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f2d40141d5
Convert to struct mnt_idmap.
Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.
Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.
Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
143 lines
3.6 KiB
C
143 lines
3.6 KiB
C
/*
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* ialloc.c
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*
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* PURPOSE
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* Inode allocation handling routines for the OSTA-UDF(tm) filesystem.
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*
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* COPYRIGHT
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* This file is distributed under the terms of the GNU General Public
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* License (GPL). Copies of the GPL can be obtained from:
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* ftp://prep.ai.mit.edu/pub/gnu/GPL
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* Each contributing author retains all rights to their own work.
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*
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* (C) 1998-2001 Ben Fennema
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*
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* HISTORY
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*
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* 02/24/99 blf Created.
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*
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*/
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#include "udfdecl.h"
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#include <linux/fs.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include "udf_i.h"
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#include "udf_sb.h"
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void udf_free_inode(struct inode *inode)
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{
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struct super_block *sb = inode->i_sb;
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struct udf_sb_info *sbi = UDF_SB(sb);
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struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
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if (lvidiu) {
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mutex_lock(&sbi->s_alloc_mutex);
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if (S_ISDIR(inode->i_mode))
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le32_add_cpu(&lvidiu->numDirs, -1);
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else
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le32_add_cpu(&lvidiu->numFiles, -1);
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udf_updated_lvid(sb);
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mutex_unlock(&sbi->s_alloc_mutex);
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}
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udf_free_blocks(sb, NULL, &UDF_I(inode)->i_location, 0, 1);
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}
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struct inode *udf_new_inode(struct inode *dir, umode_t mode)
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{
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struct super_block *sb = dir->i_sb;
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struct udf_sb_info *sbi = UDF_SB(sb);
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struct inode *inode;
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udf_pblk_t block;
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uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
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struct udf_inode_info *iinfo;
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struct udf_inode_info *dinfo = UDF_I(dir);
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struct logicalVolIntegrityDescImpUse *lvidiu;
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int err;
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inode = new_inode(sb);
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if (!inode)
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return ERR_PTR(-ENOMEM);
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iinfo = UDF_I(inode);
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if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
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iinfo->i_efe = 1;
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if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
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sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
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iinfo->i_data = kzalloc(inode->i_sb->s_blocksize -
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sizeof(struct extendedFileEntry),
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GFP_KERNEL);
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} else {
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iinfo->i_efe = 0;
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iinfo->i_data = kzalloc(inode->i_sb->s_blocksize -
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sizeof(struct fileEntry),
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GFP_KERNEL);
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}
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if (!iinfo->i_data) {
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make_bad_inode(inode);
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iput(inode);
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return ERR_PTR(-ENOMEM);
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}
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err = -ENOSPC;
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block = udf_new_block(dir->i_sb, NULL,
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dinfo->i_location.partitionReferenceNum,
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start, &err);
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if (err) {
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make_bad_inode(inode);
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iput(inode);
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return ERR_PTR(err);
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}
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lvidiu = udf_sb_lvidiu(sb);
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if (lvidiu) {
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iinfo->i_unique = lvid_get_unique_id(sb);
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inode->i_generation = iinfo->i_unique;
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mutex_lock(&sbi->s_alloc_mutex);
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if (S_ISDIR(mode))
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le32_add_cpu(&lvidiu->numDirs, 1);
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else
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le32_add_cpu(&lvidiu->numFiles, 1);
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udf_updated_lvid(sb);
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mutex_unlock(&sbi->s_alloc_mutex);
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}
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inode_init_owner(&nop_mnt_idmap, inode, dir, mode);
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if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
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inode->i_uid = sbi->s_uid;
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if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
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inode->i_gid = sbi->s_gid;
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iinfo->i_location.logicalBlockNum = block;
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iinfo->i_location.partitionReferenceNum =
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dinfo->i_location.partitionReferenceNum;
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inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0);
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inode->i_blocks = 0;
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iinfo->i_lenEAttr = 0;
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iinfo->i_lenAlloc = 0;
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iinfo->i_use = 0;
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iinfo->i_checkpoint = 1;
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iinfo->i_extraPerms = FE_PERM_U_CHATTR;
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udf_update_extra_perms(inode, mode);
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if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
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iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
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else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
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iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
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else
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iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
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inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
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iinfo->i_crtime = inode->i_mtime;
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if (unlikely(insert_inode_locked(inode) < 0)) {
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make_bad_inode(inode);
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iput(inode);
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return ERR_PTR(-EIO);
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}
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mark_inode_dirty(inode);
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return inode;
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}
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