diff options
Diffstat (limited to 'fs/jfs/file.c')
| -rw-r--r-- | fs/jfs/file.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/fs/jfs/file.c b/fs/jfs/file.c new file mode 100644 index 000000000..332dc9ac4 --- /dev/null +++ b/fs/jfs/file.c @@ -0,0 +1,153 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) International Business Machines Corp., 2000-2002 + * Portions Copyright (C) Christoph Hellwig, 2001-2002 + */ + +#include <linux/mm.h> +#include <linux/fs.h> +#include <linux/posix_acl.h> +#include <linux/quotaops.h> +#include "jfs_incore.h" +#include "jfs_inode.h" +#include "jfs_dmap.h" +#include "jfs_txnmgr.h" +#include "jfs_xattr.h" +#include "jfs_acl.h" +#include "jfs_debug.h" + +int jfs_fsync(struct file *file, loff_t start, loff_t end, int datasync) +{ + struct inode *inode = file->f_mapping->host; + int rc = 0; + + rc = file_write_and_wait_range(file, start, end); + if (rc) + return rc; + + inode_lock(inode); + if (!(inode->i_state & I_DIRTY_ALL) || + (datasync && !(inode->i_state & I_DIRTY_DATASYNC))) { + /* Make sure committed changes hit the disk */ + jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1); + inode_unlock(inode); + return rc; + } + + rc |= jfs_commit_inode(inode, 1); + inode_unlock(inode); + + return rc ? -EIO : 0; +} + +static int jfs_open(struct inode *inode, struct file *file) +{ + int rc; + + if ((rc = dquot_file_open(inode, file))) + return rc; + + /* + * We attempt to allow only one "active" file open per aggregate + * group. Otherwise, appending to files in parallel can cause + * fragmentation within the files. + * + * If the file is empty, it was probably just created and going + * to be written to. If it has a size, we'll hold off until the + * file is actually grown. + */ + if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE && + (inode->i_size == 0)) { + struct jfs_inode_info *ji = JFS_IP(inode); + spin_lock_irq(&ji->ag_lock); + if (ji->active_ag == -1) { + struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb); + ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb); + atomic_inc(&jfs_sb->bmap->db_active[ji->active_ag]); + } + spin_unlock_irq(&ji->ag_lock); + } + + return 0; +} +static int jfs_release(struct inode *inode, struct file *file) +{ + struct jfs_inode_info *ji = JFS_IP(inode); + + spin_lock_irq(&ji->ag_lock); + if (ji->active_ag != -1) { + struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; + atomic_dec(&bmap->db_active[ji->active_ag]); + ji->active_ag = -1; + } + spin_unlock_irq(&ji->ag_lock); + + return 0; +} + +int jfs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, + struct iattr *iattr) +{ + struct inode *inode = d_inode(dentry); + int rc; + + rc = setattr_prepare(&init_user_ns, dentry, iattr); + if (rc) + return rc; + + if (is_quota_modification(mnt_userns, inode, iattr)) { + rc = dquot_initialize(inode); + if (rc) + return rc; + } + if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) || + (iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) { + rc = dquot_transfer(mnt_userns, inode, iattr); + if (rc) + return rc; + } + + if ((iattr->ia_valid & ATTR_SIZE) && + iattr->ia_size != i_size_read(inode)) { + inode_dio_wait(inode); + + rc = inode_newsize_ok(inode, iattr->ia_size); + if (rc) + return rc; + + truncate_setsize(inode, iattr->ia_size); + jfs_truncate(inode); + } + + setattr_copy(&init_user_ns, inode, iattr); + mark_inode_dirty(inode); + + if (iattr->ia_valid & ATTR_MODE) + rc = posix_acl_chmod(&init_user_ns, inode, inode->i_mode); + return rc; +} + +const struct inode_operations jfs_file_inode_operations = { + .listxattr = jfs_listxattr, + .setattr = jfs_setattr, + .fileattr_get = jfs_fileattr_get, + .fileattr_set = jfs_fileattr_set, +#ifdef CONFIG_JFS_POSIX_ACL + .get_acl = jfs_get_acl, + .set_acl = jfs_set_acl, +#endif +}; + +const struct file_operations jfs_file_operations = { + .open = jfs_open, + .llseek = generic_file_llseek, + .read_iter = generic_file_read_iter, + .write_iter = generic_file_write_iter, + .mmap = generic_file_mmap, + .splice_read = generic_file_splice_read, + .splice_write = iter_file_splice_write, + .fsync = jfs_fsync, + .release = jfs_release, + .unlocked_ioctl = jfs_ioctl, + .compat_ioctl = compat_ptr_ioctl, +}; |