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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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139
fs/xfs/xfs_attr.c
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@@ -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);