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superblock: mask getattr requests with supported_attrs

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on creation of a new superblock, construct a bitmap for the default attribute mask to be used for GETATTR and READDIR requests on that filesystem.  mask out any unsupported attributes, and store the bitmap in the field nfs41_superblock.default_getattr

replaced function init_getattr_request() with nfs41_superblock_getattr_mask(), which returns a copy of superblock->default_getattr

removed the locking in nfs41_superblock_supported_attrs() and nfs41_superblock_supported_attrs_exclcreat(), as the supported_attrs and suppattr_exclcreat fields are read-only after the superblock is first initialized.  also factored out their common code into a bitmap_intersect() function in util.h

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2012-04-02 14:22:58 -04:00 • committed by unknown
parent b955b6d3fe
commit c59124dd20
9 changed files with 65 additions and 71 deletions
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12
daemon/util.h
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@ -81,6 +81,18 @@ static __inline void bitmap_unset(
mask->count--;
}
}
static __inline void bitmap_intersect(
IN bitmap4 *dst,
IN const bitmap4 *src)
{
uint32_t i, count = 0;
for (i = 0; i < 3; i++) {
dst->arr[i] &= src->arr[i];
if (dst->arr[i])
count = i+1;
}
dst->count = min(dst->count, count);
}
ULONG nfs_file_info_to_attributes(
IN const nfs41_file_info *info);