diff options
Diffstat (limited to 'fs/aufs/debug.c')
| -rw-r--r-- | fs/aufs/debug.c | 440 |
1 files changed, 0 insertions, 440 deletions
diff --git a/fs/aufs/debug.c b/fs/aufs/debug.c deleted file mode 100644 index a1154d6de..000000000 --- a/fs/aufs/debug.c +++ /dev/null @@ -1,440 +0,0 @@ -/* - * Copyright (C) 2005-2015 Junjiro R. Okajima - * - * This program, aufs is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -/* - * debug print functions - */ - -#include "aufs.h" - -/* Returns 0, or -errno. arg is in kp->arg. */ -static int param_atomic_t_set(const char *val, const struct kernel_param *kp) -{ - int err, n; - - err = kstrtoint(val, 0, &n); - if (!err) { - if (n > 0) - au_debug_on(); - else - au_debug_off(); - } - return err; -} - -/* Returns length written or -errno. Buffer is 4k (ie. be short!) */ -static int param_atomic_t_get(char *buffer, const struct kernel_param *kp) -{ - atomic_t *a; - - a = kp->arg; - return sprintf(buffer, "%d", atomic_read(a)); -} - -static struct kernel_param_ops param_ops_atomic_t = { - .set = param_atomic_t_set, - .get = param_atomic_t_get - /* void (*free)(void *arg) */ -}; - -atomic_t aufs_debug = ATOMIC_INIT(0); -MODULE_PARM_DESC(debug, "debug print"); -module_param_named(debug, aufs_debug, atomic_t, S_IRUGO | S_IWUSR | S_IWGRP); - -DEFINE_MUTEX(au_dbg_mtx); /* just to serialize the dbg msgs */ -char *au_plevel = KERN_DEBUG; -#define dpri(fmt, ...) do { \ - if ((au_plevel \ - && strcmp(au_plevel, KERN_DEBUG)) \ - || au_debug_test()) \ - printk("%s" fmt, au_plevel, ##__VA_ARGS__); \ -} while (0) - -/* ---------------------------------------------------------------------- */ - -void au_dpri_whlist(struct au_nhash *whlist) -{ - unsigned long ul, n; - struct hlist_head *head; - struct au_vdir_wh *pos; - - n = whlist->nh_num; - head = whlist->nh_head; - for (ul = 0; ul < n; ul++) { - hlist_for_each_entry(pos, head, wh_hash) - dpri("b%d, %.*s, %d\n", - pos->wh_bindex, - pos->wh_str.len, pos->wh_str.name, - pos->wh_str.len); - head++; - } -} - -void au_dpri_vdir(struct au_vdir *vdir) -{ - unsigned long ul; - union au_vdir_deblk_p p; - unsigned char *o; - - if (!vdir || IS_ERR(vdir)) { - dpri("err %ld\n", PTR_ERR(vdir)); - return; - } - - dpri("deblk %u, nblk %lu, deblk %p, last{%lu, %p}, ver %lu\n", - vdir->vd_deblk_sz, vdir->vd_nblk, vdir->vd_deblk, - vdir->vd_last.ul, vdir->vd_last.p.deblk, vdir->vd_version); - for (ul = 0; ul < vdir->vd_nblk; ul++) { - p.deblk = vdir->vd_deblk[ul]; - o = p.deblk; - dpri("[%lu]: %p\n", ul, o); - } -} - -static int do_pri_inode(aufs_bindex_t bindex, struct inode *inode, int hn, - struct dentry *wh) -{ - char *n = NULL; - int l = 0; - - if (!inode || IS_ERR(inode)) { - dpri("i%d: err %ld\n", bindex, PTR_ERR(inode)); - return -1; - } - - /* the type of i_blocks depends upon CONFIG_LBDAF */ - BUILD_BUG_ON(sizeof(inode->i_blocks) != sizeof(unsigned long) - && sizeof(inode->i_blocks) != sizeof(u64)); - if (wh) { - n = (void *)wh->d_name.name; - l = wh->d_name.len; - } - - dpri("i%d: %p, i%lu, %s, cnt %d, nl %u, 0%o, sz %llu, blk %llu," - " hn %d, ct %lld, np %lu, st 0x%lx, f 0x%x, v %llu, g %x%s%.*s\n", - bindex, inode, - inode->i_ino, inode->i_sb ? au_sbtype(inode->i_sb) : "??", - atomic_read(&inode->i_count), inode->i_nlink, inode->i_mode, - i_size_read(inode), (unsigned long long)inode->i_blocks, - hn, (long long)timespec_to_ns(&inode->i_ctime) & 0x0ffff, - inode->i_mapping ? inode->i_mapping->nrpages : 0, - inode->i_state, inode->i_flags, inode->i_version, - inode->i_generation, - l ? ", wh " : "", l, n); - return 0; -} - -void au_dpri_inode(struct inode *inode) -{ - struct au_iinfo *iinfo; - aufs_bindex_t bindex; - int err, hn; - - err = do_pri_inode(-1, inode, -1, NULL); - if (err || !au_test_aufs(inode->i_sb)) - return; - - iinfo = au_ii(inode); - if (!iinfo) - return; - dpri("i-1: bstart %d, bend %d, gen %d\n", - iinfo->ii_bstart, iinfo->ii_bend, au_iigen(inode, NULL)); - if (iinfo->ii_bstart < 0) - return; - hn = 0; - for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend; bindex++) { - hn = !!au_hn(iinfo->ii_hinode + bindex); - do_pri_inode(bindex, iinfo->ii_hinode[0 + bindex].hi_inode, hn, - iinfo->ii_hinode[0 + bindex].hi_whdentry); - } -} - -void au_dpri_dalias(struct inode *inode) -{ - struct dentry *d; - - spin_lock(&inode->i_lock); - hlist_for_each_entry(d, &inode->i_dentry, d_u.d_alias) - au_dpri_dentry(d); - spin_unlock(&inode->i_lock); -} - -static int do_pri_dentry(aufs_bindex_t bindex, struct dentry *dentry) -{ - struct dentry *wh = NULL; - int hn; - struct au_iinfo *iinfo; - - if (!dentry || IS_ERR(dentry)) { - dpri("d%d: err %ld\n", bindex, PTR_ERR(dentry)); - return -1; - } - /* do not call dget_parent() here */ - /* note: access d_xxx without d_lock */ - dpri("d%d: %p, %pd2?, %s, cnt %d, flags 0x%x, %shashed\n", - bindex, dentry, dentry, - dentry->d_sb ? au_sbtype(dentry->d_sb) : "??", - au_dcount(dentry), dentry->d_flags, - d_unhashed(dentry) ? "un" : ""); - hn = -1; - if (bindex >= 0 - && d_is_positive(dentry) - && au_test_aufs(dentry->d_sb)) { - iinfo = au_ii(d_inode(dentry)); - if (iinfo) { - hn = !!au_hn(iinfo->ii_hinode + bindex); - wh = iinfo->ii_hinode[0 + bindex].hi_whdentry; - } - } - do_pri_inode(bindex, d_inode(dentry), hn, wh); - return 0; -} - -void au_dpri_dentry(struct dentry *dentry) -{ - struct au_dinfo *dinfo; - aufs_bindex_t bindex; - int err; - struct au_hdentry *hdp; - - err = do_pri_dentry(-1, dentry); - if (err || !au_test_aufs(dentry->d_sb)) - return; - - dinfo = au_di(dentry); - if (!dinfo) - return; - dpri("d-1: bstart %d, bend %d, bwh %d, bdiropq %d, gen %d, tmp %d\n", - dinfo->di_bstart, dinfo->di_bend, - dinfo->di_bwh, dinfo->di_bdiropq, au_digen(dentry), - dinfo->di_tmpfile); - if (dinfo->di_bstart < 0) - return; - hdp = dinfo->di_hdentry; - for (bindex = dinfo->di_bstart; bindex <= dinfo->di_bend; bindex++) - do_pri_dentry(bindex, hdp[0 + bindex].hd_dentry); -} - -static int do_pri_file(aufs_bindex_t bindex, struct file *file) -{ - char a[32]; - - if (!file || IS_ERR(file)) { - dpri("f%d: err %ld\n", bindex, PTR_ERR(file)); - return -1; - } - a[0] = 0; - if (bindex < 0 - && !IS_ERR_OR_NULL(file->f_path.dentry) - && au_test_aufs(file->f_path.dentry->d_sb) - && au_fi(file)) - snprintf(a, sizeof(a), ", gen %d, mmapped %d", - au_figen(file), atomic_read(&au_fi(file)->fi_mmapped)); - dpri("f%d: mode 0x%x, flags 0%o, cnt %ld, v %llu, pos %llu%s\n", - bindex, file->f_mode, file->f_flags, (long)file_count(file), - file->f_version, file->f_pos, a); - if (!IS_ERR_OR_NULL(file->f_path.dentry)) - do_pri_dentry(bindex, file->f_path.dentry); - return 0; -} - -void au_dpri_file(struct file *file) -{ - struct au_finfo *finfo; - struct au_fidir *fidir; - struct au_hfile *hfile; - aufs_bindex_t bindex; - int err; - - err = do_pri_file(-1, file); - if (err - || IS_ERR_OR_NULL(file->f_path.dentry) - || !au_test_aufs(file->f_path.dentry->d_sb)) - return; - - finfo = au_fi(file); - if (!finfo) - return; - if (finfo->fi_btop < 0) - return; - fidir = finfo->fi_hdir; - if (!fidir) - do_pri_file(finfo->fi_btop, finfo->fi_htop.hf_file); - else - for (bindex = finfo->fi_btop; - bindex >= 0 && bindex <= fidir->fd_bbot; - bindex++) { - hfile = fidir->fd_hfile + bindex; - do_pri_file(bindex, hfile ? hfile->hf_file : NULL); - } -} - -static int do_pri_br(aufs_bindex_t bindex, struct au_branch *br) -{ - struct vfsmount *mnt; - struct super_block *sb; - - if (!br || IS_ERR(br)) - goto out; - mnt = au_br_mnt(br); - if (!mnt || IS_ERR(mnt)) - goto out; - sb = mnt->mnt_sb; - if (!sb || IS_ERR(sb)) - goto out; - - dpri("s%d: {perm 0x%x, id %d, cnt %d, wbr %p}, " - "%s, dev 0x%02x%02x, flags 0x%lx, cnt %d, active %d, " - "xino %d\n", - bindex, br->br_perm, br->br_id, atomic_read(&br->br_count), - br->br_wbr, au_sbtype(sb), MAJOR(sb->s_dev), MINOR(sb->s_dev), - sb->s_flags, sb->s_count, - atomic_read(&sb->s_active), !!br->br_xino.xi_file); - return 0; - -out: - dpri("s%d: err %ld\n", bindex, PTR_ERR(br)); - return -1; -} - -void au_dpri_sb(struct super_block *sb) -{ - struct au_sbinfo *sbinfo; - aufs_bindex_t bindex; - int err; - /* to reuduce stack size */ - struct { - struct vfsmount mnt; - struct au_branch fake; - } *a; - - /* this function can be called from magic sysrq */ - a = kzalloc(sizeof(*a), GFP_ATOMIC); - if (unlikely(!a)) { - dpri("no memory\n"); - return; - } - - a->mnt.mnt_sb = sb; - a->fake.br_perm = 0; - a->fake.br_path.mnt = &a->mnt; - a->fake.br_xino.xi_file = NULL; - atomic_set(&a->fake.br_count, 0); - smp_mb(); /* atomic_set */ - err = do_pri_br(-1, &a->fake); - kfree(a); - dpri("dev 0x%x\n", sb->s_dev); - if (err || !au_test_aufs(sb)) - return; - - sbinfo = au_sbi(sb); - if (!sbinfo) - return; - dpri("nw %d, gen %u, kobj %d\n", - atomic_read(&sbinfo->si_nowait.nw_len), sbinfo->si_generation, - atomic_read(&sbinfo->si_kobj.kref.refcount)); - for (bindex = 0; bindex <= sbinfo->si_bend; bindex++) - do_pri_br(bindex, sbinfo->si_branch[0 + bindex]); -} - -/* ---------------------------------------------------------------------- */ - -void __au_dbg_verify_dinode(struct dentry *dentry, const char *func, int line) -{ - struct inode *h_inode, *inode = d_inode(dentry); - struct dentry *h_dentry; - aufs_bindex_t bindex, bend, bi; - - if (!inode /* || au_di(dentry)->di_lsc == AuLsc_DI_TMP */) - return; - - bend = au_dbend(dentry); - bi = au_ibend(inode); - if (bi < bend) - bend = bi; - bindex = au_dbstart(dentry); - bi = au_ibstart(inode); - if (bi > bindex) - bindex = bi; - - for (; bindex <= bend; bindex++) { - h_dentry = au_h_dptr(dentry, bindex); - if (!h_dentry) - continue; - h_inode = au_h_iptr(inode, bindex); - if (unlikely(h_inode != d_inode(h_dentry))) { - au_debug_on(); - AuDbg("b%d, %s:%d\n", bindex, func, line); - AuDbgDentry(dentry); - AuDbgInode(inode); - au_debug_off(); - BUG(); - } - } -} - -void au_dbg_verify_gen(struct dentry *parent, unsigned int sigen) -{ - int err, i, j; - struct au_dcsub_pages dpages; - struct au_dpage *dpage; - struct dentry **dentries; - - err = au_dpages_init(&dpages, GFP_NOFS); - AuDebugOn(err); - err = au_dcsub_pages_rev_aufs(&dpages, parent, /*do_include*/1); - AuDebugOn(err); - for (i = dpages.ndpage - 1; !err && i >= 0; i--) { - dpage = dpages.dpages + i; - dentries = dpage->dentries; - for (j = dpage->ndentry - 1; !err && j >= 0; j--) - AuDebugOn(au_digen_test(dentries[j], sigen)); - } - au_dpages_free(&dpages); -} - -void au_dbg_verify_kthread(void) -{ - if (au_wkq_test()) { - au_dbg_blocked(); - /* - * It may be recursive, but udba=notify between two aufs mounts, - * where a single ro branch is shared, is not a problem. - */ - /* WARN_ON(1); */ - } -} - -/* ---------------------------------------------------------------------- */ - -int __init au_debug_init(void) -{ - aufs_bindex_t bindex; - struct au_vdir_destr destr; - - bindex = -1; - AuDebugOn(bindex >= 0); - - destr.len = -1; - AuDebugOn(destr.len < NAME_MAX); - -#ifdef CONFIG_4KSTACKS - pr_warn("CONFIG_4KSTACKS is defined.\n"); -#endif - - return 0; -} |