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
  50 /* zpl_file.c */
  51 extern ssize_t zpl_read_common(struct inode *ip, const char *buf,
  52     size_t len, loff_t *ppos, uio_seg_t segment, int flags,
  53     cred_t *cr);
  54 extern ssize_t zpl_write_common(struct inode *ip, const char *buf,
  55     size_t len, loff_t *ppos, uio_seg_t segment, int flags,
  56     cred_t *cr);
  57
  58 extern const struct address_space_operations zpl_address_space_operations;
  59 extern const struct file_operations zpl_file_operations;
  60 extern const struct file_operations zpl_dir_file_operations;
  61
  62 /* zpl_super.c */
  63 extern void zpl_prune_sb(int64_t nr_to_scan, void *arg);
  64
  65 extern const struct super_operations zpl_super_operations;
  66 extern const struct export_operations zpl_export_operations;
  67 extern struct file_system_type zpl_fs_type;
  68
  69 /* zpl_xattr.c */
  70 extern ssize_t zpl_xattr_list(struct dentry *dentry, char *buf, size_t size);
  71 extern int zpl_xattr_security_init(struct inode *ip, struct inode *dip,
  72     const struct qstr *qstr);
  73 #if defined(CONFIG_FS_POSIX_ACL)
  74 #if defined(HAVE_SET_ACL)
  75 extern int zpl_set_acl(struct inode *ip, struct posix_acl *acl, int type);
  76 #endif /* HAVE_SET_ACL */
  77 extern struct posix_acl *zpl_get_acl(struct inode *ip, int type);
  78 extern int zpl_init_acl(struct inode *ip, struct inode *dir);
  79 extern int zpl_chmod_acl(struct inode *ip);
  80 #else
  81 static inline int
  82 zpl_init_acl(struct inode *ip, struct inode *dir)
  83 {
  84         return (0);
  85 }
  86
  87 static inline int
  88 zpl_chmod_acl(struct inode *ip)
  89 {
  90         return (0);
  91 }
  92 #endif /* CONFIG_FS_POSIX_ACL */
  93
  94 extern xattr_handler_t *zpl_xattr_handlers[];
  95
  96 /* zpl_ctldir.c */
  97 extern const struct file_operations zpl_fops_root;
  98 extern const struct inode_operations zpl_ops_root;
  99
 100 extern const struct file_operations zpl_fops_snapdir;
 101 extern const struct inode_operations zpl_ops_snapdir;
 102 extern const struct dentry_operations zpl_dops_snapdirs;
 103
 104 extern const struct file_operations zpl_fops_shares;
 105 extern const struct inode_operations zpl_ops_shares;
 106
 107 #if defined(HAVE_VFS_ITERATE) || defined(HAVE_VFS_ITERATE_SHARED)
 108
 109 #define ZPL_DIR_CONTEXT_INIT(_dirent, _actor, _pos) {   \
 110         .actor = _actor,                                \
 111         .pos = _pos,                                    \
 112 }
 113
 114 typedef struct dir_context zpl_dir_context_t;
 115
 116 #define zpl_dir_emit            dir_emit
 117 #define zpl_dir_emit_dot        dir_emit_dot
 118 #define zpl_dir_emit_dotdot     dir_emit_dotdot
 119 #define zpl_dir_emit_dots       dir_emit_dots
 120
 121 #else
 122
 123 typedef struct zpl_dir_context {
 124         void *dirent;
 125         const filldir_t actor;
 126         loff_t pos;
 127 } zpl_dir_context_t;
 128
 129 #define ZPL_DIR_CONTEXT_INIT(_dirent, _actor, _pos) {   \
 130         .dirent = _dirent,                              \
 131         .actor = _actor,                                \
 132         .pos = _pos,                                    \
 133 }
 134
 135 static inline bool
 136 zpl_dir_emit(zpl_dir_context_t *ctx, const char *name, int namelen,
 137     uint64_t ino, unsigned type)
 138 {
 139         return (!ctx->actor(ctx->dirent, name, namelen, ctx->pos, ino, type));
 140 }
 141
 142 static inline bool
 143 zpl_dir_emit_dot(struct file *file, zpl_dir_context_t *ctx)
 144 {
 145         return (ctx->actor(ctx->dirent, ".", 1, ctx->pos,
 146             file_inode(file)->i_ino, DT_DIR) == 0);
 147 }
 148
 149 static inline bool
 150 zpl_dir_emit_dotdot(struct file *file, zpl_dir_context_t *ctx)
 151 {
 152         return (ctx->actor(ctx->dirent, "..", 2, ctx->pos,
 153             parent_ino(file_dentry(file)), DT_DIR) == 0);
 154 }
 155
 156 static inline bool
 157 zpl_dir_emit_dots(struct file *file, zpl_dir_context_t *ctx)
 158 {
 159         if (ctx->pos == 0) {
 160                 if (!zpl_dir_emit_dot(file, ctx))
 161                         return (false);
 162                 ctx->pos = 1;
 163         }
 164         if (ctx->pos == 1) {
 165                 if (!zpl_dir_emit_dotdot(file, ctx))
 166                         return (false);
 167                 ctx->pos = 2;
 168         }
 169         return (true);
 170 }
 171 #endif /* HAVE_VFS_ITERATE */
 172
 173 /*
 174  * Linux 4.18, inode times converted from timespec to timespec64.
 175  */
 176 #if defined(HAVE_INODE_TIMESPEC64_TIMES)
 177 #define zpl_inode_timespec_trunc(ts, gran)      timespec64_trunc(ts, gran)
 178 #else
 179 #define zpl_inode_timespec_trunc(ts, gran)      timespec_trunc(ts, gran)
 180 #endif
 181
 182 #endif  /* _SYS_ZPL_H */