diff options
author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2008-12-30 16:23:34 +0200 |
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committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2008-12-31 14:13:25 +0200 |
commit | 57a450e95932f7798677885b8a01443aca72fdc7 (patch) | |
tree | 18de5d14062a2f5c14f7b71c2cf1e48c345c0c87 /fs/ubifs | |
parent | a9f2fc0e251e71a51deb8059b181c375a4a5e979 (diff) | |
download | linux-57a450e95932f7798677885b8a01443aca72fdc7.tar.bz2 |
UBIFS: allow mounting when short of space
It is fine if there is not free space - we should still allow mounting
this FS. This patch relaxes the free space requirements and adds info
dumps.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'fs/ubifs')
-rw-r--r-- | fs/ubifs/super.c | 40 |
1 files changed, 29 insertions, 11 deletions
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 1c1bbe4135c6..2c91d6fa4e05 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1074,6 +1074,30 @@ again: } /** + * check_free_space - check if there is enough free space to mount. + * @c: UBIFS file-system description object + * + * This function makes sure UBIFS has enough free space to be mounted in + * read/write mode. UBIFS must always have some free space to allow deletions. + */ +static int check_free_space(struct ubifs_info *c) +{ + ubifs_assert(c->dark_wm > 0); + if (c->lst.total_free + c->lst.total_dirty < c->dark_wm) { + ubifs_err("insufficient free space to mount in read/write mode"); + dbg_dump_budg(c); + dbg_dump_lprops(c); + /* + * We return %-EINVAL instead of %-ENOSPC because it seems to + * be the closest error code mentioned in the mount function + * documentation. + */ + return -EINVAL; + } + return 0; +} + +/** * mount_ubifs - mount UBIFS file-system. * @c: UBIFS file-system description object * @@ -1154,7 +1178,7 @@ static int mount_ubifs(struct ubifs_info *c) /* * Make sure the compressor which is set as default in the superblock - * or overriden by mount options is actually compiled in. + * or overridden by mount options is actually compiled in. */ if (!ubifs_compr_present(c->default_compr)) { ubifs_err("'compressor \"%s\" is not compiled in", @@ -1236,12 +1260,9 @@ static int mount_ubifs(struct ubifs_info *c) if (!mounted_read_only) { int lnum; - /* Check for enough free space */ - if (ubifs_calc_available(c, c->min_idx_lebs) <= 0) { - ubifs_err("insufficient available space"); - err = -EINVAL; + err = check_free_space(c); + if (err) goto out_orphans; - } /* Check for enough log space */ lnum = c->lhead_lnum + 1; @@ -1442,12 +1463,9 @@ static int ubifs_remount_rw(struct ubifs_info *c) c->remounting_rw = 1; c->always_chk_crc = 1; - /* Check for enough free space */ - if (ubifs_calc_available(c, c->min_idx_lebs) <= 0) { - ubifs_err("insufficient available space"); - err = -EINVAL; + err = check_free_space(c); + if (err) goto out; - } if (c->old_leb_cnt != c->leb_cnt) { struct ubifs_sb_node *sup; |