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Add zfs_file_* interface, remove vnodes

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Provide a common zfs_file_* interface which can be implemented on all 
platforms to perform normal file access from either the kernel module
or the libzpool library.

This allows all non-portable vnode_t usage in the common code to be 
replaced by the new portable zfs_file_t.  The associated vnode and
kobj compatibility functions, types, and macros have been removed
from the SPL.  Moving forward, vnodes should only be used in platform
specific code when provided by the native operating system.

Reviewed-by: Sean Eric Fagan <sef@ixsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Igor Kozhukhov <igor@dilos.org>
Reviewed-by: Jorgen Lundman <lundman@lundman.net>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #9556
This commit is contained in:
Matthew Macy
2019-11-21 09:32:57 -08:00
committed by Brian Behlendorf
parent 67a6c3bc9f
commit da92d5cbb3
53 changed files with 1169 additions and 1554 deletions
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include/os/linux/spl/sys/vnode.h
-95
View File
@@ -51,23 +51,8 @@
#define O_DSYNC O_SYNC
#endif
#define FREAD 1
#define FWRITE 2
#define FCREAT O_CREAT
#define FTRUNC O_TRUNC
#define FOFFMAX O_LARGEFILE
#define FSYNC O_SYNC
#define FDSYNC O_DSYNC
#define FEXCL O_EXCL
#define FDIRECT O_DIRECT
#define FAPPEND O_APPEND
#define FNODSYNC 0x10000 /* fsync pseudo flag */
#define FNOFOLLOW 0x20000 /* don't follow symlinks */
#define F_FREESP 11 /* Free file space */
/*
* The vnode AT_ flags are mapped to the Linux ATTR_* flags.
* This allows them to be used safely with an iattr structure.
@@ -102,23 +87,7 @@
#define CREATE_XATTR_DIR 0x04
#define ATTR_NOACLCHECK 0x20
typedef enum vtype {
VNON = 0,
VREG = 1,
VDIR = 2,
VBLK = 3,
VCHR = 4,
VLNK = 5,
VFIFO = 6,
VDOOR = 7,
VPROC = 8,
VSOCK = 9,
VPORT = 10,
VBAD = 11
} vtype_t;
typedef struct vattr {
enum vtype va_type; /* vnode type */
uint32_t va_mask; /* attribute bit-mask */
ushort_t va_mode; /* acc mode */
uid_t va_uid; /* owner uid */
@@ -133,70 +102,6 @@ typedef struct vattr {
dev_t va_rdev; /* dev */
uint64_t va_nblocks; /* space used */
uint32_t va_blksize; /* block size */
uint32_t va_seq; /* sequence */
struct dentry *va_dentry; /* dentry to wire */
} vattr_t;
typedef struct vnode {
struct file *v_file;
kmutex_t v_lock; /* protects vnode fields */
uint_t v_flag; /* vnode flags (see below) */
uint_t v_count; /* reference count */
void *v_data; /* private data for fs */
struct vfs *v_vfsp; /* ptr to containing VFS */
struct stdata *v_stream; /* associated stream */
enum vtype v_type; /* vnode type */
dev_t v_rdev; /* device (VCHR, VBLK) */
gfp_t v_gfp_mask; /* original mapping gfp mask */
} vnode_t;
typedef struct vn_file {
int f_fd; /* linux fd for lookup */
struct task_struct *f_task; /* linux task this fd belongs to */
struct file *f_file; /* linux file struct */
atomic_t f_ref; /* ref count */
kmutex_t f_lock; /* struct lock */
loff_t f_offset; /* offset */
vnode_t *f_vnode; /* vnode */
struct list_head f_list; /* list referenced file_t's */
} file_t;
extern vnode_t *vn_alloc(int flag);
void vn_free(vnode_t *vp);
extern vtype_t vn_mode_to_vtype(mode_t);
extern mode_t vn_vtype_to_mode(vtype_t);
extern int vn_open(const char *path, uio_seg_t seg, int flags, int mode,
vnode_t **vpp, int x1, void *x2);
extern int vn_openat(const char *path, uio_seg_t seg, int flags, int mode,
vnode_t **vpp, int x1, void *x2, vnode_t *vp, int fd);
extern int vn_rdwr(uio_rw_t uio, vnode_t *vp, void *addr, ssize_t len,
offset_t off, uio_seg_t seg, int x1, rlim64_t x2,
void *x3, ssize_t *residp);
extern int vn_close(vnode_t *vp, int flags, int x1, int x2, void *x3, void *x4);
extern int vn_seek(vnode_t *vp, offset_t o, offset_t *op, void *ct);
extern int vn_getattr(vnode_t *vp, vattr_t *vap, int flags, void *x3, void *x4);
extern int vn_fsync(vnode_t *vp, int flags, void *x3, void *x4);
extern int vn_space(vnode_t *vp, int cmd, struct flock *bfp, int flag,
offset_t offset, void *x6, void *x7);
extern file_t *vn_getf(int fd);
extern void vn_releasef(int fd);
extern void vn_areleasef(int fd, uf_info_t *fip);
int spl_vn_init(void);
void spl_vn_fini(void);
#define VOP_CLOSE vn_close
#define VOP_SEEK vn_seek
#define VOP_GETATTR vn_getattr
#define VOP_FSYNC vn_fsync
#define VOP_SPACE vn_space
#define VOP_PUTPAGE(vp, o, s, f, x1, x2) ((void)0)
#define vn_is_readonly(vp) 0
#define getf vn_getf
#define releasef vn_releasef
#define areleasef vn_areleasef
extern vnode_t *rootdir;
#endif /* SPL_VNODE_H */