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59 lines
1.3 KiB
59 lines
1.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* linux/fs/sysv/file.c |
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* |
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* minix/file.c |
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* Copyright (C) 1991, 1992 Linus Torvalds |
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* |
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* coh/file.c |
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* Copyright (C) 1993 Pascal Haible, Bruno Haible |
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* |
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* sysv/file.c |
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* Copyright (C) 1993 Bruno Haible |
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* |
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* SystemV/Coherent regular file handling primitives |
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*/ |
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#include "sysv.h" |
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/* |
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* We have mostly NULLs here: the current defaults are OK for |
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* the coh filesystem. |
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*/ |
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const struct file_operations sysv_file_operations = { |
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.llseek = generic_file_llseek, |
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.read_iter = generic_file_read_iter, |
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.write_iter = generic_file_write_iter, |
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.mmap = generic_file_mmap, |
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.fsync = generic_file_fsync, |
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.splice_read = generic_file_splice_read, |
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}; |
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static int sysv_setattr(struct user_namespace *mnt_userns, |
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struct dentry *dentry, struct iattr *attr) |
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{ |
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struct inode *inode = d_inode(dentry); |
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int error; |
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error = setattr_prepare(&init_user_ns, dentry, attr); |
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if (error) |
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return error; |
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if ((attr->ia_valid & ATTR_SIZE) && |
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attr->ia_size != i_size_read(inode)) { |
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error = inode_newsize_ok(inode, attr->ia_size); |
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if (error) |
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return error; |
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truncate_setsize(inode, attr->ia_size); |
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sysv_truncate(inode); |
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} |
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setattr_copy(&init_user_ns, inode, attr); |
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mark_inode_dirty(inode); |
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return 0; |
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} |
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const struct inode_operations sysv_file_inode_operations = { |
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.setattr = sysv_setattr, |
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.getattr = sysv_getattr, |
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};
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