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authorDavid Woodhouse <dwmw2@infradead.org>2008-02-25 15:25:25 +0000
committerDavid Woodhouse <dwmw2@infradead.org>2008-02-25 15:25:25 +0000
commitdd919660aacdf4adfcd279556aa03e595f7f0fc2 (patch)
tree8b005d7a921f4814a221e7811f0e7da40747f482 /fs/jffs2/fs.c
parentb28ba9fa0154f78f3d36f5ae9a42f7bb01663cca (diff)
downloadlinux-dd919660aacdf4adfcd279556aa03e595f7f0fc2.tar.bz2
[JFFS2] Use ALLOC_DELETION priority for truncation to zero length
This is going to obsolete all previous nodes, so treat it as deletion. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'fs/jffs2/fs.c')
-rw-r--r--fs/jffs2/fs.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index 3f49562dc508..9dafb53fb1d1 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -36,6 +36,7 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
unsigned int ivalid;
uint32_t alloclen;
int ret;
+ int alloc_type = ALLOC_NORMAL;
D1(printk(KERN_DEBUG "jffs2_setattr(): ino #%lu\n", inode->i_ino));
@@ -115,6 +116,10 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
ri->compr = JFFS2_COMPR_ZERO;
ri->dsize = cpu_to_je32(iattr->ia_size - inode->i_size);
ri->offset = cpu_to_je32(inode->i_size);
+ } else if (ivalid & ATTR_SIZE && !iattr->ia_size) {
+ /* For truncate-to-zero, treat it as deletion because
+ it'll always be obsoleting all previous nodes */
+ alloc_type = ALLOC_DELETION;
}
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
if (mdatalen)
@@ -122,7 +127,7 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
else
ri->data_crc = cpu_to_je32(0);
- new_metadata = jffs2_write_dnode(c, f, ri, mdata, mdatalen, ALLOC_NORMAL);
+ new_metadata = jffs2_write_dnode(c, f, ri, mdata, mdatalen, alloc_type);
if (S_ISLNK(inode->i_mode))
kfree(mdata);