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Implement list of EA return functionality.

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Correctly delete EA's when the content length is set to zero.

Sponsored by:	DARPA & NAI Labs.
This commit is contained in:
Poul-Henning Kamp 2002-08-20 11:34:58 +00:00
parent 8453c174a1
commit 7428de69d2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=102175
1 changed files with 33 additions and 9 deletions
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42
sys/ufs/ffs/ffs_vnops.c
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@ -1396,9 +1396,10 @@ vop_getextattr {
{
struct inode *ip;
struct fs *fs;
u_char *eae, *p;
u_char *eae, *p, *pe, *pn;
struct ufs2_dinode *dp;
unsigned easize;
uint32_t ul;
int error, ealen;
ip = VTOI(ap->a_vp);
@ -1412,15 +1413,38 @@ vop_getextattr {
if (error)
return (error);
easize = dp->di_extsize;
error = ENOATTR;
ealen = ffs_findextattr(eae, easize,
ap->a_attrnamespace, ap->a_name, NULL, &p);
if (ealen != 0) {
if (strlen(ap->a_name) > 0) {
error = ENOATTR;
ealen = ffs_findextattr(eae, easize,
ap->a_attrnamespace, ap->a_name, NULL, &p);
if (ealen != 0) {
error = 0;
if (ap->a_size != NULL)
*ap->a_size = ealen;
else if (ap->a_uio != NULL)
error = uiomove(p, ealen, ap->a_uio);
}
} else {
error = 0;
if (ap->a_size != NULL)
*ap->a_size = ealen;
else if (ap->a_uio != NULL)
error = uiomove(p, ealen, ap->a_uio);
*ap->a_size = 0;
pe = eae + easize;
for(p = eae; error == 0 && p < pe; p = pn) {
bcopy(p, &ul, sizeof(ul));
pn = p + ul;
if (pn > pe)
break;
p += sizeof(ul);
if (*p++ != ap->a_attrnamespace)
continue;
p++; /* pad2 */
ealen = *p;
if (ap->a_size != NULL) {
*ap->a_size += ealen + 1;
} else if (ap->a_uio != NULL) {
error = uiomove(p, ealen + 1, ap->a_uio);
}
}
}
free(eae, M_TEMP);
return(error);
@ -1465,7 +1489,7 @@ vop_setextattr {
dp = ip->i_din2;
/* Calculate the length of the EA entry */
if (ap->a_uio == NULL) {
if (ap->a_uio == NULL || ap->a_uio->uio_resid == 0) {
/* delete */
ealength = eapad1 = ealen = eapad2 = eacont = 0;
} else {