c24b5dfadc
Now we have xfs_inode.c for holding kernel-only XFS inode operations, move all the inode operations from xfs_vnodeops.c to this new file as it holds another set of kernel-only inode operations. The name of this file traces back to the days of Irix and it's vnodes which we don't have anymore. Essentially this move consolidates the inode locking functions and a bunch of XFS inode operations into the one file. Eventually the high level functions will be merged into the VFS interface functions in xfs_iops.c. This leaves only internal preallocation, EOF block manipulation and hole punching functions in vnodeops.c. Move these to xfs_bmap_util.c where we are already consolidating various in-kernel physical extent manipulation and querying functions. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
154 lines
5.9 KiB
C
154 lines
5.9 KiB
C
/*
|
|
* Copyright (c) 2000,2002-2003,2005 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it would be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#ifndef __XFS_ATTR_H__
|
|
#define __XFS_ATTR_H__
|
|
|
|
struct xfs_inode;
|
|
struct xfs_da_args;
|
|
struct xfs_attr_list_context;
|
|
|
|
/*
|
|
* Large attribute lists are structured around Btrees where all the data
|
|
* elements are in the leaf nodes. Attribute names are hashed into an int,
|
|
* then that int is used as the index into the Btree. Since the hashval
|
|
* of an attribute name may not be unique, we may have duplicate keys.
|
|
* The internal links in the Btree are logical block offsets into the file.
|
|
*
|
|
* Small attribute lists use a different format and are packed as tightly
|
|
* as possible so as to fit into the literal area of the inode.
|
|
*/
|
|
|
|
/*========================================================================
|
|
* External interfaces
|
|
*========================================================================*/
|
|
|
|
|
|
#define ATTR_DONTFOLLOW 0x0001 /* -- unused, from IRIX -- */
|
|
#define ATTR_ROOT 0x0002 /* use attrs in root (trusted) namespace */
|
|
#define ATTR_TRUST 0x0004 /* -- unused, from IRIX -- */
|
|
#define ATTR_SECURE 0x0008 /* use attrs in security namespace */
|
|
#define ATTR_CREATE 0x0010 /* pure create: fail if attr already exists */
|
|
#define ATTR_REPLACE 0x0020 /* pure set: fail if attr does not exist */
|
|
|
|
#define ATTR_KERNOTIME 0x1000 /* [kernel] don't update inode timestamps */
|
|
#define ATTR_KERNOVAL 0x2000 /* [kernel] get attr size only, not value */
|
|
|
|
#define XFS_ATTR_FLAGS \
|
|
{ ATTR_DONTFOLLOW, "DONTFOLLOW" }, \
|
|
{ ATTR_ROOT, "ROOT" }, \
|
|
{ ATTR_TRUST, "TRUST" }, \
|
|
{ ATTR_SECURE, "SECURE" }, \
|
|
{ ATTR_CREATE, "CREATE" }, \
|
|
{ ATTR_REPLACE, "REPLACE" }, \
|
|
{ ATTR_KERNOTIME, "KERNOTIME" }, \
|
|
{ ATTR_KERNOVAL, "KERNOVAL" }
|
|
|
|
/*
|
|
* The maximum size (into the kernel or returned from the kernel) of an
|
|
* attribute value or the buffer used for an attr_list() call. Larger
|
|
* sizes will result in an ERANGE return code.
|
|
*/
|
|
#define ATTR_MAX_VALUELEN (64*1024) /* max length of a value */
|
|
|
|
/*
|
|
* Define how lists of attribute names are returned to the user from
|
|
* the attr_list() call. A large, 32bit aligned, buffer is passed in
|
|
* along with its size. We put an array of offsets at the top that each
|
|
* reference an attrlist_ent_t and pack the attrlist_ent_t's at the bottom.
|
|
*/
|
|
typedef struct attrlist {
|
|
__s32 al_count; /* number of entries in attrlist */
|
|
__s32 al_more; /* T/F: more attrs (do call again) */
|
|
__s32 al_offset[1]; /* byte offsets of attrs [var-sized] */
|
|
} attrlist_t;
|
|
|
|
/*
|
|
* Show the interesting info about one attribute. This is what the
|
|
* al_offset[i] entry points to.
|
|
*/
|
|
typedef struct attrlist_ent { /* data from attr_list() */
|
|
__u32 a_valuelen; /* number bytes in value of attr */
|
|
char a_name[1]; /* attr name (NULL terminated) */
|
|
} attrlist_ent_t;
|
|
|
|
/*
|
|
* Given a pointer to the (char*) buffer containing the attr_list() result,
|
|
* and an index, return a pointer to the indicated attribute in the buffer.
|
|
*/
|
|
#define ATTR_ENTRY(buffer, index) \
|
|
((attrlist_ent_t *) \
|
|
&((char *)buffer)[ ((attrlist_t *)(buffer))->al_offset[index] ])
|
|
|
|
/*
|
|
* Kernel-internal version of the attrlist cursor.
|
|
*/
|
|
typedef struct attrlist_cursor_kern {
|
|
__u32 hashval; /* hash value of next entry to add */
|
|
__u32 blkno; /* block containing entry (suggestion) */
|
|
__u32 offset; /* offset in list of equal-hashvals */
|
|
__u16 pad1; /* padding to match user-level */
|
|
__u8 pad2; /* padding to match user-level */
|
|
__u8 initted; /* T/F: cursor has been initialized */
|
|
} attrlist_cursor_kern_t;
|
|
|
|
|
|
/*========================================================================
|
|
* Structure used to pass context around among the routines.
|
|
*========================================================================*/
|
|
|
|
|
|
typedef int (*put_listent_func_t)(struct xfs_attr_list_context *, int,
|
|
unsigned char *, int, int, unsigned char *);
|
|
|
|
typedef struct xfs_attr_list_context {
|
|
struct xfs_inode *dp; /* inode */
|
|
struct attrlist_cursor_kern *cursor; /* position in list */
|
|
char *alist; /* output buffer */
|
|
int seen_enough; /* T/F: seen enough of list? */
|
|
ssize_t count; /* num used entries */
|
|
int dupcnt; /* count dup hashvals seen */
|
|
int bufsize; /* total buffer size */
|
|
int firstu; /* first used byte in buffer */
|
|
int flags; /* from VOP call */
|
|
int resynch; /* T/F: resynch with cursor */
|
|
int put_value; /* T/F: need value for listent */
|
|
put_listent_func_t put_listent; /* list output fmt function */
|
|
int index; /* index into output buffer */
|
|
} xfs_attr_list_context_t;
|
|
|
|
|
|
/*========================================================================
|
|
* Function prototypes for the kernel.
|
|
*========================================================================*/
|
|
|
|
/*
|
|
* Overall external interface routines.
|
|
*/
|
|
int xfs_attr_inactive(struct xfs_inode *dp);
|
|
int xfs_attr_list_int(struct xfs_attr_list_context *);
|
|
int xfs_inode_hasattr(struct xfs_inode *ip);
|
|
int xfs_attr_get(struct xfs_inode *ip, const unsigned char *name,
|
|
unsigned char *value, int *valuelenp, int flags);
|
|
int xfs_attr_set(struct xfs_inode *dp, const unsigned char *name,
|
|
unsigned char *value, int valuelen, int flags);
|
|
int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags);
|
|
int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize,
|
|
int flags, struct attrlist_cursor_kern *cursor);
|
|
|
|
|
|
#endif /* __XFS_ATTR_H__ */
|