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reiserfs: switch to generic_{get,set,remove}xattr()

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reiserfs_xattr_[sg]et() will fail with -EOPNOTSUPP for V1 inodes anyway,
and all reiserfs instances of ->[sg]et() call it and so does ->set_acl().

Checks for name length in the instances had been bogus; they should've
been "bugger off if it's _exactly_ the prefix" (as generic would
do on its own) and not "bugger off if it's shorter than the prefix" -
that can't happen.

xattr_full_name() is needed to adjust for the fact that generic instances
will skip the prefix in the name passed to ->[gs]et(); reiserfs homegrown
analogues didn't.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2016-04-10 18:50:48 -04:00
parent 5fdccfef48
commit 79a628d14e
7 changed files with 31 additions and 98 deletions
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54
fs/reiserfs/xattr.c
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@@ -764,60 +764,6 @@ find_xattr_handler_prefix(const struct xattr_handler **handlers,
return xah;
}
/*
* Inode operation getxattr()
*/
ssize_t
reiserfs_getxattr(struct dentry * dentry, const char *name, void *buffer,
size_t size)
{
const struct xattr_handler *handler;
handler = find_xattr_handler_prefix(dentry->d_sb->s_xattr, name);
if (!handler || get_inode_sd_version(d_inode(dentry)) == STAT_DATA_V1)
return -EOPNOTSUPP;
return handler->get(handler, dentry, name, buffer, size);
}
/*
* Inode operation setxattr()
*
* d_inode(dentry)->i_mutex down
*/
int
reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags)
{
const struct xattr_handler *handler;
handler = find_xattr_handler_prefix(dentry->d_sb->s_xattr, name);
if (!handler || get_inode_sd_version(d_inode(dentry)) == STAT_DATA_V1)
return -EOPNOTSUPP;
return handler->set(handler, dentry, name, value, size, flags);
}
/*
* Inode operation removexattr()
*
* d_inode(dentry)->i_mutex down
*/
int reiserfs_removexattr(struct dentry *dentry, const char *name)
{
const struct xattr_handler *handler;
handler = find_xattr_handler_prefix(dentry->d_sb->s_xattr, name);
if (!handler || get_inode_sd_version(d_inode(dentry)) == STAT_DATA_V1)
return -EOPNOTSUPP;
return handler->set(handler, dentry, name, NULL, 0, XATTR_REPLACE);
}
struct listxattr_buf {
struct dir_context ctx;
size_t size;