include/os/linux/zfs/sys/zpl.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (c) 2011, Lawrence Livermore National Security, LLC.
  23  */
  24
  25 #ifndef _SYS_ZPL_H
  26 #define _SYS_ZPL_H
  27
  28 #include <sys/mntent.h>
  29 #include <sys/vfs.h>
  30 #include <linux/aio.h>
  31 #include <linux/dcache_compat.h>
  32 #include <linux/exportfs.h>
  33 #include <linux/falloc.h>
  34 #include <linux/parser.h>
  35 #include <linux/task_io_accounting_ops.h>
  36 #include <linux/vfs_compat.h>
  37 #include <linux/writeback.h>
  38 #include <linux/xattr_compat.h>
  39
  40 /* zpl_inode.c */
  41 extern void zpl_vap_init(vattr_t *vap, struct inode *dir,
  42     umode_t mode, cred_t *cr);
  43
  44 extern const struct inode_operations zpl_inode_operations;
  45 extern const struct inode_operations zpl_dir_inode_operations;
  46 extern const struct inode_operations zpl_symlink_inode_operations;
  47 extern const struct inode_operations zpl_special_inode_operations;
  48 extern dentry_operations_t zpl_dentry_operations;
  49 extern const struct address_space_operations zpl_address_space_operations;
  50 extern const struct file_operations zpl_file_operations;
  51 extern const struct file_operations zpl_dir_file_operations;
  52
  53 /* zpl_super.c */
  54 extern void zpl_prune_sb(int64_t nr_to_scan, void *arg);
  55
  56 extern const struct super_operations zpl_super_operations;
  57 extern const struct export_operations zpl_export_operations;
  58 extern struct file_system_type zpl_fs_type;
  59
  60 /* zpl_xattr.c */
  61 extern ssize_t zpl_xattr_list(struct dentry *dentry, char *buf, size_t size);
  62 extern int zpl_xattr_security_init(struct inode *ip, struct inode *dip,
  63     const struct qstr *qstr);
  64 #if defined(CONFIG_FS_POSIX_ACL)
  65 #if defined(HAVE_SET_ACL)
  66 extern int zpl_set_acl(struct inode *ip, struct posix_acl *acl, int type);
  67 #endif /* HAVE_SET_ACL */
  68 extern struct posix_acl *zpl_get_acl(struct inode *ip, int type);
  69 extern int zpl_init_acl(struct inode *ip, struct inode *dir);
  70 extern int zpl_chmod_acl(struct inode *ip);
  71 #else
  72 static inline int
  73 zpl_init_acl(struct inode *ip, struct inode *dir)
  74 {
  75         return (0);
  76 }
  77
  78 static inline int
  79 zpl_chmod_acl(struct inode *ip)
  80 {
  81         return (0);
  82 }
  83 #endif /* CONFIG_FS_POSIX_ACL */
  84
  85 extern xattr_handler_t *zpl_xattr_handlers[];
  86
  87 /* zpl_ctldir.c */
  88 extern const struct file_operations zpl_fops_root;
  89 extern const struct inode_operations zpl_ops_root;
  90
  91 extern const struct file_operations zpl_fops_snapdir;
  92 extern const struct inode_operations zpl_ops_snapdir;
  93 extern const struct dentry_operations zpl_dops_snapdirs;
  94
  95 extern const struct file_operations zpl_fops_shares;
  96 extern const struct inode_operations zpl_ops_shares;
  97
  98 #if defined(HAVE_VFS_ITERATE) || defined(HAVE_VFS_ITERATE_SHARED)
  99
 100 #define ZPL_DIR_CONTEXT_INIT(_dirent, _actor, _pos) {   \
 101         .actor = _actor,                                \
 102         .pos = _pos,                                    \
 103 }
 104
 105 typedef struct dir_context zpl_dir_context_t;
 106
 107 #define zpl_dir_emit            dir_emit
 108 #define zpl_dir_emit_dot        dir_emit_dot
 109 #define zpl_dir_emit_dotdot     dir_emit_dotdot
 110 #define zpl_dir_emit_dots       dir_emit_dots
 111
 112 #else
 113
 114 typedef struct zpl_dir_context {
 115         void *dirent;
 116         const filldir_t actor;
 117         loff_t pos;
 118 } zpl_dir_context_t;
 119
 120 #define ZPL_DIR_CONTEXT_INIT(_dirent, _actor, _pos) {   \
 121         .dirent = _dirent,                              \
 122         .actor = _actor,                                \
 123         .pos = _pos,                                    \
 124 }
 125
 126 static inline bool
 127 zpl_dir_emit(zpl_dir_context_t *ctx, const char *name, int namelen,
 128     uint64_t ino, unsigned type)
 129 {
 130         return (!ctx->actor(ctx->dirent, name, namelen, ctx->pos, ino, type));
 131 }
 132
 133 static inline bool
 134 zpl_dir_emit_dot(struct file *file, zpl_dir_context_t *ctx)
 135 {
 136         return (ctx->actor(ctx->dirent, ".", 1, ctx->pos,
 137             file_inode(file)->i_ino, DT_DIR) == 0);
 138 }
 139
 140 static inline bool
 141 zpl_dir_emit_dotdot(struct file *file, zpl_dir_context_t *ctx)
 142 {
 143         return (ctx->actor(ctx->dirent, "..", 2, ctx->pos,
 144             parent_ino(file_dentry(file)), DT_DIR) == 0);
 145 }
 146
 147 static inline bool
 148 zpl_dir_emit_dots(struct file *file, zpl_dir_context_t *ctx)
 149 {
 150         if (ctx->pos == 0) {
 151                 if (!zpl_dir_emit_dot(file, ctx))
 152                         return (false);
 153                 ctx->pos = 1;
 154         }
 155         if (ctx->pos == 1) {
 156                 if (!zpl_dir_emit_dotdot(file, ctx))
 157                         return (false);
 158                 ctx->pos = 2;
 159         }
 160         return (true);
 161 }
 162 #endif /* HAVE_VFS_ITERATE */
 163
 164 #if defined(HAVE_INODE_TIMESTAMP_TRUNCATE)
 165 #define zpl_inode_timestamp_truncate(ts, ip)    timestamp_truncate(ts, ip)
 166 #elif defined(HAVE_INODE_TIMESPEC64_TIMES)
 167 #define zpl_inode_timestamp_truncate(ts, ip)    \
 168         timespec64_trunc(ts, (ip)->i_sb->s_time_gran)
 169 #else
 170 #define zpl_inode_timestamp_truncate(ts, ip)    \
 171         timespec_trunc(ts, (ip)->i_sb->s_time_gran)
 172 #endif
 173
 174 #endif  /* _SYS_ZPL_H */