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UBIFS: return sensible error codes 

When mounting/re-mounting, UBIFS returns EINVAL even if the ENOSPC
or EROFS codes are are much better, just because we have not found
references to ENOSPC/EROFS in mount (2) man pages. This patch
changes this behaviour and makes UBIFS return real error code,
because:

1. It is just less confusing and more logical
2. mount is not described in SuSv3, so it seems to be not really
   well-standartized
3. we do not cover all cases, and any random undocumented in man
   pages error code may be returned anyway

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy 2009-01-29 16:22:54 +02:00
parent b466f17d78
commit a2b9df3ff6
2 changed files with 4 additions and 9 deletions
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2
fs/ubifs/master.c
View File

@ -354,7 +354,7 @@ int ubifs_write_master(struct ubifs_info *c)
int err, lnum, offs, len;
if (c->ro_media)
return -EINVAL;
return -EROFS;
lnum = UBIFS_MST_LNUM;
offs = c->mst_offs + c->mst_node_alsz;

11
fs/ubifs/super.c
View File

@ -1085,12 +1085,7 @@ static int check_free_space(struct ubifs_info *c)
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 -ENOSPC;
}
return 0;
}
@ -1790,7 +1785,7 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data)
if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
if (c->ro_media) {
ubifs_msg("cannot re-mount due to prior errors");
return -EINVAL;
return -EROFS;
}
err = ubifs_remount_rw(c);
if (err)
@ -1798,7 +1793,7 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data)
} else if (!(sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) {
if (c->ro_media) {
ubifs_msg("cannot re-mount due to prior errors");
return -EINVAL;
return -EROFS;
}
ubifs_remount_ro(c);
}