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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2022-06-24 16:59:15 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2022-07-05 10:08:48 -0300
commit7eae6a91e9b1670330c9f15730082c91c0b1d570 (patch)
tree30dd281514d4db8ff1a64c288ec99d374bf4f0f1 /sysdeps/unix/sysv/linux/sys/mount.h
parent05844d18f7893bf96965f163c428214fd5ebe10a (diff)
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linux: Add fsconfig
It was added on Linux 5.2 (ecdab150fddb42fe6a739335257949220033b782)
as a way to a configure filesystem creation context and trigger
actions upon it, to be used in conjunction with fsopen, fspick and
fsmount.

The fsconfig_command commands are currently only defined as an enum,
so they can't be checked on tst-mount-consts.py with current test
support.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'sysdeps/unix/sysv/linux/sys/mount.h')
-rw-r--r--sysdeps/unix/sysv/linux/sys/mount.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sys/mount.h b/sysdeps/unix/sysv/linux/sys/mount.h
index 50ec65c7a3..ef2c72f31c 100644
--- a/sysdeps/unix/sysv/linux/sys/mount.h
+++ b/sysdeps/unix/sysv/linux/sys/mount.h
@@ -163,6 +163,27 @@ enum
 #define MOVE_MOUNT_T_EMPTY_PATH 0x00000040 /* Empty to path permitted */
 #define MOVE_MOUNT_SET_GROUP    0x00000100 /* Set sharing group instead */
 
+/* The type of fsconfig call made.   */
+enum fsconfig_command
+{
+  FSCONFIG_SET_FLAG       = 0,    /* Set parameter, supplying no value */
+#define FSCONFIG_SET_FLAG FSCONFIG_SET_FLAG
+  FSCONFIG_SET_STRING     = 1,    /* Set parameter, supplying a string value */
+#define FSCONFIG_SET_STRING FSCONFIG_SET_STRING
+  FSCONFIG_SET_BINARY     = 2,    /* Set parameter, supplying a binary blob value */
+#define FSCONFIG_SET_BINARY FSCONFIG_SET_BINARY
+  FSCONFIG_SET_PATH       = 3,    /* Set parameter, supplying an object by path */
+#define FSCONFIG_SET_PATH FSCONFIG_SET_PATH
+  FSCONFIG_SET_PATH_EMPTY = 4,    /* Set parameter, supplying an object by (empty) path */
+#define FSCONFIG_SET_PATH_EMPTY FSCONFIG_SET_PATH_EMPTY
+  FSCONFIG_SET_FD         = 5,    /* Set parameter, supplying an object by fd */
+#define FSCONFIG_SET_FD FSCONFIG_SET_FD
+  FSCONFIG_CMD_CREATE     = 6,    /* Invoke superblock creation */
+#define FSCONFIG_CMD_CREATE FSCONFIG_CMD_CREATE
+  FSCONFIG_CMD_RECONFIGURE = 7,   /* Invoke superblock reconfiguration */
+#define FSCONFIG_CMD_RECONFIGURE FSCONFIG_CMD_RECONFIGURE
+};
+
 
 __BEGIN_DECLS
 
@@ -193,6 +214,11 @@ extern int move_mount (int __from_dfd, const char *__from_pathname,
 		       int __to_dfd, const char *__to_pathname,
 		       unsigned int flags) __THROW;
 
+/* Set parameters and trigger CMD action on the FD context.  KEY, VALUE,
+   and AUX are used depending ng of the CMD.  */
+extern int fsconfig (int __fd, unsigned int __cmd, const char *__key,
+		     const void *__value, int __aux) __THROW;
+
 __END_DECLS
 
 #endif /* _SYS_MOUNT_H */