072d916c1c
. vfs read_only() assumes vnode->v_vmnt is non-NULL, but it can be NULL sometimes . e.g. fchmod() on UDS triggered NULL deref; add a check and add REQ_CHMOD to pfs so unix domain sockets can be fchmod()ded . add to test56 Change-Id: I83c840f101b647516897cc99fcf472116d762012
28 lines
978 B
C
28 lines
978 B
C
#include "fs.h"
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#include "inode.h"
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/*===========================================================================*
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* fs_sync *
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*===========================================================================*/
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int fs_sync(message *fs_m_in, message *fs_m_out)
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{
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/* Perform the sync() system call. No-op on this FS. */
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return(OK); /* sync() can't fail */
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}
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/*===========================================================================*
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* fs_chmod *
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*===========================================================================*/
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int fs_chmod(message *fs_m_in, message *fs_m_out)
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{
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struct inode *rip; /* target inode */
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mode_t mode = (mode_t) fs_m_in->REQ_MODE;
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if( (rip = find_inode(fs_m_in->REQ_INODE_NR)) == NULL) return(EINVAL);
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get_inode(rip->i_dev, rip->i_num); /* mark inode in use */
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rip->i_mode = (rip->i_mode & ~ALL_MODES) | (mode & ALL_MODES);
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put_inode(rip); /* release the inode */
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return OK;
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}
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