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exportfs: Return the minimum required handle size

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The exportfs encode handle function should return the minimum required
handle size. This helps user to find out the handle size by passing 0
handle size in the first step and then redoing to the call again with
the returned handle size value.

Acked-by: Serge Hallyn <[email protected]>
Signed-off-by: Aneesh Kumar K.V <[email protected]>
Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Aneesh Kumar K.V 2011-01-29 18:43:25 +05:30 • committed by Al Viro
commit 5fe0c23788
12 changed files with 59 additions and 18 deletions
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4
fs/fat/inode.c
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@ -757,8 +757,10 @@ fat_encode_fh(struct dentry *de, __u32 *fh, int *lenp, int connectable)
struct inode *inode = de->d_inode;
u32 ipos_h, ipos_m, ipos_l;
if (len < 5)
if (len < 5) {
*lenp = 5;
return 255; /* no room */
}
ipos_h = MSDOS_I(inode)->i_pos >> 8;
ipos_m = (MSDOS_I(inode)->i_pos & 0xf0) << 24;