1INODE_PERMISSION(9) The Linux VFS INODE_PERMISSION(9)
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6 inode_permission - Check for access rights to a given inode
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9 int inode_permission(struct inode * inode, int mask);
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12 inode
13 Inode to check permission on
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15 mask
16 Right to check for (MAY_READ, MAY_WRITE, MAY_EXEC)
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19 Check for read/write/execute permissions on an inode. We use fs[ug]id
20 for this, letting us set arbitrary permissions for filesystem access
21 without changing the “normal” UIDs which are used for other things.
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23 When checking for MAY_APPEND, MAY_WRITE must also be set in mask.
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26Kernel Hackers Manual 3.10 June 2019 INODE_PERMISSION(9)