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Fix memory leak when we discard a voided setattr operation

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This commit is contained in:
manu 2012-06-14 05:58:22 +00:00
parent 78c0e4f5d2
commit 574c09729f
1 changed files with 85 additions and 74 deletions
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159
lib/libperfuse/ops.c
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@ -1,4 +1,4 @@
/* $NetBSD: ops.c,v 1.56 2012/06/13 01:45:56 manu Exp $ */
/* $NetBSD: ops.c,v 1.57 2012/06/14 05:58:22 manu Exp $ */
/*-
* Copyright (c) 2010-2011 Emmanuel Dreyfus. All rights reserved.
@ -1696,6 +1696,7 @@ perfuse_node_setattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc,
struct fuse_attr_out *fao;
struct vattr *old_va;
int error;
int valid;
#ifdef PERFUSE_DEBUG
struct vattr *old_vap;
int resize_debug = 0;
@ -1719,39 +1720,94 @@ perfuse_node_setattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc,
}
old_va = puffs_pn_getvap((struct puffs_node *)opc);
valid = 0;
/*
* Check for permission to change size
*/
if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) &&
(error = mode_access(opc, pcr, PUFFS_VWRITE)) != 0)
return error;
/*
* Check for permission to change dates
*/
if (((vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL) ||
(vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL)) &&
(puffs_access_times(old_va->va_uid, old_va->va_gid,
old_va->va_mode, 0, pcr) != 0))
return EACCES;
if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL)) {
if ((error = mode_access(opc, pcr, PUFFS_VWRITE)) != 0)
return error;
valid |= FUSE_FATTR_SIZE;
}
/*
* Check for permission to change owner and group
*/
if (((vap->va_uid != (uid_t)PUFFS_VNOVAL) ||
(vap->va_gid != (gid_t)PUFFS_VNOVAL)) &&
(puffs_access_chown(old_va->va_uid, old_va->va_gid,
vap->va_uid, vap->va_gid, pcr)) != 0)
return EACCES;
if ((vap->va_uid != (uid_t)PUFFS_VNOVAL) ||
(vap->va_gid != (gid_t)PUFFS_VNOVAL)) {
if (puffs_access_chown(old_va->va_uid, old_va->va_gid,
vap->va_uid, vap->va_gid, pcr) != 0)
return EACCES;
if (vap->va_uid != (uid_t)PUFFS_VNOVAL)
valid |= FUSE_FATTR_UID;
if (vap->va_gid != (uid_t)PUFFS_VNOVAL)
valid |= FUSE_FATTR_GID;
}
/*
* Check for permission to change permissions
*/
if ((vap->va_mode != (mode_t)PUFFS_VNOVAL) &&
(puffs_access_chmod(old_va->va_uid, old_va->va_gid,
old_va->va_type, vap->va_mode, pcr)) != 0)
return EACCES;
if (vap->va_mode != (mode_t)PUFFS_VNOVAL) {
if (puffs_access_chmod(old_va->va_uid, old_va->va_gid,
old_va->va_type, vap->va_mode, pcr) != 0)
return EACCES;
valid |= FUSE_FATTR_MODE;
}
/*
* Check for permission to change dates
*/
if ((vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL) ||
(vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL)) {
if (vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL)
valid |= FUSE_FATTR_ATIME;
if (vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL)
valid |= FUSE_FATTR_MTIME;
/*
* ftruncate() sends only va_size, and metadata cache
* flush adds va_atime and va_mtime. Some FUSE
* filesystems will attempt to detect ftruncate by
* checking for FATTR_SIZE being set without
* FATTR_UID|FATTR_GID|FATTR_ATIME|FATTR_MTIME|FATTR_MODE
*
* Try to adapt and remove FATTR_ATIME|FATTR_MTIME
* if we suspect a ftruncate().
*/
if ((valid & FUSE_FATTR_SIZE) &&
!(valid & (FUSE_FATTR_UID|FUSE_FATTR_GID|FUSE_FATTR_MODE)))
valid &= ~(FUSE_FATTR_ATIME|FUSE_FATTR_MTIME);
/*
* There is the same mess with fchmod()
*/
if ((valid & FUSE_FATTR_MODE) &&
!(valid & (FUSE_FATTR_UID|FUSE_FATTR_GID)))
valid &= ~(FUSE_FATTR_ATIME|FUSE_FATTR_MTIME);
/*
* And if a change on atime/mtime remains, check permissions.
*/
if ((valid & (FUSE_FATTR_ATIME|FUSE_FATTR_MTIME)) &&
(puffs_access_times(old_va->va_uid, old_va->va_gid,
old_va->va_mode, 0, pcr) != 0))
return EACCES;
}
/*
* If nothing remain, discard the operation. This happend when
* only ctime is changed.
*/
if (!(valid & (FUSE_FATTR_SIZE|FUSE_FATTR_ATIME|FUSE_FATTR_MTIME|
FUSE_FATTR_MODE|FUSE_FATTR_UID|FUSE_FATTR_GID))) {
error = 0;
goto out;
}
pm = ps->ps_new_msg(pu, opc, FUSE_SETATTR, sizeof(*fsi), pcr);
fsi = GET_INPAYLOAD(ps, pm, fuse_setattr_in);
@ -1766,7 +1822,7 @@ perfuse_node_setattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc,
fsi->valid |= FUSE_FATTR_FH;
}
if (vap->va_size != (u_quad_t)PUFFS_VNOVAL) {
if (valid & FUSE_FATTR_SIZE) {
fsi->size = vap->va_size;
fsi->valid |= FUSE_FATTR_SIZE;
@ -1787,10 +1843,8 @@ perfuse_node_setattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc,
* dates being reset to Epoch on glusterfs. If one
* is missing, use the old value.
*/
if ((vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL) ||
(vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL)) {
if (vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL) {
if (valid & (FUSE_FATTR_ATIME|FUSE_FATTR_MTIME)) {
if (valid & FUSE_FATTR_ATIME) {
fsi->atime = vap->va_atime.tv_sec;
fsi->atimensec = (uint32_t)vap->va_atime.tv_nsec;
} else {
@ -1798,7 +1852,7 @@ perfuse_node_setattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc,
fsi->atimensec = (uint32_t)old_va->va_atime.tv_nsec;
}
if (vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL) {
if (valid & FUSE_FATTR_MTIME) {
fsi->mtime = vap->va_mtime.tv_sec;
fsi->mtimensec = (uint32_t)vap->va_mtime.tv_nsec;
} else {
@ -1809,17 +1863,17 @@ perfuse_node_setattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc,
fsi->valid |= (FUSE_FATTR_MTIME|FUSE_FATTR_ATIME);
}
if (vap->va_mode != (mode_t)PUFFS_VNOVAL) {
if (valid & FUSE_FATTR_MODE) {
fsi->mode = vap->va_mode;
fsi->valid |= FUSE_FATTR_MODE;
}
if (vap->va_uid != (uid_t)PUFFS_VNOVAL) {
if (valid & FUSE_FATTR_UID) {
fsi->uid = vap->va_uid;
fsi->valid |= FUSE_FATTR_UID;
}
if (vap->va_gid != (gid_t)PUFFS_VNOVAL) {
if (valid & FUSE_FATTR_GID) {
fsi->gid = vap->va_gid;
fsi->valid |= FUSE_FATTR_GID;
}
@ -1829,49 +1883,6 @@ perfuse_node_setattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc,
fsi->valid |= FUSE_FATTR_LOCKOWNER;
}
/*
* ftruncate() sends only va_size, and metadata cache
* flush adds va_atime and va_mtime. Some FUSE
* filesystems will attempt to detect ftruncate by
* checking for FATTR_SIZE being set without
* FATTR_UID|FATTR_GID|FATTR_ATIME|FATTR_MTIME|FATTR_MODE
*
* Try to adapt and remove FATTR_ATIME|FATTR_MTIME
* if we suspect a ftruncate().
*/
if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) &&
((vap->va_mode == (mode_t)PUFFS_VNOVAL) &&
(vap->va_uid == (uid_t)PUFFS_VNOVAL) &&
(vap->va_gid == (gid_t)PUFFS_VNOVAL))) {
fsi->atime = 0;
fsi->atimensec = 0;
fsi->mtime = 0;
fsi->mtimensec = 0;
fsi->valid &= ~(FUSE_FATTR_ATIME|FUSE_FATTR_MTIME);
}
/*
* There is the same mess with fchmod()
*/
if ((vap->va_mode != (mode_t)PUFFS_VNOVAL) &&
(vap->va_uid == (uid_t)PUFFS_VNOVAL) &&
(vap->va_gid == (gid_t)PUFFS_VNOVAL)) {
fsi->atime = 0;
fsi->atimensec = 0;
fsi->mtime = 0;
fsi->mtimensec = 0;
fsi->valid &= ~(FUSE_FATTR_ATIME|FUSE_FATTR_MTIME);
}
/*
* If nothing remain, discard the operation.
*/
if (!(fsi->valid & (FUSE_FATTR_SIZE|FUSE_FATTR_ATIME|FUSE_FATTR_MTIME|
FUSE_FATTR_MODE|FUSE_FATTR_UID|FUSE_FATTR_GID))) {
ps->ps_destroy_msg(pm);
error = 0;
goto out;
}
#ifdef PERFUSE_DEBUG
old_vap = puffs_pn_getvap((struct puffs_node *)opc);