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UBIFS: fix the dark space calculation

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The dark space calculation should be 64 bit type-casted, when
assigning to tmp64 (similar to how total_free is calculated).
Overflow will occur for very large flashes.

Signed-off-by: srimugunthan <srimugunthan.dhandapani@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
This commit is contained in:
srimugunthan dhandapani 2011-08-26 16:08:39 +05:30 • committed by Artem Bityutskiy
parent d37854cf99
commit 7606f85a70
2 changed files with 2 additions and 2 deletions
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2
fs/ubifs/recovery.c
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@ -983,7 +983,7 @@ int ubifs_recover_inl_heads(struct ubifs_info *c, void *sbuf)
} }
/** /**
* clean_an_unclean_leb - read and write a LEB to remove corruption. * clean_an_unclean_leb - read and write a LEB to remove corruption.
* @c: UBIFS file-system description object * @c: UBIFS file-system description object
* @ucleb: unclean LEB information * @ucleb: unclean LEB information
* @sbuf: LEB-sized buffer to use * @sbuf: LEB-sized buffer to use

2
fs/ubifs/sb.c
View file

@ -247,7 +247,7 @@ static int create_default_filesystem(struct ubifs_info *c)
mst->total_dirty = cpu_to_le64(tmp64); mst->total_dirty = cpu_to_le64(tmp64);
/* The indexing LEB does not contribute to dark space */ /* The indexing LEB does not contribute to dark space */
tmp64 = (c->main_lebs - 1) * c->dark_wm; tmp64 = ((long long)(c->main_lebs - 1) * c->dark_wm);
mst->total_dark = cpu_to_le64(tmp64); mst->total_dark = cpu_to_le64(tmp64);
mst->total_used = cpu_to_le64(UBIFS_INO_NODE_SZ); mst->total_used = cpu_to_le64(UBIFS_INO_NODE_SZ);