diff options
Diffstat (limited to 'fs/ubifs/recovery.c')
| -rw-r--r-- | fs/ubifs/recovery.c | 34 |
1 files changed, 24 insertions, 10 deletions
diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c index 109c6ea03bb5..77e9b874b6c2 100644 --- a/fs/ubifs/recovery.c +++ b/fs/ubifs/recovery.c @@ -24,7 +24,7 @@ * This file implements functions needed to recover from unclean un-mounts. * When UBIFS is mounted, it checks a flag on the master node to determine if * an un-mount was completed successfully. If not, the process of mounting - * incorparates additional checking and fixing of on-flash data structures. + * incorporates additional checking and fixing of on-flash data structures. * UBIFS always cleans away all remnants of an unclean un-mount, so that * errors do not accumulate. However UBIFS defers recovery if it is mounted * read-only, and the flash is not modified in that case. @@ -292,7 +292,7 @@ int ubifs_recover_master_node(struct ubifs_info *c) memcpy(c->mst_node, mst, UBIFS_MST_NODE_SZ); - if ((c->vfs_sb->s_flags & MS_RDONLY)) { + if (c->ro_mount) { /* Read-only mode. Keep a copy for switching to rw mode */ c->rcvrd_mst_node = kmalloc(sz, GFP_KERNEL); if (!c->rcvrd_mst_node) { @@ -469,7 +469,7 @@ static int fix_unclean_leb(struct ubifs_info *c, struct ubifs_scan_leb *sleb, endpt = snod->offs + snod->len; } - if ((c->vfs_sb->s_flags & MS_RDONLY) && !c->remounting_rw) { + if (c->ro_mount && !c->remounting_rw) { /* Add to recovery list */ struct ubifs_unclean_leb *ucleb; @@ -772,7 +772,8 @@ out_free: * @sbuf: LEB-sized buffer to use * * This function does a scan of a LEB, but caters for errors that might have - * been caused by the unclean unmount from which we are attempting to recover. + * been caused by unclean reboots from which we are attempting to recover + * (assume that only the last log LEB can be corrupted by an unclean reboot). * * This function returns %0 on success and a negative error code on failure. */ @@ -883,7 +884,7 @@ int ubifs_recover_inl_heads(const struct ubifs_info *c, void *sbuf) { int err; - ubifs_assert(!(c->vfs_sb->s_flags & MS_RDONLY) || c->remounting_rw); + ubifs_assert(!c->ro_mount || c->remounting_rw); dbg_rcvry("checking index head at %d:%d", c->ihead_lnum, c->ihead_offs); err = recover_head(c, c->ihead_lnum, c->ihead_offs, sbuf); @@ -1063,8 +1064,21 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c) } err = ubifs_find_dirty_leb(c, &lp, wbuf->offs, 2); if (err) { - if (err == -ENOSPC) - dbg_err("could not find a dirty LEB"); + /* + * There are no dirty or empty LEBs subject to here being + * enough for the index. Try to use + * 'ubifs_find_free_leb_for_idx()', which will return any empty + * LEBs (ignoring index requirements). If the index then + * doesn't have enough LEBs the recovery commit will fail - + * which is the same result anyway i.e. recovery fails. So + * there is no problem ignoring index requirements and just + * grabbing a free LEB since we have already established there + * is not a dirty LEB we could have used instead. + */ + if (err == -ENOSPC) { + dbg_rcvry("could not find a dirty LEB"); + goto find_free; + } return err; } ubifs_assert(!(lp.flags & LPROPS_INDEX)); @@ -1139,8 +1153,8 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c) find_free: /* * There is no GC head LEB or the free space in the GC head LEB is too - * small. Allocate gc_lnum by calling 'ubifs_find_free_leb_for_idx()' so - * GC is not run. + * small, or there are not dirty LEBs. Allocate gc_lnum by calling + * 'ubifs_find_free_leb_for_idx()' so GC is not run. */ lnum = ubifs_find_free_leb_for_idx(c); if (lnum < 0) { @@ -1448,7 +1462,7 @@ int ubifs_recover_size(struct ubifs_info *c) } } if (e->exists && e->i_size < e->d_size) { - if (!e->inode && (c->vfs_sb->s_flags & MS_RDONLY)) { + if (!e->inode && c->ro_mount) { /* Fix the inode size and pin it in memory */ struct inode *inode; |