmount(2)
182 * and listmount(2). 181 * and listmount(2).
183 * 182 *
184 * For statmount(2) @param represents the requ 183 * For statmount(2) @param represents the request mask.
185 * For listmount(2) @param represents the last 184 * For listmount(2) @param represents the last listed mount id (or zero).
186 */ 185 */
187 struct mnt_id_req { 186 struct mnt_id_req {
188 __u32 size; 187 __u32 size;
189 __u32 spare; 188 __u32 spare;
190 __u64 mnt_id; 189 __u64 mnt_id;
191 __u64 param; 190 __u64 param;
192 __u64 mnt_ns_id; <<
193 }; 191 };
194 192
195 /* List of all mnt_id_req versions. */ 193 /* List of all mnt_id_req versions. */
196 #define MNT_ID_REQ_SIZE_VER0 24 /* sizeof f 194 #define MNT_ID_REQ_SIZE_VER0 24 /* sizeof first published struct */
197 #define MNT_ID_REQ_SIZE_VER1 32 /* sizeof s <<
198 195
199 /* 196 /*
200 * @mask bits for statmount(2) 197 * @mask bits for statmount(2)
201 */ 198 */
202 #define STATMOUNT_SB_BASIC 0x0000 199 #define STATMOUNT_SB_BASIC 0x00000001U /* Want/got sb_... */
203 #define STATMOUNT_MNT_BASIC 0x0000 200 #define STATMOUNT_MNT_BASIC 0x00000002U /* Want/got mnt_... */
204 #define STATMOUNT_PROPAGATE_FROM 0x0000 201 #define STATMOUNT_PROPAGATE_FROM 0x00000004U /* Want/got propagate_from */
205 #define STATMOUNT_MNT_ROOT 0x0000 202 #define STATMOUNT_MNT_ROOT 0x00000008U /* Want/got mnt_root */
206 #define STATMOUNT_MNT_POINT 0x0000 203 #define STATMOUNT_MNT_POINT 0x00000010U /* Want/got mnt_point */
207 #define STATMOUNT_FS_TYPE 0x0000 204 #define STATMOUNT_FS_TYPE 0x00000020U /* Want/got fs_type */
208 #define STATMOUNT_MNT_NS_ID 0x0000 <<
209 #define STATMOUNT_MNT_OPTS 0x0000 <<
210 205
211 /* 206 /*
212 * Special @mnt_id values that can be passed t 207 * Special @mnt_id values that can be passed to listmount
213 */ 208 */
214 #define LSMT_ROOT 0xffffffffffff 209 #define LSMT_ROOT 0xffffffffffffffff /* root mount */
215 #define LISTMOUNT_REVERSE (1 << 0) /* Li <<
216 210
217 #endif /* _UAPI_LINUX_MOUNT_H */ 211 #endif /* _UAPI_LINUX_MOUNT_H */
218 212
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