include/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/file_compat.h>
  35 #include <linux/parser.h>
  36 #include <linux/task_io_accounting_ops.h>
  37 #include <linux/vfs_compat.h>
  38 #include <linux/writeback.h>
  39 #include <linux/xattr_compat.h>
  40
  41 /* zpl_inode.c */
  42 extern void zpl_vap_init(vattr_t *vap, struct inode *dir,
  43     zpl_umode_t mode, cred_t *cr);
  44
  45 extern const struct inode_operations zpl_inode_operations;
  46 extern const struct inode_operations zpl_dir_inode_operations;
  47 extern const struct inode_operations zpl_symlink_inode_operations;
  48 extern const struct inode_operations zpl_special_inode_operations;
  49 extern dentry_operations_t zpl_dentry_operations;
  50
  51 /* zpl_file.c */
  52 extern ssize_t zpl_read_common(struct inode *ip, const char *buf,
  53     size_t len, loff_t *ppos, uio_seg_t segment, int flags,
  54     cred_t *cr);
  55 extern ssize_t zpl_write_common(struct inode *ip, const char *buf,
  56     size_t len, loff_t *ppos, uio_seg_t segment, int flags,
  57     cred_t *cr);
  58 #if defined(HAVE_FILE_FALLOCATE) || defined(HAVE_INODE_FALLOCATE)
  59 extern long zpl_fallocate_common(struct inode *ip, int mode,
  60     loff_t offset, loff_t len);
  61 #endif /* defined(HAVE_FILE_FALLOCATE) || defined(HAVE_INODE_FALLOCATE) */
  62
  63 extern const struct address_space_operations zpl_address_space_operations;
  64 extern const struct file_operations zpl_file_operations;
  65 extern const struct file_operations zpl_dir_file_operations;
  66
  67 /* zpl_super.c */
  68 extern void zpl_prune_sb(int64_t nr_to_scan, void *arg);
  69
  70 extern const struct super_operations zpl_super_operations;
  71 extern const struct export_operations zpl_export_operations;
  72 extern struct file_system_type zpl_fs_type;
  73
  74 /* zpl_xattr.c */
  75 extern ssize_t zpl_xattr_list(struct dentry *dentry, char *buf, size_t size);
  76 extern int zpl_xattr_security_init(struct inode *ip, struct inode *dip,
  77     const struct qstr *qstr);
  78 #if defined(CONFIG_FS_POSIX_ACL)
  79 extern int zpl_set_acl(struct inode *ip, struct posix_acl *acl, int type);
  80 extern struct posix_acl *zpl_get_acl(struct inode *ip, int type);
  81 #if !defined(HAVE_GET_ACL)
  82 #if defined(HAVE_CHECK_ACL_WITH_FLAGS)
  83 extern int zpl_check_acl(struct inode *inode, int mask, unsigned int flags);
  84 #elif defined(HAVE_CHECK_ACL)
  85 extern int zpl_check_acl(struct inode *inode, int mask);
  86 #elif defined(HAVE_PERMISSION_WITH_NAMEIDATA)
  87 extern int zpl_permission(struct inode *ip, int mask, struct nameidata *nd);
  88 #elif defined(HAVE_PERMISSION)
  89 extern int zpl_permission(struct inode *ip, int mask);
  90 #endif /*  HAVE_CHECK_ACL | HAVE_PERMISSION */
  91 #endif /* HAVE_GET_ACL */
  92
  93 extern int zpl_init_acl(struct inode *ip, struct inode *dir);
  94 extern int zpl_chmod_acl(struct inode *ip);
  95 #else
  96 static inline int
  97 zpl_init_acl(struct inode *ip, struct inode *dir)
  98 {
  99         return (0);
 100 }
 101
 102 static inline int
 103 zpl_chmod_acl(struct inode *ip)
 104 {
 105         return (0);
 106 }
 107 #endif /* CONFIG_FS_POSIX_ACL */
 108
 109 extern xattr_handler_t *zpl_xattr_handlers[];
 110
 111 /* zpl_ctldir.c */
 112 extern const struct file_operations zpl_fops_root;
 113 extern const struct inode_operations zpl_ops_root;
 114
 115 extern const struct file_operations zpl_fops_snapdir;
 116 extern const struct inode_operations zpl_ops_snapdir;
 117 #ifdef HAVE_AUTOMOUNT
 118 extern const struct dentry_operations zpl_dops_snapdirs;
 119 #else
 120 extern const struct inode_operations zpl_ops_snapdirs;
 121 #endif /* HAVE_AUTOMOUNT */
 122
 123 extern const struct file_operations zpl_fops_shares;
 124 extern const struct inode_operations zpl_ops_shares;
 125
 126 #if defined(HAVE_VFS_ITERATE) || defined(HAVE_VFS_ITERATE_SHARED)
 127
 128 #define ZPL_DIR_CONTEXT_INIT(_dirent, _actor, _pos) {   \
 129         .actor = _actor,                                \
 130         .pos = _pos,                                    \
 131 }
 132
 133 typedef struct dir_context zpl_dir_context_t;
 134
 135 #define zpl_dir_emit            dir_emit
 136 #define zpl_dir_emit_dot        dir_emit_dot
 137 #define zpl_dir_emit_dotdot     dir_emit_dotdot
 138 #define zpl_dir_emit_dots       dir_emit_dots
 139
 140 #else
 141
 142 typedef struct zpl_dir_context {
 143         void *dirent;
 144         const filldir_t actor;
 145         loff_t pos;
 146 } zpl_dir_context_t;
 147
 148 #define ZPL_DIR_CONTEXT_INIT(_dirent, _actor, _pos) {   \
 149         .dirent = _dirent,                              \
 150         .actor = _actor,                                \
 151         .pos = _pos,                                    \
 152 }
 153
 154 static inline bool
 155 zpl_dir_emit(zpl_dir_context_t *ctx, const char *name, int namelen,
 156     uint64_t ino, unsigned type)
 157 {
 158         return (!ctx->actor(ctx->dirent, name, namelen, ctx->pos, ino, type));
 159 }
 160
 161 static inline bool
 162 zpl_dir_emit_dot(struct file *file, zpl_dir_context_t *ctx)
 163 {
 164         return (ctx->actor(ctx->dirent, ".", 1, ctx->pos,
 165             file_inode(file)->i_ino, DT_DIR) == 0);
 166 }
 167
 168 static inline bool
 169 zpl_dir_emit_dotdot(struct file *file, zpl_dir_context_t *ctx)
 170 {
 171         return (ctx->actor(ctx->dirent, "..", 2, ctx->pos,
 172             parent_ino(file_dentry(file)), DT_DIR) == 0);
 173 }
 174
 175 static inline bool
 176 zpl_dir_emit_dots(struct file *file, zpl_dir_context_t *ctx)
 177 {
 178         if (ctx->pos == 0) {
 179                 if (!zpl_dir_emit_dot(file, ctx))
 180                         return (false);
 181                 ctx->pos = 1;
 182         }
 183         if (ctx->pos == 1) {
 184                 if (!zpl_dir_emit_dotdot(file, ctx))
 185                         return (false);
 186                 ctx->pos = 2;
 187         }
 188         return (true);
 189 }
 190 #endif /* HAVE_VFS_ITERATE */
 191
 192 #endif  /* _SYS_ZPL_H */