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/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     zpl_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 #if defined(HAVE_FILE_FALLOCATE) || defined(HAVE_INODE_FALLOCATE)
  58 extern long zpl_fallocate_common(struct inode *ip, int mode,
  59     loff_t offset, loff_t len);
  60 #endif /* defined(HAVE_FILE_FALLOCATE) || defined(HAVE_INODE_FALLOCATE) */
  61
  62 extern const struct address_space_operations zpl_address_space_operations;
  63 extern const struct file_operations zpl_file_operations;
  64 extern const struct file_operations zpl_dir_file_operations;
  65
  66 /* zpl_super.c */
  67 extern void zpl_prune_sb(int64_t nr_to_scan, void *arg);
  68
  69 extern const struct super_operations zpl_super_operations;
  70 extern const struct export_operations zpl_export_operations;
  71 extern struct file_system_type zpl_fs_type;
  72
  73 /* zpl_xattr.c */
  74 extern ssize_t zpl_xattr_list(struct dentry *dentry, char *buf, size_t size);
  75 extern int zpl_xattr_security_init(struct inode *ip, struct inode *dip,
  76     const struct qstr *qstr);
  77 #if defined(CONFIG_FS_POSIX_ACL)
  78 extern int zpl_set_acl(struct inode *ip, struct posix_acl *acl, int type);
  79 extern struct posix_acl *zpl_get_acl(struct inode *ip, int type);
  80 #if !defined(HAVE_GET_ACL)
  81 #if defined(HAVE_CHECK_ACL_WITH_FLAGS)
  82 extern int zpl_check_acl(struct inode *inode, int mask, unsigned int flags);
  83 #elif defined(HAVE_CHECK_ACL)
  84 extern int zpl_check_acl(struct inode *inode, int mask);
  85 #elif defined(HAVE_PERMISSION_WITH_NAMEIDATA)
  86 extern int zpl_permission(struct inode *ip, int mask, struct nameidata *nd);
  87 #elif defined(HAVE_PERMISSION)
  88 extern int zpl_permission(struct inode *ip, int mask);
  89 #endif /*  HAVE_CHECK_ACL | HAVE_PERMISSION */
  90 #endif /* HAVE_GET_ACL */
  91
  92 extern int zpl_init_acl(struct inode *ip, struct inode *dir);
  93 extern int zpl_chmod_acl(struct inode *ip);
  94 #else
  95 static inline int
  96 zpl_init_acl(struct inode *ip, struct inode *dir)
  97 {
  98         return (0);
  99 }
 100
 101 static inline int
 102 zpl_chmod_acl(struct inode *ip)
 103 {
 104         return (0);
 105 }
 106 #endif /* CONFIG_FS_POSIX_ACL */
 107
 108 extern xattr_handler_t *zpl_xattr_handlers[];
 109
 110 /* zpl_ctldir.c */
 111 extern const struct file_operations zpl_fops_root;
 112 extern const struct inode_operations zpl_ops_root;
 113
 114 extern const struct file_operations zpl_fops_snapdir;
 115 extern const struct inode_operations zpl_ops_snapdir;
 116 #ifdef HAVE_AUTOMOUNT
 117 extern const struct dentry_operations zpl_dops_snapdirs;
 118 #else
 119 extern const struct inode_operations zpl_ops_snapdirs;
 120 #endif /* HAVE_AUTOMOUNT */
 121
 122 extern const struct file_operations zpl_fops_shares;
 123 extern const struct inode_operations zpl_ops_shares;
 124
 125 #if defined(HAVE_VFS_ITERATE) || defined(HAVE_VFS_ITERATE_SHARED)
 126
 127 #define ZPL_DIR_CONTEXT_INIT(_dirent, _actor, _pos) {   \
 128         .actor = _actor,                                \
 129         .pos = _pos,                                    \
 130 }
 131
 132 typedef struct dir_context zpl_dir_context_t;
 133
 134 #define zpl_dir_emit            dir_emit
 135 #define zpl_dir_emit_dot        dir_emit_dot
 136 #define zpl_dir_emit_dotdot     dir_emit_dotdot
 137 #define zpl_dir_emit_dots       dir_emit_dots
 138
 139 #else
 140
 141 typedef struct zpl_dir_context {
 142         void *dirent;
 143         const filldir_t actor;
 144         loff_t pos;
 145 } zpl_dir_context_t;
 146
 147 #define ZPL_DIR_CONTEXT_INIT(_dirent, _actor, _pos) {   \
 148         .dirent = _dirent,                              \
 149         .actor = _actor,                                \
 150         .pos = _pos,                                    \
 151 }
 152
 153 static inline bool
 154 zpl_dir_emit(zpl_dir_context_t *ctx, const char *name, int namelen,
 155     uint64_t ino, unsigned type)
 156 {
 157         return (!ctx->actor(ctx->dirent, name, namelen, ctx->pos, ino, type));
 158 }
 159
 160 static inline bool
 161 zpl_dir_emit_dot(struct file *file, zpl_dir_context_t *ctx)
 162 {
 163         return (ctx->actor(ctx->dirent, ".", 1, ctx->pos,
 164             file_inode(file)->i_ino, DT_DIR) == 0);
 165 }
 166
 167 static inline bool
 168 zpl_dir_emit_dotdot(struct file *file, zpl_dir_context_t *ctx)
 169 {
 170         return (ctx->actor(ctx->dirent, "..", 2, ctx->pos,
 171             parent_ino(file_dentry(file)), DT_DIR) == 0);
 172 }
 173
 174 static inline bool
 175 zpl_dir_emit_dots(struct file *file, zpl_dir_context_t *ctx)
 176 {
 177         if (ctx->pos == 0) {
 178                 if (!zpl_dir_emit_dot(file, ctx))
 179                         return (false);
 180                 ctx->pos = 1;
 181         }
 182         if (ctx->pos == 1) {
 183                 if (!zpl_dir_emit_dotdot(file, ctx))
 184                         return (false);
 185                 ctx->pos = 2;
 186         }
 187         return (true);
 188 }
 189 #endif /* HAVE_VFS_ITERATE */
 190
 191 /*
 192  * Linux 4.18, inode times converted from timespec to timespec64.
 193  */
 194 #if defined(HAVE_INODE_TIMESPEC64_TIMES)
 195 #define zpl_inode_timespec_trunc(ts, gran)      timespec64_trunc(ts, gran)
 196 #else
 197 #define zpl_inode_timespec_trunc(ts, gran)      timespec_trunc(ts, gran)
 198 #endif
 199
 200 #endif  /* _SYS_ZPL_H */