vfs.h 5.8 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /*
  3. * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
  4. */
  5. #ifndef LINUX_NFSD_VFS_H
  6. #define LINUX_NFSD_VFS_H
  7. #include "nfsfh.h"
  8. #include "nfsd.h"
  9. /*
  10. * Flags for nfsd_permission
  11. */
  12. #define NFSD_MAY_NOP 0
  13. #define NFSD_MAY_EXEC 0x001 /* == MAY_EXEC */
  14. #define NFSD_MAY_WRITE 0x002 /* == MAY_WRITE */
  15. #define NFSD_MAY_READ 0x004 /* == MAY_READ */
  16. #define NFSD_MAY_SATTR 0x008
  17. #define NFSD_MAY_TRUNC 0x010
  18. #define NFSD_MAY_LOCK 0x020
  19. #define NFSD_MAY_MASK 0x03f
  20. /* extra hints to permission and open routines: */
  21. #define NFSD_MAY_OWNER_OVERRIDE 0x040
  22. #define NFSD_MAY_LOCAL_ACCESS 0x080 /* for device special files */
  23. #define NFSD_MAY_BYPASS_GSS_ON_ROOT 0x100
  24. #define NFSD_MAY_NOT_BREAK_LEASE 0x200
  25. #define NFSD_MAY_BYPASS_GSS 0x400
  26. #define NFSD_MAY_READ_IF_EXEC 0x800
  27. #define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */
  28. #define NFSD_MAY_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE)
  29. #define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC)
  30. struct nfsd_file;
  31. /*
  32. * Callback function for readdir
  33. */
  34. typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
  35. /* nfsd/vfs.c */
  36. int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
  37. struct svc_export **expp);
  38. __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *,
  39. const char *, unsigned int, struct svc_fh *);
  40. __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,
  41. const char *, unsigned int,
  42. struct svc_export **, struct dentry **);
  43. __be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *,
  44. struct iattr *, int, time64_t);
  45. int nfsd_mountpoint(struct dentry *, struct svc_export *);
  46. #ifdef CONFIG_NFSD_V4
  47. __be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *,
  48. struct xdr_netobj *);
  49. __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *,
  50. struct file *, loff_t, loff_t, int);
  51. __be32 nfsd4_clone_file_range(struct nfsd_file *nf_src, u64 src_pos,
  52. struct nfsd_file *nf_dst, u64 dst_pos,
  53. u64 count, bool sync);
  54. #endif /* CONFIG_NFSD_V4 */
  55. __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *,
  56. char *name, int len, struct iattr *attrs,
  57. int type, dev_t rdev, struct svc_fh *res);
  58. __be32 nfsd_create(struct svc_rqst *, struct svc_fh *,
  59. char *name, int len, struct iattr *attrs,
  60. int type, dev_t rdev, struct svc_fh *res);
  61. #ifdef CONFIG_NFSD_V3
  62. __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
  63. __be32 do_nfsd_create(struct svc_rqst *, struct svc_fh *,
  64. char *name, int len, struct iattr *attrs,
  65. struct svc_fh *res, int createmode,
  66. u32 *verifier, bool *truncp, bool *created);
  67. __be32 nfsd_commit(struct svc_rqst *, struct svc_fh *,
  68. loff_t, unsigned long, __be32 *verf);
  69. #endif /* CONFIG_NFSD_V3 */
  70. #ifdef CONFIG_NFSD_V4
  71. __be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
  72. char *name, void **bufp, int *lenp);
  73. __be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
  74. char **bufp, int *lenp);
  75. __be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
  76. char *name);
  77. __be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
  78. char *name, void *buf, u32 len, u32 flags);
  79. #endif
  80. int nfsd_open_break_lease(struct inode *, int);
  81. __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t,
  82. int, struct file **);
  83. __be32 nfsd_open_verified(struct svc_rqst *, struct svc_fh *, umode_t,
  84. int, struct file **);
  85. __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
  86. struct file *file, loff_t offset,
  87. unsigned long *count,
  88. u32 *eof);
  89. __be32 nfsd_readv(struct svc_rqst *rqstp, struct svc_fh *fhp,
  90. struct file *file, loff_t offset,
  91. struct kvec *vec, int vlen,
  92. unsigned long *count,
  93. u32 *eof);
  94. __be32 nfsd_read(struct svc_rqst *, struct svc_fh *,
  95. loff_t, struct kvec *, int, unsigned long *,
  96. u32 *eof);
  97. __be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t,
  98. struct kvec *, int, unsigned long *,
  99. int stable, __be32 *verf);
  100. __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
  101. struct nfsd_file *nf, loff_t offset,
  102. struct kvec *vec, int vlen, unsigned long *cnt,
  103. int stable, __be32 *verf);
  104. __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *,
  105. char *, int *);
  106. __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *,
  107. char *name, int len, char *path,
  108. struct svc_fh *res);
  109. __be32 nfsd_link(struct svc_rqst *, struct svc_fh *,
  110. char *, int, struct svc_fh *);
  111. ssize_t nfsd_copy_file_range(struct file *, u64,
  112. struct file *, u64, u64);
  113. __be32 nfsd_rename(struct svc_rqst *,
  114. struct svc_fh *, char *, int,
  115. struct svc_fh *, char *, int);
  116. __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
  117. char *name, int len);
  118. __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *,
  119. loff_t *, struct readdir_cd *, nfsd_filldir_t);
  120. __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *,
  121. struct kstatfs *, int access);
  122. __be32 nfsd_permission(struct svc_rqst *, struct svc_export *,
  123. struct dentry *, int);
  124. static inline int fh_want_write(struct svc_fh *fh)
  125. {
  126. int ret;
  127. if (fh->fh_want_write)
  128. return 0;
  129. ret = mnt_want_write(fh->fh_export->ex_path.mnt);
  130. if (!ret)
  131. fh->fh_want_write = true;
  132. return ret;
  133. }
  134. static inline void fh_drop_write(struct svc_fh *fh)
  135. {
  136. if (fh->fh_want_write) {
  137. fh->fh_want_write = false;
  138. mnt_drop_write(fh->fh_export->ex_path.mnt);
  139. }
  140. }
  141. static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat)
  142. {
  143. struct path p = {.mnt = fh->fh_export->ex_path.mnt,
  144. .dentry = fh->fh_dentry};
  145. return nfserrno(vfs_getattr(&p, stat, STATX_BASIC_STATS,
  146. AT_STATX_SYNC_AS_STAT));
  147. }
  148. static inline int nfsd_create_is_exclusive(int createmode)
  149. {
  150. return createmode == NFS3_CREATE_EXCLUSIVE
  151. || createmode == NFS4_CREATE_EXCLUSIVE4_1;
  152. }
  153. #endif /* LINUX_NFSD_VFS_H */