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xfs: cleanup the definition of struct xfs_dir2_sf_entry

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Remove the inumber member which is at a variable offset after the actual
name, and make name a real variable sized C99 array instead of the incorrect
one-sized array which confuses (not only) gcc.  Based on this clean up
the helpers to calculate the entry size.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Christoph Hellwig 2011-07-08 14:35:19 +02:00
parent ac8ba50f6b
commit 78f70cd7b7
2 changed files with 16 additions and 18 deletions
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6
fs/xfs/xfs_dir2_sf.c
View File

@ -371,7 +371,7 @@ xfs_dir2_sf_addname(
/*
* Compute entry (and change in) size.
*/
add_entsize = xfs_dir2_sf_entsize_byname(sfp, args->namelen);
add_entsize = xfs_dir2_sf_entsize(sfp, args->namelen);
incr_isize = add_entsize;
objchange = 0;
#if XFS_BIG_INUMS
@ -465,7 +465,7 @@ xfs_dir2_sf_addname_easy(
/*
* Grow the in-inode space.
*/
xfs_idata_realloc(dp, xfs_dir2_sf_entsize_byname(sfp, args->namelen),
xfs_idata_realloc(dp, xfs_dir2_sf_entsize(sfp, args->namelen),
XFS_DATA_FORK);
/*
* Need to set up again due to realloc of the inode data.
@ -1001,7 +1001,7 @@ xfs_dir2_sf_removename(
* Calculate sizes.
*/
byteoff = (int)((char *)sfep - (char *)sfp);
entsize = xfs_dir2_sf_entsize_byname(sfp, args->namelen);
entsize = xfs_dir2_sf_entsize(sfp, args->namelen);
newsize = oldsize - entsize;
/*
* Copy the part if any after the removed entry, sliding it down.

28
fs/xfs/xfs_dir2_sf.h
View File

@ -76,10 +76,13 @@ typedef struct xfs_dir2_sf_hdr {
} __arch_pack xfs_dir2_sf_hdr_t;
typedef struct xfs_dir2_sf_entry {
__uint8_t namelen; /* actual name length */
__u8 namelen; /* actual name length */
xfs_dir2_sf_off_t offset; /* saved offset */
__uint8_t name[1]; /* name, variable size */
xfs_dir2_inou_t inumber; /* inode number, var. offset */
__u8 name[]; /* name, variable size */
/*
* A xfs_dir2_ino8_t or xfs_dir2_ino4_t follows here, at a
* variable offset after the name.
*/
} __arch_pack xfs_dir2_sf_entry_t;
static inline int xfs_dir2_sf_hdr_size(int i8count)
@ -101,19 +104,14 @@ xfs_dir2_sf_put_offset(xfs_dir2_sf_entry_t *sfep, xfs_dir2_data_aoff_t off)
INT_SET_UNALIGNED_16_BE(&(sfep)->offset.i, off);
}
static inline int xfs_dir2_sf_entsize_byname(xfs_dir2_sf_hdr_t *sfp, int len)
{
return ((uint)sizeof(xfs_dir2_sf_entry_t) - 1 + (len) - \
((sfp)->i8count == 0) * \
((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)));
}
static inline int
xfs_dir2_sf_entsize_byentry(xfs_dir2_sf_hdr_t *sfp, xfs_dir2_sf_entry_t *sfep)
xfs_dir2_sf_entsize(struct xfs_dir2_sf_hdr *hdr, int len)
{
return ((uint)sizeof(xfs_dir2_sf_entry_t) - 1 + (sfep)->namelen - \
((sfp)->i8count == 0) * \
((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)));
return sizeof(struct xfs_dir2_sf_entry) + /* namelen + offset */
len + /* name */
(hdr->i8count ? /* ino */
sizeof(xfs_dir2_ino8_t) :
sizeof(xfs_dir2_ino4_t));
}
static inline struct xfs_dir2_sf_entry *
@ -128,7 +126,7 @@ xfs_dir2_sf_nextentry(struct xfs_dir2_sf_hdr *hdr,
struct xfs_dir2_sf_entry *sfep)
{
return (struct xfs_dir2_sf_entry *)
((char *)sfep + xfs_dir2_sf_entsize_byentry(hdr, sfep));
((char *)sfep + xfs_dir2_sf_entsize(hdr, sfep->namelen));
}
/*