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