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OpenCloudOS-Kernel
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[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>
This commit is contained in:
David Woodhouse 2008-02-25 15:25:25 +00:00
parent b28ba9fa01
commit dd919660aa
1 changed files with 6 additions and 1 deletions
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7
fs/jffs2/fs.c
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@ -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);