From 78f70cd7b7e8fd44dc89af4f72fb110d865338a1 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Fri, 8 Jul 2011 14:35:19 +0200
Subject: xfs: cleanup the definition of struct xfs_dir2_sf_entry
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>
---
fs/xfs/xfs_dir2_sf.c | 6 +++---
fs/xfs/xfs_dir2_sf.h | 28 +++++++++++++---------------
2 files changed, 16 insertions(+), 18 deletions(-)
(limited to 'fs/xfs')
diff --git a/fs/xfs/xfs_dir2_sf.c b/fs/xfs/xfs_dir2_sf.c
index 806b348f496..3a1e3f4e3fa 100644
--- a/fs/xfs/xfs_dir2_sf.c
+++ b/fs/xfs/xfs_dir2_sf.c
@@ -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.
diff --git a/fs/xfs/xfs_dir2_sf.h b/fs/xfs/xfs_dir2_sf.h
index c1ab2e7c66a..55560bc80ec 100644
--- a/fs/xfs/xfs_dir2_sf.h
+++ b/fs/xfs/xfs_dir2_sf.h
@@ -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));
}
/*
--
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