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[XFS] Switches xfs_vn_listxattr to set it's put_listent callback directly

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and not go through xfs_attr_list.

SGI-PV: 983395

SGI-Modid: xfs-linux-melb:xfs-kern:31324a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
This commit is contained in:
Christoph Hellwig 2008-06-23 13:23:48 +10:00 • committed by Niv Sardi
parent caf8aabdbc
commit ad9b463aa2
5 changed files with 84 additions and 203 deletions
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3
fs/xfs/xfs_acl.c
View file

@ -341,8 +341,7 @@ xfs_acl_iaccess(
/* If the file has no ACL return -1. */
rval = sizeof(xfs_acl_t);
if (xfs_attr_fetch(ip, &acl_name, (char *)acl, &rval,
ATTR_ROOT | ATTR_KERNACCESS)) {
if (xfs_attr_fetch(ip, &acl_name, (char *)acl, &rval, ATTR_ROOT)) {
_ACL_FREE(acl);
return -1;
}

139
fs/xfs/xfs_attr.c
View file

@ -16,8 +16,6 @@
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/capability.h>
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_types.h"
@ -607,12 +605,20 @@ xfs_attr_remove(
return xfs_attr_remove_int(dp, &xname, flags);
}
STATIC int
int
xfs_attr_list_int(xfs_attr_list_context_t *context)
{
int error;
xfs_inode_t *dp = context->dp;
XFS_STATS_INC(xs_attr_list);
if (XFS_FORCED_SHUTDOWN(dp->i_mount))
return EIO;
xfs_ilock(dp, XFS_ILOCK_SHARED);
xfs_attr_trace_l_c("syscall start", context);
/*
* Decide on what work routines to call based on the inode size.
*/
@ -625,6 +631,10 @@ xfs_attr_list_int(xfs_attr_list_context_t *context)
} else {
error = xfs_attr_node_list(context);
}
xfs_iunlock(dp, XFS_ILOCK_SHARED);
xfs_attr_trace_l_c("syscall end", context);
return error;
}
@ -641,74 +651,50 @@ xfs_attr_list_int(xfs_attr_list_context_t *context)
*/
/*ARGSUSED*/
STATIC int
xfs_attr_put_listent(xfs_attr_list_context_t *context, attrnames_t *namesp,
xfs_attr_put_listent(xfs_attr_list_context_t *context, int flags,
char *name, int namelen,
int valuelen, char *value)
{
struct attrlist *alist = (struct attrlist *)context->alist;
attrlist_ent_t *aep;
int arraytop;
ASSERT(!(context->flags & ATTR_KERNOVAL));
ASSERT(context->count >= 0);
ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
ASSERT(context->firstu >= sizeof(*context->alist));
ASSERT(context->firstu >= sizeof(*alist));
ASSERT(context->firstu <= context->bufsize);
arraytop = sizeof(*context->alist) +
context->count * sizeof(context->alist->al_offset[0]);
/*
* Only list entries in the right namespace.
*/
if (((context->flags & ATTR_SECURE) == 0) !=
((flags & XFS_ATTR_SECURE) == 0))
return 0;
if (((context->flags & ATTR_ROOT) == 0) !=
((flags & XFS_ATTR_ROOT) == 0))
return 0;
arraytop = sizeof(*alist) +
context->count * sizeof(alist->al_offset[0]);
context->firstu -= ATTR_ENTSIZE(namelen);
if (context->firstu < arraytop) {
xfs_attr_trace_l_c("buffer full", context);
context->alist->al_more = 1;
alist->al_more = 1;
context->seen_enough = 1;
return 1;
}
aep = (attrlist_ent_t *)&(((char *)context->alist)[ context->firstu ]);
aep = (attrlist_ent_t *)&context->alist[context->firstu];
aep->a_valuelen = valuelen;
memcpy(aep->a_name, name, namelen);
aep->a_name[ namelen ] = 0;
context->alist->al_offset[ context->count++ ] = context->firstu;
context->alist->al_count = context->count;
aep->a_name[namelen] = 0;
alist->al_offset[context->count++] = context->firstu;
alist->al_count = context->count;
xfs_attr_trace_l_c("add", context);
return 0;
}
STATIC int
xfs_attr_kern_list(xfs_attr_list_context_t *context, attrnames_t *namesp,
char *name, int namelen,
int valuelen, char *value)
{
char *offset;
int arraytop;
ASSERT(context->count >= 0);
arraytop = context->count + namesp->attr_namelen + namelen + 1;
if (arraytop > context->firstu) {
context->count = -1; /* insufficient space */
return 1;
}
offset = (char *)context->alist + context->count;
strncpy(offset, namesp->attr_name, namesp->attr_namelen);
offset += namesp->attr_namelen;
strncpy(offset, name, namelen); /* real name */
offset += namelen;
*offset = '\0';
context->count += namesp->attr_namelen + namelen + 1;
return 0;
}
/*ARGSUSED*/
STATIC int
xfs_attr_kern_list_sizes(xfs_attr_list_context_t *context, attrnames_t *namesp,
char *name, int namelen,
int valuelen, char *value)
{
context->count += namesp->attr_namelen + namelen + 1;
return 0;
}
/*
* Generate a list of extended attribute names and optionally
* also value lengths. Positive return value follows the XFS
@ -725,10 +711,9 @@ xfs_attr_list(
attrlist_cursor_kern_t *cursor)
{
xfs_attr_list_context_t context;
struct attrlist *alist;
int error;
XFS_STATS_INC(xs_attr_list);
/*
* Validate the cursor.
*/
@ -749,52 +734,23 @@ xfs_attr_list(
/*
* Initialize the output buffer.
*/
memset(&context, 0, sizeof(context));
context.dp = dp;
context.cursor = cursor;
context.count = 0;
context.dupcnt = 0;
context.resynch = 1;
context.flags = flags;
context.seen_enough = 0;
context.alist = (attrlist_t *)buffer;
context.put_value = 0;
context.alist = buffer;
context.bufsize = (bufsize & ~(sizeof(int)-1)); /* align */
context.firstu = context.bufsize;
context.put_listent = xfs_attr_put_listent;
if (flags & ATTR_KERNAMELS) {
context.bufsize = bufsize;
context.firstu = context.bufsize;
if (flags & ATTR_KERNOVAL)
context.put_listent = xfs_attr_kern_list_sizes;
else
context.put_listent = xfs_attr_kern_list;
} else {
context.bufsize = (bufsize & ~(sizeof(int)-1)); /* align */
context.firstu = context.bufsize;
context.alist->al_count = 0;
context.alist->al_more = 0;
context.alist->al_offset[0] = context.bufsize;
context.put_listent = xfs_attr_put_listent;
}
if (XFS_FORCED_SHUTDOWN(dp->i_mount))
return EIO;
xfs_ilock(dp, XFS_ILOCK_SHARED);
xfs_attr_trace_l_c("syscall start", &context);
alist = (struct attrlist *)context.alist;
alist->al_count = 0;
alist->al_more = 0;
alist->al_offset[0] = context.bufsize;
error = xfs_attr_list_int(&context);
xfs_iunlock(dp, XFS_ILOCK_SHARED);
xfs_attr_trace_l_c("syscall end", &context);
if (context.flags & (ATTR_KERNOVAL|ATTR_KERNAMELS)) {
/* must return negated buffer size or the error */
if (context.count < 0)
error = XFS_ERROR(ERANGE);
else
error = -context.count;
} else
ASSERT(error >= 0);
ASSERT(error >= 0);
return error;
}
@ -2357,12 +2313,7 @@ xfs_attr_trace_enter(int type, char *where,
(void *)((__psunsigned_t)context->bufsize),
(void *)((__psunsigned_t)context->count),
(void *)((__psunsigned_t)context->firstu),
(void *)((__psunsigned_t)
(((context->count > 0) &&
!(context->flags & (ATTR_KERNAMELS|ATTR_KERNOVAL)))
? (ATTR_ENTRY(context->alist,
context->count-1)->a_valuelen)
: 0)),
NULL,
(void *)((__psunsigned_t)context->dupcnt),
(void *)((__psunsigned_t)context->flags),
(void *)a13, (void *)a14, (void *)a15);

55
fs/xfs/xfs_attr.h
View file

@ -18,9 +18,11 @@
#ifndef __XFS_ATTR_H__
#define __XFS_ATTR_H__
struct xfs_inode;
struct xfs_da_args;
struct xfs_attr_list_context;
/*
* xfs_attr.h
*
* 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
@ -35,17 +37,6 @@
* External interfaces
*========================================================================*/
struct cred;
struct xfs_attr_list_context;
typedef struct attrnames {
char * attr_name;
unsigned int attr_namelen;
} attrnames_t;
extern struct attrnames attr_user;
extern struct attrnames attr_secure;
extern struct attrnames attr_trusted;
#define ATTR_DONTFOLLOW 0x0001 /* -- unused, from IRIX -- */
#define ATTR_ROOT 0x0002 /* use attrs in root (trusted) namespace */
@ -54,14 +45,8 @@ extern struct attrnames attr_trusted;
#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_KERNACCESS 0x0400 /* [kernel] iaccess, inode held io-locked */
#define ATTR_KERNOTIME 0x1000 /* [kernel] don't update inode timestamps */
#define ATTR_KERNOVAL 0x2000 /* [kernel] get attr size only, not value */
#define ATTR_KERNAMELS 0x4000 /* [kernel] list attr names (simple list) */
#define ATTR_KERNORMALS 0x0800 /* [kernel] normal attr list: user+secure */
#define ATTR_KERNROOTLS 0x8000 /* [kernel] include root in the attr list */
#define ATTR_KERNFULLS (ATTR_KERNORMALS|ATTR_KERNROOTLS)
/*
* The maximum size (into the kernel or returned from the kernel) of an
@ -129,20 +114,40 @@ typedef struct attrlist_cursor_kern {
/*========================================================================
* Function prototypes for the kernel.
* Structure used to pass context around among the routines.
*========================================================================*/
struct xfs_inode;
struct attrlist_cursor_kern;
struct xfs_da_args;
typedef int (*put_listent_func_t)(struct xfs_attr_list_context *, int,
char *, int, int, 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? */
int 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_shortform_getvalue(struct xfs_da_args *);
int xfs_attr_fetch(struct xfs_inode *, struct xfs_name *, char *, int *, int);
int xfs_attr_rmtval_get(struct xfs_da_args *args);
int xfs_attr_list_int(struct xfs_attr_list_context *);
#endif /* __XFS_ATTR_H__ */

61
fs/xfs/xfs_attr_leaf.c
View file

@ -94,13 +94,6 @@ STATIC int xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index);
* Namespace helper routines
*========================================================================*/
STATIC_INLINE attrnames_t *
xfs_attr_flags_namesp(int flags)
{
return ((flags & XFS_ATTR_SECURE) ? &attr_secure:
((flags & XFS_ATTR_ROOT) ? &attr_trusted : &attr_user));
}
/*
* If namespace bits don't match return 0.
* If all match then return 1.
@ -111,25 +104,6 @@ xfs_attr_namesp_match(int arg_flags, int ondisk_flags)
return XFS_ATTR_NSP_ONDISK(ondisk_flags) == XFS_ATTR_NSP_ARGS_TO_ONDISK(arg_flags);
}
/*
* If namespace bits don't match and we don't have an override for it
* then return 0.
* If all match or are overridable then return 1.
*/
STATIC_INLINE int
xfs_attr_namesp_match_overrides(int arg_flags, int ondisk_flags)
{
if (((arg_flags & ATTR_SECURE) == 0) !=
((ondisk_flags & XFS_ATTR_SECURE) == 0) &&
!(arg_flags & ATTR_KERNORMALS))
return 0;
if (((arg_flags & ATTR_ROOT) == 0) !=
((ondisk_flags & XFS_ATTR_ROOT) == 0) &&
!(arg_flags & ATTR_KERNROOTLS))
return 0;
return 1;
}
/*========================================================================
* External routines when attribute fork size < XFS_LITINO(mp).
@ -626,15 +600,8 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context)
(XFS_ISRESET_CURSOR(cursor) &&
(dp->i_afp->if_bytes + sf->hdr.count * 16) < context->bufsize)) {
for (i = 0, sfe = &sf->list[0]; i < sf->hdr.count; i++) {
attrnames_t *namesp;
if (!xfs_attr_namesp_match_overrides(context->flags, sfe->flags)) {
sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
continue;
}
namesp = xfs_attr_flags_namesp(sfe->flags);
error = context->put_listent(context,
namesp,
sfe->flags,
(char *)sfe->nameval,
(int)sfe->namelen,
(int)sfe->valuelen,
@ -681,10 +648,7 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context)
kmem_free(sbuf);
return XFS_ERROR(EFSCORRUPTED);
}
if (!xfs_attr_namesp_match_overrides(context->flags, sfe->flags)) {
sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
continue;
}
sbp->entno = i;
sbp->hash = xfs_da_hashname((char *)sfe->nameval, sfe->namelen);
sbp->name = (char *)sfe->nameval;
@ -728,16 +692,12 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context)
* Loop putting entries into the user buffer.
*/
for ( ; i < nsbuf; i++, sbp++) {
attrnames_t *namesp;
namesp = xfs_attr_flags_namesp(sbp->flags);
if (cursor->hashval != sbp->hash) {
cursor->hashval = sbp->hash;
cursor->offset = 0;
}
error = context->put_listent(context,
namesp,
sbp->flags,
sbp->name,
sbp->namelen,
sbp->valuelen,
@ -2402,8 +2362,6 @@ xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context)
*/
retval = 0;
for ( ; (i < be16_to_cpu(leaf->hdr.count)); entry++, i++) {
attrnames_t *namesp;
if (be32_to_cpu(entry->hashval) != cursor->hashval) {
cursor->hashval = be32_to_cpu(entry->hashval);
cursor->offset = 0;
@ -2411,17 +2369,13 @@ xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context)
if (entry->flags & XFS_ATTR_INCOMPLETE)
continue; /* skip incomplete entries */
if (!xfs_attr_namesp_match_overrides(context->flags, entry->flags))
continue;
namesp = xfs_attr_flags_namesp(entry->flags);
if (entry->flags & XFS_ATTR_LOCAL) {
xfs_attr_leaf_name_local_t *name_loc =
XFS_ATTR_LEAF_NAME_LOCAL(leaf, i);
retval = context->put_listent(context,
namesp,
entry->flags,
(char *)name_loc->nameval,
(int)name_loc->namelen,
be16_to_cpu(name_loc->valuelen),
@ -2448,16 +2402,15 @@ xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context)
if (retval)
return retval;
retval = context->put_listent(context,
namesp,
entry->flags,
(char *)name_rmt->name,
(int)name_rmt->namelen,
valuelen,
(char*)args.value);
kmem_free(args.value);
}
else {
} else {
retval = context->put_listent(context,
namesp,
entry->flags,
(char *)name_rmt->name,
(int)name_rmt->namelen,
valuelen,

29
fs/xfs/xfs_attr_leaf.h
View file

@ -30,7 +30,7 @@
struct attrlist;
struct attrlist_cursor_kern;
struct attrnames;
struct xfs_attr_list_context;
struct xfs_dabuf;
struct xfs_da_args;
struct xfs_da_state;
@ -204,33 +204,6 @@ static inline int xfs_attr_leaf_entsize_local_max(int bsize)
return (((bsize) >> 1) + ((bsize) >> 2));
}
/*========================================================================
* Structure used to pass context around among the routines.
*========================================================================*/
struct xfs_attr_list_context;
typedef int (*put_listent_func_t)(struct xfs_attr_list_context *, struct attrnames *,
char *, int, int, char *);
typedef struct xfs_attr_list_context {
struct xfs_inode *dp; /* inode */
struct attrlist_cursor_kern *cursor; /* position in list */
struct attrlist *alist; /* output buffer */
int seen_enough; /* T/F: seen enough of list? */
int 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;
/*
* Used to keep a list of "remote value" extents when unlinking an inode.
*/