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Differential D21518 Diff 61647 head/sys/fs/pseudofs/pseudofs_vnops.c

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head/sys/fs/pseudofs/pseudofs_vnops.c

Show First 20 Lines • Show All 803 Lines • ▼ Show 20 Linespfs_readdir(struct vop_readdir_args *va)
offset = uio->uio_offset; offset = uio->uio_offset;
resid = uio->uio_resid; resid = uio->uio_resid;
if (offset < 0 || offset % PFS_DELEN != 0 || if (offset < 0 || offset % PFS_DELEN != 0 ||
(resid && resid < PFS_DELEN)) (resid && resid < PFS_DELEN))
PFS_RETURN (EINVAL); PFS_RETURN (EINVAL);
if (resid == 0) if (resid == 0)
PFS_RETURN (0); PFS_RETURN (0);
if (!pfs_lookup_proc(pid, &proc)) proc = NULL;
if (pid != NO_PID && !pfs_lookup_proc(pid, &proc))
PFS_RETURN (ENOENT); PFS_RETURN (ENOENT);
sx_slock(&allproc_lock); sx_slock(&allproc_lock);
pfs_lock(pd); pfs_lock(pd);
KASSERT(pid == NO_PID || proc != NULL,
("%s(): no process for pid %lu", __func__, (unsigned long)pid));
if (pid != NO_PID) {
PROC_LOCK(proc); PROC_LOCK(proc);
/* check if the directory is visible to the caller */ /* check if the directory is visible to the caller */
if (!pfs_visible_proc(curthread, pd, proc)) { if (!pfs_visible_proc(curthread, pd, proc)) {
_PRELE(proc); _PRELE(proc);
PROC_UNLOCK(proc); PROC_UNLOCK(proc);
sx_sunlock(&allproc_lock); sx_sunlock(&allproc_lock);
pfs_unlock(pd); pfs_unlock(pd);
PFS_RETURN (ENOENT); PFS_RETURN (ENOENT);
} }
KASSERT(pid == NO_PID || proc != NULL, }
("%s(): no process for pid %lu", __func__, (unsigned long)pid));
/* skip unwanted entries */ /* skip unwanted entries */
for (pn = NULL, p = NULL; offset > 0; offset -= PFS_DELEN) { for (pn = NULL, p = NULL; offset > 0; offset -= PFS_DELEN) {
if (pfs_iterate(curthread, proc, pd, &pn, &p) == -1) { if (pfs_iterate(curthread, proc, pd, &pn, &p) == -1) {
/* nothing left... */ /* nothing left... */
if (proc != NULL) { if (proc != NULL) {
_PRELE(proc); _PRELE(proc);
PROC_UNLOCK(proc); PROC_UNLOCK(proc);
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