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Prior to Linux 3.1 the kern_path_parent symbol was exported for use by kernel modules. As of Linux 3.1 it is now longer easily available. To handle this case the spl will now dynamically look up address of the missing symbol at module load time. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue #52
208 lines
6.3 KiB
C
208 lines
6.3 KiB
C
/*****************************************************************************\
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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* For details, see <http://github.com/behlendorf/spl/>.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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\*****************************************************************************/
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#ifndef _SPL_VNODE_H
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#define _SPL_VNODE_H
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#include <linux/module.h>
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#include <linux/syscalls.h>
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#include <linux/fcntl.h>
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#include <linux/buffer_head.h>
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#include <linux/dcache.h>
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#include <linux/namei.h>
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#include <linux/file.h>
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#include <linux/fs.h>
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#include <linux/fs_struct.h>
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#include <linux/mount.h>
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#include <sys/kmem.h>
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#include <sys/mutex.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/uio.h>
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#include <sys/sunldi.h>
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/*
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* Prior to linux-2.6.33 only O_DSYNC semantics were implemented and
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* they used the O_SYNC flag. As of linux-2.6.33 the this behavior
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* was properly split in to O_SYNC and O_DSYNC respectively.
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*/
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#ifndef O_DSYNC
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#define O_DSYNC O_SYNC
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#endif
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#define FREAD 1
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#define FWRITE 2
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#define FCREAT O_CREAT
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#define FTRUNC O_TRUNC
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#define FOFFMAX O_LARGEFILE
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#define FSYNC O_SYNC
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#define FDSYNC O_DSYNC
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#define FRSYNC O_SYNC
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#define FEXCL O_EXCL
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#define FDIRECT O_DIRECT
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#define FAPPEND O_APPEND
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#define FNODSYNC 0x10000 /* fsync pseudo flag */
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#define FNOFOLLOW 0x20000 /* don't follow symlinks */
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/*
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* The vnode AT_ flags are mapped to the Linux ATTR_* flags.
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* This allows them to be used safely with an iattr structure.
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* The AT_XVATTR flag has been added and mapped to the upper
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* bit range to avoid conflicting with the standard Linux set.
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*/
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#undef AT_UID
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#undef AT_GID
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#define AT_MODE ATTR_MODE
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#define AT_UID ATTR_UID
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#define AT_GID ATTR_GID
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#define AT_SIZE ATTR_SIZE
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#define AT_ATIME ATTR_ATIME
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#define AT_MTIME ATTR_MTIME
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#define AT_CTIME ATTR_CTIME
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#define ATTR_XVATTR (1 << 31)
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#define AT_XVATTR ATTR_XVATTR
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#define ATTR_IATTR_MASK (ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_SIZE | \
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ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_FILE)
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#define CRCREAT 0x01
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#define RMFILE 0x02
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#define B_INVAL 0x01
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#define B_TRUNC 0x02
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#define LOOKUP_DIR 0x01
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#define LOOKUP_XATTR 0x02
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#define CREATE_XATTR_DIR 0x04
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#define ATTR_NOACLCHECK 0x20
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#ifdef HAVE_PATH_IN_NAMEIDATA
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# define nd_dentry path.dentry
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# define nd_mnt path.mnt
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#else
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# define nd_dentry dentry
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# define nd_mnt mnt
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#endif
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typedef enum vtype {
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VNON = 0,
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VREG = 1,
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VDIR = 2,
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VBLK = 3,
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VCHR = 4,
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VLNK = 5,
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VFIFO = 6,
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VDOOR = 7,
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VPROC = 8,
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VSOCK = 9,
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VPORT = 10,
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VBAD = 11
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} vtype_t;
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typedef struct vattr {
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enum vtype va_type; /* vnode type */
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u_int va_mask; /* attribute bit-mask */
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u_short va_mode; /* acc mode */
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uid_t va_uid; /* owner uid */
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gid_t va_gid; /* owner gid */
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long va_fsid; /* fs id */
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long va_nodeid; /* node # */
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uint32_t va_nlink; /* # links */
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uint64_t va_size; /* file size */
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struct timespec va_atime; /* last acc */
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struct timespec va_mtime; /* last mod */
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struct timespec va_ctime; /* last chg */
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dev_t va_rdev; /* dev */
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uint64_t va_nblocks; /* space used */
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uint32_t va_blksize; /* block size */
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uint32_t va_seq; /* sequence */
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struct dentry *va_dentry; /* dentry to wire */
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} vattr_t;
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typedef struct vnode {
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struct file *v_file;
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kmutex_t v_lock; /* protects vnode fields */
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uint_t v_flag; /* vnode flags (see below) */
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uint_t v_count; /* reference count */
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void *v_data; /* private data for fs */
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struct vfs *v_vfsp; /* ptr to containing VFS */
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struct stdata *v_stream; /* associated stream */
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enum vtype v_type; /* vnode type */
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dev_t v_rdev; /* device (VCHR, VBLK) */
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gfp_t v_gfp_mask; /* original mapping gfp mask */
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} vnode_t;
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typedef struct vn_file {
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int f_fd; /* linux fd for lookup */
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struct task_struct *f_task; /* linux task this fd belongs to */
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struct file *f_file; /* linux file struct */
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atomic_t f_ref; /* ref count */
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kmutex_t f_lock; /* struct lock */
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loff_t f_offset; /* offset */
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vnode_t *f_vnode; /* vnode */
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struct list_head f_list; /* list referenced file_t's */
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} file_t;
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extern vnode_t *vn_alloc(int flag);
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void vn_free(vnode_t *vp);
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extern vtype_t vn_mode_to_vtype(mode_t);
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extern mode_t vn_vtype_to_mode(vtype_t);
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extern int vn_open(const char *path, uio_seg_t seg, int flags, int mode,
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vnode_t **vpp, int x1, void *x2);
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extern int vn_openat(const char *path, uio_seg_t seg, int flags, int mode,
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vnode_t **vpp, int x1, void *x2, vnode_t *vp, int fd);
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extern int vn_rdwr(uio_rw_t uio, vnode_t *vp, void *addr, ssize_t len,
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offset_t off, uio_seg_t seg, int x1, rlim64_t x2,
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void *x3, ssize_t *residp);
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extern int vn_close(vnode_t *vp, int flags, int x1, int x2, void *x3, void *x4);
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extern int vn_seek(vnode_t *vp, offset_t o, offset_t *op, void *ct);
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extern int vn_remove(const char *path, uio_seg_t seg, int flags);
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extern int vn_rename(const char *path1, const char *path2, int x1);
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extern int vn_getattr(vnode_t *vp, vattr_t *vap, int flags, void *x3, void *x4);
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extern int vn_fsync(vnode_t *vp, int flags, void *x3, void *x4);
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extern file_t *vn_getf(int fd);
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extern void vn_releasef(int fd);
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extern int vn_set_pwd(const char *filename);
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int spl_vn_init_kallsyms_lookup(void);
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int spl_vn_init(void);
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void spl_vn_fini(void);
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#define VOP_CLOSE vn_close
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#define VOP_SEEK vn_seek
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#define VOP_GETATTR vn_getattr
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#define VOP_FSYNC vn_fsync
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#define VOP_PUTPAGE(vp, o, s, f, x1, x2) ((void)0)
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#define vn_is_readonly(vp) 0
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#define getf vn_getf
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#define releasef vn_releasef
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extern vnode_t *rootdir;
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#endif /* SPL_VNODE_H */
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