[XFS] Switches xfs_vn_listxattr to set it's put_listent callback directly
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
Niv Sardi
Родитель
caf8aabdbc
Коммит
ad9b463aa2
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@ -341,8 +341,7 @@ xfs_acl_iaccess(
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/* If the file has no ACL return -1. */
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rval = sizeof(xfs_acl_t);
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if (xfs_attr_fetch(ip, &acl_name, (char *)acl, &rval,
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ATTR_ROOT | ATTR_KERNACCESS)) {
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if (xfs_attr_fetch(ip, &acl_name, (char *)acl, &rval, ATTR_ROOT)) {
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_ACL_FREE(acl);
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return -1;
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}
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@ -16,8 +16,6 @@
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/capability.h>
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_types.h"
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@ -607,12 +605,20 @@ xfs_attr_remove(
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return xfs_attr_remove_int(dp, &xname, flags);
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}
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STATIC int
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int
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xfs_attr_list_int(xfs_attr_list_context_t *context)
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{
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int error;
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xfs_inode_t *dp = context->dp;
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XFS_STATS_INC(xs_attr_list);
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if (XFS_FORCED_SHUTDOWN(dp->i_mount))
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return EIO;
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xfs_ilock(dp, XFS_ILOCK_SHARED);
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xfs_attr_trace_l_c("syscall start", context);
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/*
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* Decide on what work routines to call based on the inode size.
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*/
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@ -625,6 +631,10 @@ xfs_attr_list_int(xfs_attr_list_context_t *context)
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} else {
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error = xfs_attr_node_list(context);
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}
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xfs_iunlock(dp, XFS_ILOCK_SHARED);
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xfs_attr_trace_l_c("syscall end", context);
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return error;
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}
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@ -641,74 +651,50 @@ xfs_attr_list_int(xfs_attr_list_context_t *context)
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*/
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/*ARGSUSED*/
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STATIC int
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xfs_attr_put_listent(xfs_attr_list_context_t *context, attrnames_t *namesp,
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xfs_attr_put_listent(xfs_attr_list_context_t *context, int flags,
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char *name, int namelen,
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int valuelen, char *value)
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{
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struct attrlist *alist = (struct attrlist *)context->alist;
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attrlist_ent_t *aep;
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int arraytop;
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ASSERT(!(context->flags & ATTR_KERNOVAL));
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ASSERT(context->count >= 0);
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ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
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ASSERT(context->firstu >= sizeof(*context->alist));
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ASSERT(context->firstu >= sizeof(*alist));
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ASSERT(context->firstu <= context->bufsize);
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arraytop = sizeof(*context->alist) +
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context->count * sizeof(context->alist->al_offset[0]);
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/*
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* Only list entries in the right namespace.
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*/
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if (((context->flags & ATTR_SECURE) == 0) !=
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((flags & XFS_ATTR_SECURE) == 0))
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return 0;
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if (((context->flags & ATTR_ROOT) == 0) !=
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((flags & XFS_ATTR_ROOT) == 0))
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return 0;
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arraytop = sizeof(*alist) +
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context->count * sizeof(alist->al_offset[0]);
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context->firstu -= ATTR_ENTSIZE(namelen);
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if (context->firstu < arraytop) {
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xfs_attr_trace_l_c("buffer full", context);
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context->alist->al_more = 1;
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alist->al_more = 1;
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context->seen_enough = 1;
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return 1;
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}
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aep = (attrlist_ent_t *)&(((char *)context->alist)[ context->firstu ]);
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aep = (attrlist_ent_t *)&context->alist[context->firstu];
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aep->a_valuelen = valuelen;
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memcpy(aep->a_name, name, namelen);
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aep->a_name[namelen] = 0;
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context->alist->al_offset[ context->count++ ] = context->firstu;
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context->alist->al_count = context->count;
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alist->al_offset[context->count++] = context->firstu;
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alist->al_count = context->count;
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xfs_attr_trace_l_c("add", context);
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return 0;
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}
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STATIC int
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xfs_attr_kern_list(xfs_attr_list_context_t *context, attrnames_t *namesp,
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char *name, int namelen,
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int valuelen, char *value)
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{
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char *offset;
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int arraytop;
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ASSERT(context->count >= 0);
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arraytop = context->count + namesp->attr_namelen + namelen + 1;
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if (arraytop > context->firstu) {
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context->count = -1; /* insufficient space */
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return 1;
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}
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offset = (char *)context->alist + context->count;
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strncpy(offset, namesp->attr_name, namesp->attr_namelen);
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offset += namesp->attr_namelen;
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strncpy(offset, name, namelen); /* real name */
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offset += namelen;
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*offset = '\0';
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context->count += namesp->attr_namelen + namelen + 1;
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return 0;
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}
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/*ARGSUSED*/
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STATIC int
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xfs_attr_kern_list_sizes(xfs_attr_list_context_t *context, attrnames_t *namesp,
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char *name, int namelen,
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int valuelen, char *value)
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{
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context->count += namesp->attr_namelen + namelen + 1;
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return 0;
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}
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/*
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* Generate a list of extended attribute names and optionally
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* also value lengths. Positive return value follows the XFS
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@ -725,10 +711,9 @@ xfs_attr_list(
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attrlist_cursor_kern_t *cursor)
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{
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xfs_attr_list_context_t context;
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struct attrlist *alist;
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int error;
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XFS_STATS_INC(xs_attr_list);
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/*
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* Validate the cursor.
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*/
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@ -749,52 +734,23 @@ xfs_attr_list(
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/*
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* Initialize the output buffer.
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*/
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memset(&context, 0, sizeof(context));
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context.dp = dp;
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context.cursor = cursor;
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context.count = 0;
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context.dupcnt = 0;
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context.resynch = 1;
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context.flags = flags;
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context.seen_enough = 0;
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context.alist = (attrlist_t *)buffer;
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context.put_value = 0;
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if (flags & ATTR_KERNAMELS) {
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context.bufsize = bufsize;
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context.firstu = context.bufsize;
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if (flags & ATTR_KERNOVAL)
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context.put_listent = xfs_attr_kern_list_sizes;
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else
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context.put_listent = xfs_attr_kern_list;
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} else {
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context.alist = buffer;
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context.bufsize = (bufsize & ~(sizeof(int)-1)); /* align */
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context.firstu = context.bufsize;
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context.alist->al_count = 0;
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context.alist->al_more = 0;
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context.alist->al_offset[0] = context.bufsize;
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context.put_listent = xfs_attr_put_listent;
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}
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if (XFS_FORCED_SHUTDOWN(dp->i_mount))
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return EIO;
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xfs_ilock(dp, XFS_ILOCK_SHARED);
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xfs_attr_trace_l_c("syscall start", &context);
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alist = (struct attrlist *)context.alist;
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alist->al_count = 0;
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alist->al_more = 0;
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alist->al_offset[0] = context.bufsize;
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error = xfs_attr_list_int(&context);
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xfs_iunlock(dp, XFS_ILOCK_SHARED);
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xfs_attr_trace_l_c("syscall end", &context);
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if (context.flags & (ATTR_KERNOVAL|ATTR_KERNAMELS)) {
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/* must return negated buffer size or the error */
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if (context.count < 0)
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error = XFS_ERROR(ERANGE);
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else
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error = -context.count;
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} else
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ASSERT(error >= 0);
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return error;
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}
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@ -2357,12 +2313,7 @@ xfs_attr_trace_enter(int type, char *where,
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(void *)((__psunsigned_t)context->bufsize),
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(void *)((__psunsigned_t)context->count),
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(void *)((__psunsigned_t)context->firstu),
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(void *)((__psunsigned_t)
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(((context->count > 0) &&
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!(context->flags & (ATTR_KERNAMELS|ATTR_KERNOVAL)))
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? (ATTR_ENTRY(context->alist,
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context->count-1)->a_valuelen)
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: 0)),
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NULL,
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(void *)((__psunsigned_t)context->dupcnt),
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(void *)((__psunsigned_t)context->flags),
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(void *)a13, (void *)a14, (void *)a15);
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@ -18,9 +18,11 @@
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#ifndef __XFS_ATTR_H__
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#define __XFS_ATTR_H__
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struct xfs_inode;
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struct xfs_da_args;
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struct xfs_attr_list_context;
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/*
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* xfs_attr.h
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*
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* Large attribute lists are structured around Btrees where all the data
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* elements are in the leaf nodes. Attribute names are hashed into an int,
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* then that int is used as the index into the Btree. Since the hashval
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@ -35,17 +37,6 @@
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* External interfaces
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*========================================================================*/
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struct cred;
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struct xfs_attr_list_context;
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typedef struct attrnames {
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char * attr_name;
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unsigned int attr_namelen;
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} attrnames_t;
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extern struct attrnames attr_user;
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extern struct attrnames attr_secure;
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extern struct attrnames attr_trusted;
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#define ATTR_DONTFOLLOW 0x0001 /* -- unused, from IRIX -- */
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#define ATTR_ROOT 0x0002 /* use attrs in root (trusted) namespace */
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@ -54,14 +45,8 @@ extern struct attrnames attr_trusted;
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#define ATTR_CREATE 0x0010 /* pure create: fail if attr already exists */
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#define ATTR_REPLACE 0x0020 /* pure set: fail if attr does not exist */
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#define ATTR_KERNACCESS 0x0400 /* [kernel] iaccess, inode held io-locked */
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#define ATTR_KERNOTIME 0x1000 /* [kernel] don't update inode timestamps */
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#define ATTR_KERNOVAL 0x2000 /* [kernel] get attr size only, not value */
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#define ATTR_KERNAMELS 0x4000 /* [kernel] list attr names (simple list) */
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#define ATTR_KERNORMALS 0x0800 /* [kernel] normal attr list: user+secure */
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#define ATTR_KERNROOTLS 0x8000 /* [kernel] include root in the attr list */
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#define ATTR_KERNFULLS (ATTR_KERNORMALS|ATTR_KERNROOTLS)
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/*
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* The maximum size (into the kernel or returned from the kernel) of an
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@ -129,20 +114,40 @@ typedef struct attrlist_cursor_kern {
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/*========================================================================
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* Function prototypes for the kernel.
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* Structure used to pass context around among the routines.
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*========================================================================*/
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struct xfs_inode;
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struct attrlist_cursor_kern;
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struct xfs_da_args;
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typedef int (*put_listent_func_t)(struct xfs_attr_list_context *, int,
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char *, int, int, char *);
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typedef struct xfs_attr_list_context {
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struct xfs_inode *dp; /* inode */
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struct attrlist_cursor_kern *cursor; /* position in list */
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char *alist; /* output buffer */
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int seen_enough; /* T/F: seen enough of list? */
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int count; /* num used entries */
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int dupcnt; /* count dup hashvals seen */
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int bufsize; /* total buffer size */
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int firstu; /* first used byte in buffer */
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int flags; /* from VOP call */
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int resynch; /* T/F: resynch with cursor */
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int put_value; /* T/F: need value for listent */
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put_listent_func_t put_listent; /* list output fmt function */
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int index; /* index into output buffer */
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} xfs_attr_list_context_t;
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/*========================================================================
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* Function prototypes for the kernel.
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*========================================================================*/
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/*
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* Overall external interface routines.
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*/
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int xfs_attr_inactive(struct xfs_inode *dp);
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int xfs_attr_shortform_getvalue(struct xfs_da_args *);
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int xfs_attr_fetch(struct xfs_inode *, struct xfs_name *, char *, int *, int);
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int xfs_attr_rmtval_get(struct xfs_da_args *args);
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int xfs_attr_list_int(struct xfs_attr_list_context *);
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#endif /* __XFS_ATTR_H__ */
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@ -94,13 +94,6 @@ STATIC int xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index);
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* Namespace helper routines
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*========================================================================*/
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STATIC_INLINE attrnames_t *
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xfs_attr_flags_namesp(int flags)
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{
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return ((flags & XFS_ATTR_SECURE) ? &attr_secure:
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((flags & XFS_ATTR_ROOT) ? &attr_trusted : &attr_user));
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}
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/*
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* If namespace bits don't match return 0.
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* If all match then return 1.
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@ -111,25 +104,6 @@ xfs_attr_namesp_match(int arg_flags, int ondisk_flags)
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return XFS_ATTR_NSP_ONDISK(ondisk_flags) == XFS_ATTR_NSP_ARGS_TO_ONDISK(arg_flags);
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}
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/*
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* If namespace bits don't match and we don't have an override for it
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* then return 0.
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* If all match or are overridable then return 1.
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*/
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STATIC_INLINE int
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xfs_attr_namesp_match_overrides(int arg_flags, int ondisk_flags)
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{
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if (((arg_flags & ATTR_SECURE) == 0) !=
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((ondisk_flags & XFS_ATTR_SECURE) == 0) &&
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!(arg_flags & ATTR_KERNORMALS))
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return 0;
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if (((arg_flags & ATTR_ROOT) == 0) !=
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((ondisk_flags & XFS_ATTR_ROOT) == 0) &&
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!(arg_flags & ATTR_KERNROOTLS))
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return 0;
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return 1;
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}
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/*========================================================================
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* External routines when attribute fork size < XFS_LITINO(mp).
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@ -626,15 +600,8 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context)
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(XFS_ISRESET_CURSOR(cursor) &&
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(dp->i_afp->if_bytes + sf->hdr.count * 16) < context->bufsize)) {
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for (i = 0, sfe = &sf->list[0]; i < sf->hdr.count; i++) {
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attrnames_t *namesp;
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if (!xfs_attr_namesp_match_overrides(context->flags, sfe->flags)) {
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sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
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continue;
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}
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namesp = xfs_attr_flags_namesp(sfe->flags);
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error = context->put_listent(context,
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namesp,
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sfe->flags,
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(char *)sfe->nameval,
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(int)sfe->namelen,
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(int)sfe->valuelen,
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@ -681,10 +648,7 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context)
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kmem_free(sbuf);
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return XFS_ERROR(EFSCORRUPTED);
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}
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if (!xfs_attr_namesp_match_overrides(context->flags, sfe->flags)) {
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sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
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continue;
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}
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sbp->entno = i;
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sbp->hash = xfs_da_hashname((char *)sfe->nameval, sfe->namelen);
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sbp->name = (char *)sfe->nameval;
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@ -728,16 +692,12 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context)
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* Loop putting entries into the user buffer.
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*/
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for ( ; i < nsbuf; i++, sbp++) {
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attrnames_t *namesp;
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namesp = xfs_attr_flags_namesp(sbp->flags);
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if (cursor->hashval != sbp->hash) {
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cursor->hashval = sbp->hash;
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cursor->offset = 0;
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}
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error = context->put_listent(context,
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namesp,
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sbp->flags,
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sbp->name,
|
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sbp->namelen,
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sbp->valuelen,
|
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|
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@ -2402,8 +2362,6 @@ xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context)
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*/
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retval = 0;
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for ( ; (i < be16_to_cpu(leaf->hdr.count)); entry++, i++) {
|
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attrnames_t *namesp;
|
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|
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if (be32_to_cpu(entry->hashval) != cursor->hashval) {
|
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cursor->hashval = be32_to_cpu(entry->hashval);
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cursor->offset = 0;
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@ -2411,17 +2369,13 @@ xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context)
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|||
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if (entry->flags & XFS_ATTR_INCOMPLETE)
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continue; /* skip incomplete entries */
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if (!xfs_attr_namesp_match_overrides(context->flags, entry->flags))
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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,
|
||||
|
|
|
|||
|
|
@ -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.
|
||||
*/
|
||||
|
|
|
|||
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