/*
* Remove an entry from a directory.
*/
int
xfs_dir_removename(
xfs_trans_t *tp,
xfs_inode_t *dp,
struct xfs_name *name,
xfs_ino_t ino,
xfs_fsblock_t *first, /* bmap's firstblock */
xfs_bmap_free_t *flist, /* bmap's freeblock list */
xfs_extlen_t total) /* bmap's total block count */
{
xfs_da_args_t args;
int rval;
int v; /* type-checking value */
ASSERT(S_ISDIR(dp->i_d.di_mode));
XFS_STATS_INC(xs_dir_remove);
memset(&args, 0, sizeof(xfs_da_args_t));
args.name = name->name;
args.namelen = name->len;
args.hashval = dp->i_mount->m_dirnameops->hashname(name);
args.inumber = ino;
args.dp = dp;
args.firstblock = first;
args.flist = flist;
args.total = total;
args.whichfork = XFS_DATA_FORK;
args.trans = tp;
if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
rval = xfs_dir2_sf_removename(&args);
else if ((rval = xfs_dir2_isblock(tp, dp, &v)))
return rval;
else if (v)
rval = xfs_dir2_block_removename(&args);
else if ((rval = xfs_dir2_isleaf(tp, dp, &v)))
return rval;
else if (v)
rval = xfs_dir2_leaf_removename(&args);
else
rval = xfs_dir2_node_removename(&args);
return rval;
}
/*
* See if this entry can be added to the directory without allocating space.
* First checks that the caller couldn't reserve enough space (resblks = 0).
*/
int
xfs_dir_canenter(
xfs_trans_t *tp,
xfs_inode_t *dp,
struct xfs_name *name, /* name of entry to add */
uint resblks)
{
xfs_da_args_t args;
int rval;
int v; /* type-checking value */
if (resblks)
return 0;
ASSERT(S_ISDIR(dp->i_d.di_mode));
memset(&args, 0, sizeof(xfs_da_args_t));
args.name = name->name;
args.namelen = name->len;
args.filetype = name->type;
args.hashval = dp->i_mount->m_dirnameops->hashname(name);
args.dp = dp;
args.whichfork = XFS_DATA_FORK;
args.trans = tp;
args.op_flags = XFS_DA_OP_JUSTCHECK | XFS_DA_OP_ADDNAME |
XFS_DA_OP_OKNOENT;
if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
rval = xfs_dir2_sf_addname(&args);
else if ((rval = xfs_dir2_isblock(tp, dp, &v)))
return rval;
else if (v)
rval = xfs_dir2_block_addname(&args);
else if ((rval = xfs_dir2_isleaf(tp, dp, &v)))
return rval;
else if (v)
rval = xfs_dir2_leaf_addname(&args);
else
rval = xfs_dir2_node_addname(&args);
return rval;
}
/*
* Lookup a name in a directory, give back the inode number.
*/
int
xfs_dir_lookup(
xfs_trans_t *tp,
xfs_inode_t *dp,
struct xfs_name *name,
xfs_ino_t *inum) /* out: inode number */
{
xfs_da_args_t args;
int rval;
int v; /* type-checking value */
ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
XFS_STATS_INC(xs_dir_lookup);
memset(&args, 0, sizeof(xfs_da_args_t));
args.name = name->name;
args.namelen = name->len;
args.hashval = xfs_da_hashname(name->name, name->len);
args.dp = dp;
args.whichfork = XFS_DATA_FORK;
args.trans = tp;
args.oknoent = 1;
if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
rval = xfs_dir2_sf_lookup(&args);
else if ((rval = xfs_dir2_isblock(tp, dp, &v)))
return rval;
else if (v)
rval = xfs_dir2_block_lookup(&args);
else if ((rval = xfs_dir2_isleaf(tp, dp, &v)))
return rval;
else if (v)
rval = xfs_dir2_leaf_lookup(&args);
else
rval = xfs_dir2_node_lookup(&args);
if (rval == EEXIST)
rval = 0;
if (rval == 0)
*inum = args.inumber;
return rval;
}
/*
* See if this entry can be added to the directory without allocating space.
*/
int
xfs_dir_canenter(
xfs_trans_t *tp,
xfs_inode_t *dp,
char *name, /* name of entry to add */
int namelen)
{
xfs_da_args_t args;
int rval;
int v; /* type-checking value */
ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
args.name = name;
args.namelen = namelen;
args.hashval = xfs_da_hashname(name, namelen);
args.inumber = 0;
args.dp = dp;
args.firstblock = NULL;
args.flist = NULL;
args.total = 0;
args.whichfork = XFS_DATA_FORK;
args.trans = tp;
args.justcheck = args.addname = args.oknoent = 1;
if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
rval = xfs_dir2_sf_addname(&args);
else if ((rval = xfs_dir2_isblock(tp, dp, &v)))
return rval;
else if (v)
rval = xfs_dir2_block_addname(&args);
else if ((rval = xfs_dir2_isleaf(tp, dp, &v)))
return rval;
else if (v)
rval = xfs_dir2_leaf_addname(&args);
else
rval = xfs_dir2_node_addname(&args);
return rval;
}
/*
* See if this entry can be added to the directory without allocating space.
* First checks that the caller couldn't reserve enough space (resblks = 0).
*/
int
xfs_dir_canenter(
xfs_trans_t *tp,
xfs_inode_t *dp,
struct xfs_name *name, /* name of entry to add */
uint resblks)
{
xfs_da_args_t args;
int rval;
int v; /* type-checking value */
if (resblks)
return 0;
ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
memset(&args, 0, sizeof(xfs_da_args_t));
args.name = name->name;
args.namelen = name->len;
args.hashval = xfs_da_hashname(name->name, name->len);
args.dp = dp;
args.whichfork = XFS_DATA_FORK;
args.trans = tp;
args.justcheck = args.addname = args.oknoent = 1;
if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
rval = xfs_dir2_sf_addname(&args);
else if ((rval = xfs_dir2_isblock(tp, dp, &v)))
return rval;
else if (v)
rval = xfs_dir2_block_addname(&args);
else if ((rval = xfs_dir2_isleaf(tp, dp, &v)))
return rval;
else if (v)
rval = xfs_dir2_leaf_addname(&args);
else
rval = xfs_dir2_node_addname(&args);
return rval;
}
/*
* Read a directory.
*/
int
xfs_readdir(
xfs_inode_t *dp,
void *dirent,
size_t bufsize,
xfs_off_t *offset,
filldir_t filldir)
{
int rval; /* return value */
int v; /* type-checking value */
if (!(dp->i_d.di_mode & S_IFDIR))
return XFS_ERROR(ENOTDIR);
//TODO: find suitable replacement
//trace_xfs_readdir(dp);
//TODO: handle shutdown?
if (XFS_FORCED_SHUTDOWN(dp->i_mount))
return XFS_ERROR(EIO);
ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
//TODO: do we need this?
XFS_STATS_INC(xs_dir_getdents);
if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
rval = xfs_dir2_sf_getdents(dp, dirent, offset, filldir);
else if ((rval = xfs_dir2_isblock(NULL, dp, &v)))
;
else if (v)
rval = xfs_dir2_block_getdents(dp, dirent, offset, filldir);
else
rval = xfs_dir2_leaf_getdents(dp, dirent, bufsize, offset,
filldir);
return rval;
}
/*
* Replace the inode number of a directory entry.
*/
int
xfs_dir_replace(
xfs_trans_t *tp,
xfs_inode_t *dp,
struct xfs_name *name, /* name of entry to replace */
xfs_ino_t inum, /* new inode number */
xfs_fsblock_t *first, /* bmap's firstblock */
xfs_bmap_free_t *flist, /* bmap's freeblock list */
xfs_extlen_t total) /* bmap's total block count */
{
struct xfs_da_args *args;
int rval;
int v; /* type-checking value */
ASSERT(S_ISDIR(dp->i_d.di_mode));
rval = xfs_dir_ino_validate(tp->t_mountp, inum);
if (rval)
return rval;
args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
if (!args)
return -ENOMEM;
args->geo = dp->i_mount->m_dir_geo;
args->name = name->name;
args->namelen = name->len;
args->filetype = name->type;
args->hashval = dp->i_mount->m_dirnameops->hashname(name);
args->inumber = inum;
args->dp = dp;
args->firstblock = first;
args->flist = flist;
args->total = total;
args->whichfork = XFS_DATA_FORK;
args->trans = tp;
if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
rval = xfs_dir2_sf_replace(args);
goto out_free;
}
rval = xfs_dir2_isblock(args, &v);
if (rval)
goto out_free;
if (v) {
rval = xfs_dir2_block_replace(args);
goto out_free;
}
rval = xfs_dir2_isleaf(args, &v);
if (rval)
goto out_free;
if (v)
rval = xfs_dir2_leaf_replace(args);
else
rval = xfs_dir2_node_replace(args);
out_free:
kmem_free(args);
return rval;
}
int
xfs_dir_lookup(
xfs_trans_t *tp,
xfs_inode_t *dp,
struct xfs_name *name,
xfs_ino_t *inum, /* out: inode number */
struct xfs_name *ci_name) /* out: actual name if CI match */
{
struct xfs_da_args *args;
int rval;
int v; /* type-checking value */
ASSERT(S_ISDIR(dp->i_d.di_mode));
XFS_STATS_INC(xs_dir_lookup);
/*
* We need to use KM_NOFS here so that lockdep will not throw false
* positive deadlock warnings on a non-transactional lookup path. It is
* safe to recurse into inode recalim in that case, but lockdep can't
* easily be taught about it. Hence KM_NOFS avoids having to add more
* lockdep Doing this avoids having to add a bunch of lockdep class
* annotations into the reclaim path for the ilock.
*/
args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
args->geo = dp->i_mount->m_dir_geo;
args->name = name->name;
args->namelen = name->len;
args->filetype = name->type;
args->hashval = dp->i_mount->m_dirnameops->hashname(name);
args->dp = dp;
args->whichfork = XFS_DATA_FORK;
args->trans = tp;
args->op_flags = XFS_DA_OP_OKNOENT;
if (ci_name)
args->op_flags |= XFS_DA_OP_CILOOKUP;
if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
rval = xfs_dir2_sf_lookup(args);
goto out_check_rval;
}
rval = xfs_dir2_isblock(args, &v);
if (rval)
goto out_free;
if (v) {
rval = xfs_dir2_block_lookup(args);
goto out_check_rval;
}
rval = xfs_dir2_isleaf(args, &v);
if (rval)
goto out_free;
if (v)
rval = xfs_dir2_leaf_lookup(args);
else
rval = xfs_dir2_node_lookup(args);
out_check_rval:
if (rval == -EEXIST)
rval = 0;
if (!rval) {
*inum = args->inumber;
if (ci_name) {
ci_name->name = args->value;
ci_name->len = args->valuelen;
}
}
out_free:
kmem_free(args);
return rval;
}
/*
* Enter a name in a directory, or check for available space.
* If inum is 0, only the available space test is performed.
*/
int
xfs_dir_createname(
xfs_trans_t *tp,
xfs_inode_t *dp,
struct xfs_name *name,
xfs_ino_t inum, /* new entry inode number */
xfs_fsblock_t *first, /* bmap's firstblock */
struct xfs_defer_ops *dfops, /* bmap's freeblock list */
xfs_extlen_t total) /* bmap's total block count */
{
struct xfs_da_args *args;
int rval;
int v; /* type-checking value */
ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
if (inum) {
rval = xfs_dir_ino_validate(tp->t_mountp, inum);
if (rval)
return rval;
XFS_STATS_INC(dp->i_mount, xs_dir_create);
}
args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
if (!args)
return -ENOMEM;
args->geo = dp->i_mount->m_dir_geo;
args->name = name->name;
args->namelen = name->len;
args->filetype = name->type;
args->hashval = dp->i_mount->m_dirnameops->hashname(name);
args->inumber = inum;
args->dp = dp;
args->firstblock = first;
args->dfops = dfops;
args->total = total;
args->whichfork = XFS_DATA_FORK;
args->trans = tp;
args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
if (!inum)
args->op_flags |= XFS_DA_OP_JUSTCHECK;
if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
rval = xfs_dir2_sf_addname(args);
goto out_free;
}
rval = xfs_dir2_isblock(args, &v);
if (rval)
goto out_free;
if (v) {
rval = xfs_dir2_block_addname(args);
goto out_free;
}
rval = xfs_dir2_isleaf(args, &v);
if (rval)
goto out_free;
if (v)
rval = xfs_dir2_leaf_addname(args);
else
rval = xfs_dir2_node_addname(args);
out_free:
kmem_free(args);
return rval;
}
