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| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2008-12-19 19:26:29 +0200 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2008-12-23 12:23:29 +0200 |
| commit | af14a1ad792621942a03e4bd0e5f17b6e177e2e0 (patch) | |
| tree | b91e77a8a1a373ca3dfcc84ec0feb243fb74e2e5 /fs | |
| parent | d3cf502b6ccee1c52890d42cd18cbc98b7526126 (diff) | |
| download | lwn-af14a1ad792621942a03e4bd0e5f17b6e177e2e0.tar.gz lwn-af14a1ad792621942a03e4bd0e5f17b6e177e2e0.zip | |
UBIFS: fix available blocks count
Take into account that 2 eraseblocks are never available because
they are reserved for the index. This gives more realistic count
of FS blocks.
To avoid future confusions like this, introduce a constant.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ubifs/budget.c | 9 | ||||
| -rw-r--r-- | fs/ubifs/super.c | 5 | ||||
| -rw-r--r-- | fs/ubifs/ubifs.h | 8 |
3 files changed, 13 insertions, 9 deletions
diff --git a/fs/ubifs/budget.c b/fs/ubifs/budget.c index d5a65037e172..e42342547001 100644 --- a/fs/ubifs/budget.c +++ b/fs/ubifs/budget.c @@ -280,13 +280,8 @@ int ubifs_calc_min_idx_lebs(struct ubifs_info *c) * extra LEB to compensate. */ ret += 1; - /* - * At present the index needs at least 2 LEBs: one for the index head - * and one for in-the-gaps method (which currently does not cater for - * the index head and so excludes it from consideration). - */ - if (ret < 2) - ret = 2; + if (ret < MIN_INDEX_LEBS) + ret = MIN_INDEX_LEBS; return ret; } diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 2dbaa4fc2cbb..a6a7798d020b 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -695,9 +695,10 @@ static int init_constants_late(struct ubifs_info *c) * necessary to report something for the 'statfs()' call. * * Subtract the LEB reserved for GC, the LEB which is reserved for - * deletions, and assume only one journal head is available. + * deletions, minimum LEBs for the index, and assume only one journal + * head is available. */ - tmp64 = c->main_lebs - 2 - c->jhead_cnt + 1; + tmp64 = c->main_lebs - 1 - 1 - MIN_INDEX_LEBS - c->jhead_cnt + 1; tmp64 *= (uint64_t)c->leb_size - c->leb_overhead; tmp64 = ubifs_reported_space(c, tmp64); c->block_cnt = tmp64 >> UBIFS_BLOCK_SHIFT; diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h index f8ef7c1def1f..543e850022eb 100644 --- a/fs/ubifs/ubifs.h +++ b/fs/ubifs/ubifs.h @@ -63,6 +63,14 @@ #define SQNUM_WARN_WATERMARK 0xFFFFFFFF00000000ULL #define SQNUM_WATERMARK 0xFFFFFFFFFF000000ULL +/* + * Minimum amount of LEBs reserved for the index. At present the index needs at + * least 2 LEBs: one for the index head and one for in-the-gaps method (which + * currently does not cater for the index head and so excludes it from + * consideration). + */ +#define MIN_INDEX_LEBS 2 + /* Minimum amount of data UBIFS writes to the flash */ #define MIN_WRITE_SZ (UBIFS_DATA_NODE_SZ + 8) |