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817e9b4d9e
Sparse lead me to the dev_map_desc one and Al Viro lead me to the bufmap one. Signed-off-by: Mike Marshall <hubcap@omnibond.com>
362 lines
11 KiB
C
362 lines
11 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/spinlock_types.h>
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#include <linux/slab.h>
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#include <linux/ioctl.h>
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/* khandle stuff ***********************************************************/
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/*
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* The 2.9 core will put 64 bit handles in here like this:
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* 1234 0000 0000 5678
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* The 3.0 and beyond cores will put 128 bit handles in here like this:
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* 1234 5678 90AB CDEF
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* The kernel module will always use the first four bytes and
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* the last four bytes as an inum.
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*/
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struct orangefs_khandle {
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unsigned char u[16];
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} __aligned(8);
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/*
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* kernel version of an object ref.
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*/
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struct orangefs_object_kref {
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struct orangefs_khandle khandle;
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__s32 fs_id;
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__s32 __pad1;
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};
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/*
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* compare 2 khandles assumes little endian thus from large address to
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* small address
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*/
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static inline int ORANGEFS_khandle_cmp(const struct orangefs_khandle *kh1,
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const struct orangefs_khandle *kh2)
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{
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int i;
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for (i = 15; i >= 0; i--) {
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if (kh1->u[i] > kh2->u[i])
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return 1;
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if (kh1->u[i] < kh2->u[i])
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return -1;
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}
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return 0;
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}
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static inline void ORANGEFS_khandle_to(const struct orangefs_khandle *kh,
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void *p, int size)
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{
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memcpy(p, kh->u, 16);
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memset(p + 16, 0, size - 16);
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}
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static inline void ORANGEFS_khandle_from(struct orangefs_khandle *kh,
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void *p, int size)
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{
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memset(kh, 0, 16);
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memcpy(kh->u, p, 16);
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}
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/* pvfs2-types.h ************************************************************/
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#define ORANGEFS_SUPER_MAGIC 0x20030528
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/*
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* ORANGEFS error codes are a signed 32-bit integer. Error codes are negative, but
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* the sign is stripped before decoding.
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*/
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/* Bit 31 is not used since it is the sign. */
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/*
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* Bit 30 specifies that this is a ORANGEFS error. A ORANGEFS error is either an
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* encoded errno value or a ORANGEFS protocol error.
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*/
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#define ORANGEFS_ERROR_BIT (1 << 30)
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/*
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* Bit 29 specifies that this is a ORANGEFS protocol error and not an encoded
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* errno value.
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*/
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#define ORANGEFS_NON_ERRNO_ERROR_BIT (1 << 29)
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/*
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* Bits 9, 8, and 7 specify the error class, which encodes the section of
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* server code the error originated in for logging purposes. It is not used
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* in the kernel except to be masked out.
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*/
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#define ORANGEFS_ERROR_CLASS_BITS 0x380
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/* Bits 6 - 0 are reserved for the actual error code. */
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#define ORANGEFS_ERROR_NUMBER_BITS 0x7f
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/* Encoded errno values decoded by PINT_errno_mapping in orangefs-utils.c. */
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/* Our own ORANGEFS protocol error codes. */
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#define ORANGEFS_ECANCEL (1|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
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#define ORANGEFS_EDEVINIT (2|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
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#define ORANGEFS_EDETAIL (3|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
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#define ORANGEFS_EHOSTNTFD (4|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
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#define ORANGEFS_EADDRNTFD (5|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
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#define ORANGEFS_ENORECVR (6|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
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#define ORANGEFS_ETRYAGAIN (7|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
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#define ORANGEFS_ENOTPVFS (8|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
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#define ORANGEFS_ESECURITY (9|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
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/* permission bits */
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#define ORANGEFS_O_EXECUTE (1 << 0)
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#define ORANGEFS_O_WRITE (1 << 1)
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#define ORANGEFS_O_READ (1 << 2)
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#define ORANGEFS_G_EXECUTE (1 << 3)
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#define ORANGEFS_G_WRITE (1 << 4)
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#define ORANGEFS_G_READ (1 << 5)
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#define ORANGEFS_U_EXECUTE (1 << 6)
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#define ORANGEFS_U_WRITE (1 << 7)
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#define ORANGEFS_U_READ (1 << 8)
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/* no ORANGEFS_U_VTX (sticky bit) */
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#define ORANGEFS_G_SGID (1 << 10)
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#define ORANGEFS_U_SUID (1 << 11)
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#define ORANGEFS_ITERATE_START 2147483646
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#define ORANGEFS_ITERATE_END 2147483645
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#define ORANGEFS_IMMUTABLE_FL FS_IMMUTABLE_FL
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#define ORANGEFS_APPEND_FL FS_APPEND_FL
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#define ORANGEFS_NOATIME_FL FS_NOATIME_FL
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#define ORANGEFS_MIRROR_FL 0x01000000ULL
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#define ORANGEFS_FS_ID_NULL ((__s32)0)
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#define ORANGEFS_ATTR_SYS_UID (1 << 0)
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#define ORANGEFS_ATTR_SYS_GID (1 << 1)
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#define ORANGEFS_ATTR_SYS_PERM (1 << 2)
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#define ORANGEFS_ATTR_SYS_ATIME (1 << 3)
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#define ORANGEFS_ATTR_SYS_CTIME (1 << 4)
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#define ORANGEFS_ATTR_SYS_MTIME (1 << 5)
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#define ORANGEFS_ATTR_SYS_TYPE (1 << 6)
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#define ORANGEFS_ATTR_SYS_ATIME_SET (1 << 7)
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#define ORANGEFS_ATTR_SYS_MTIME_SET (1 << 8)
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#define ORANGEFS_ATTR_SYS_SIZE (1 << 20)
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#define ORANGEFS_ATTR_SYS_LNK_TARGET (1 << 24)
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#define ORANGEFS_ATTR_SYS_DFILE_COUNT (1 << 25)
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#define ORANGEFS_ATTR_SYS_DIRENT_COUNT (1 << 26)
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#define ORANGEFS_ATTR_SYS_BLKSIZE (1 << 28)
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#define ORANGEFS_ATTR_SYS_MIRROR_COPIES_COUNT (1 << 29)
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#define ORANGEFS_ATTR_SYS_COMMON_ALL \
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(ORANGEFS_ATTR_SYS_UID | \
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ORANGEFS_ATTR_SYS_GID | \
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ORANGEFS_ATTR_SYS_PERM | \
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ORANGEFS_ATTR_SYS_ATIME | \
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ORANGEFS_ATTR_SYS_CTIME | \
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ORANGEFS_ATTR_SYS_MTIME | \
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ORANGEFS_ATTR_SYS_TYPE)
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#define ORANGEFS_ATTR_SYS_ALL_SETABLE \
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(ORANGEFS_ATTR_SYS_COMMON_ALL-ORANGEFS_ATTR_SYS_TYPE)
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#define ORANGEFS_ATTR_SYS_ALL_NOHINT \
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(ORANGEFS_ATTR_SYS_COMMON_ALL | \
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ORANGEFS_ATTR_SYS_SIZE | \
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ORANGEFS_ATTR_SYS_LNK_TARGET | \
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ORANGEFS_ATTR_SYS_DFILE_COUNT | \
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ORANGEFS_ATTR_SYS_MIRROR_COPIES_COUNT | \
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ORANGEFS_ATTR_SYS_DIRENT_COUNT | \
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ORANGEFS_ATTR_SYS_BLKSIZE)
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#define ORANGEFS_XATTR_REPLACE 0x2
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#define ORANGEFS_XATTR_CREATE 0x1
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#define ORANGEFS_MAX_SERVER_ADDR_LEN 256
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#define ORANGEFS_NAME_MAX 256
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/*
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* max extended attribute name len as imposed by the VFS and exploited for the
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* upcall request types.
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* NOTE: Please retain them as multiples of 8 even if you wish to change them
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* This is *NECESSARY* for supporting 32 bit user-space binaries on a 64-bit
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* kernel. Due to implementation within DBPF, this really needs to be
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* ORANGEFS_NAME_MAX, which it was the same value as, but no reason to let it
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* break if that changes in the future.
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*/
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#define ORANGEFS_MAX_XATTR_NAMELEN ORANGEFS_NAME_MAX /* Not the same as
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* XATTR_NAME_MAX defined
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* by <linux/xattr.h>
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*/
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#define ORANGEFS_MAX_XATTR_VALUELEN 8192 /* Not the same as XATTR_SIZE_MAX
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* defined by <linux/xattr.h>
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*/
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#define ORANGEFS_MAX_XATTR_LISTLEN 16 /* Not the same as XATTR_LIST_MAX
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* defined by <linux/xattr.h>
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*/
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/*
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* ORANGEFS I/O operation types, used in both system and server interfaces.
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*/
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enum ORANGEFS_io_type {
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ORANGEFS_IO_READ = 1,
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ORANGEFS_IO_WRITE = 2
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};
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/*
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* If this enum is modified the server parameters related to the precreate pool
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* batch and low threshold sizes may need to be modified to reflect this
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* change.
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*/
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enum orangefs_ds_type {
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ORANGEFS_TYPE_NONE = 0,
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ORANGEFS_TYPE_METAFILE = (1 << 0),
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ORANGEFS_TYPE_DATAFILE = (1 << 1),
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ORANGEFS_TYPE_DIRECTORY = (1 << 2),
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ORANGEFS_TYPE_SYMLINK = (1 << 3),
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ORANGEFS_TYPE_DIRDATA = (1 << 4),
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ORANGEFS_TYPE_INTERNAL = (1 << 5) /* for the server's private use */
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};
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/* This structure is used by the VFS-client interaction alone */
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struct ORANGEFS_keyval_pair {
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char key[ORANGEFS_MAX_XATTR_NAMELEN];
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__s32 key_sz; /* __s32 for portable, fixed-size structures */
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__s32 val_sz;
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char val[ORANGEFS_MAX_XATTR_VALUELEN];
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};
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/* pvfs2-sysint.h ***********************************************************/
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/* Describes attributes for a file, directory, or symlink. */
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struct ORANGEFS_sys_attr_s {
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__u32 owner;
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__u32 group;
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__u32 perms;
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__u64 atime;
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__u64 mtime;
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__u64 ctime;
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__s64 size;
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/* NOTE: caller must free if valid */
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char *link_target;
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/* Changed to __s32 so that size of structure does not change */
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__s32 dfile_count;
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/* Changed to __s32 so that size of structure does not change */
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__s32 distr_dir_servers_initial;
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/* Changed to __s32 so that size of structure does not change */
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__s32 distr_dir_servers_max;
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/* Changed to __s32 so that size of structure does not change */
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__s32 distr_dir_split_size;
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__u32 mirror_copies_count;
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/* NOTE: caller must free if valid */
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char *dist_name;
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/* NOTE: caller must free if valid */
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char *dist_params;
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__s64 dirent_count;
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enum orangefs_ds_type objtype;
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__u64 flags;
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__u32 mask;
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__s64 blksize;
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};
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#define ORANGEFS_LOOKUP_LINK_NO_FOLLOW 0
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/* pint-dev.h ***************************************************************/
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/* parameter structure used in ORANGEFS_DEV_DEBUG ioctl command */
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struct dev_mask_info_s {
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enum {
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KERNEL_MASK,
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CLIENT_MASK,
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} mask_type;
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__u64 mask_value;
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};
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struct dev_mask2_info_s {
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__u64 mask1_value;
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__u64 mask2_value;
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};
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/* pvfs2-util.h *************************************************************/
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__s32 ORANGEFS_util_translate_mode(int mode);
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/* pvfs2-debug.h ************************************************************/
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#include "orangefs-debug.h"
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/* pvfs2-internal.h *********************************************************/
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#define llu(x) (unsigned long long)(x)
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#define lld(x) (long long)(x)
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/* pint-dev-shared.h ********************************************************/
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#define ORANGEFS_DEV_MAGIC 'k'
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#define ORANGEFS_READDIR_DEFAULT_DESC_COUNT 5
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#define DEV_GET_MAGIC 0x1
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#define DEV_GET_MAX_UPSIZE 0x2
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#define DEV_GET_MAX_DOWNSIZE 0x3
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#define DEV_MAP 0x4
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#define DEV_REMOUNT_ALL 0x5
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#define DEV_DEBUG 0x6
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#define DEV_UPSTREAM 0x7
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#define DEV_CLIENT_MASK 0x8
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#define DEV_CLIENT_STRING 0x9
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#define DEV_MAX_NR 0xa
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/* supported ioctls, codes are with respect to user-space */
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enum {
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ORANGEFS_DEV_GET_MAGIC = _IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAGIC, __s32),
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ORANGEFS_DEV_GET_MAX_UPSIZE =
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_IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAX_UPSIZE, __s32),
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ORANGEFS_DEV_GET_MAX_DOWNSIZE =
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_IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAX_DOWNSIZE, __s32),
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ORANGEFS_DEV_MAP = _IO(ORANGEFS_DEV_MAGIC, DEV_MAP),
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ORANGEFS_DEV_REMOUNT_ALL = _IO(ORANGEFS_DEV_MAGIC, DEV_REMOUNT_ALL),
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ORANGEFS_DEV_DEBUG = _IOR(ORANGEFS_DEV_MAGIC, DEV_DEBUG, __s32),
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ORANGEFS_DEV_UPSTREAM = _IOW(ORANGEFS_DEV_MAGIC, DEV_UPSTREAM, int),
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ORANGEFS_DEV_CLIENT_MASK = _IOW(ORANGEFS_DEV_MAGIC,
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DEV_CLIENT_MASK,
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struct dev_mask2_info_s),
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ORANGEFS_DEV_CLIENT_STRING = _IOW(ORANGEFS_DEV_MAGIC,
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DEV_CLIENT_STRING,
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char *),
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ORANGEFS_DEV_MAXNR = DEV_MAX_NR,
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};
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/*
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* version number for use in communicating between kernel space and user
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* space. Zero signifies the upstream version of the kernel module.
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*/
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#define ORANGEFS_KERNEL_PROTO_VERSION 0
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#define ORANGEFS_MINIMUM_USERSPACE_VERSION 20903
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/*
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* describes memory regions to map in the ORANGEFS_DEV_MAP ioctl.
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* NOTE: See devorangefs-req.c for 32 bit compat structure.
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* Since this structure has a variable-sized layout that is different
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* on 32 and 64 bit platforms, we need to normalize to a 64 bit layout
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* on such systems before servicing ioctl calls from user-space binaries
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* that may be 32 bit!
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*/
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struct ORANGEFS_dev_map_desc {
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void __user *ptr;
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__s32 total_size;
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__s32 size;
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__s32 count;
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};
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/* gossip.h *****************************************************************/
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extern __u64 orangefs_gossip_debug_mask;
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/* try to avoid function call overhead by checking masks in macro */
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#define gossip_debug(mask, fmt, ...) \
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do { \
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if (orangefs_gossip_debug_mask & (mask)) \
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printk(KERN_DEBUG fmt, ##__VA_ARGS__); \
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} while (0)
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#define gossip_err pr_err
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