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@@ -1,468 +1,488 b'' | |||||
1 | use std::borrow::Cow; |
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1 | use std::borrow::Cow; | |
2 | use std::convert::TryFrom; |
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2 | use std::convert::TryFrom; | |
3 | use std::io::Read; |
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3 | use std::io::Read; | |
4 | use std::ops::Deref; |
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4 | use std::ops::Deref; | |
5 | use std::path::Path; |
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5 | use std::path::Path; | |
6 |
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6 | |||
7 | use flate2::read::ZlibDecoder; |
|
7 | use flate2::read::ZlibDecoder; | |
8 | use micro_timer::timed; |
|
8 | use micro_timer::timed; | |
9 | use sha1::{Digest, Sha1}; |
|
9 | use sha1::{Digest, Sha1}; | |
10 | use zstd; |
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10 | use zstd; | |
11 |
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11 | |||
12 | use super::index::Index; |
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12 | use super::index::Index; | |
13 | use super::node::{NodePrefix, NODE_BYTES_LENGTH, NULL_NODE}; |
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13 | use super::node::{NodePrefix, NODE_BYTES_LENGTH, NULL_NODE}; | |
14 | use super::nodemap; |
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14 | use super::nodemap; | |
15 | use super::nodemap::{NodeMap, NodeMapError}; |
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15 | use super::nodemap::{NodeMap, NodeMapError}; | |
16 | use super::nodemap_docket::NodeMapDocket; |
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16 | use super::nodemap_docket::NodeMapDocket; | |
17 | use super::patch; |
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17 | use super::patch; | |
18 | use crate::errors::HgError; |
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18 | use crate::errors::HgError; | |
19 | use crate::repo::Repo; |
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19 | use crate::repo::Repo; | |
20 | use crate::revlog::Revision; |
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20 | use crate::revlog::Revision; | |
21 | use crate::{Node, NULL_REVISION}; |
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21 | use crate::{Node, NULL_REVISION}; | |
22 |
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22 | |||
23 | const REVISION_FLAG_CENSORED: u16 = 1 << 15; |
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23 | const REVISION_FLAG_CENSORED: u16 = 1 << 15; | |
24 | const REVISION_FLAG_ELLIPSIS: u16 = 1 << 14; |
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24 | const REVISION_FLAG_ELLIPSIS: u16 = 1 << 14; | |
25 | const REVISION_FLAG_EXTSTORED: u16 = 1 << 13; |
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25 | const REVISION_FLAG_EXTSTORED: u16 = 1 << 13; | |
26 | const REVISION_FLAG_HASCOPIESINFO: u16 = 1 << 12; |
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26 | const REVISION_FLAG_HASCOPIESINFO: u16 = 1 << 12; | |
27 |
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27 | |||
28 | // Keep this in sync with REVIDX_KNOWN_FLAGS in |
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28 | // Keep this in sync with REVIDX_KNOWN_FLAGS in | |
29 | // mercurial/revlogutils/flagutil.py |
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29 | // mercurial/revlogutils/flagutil.py | |
30 | const REVIDX_KNOWN_FLAGS: u16 = REVISION_FLAG_CENSORED |
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30 | const REVIDX_KNOWN_FLAGS: u16 = REVISION_FLAG_CENSORED | |
31 | | REVISION_FLAG_ELLIPSIS |
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31 | | REVISION_FLAG_ELLIPSIS | |
32 | | REVISION_FLAG_EXTSTORED |
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32 | | REVISION_FLAG_EXTSTORED | |
33 | | REVISION_FLAG_HASCOPIESINFO; |
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33 | | REVISION_FLAG_HASCOPIESINFO; | |
34 |
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34 | |||
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35 | const NULL_REVLOG_ENTRY_FLAGS: u16 = 0; | |||
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36 | ||||
35 | #[derive(derive_more::From)] |
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37 | #[derive(derive_more::From)] | |
36 | pub enum RevlogError { |
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38 | pub enum RevlogError { | |
37 | InvalidRevision, |
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39 | InvalidRevision, | |
38 | /// Working directory is not supported |
|
40 | /// Working directory is not supported | |
39 | WDirUnsupported, |
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41 | WDirUnsupported, | |
40 | /// Found more than one entry whose ID match the requested prefix |
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42 | /// Found more than one entry whose ID match the requested prefix | |
41 | AmbiguousPrefix, |
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43 | AmbiguousPrefix, | |
42 | #[from] |
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44 | #[from] | |
43 | Other(HgError), |
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45 | Other(HgError), | |
44 | } |
|
46 | } | |
45 |
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47 | |||
46 | impl From<NodeMapError> for RevlogError { |
|
48 | impl From<NodeMapError> for RevlogError { | |
47 | fn from(error: NodeMapError) -> Self { |
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49 | fn from(error: NodeMapError) -> Self { | |
48 | match error { |
|
50 | match error { | |
49 | NodeMapError::MultipleResults => RevlogError::AmbiguousPrefix, |
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51 | NodeMapError::MultipleResults => RevlogError::AmbiguousPrefix, | |
50 | NodeMapError::RevisionNotInIndex(_) => RevlogError::corrupted(), |
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52 | NodeMapError::RevisionNotInIndex(_) => RevlogError::corrupted(), | |
51 | } |
|
53 | } | |
52 | } |
|
54 | } | |
53 | } |
|
55 | } | |
54 |
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56 | |||
55 | fn corrupted() -> HgError { |
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57 | fn corrupted() -> HgError { | |
56 | HgError::corrupted("corrupted revlog") |
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58 | HgError::corrupted("corrupted revlog") | |
57 | } |
|
59 | } | |
58 |
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60 | |||
59 | impl RevlogError { |
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61 | impl RevlogError { | |
60 | fn corrupted() -> Self { |
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62 | fn corrupted() -> Self { | |
61 | RevlogError::Other(corrupted()) |
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63 | RevlogError::Other(corrupted()) | |
62 | } |
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64 | } | |
63 | } |
|
65 | } | |
64 |
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66 | |||
65 | /// Read only implementation of revlog. |
|
67 | /// Read only implementation of revlog. | |
66 | pub struct Revlog { |
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68 | pub struct Revlog { | |
67 | /// When index and data are not interleaved: bytes of the revlog index. |
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69 | /// When index and data are not interleaved: bytes of the revlog index. | |
68 | /// When index and data are interleaved: bytes of the revlog index and |
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70 | /// When index and data are interleaved: bytes of the revlog index and | |
69 | /// data. |
|
71 | /// data. | |
70 | index: Index, |
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72 | index: Index, | |
71 | /// When index and data are not interleaved: bytes of the revlog data |
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73 | /// When index and data are not interleaved: bytes of the revlog data | |
72 | data_bytes: Option<Box<dyn Deref<Target = [u8]> + Send>>, |
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74 | data_bytes: Option<Box<dyn Deref<Target = [u8]> + Send>>, | |
73 | /// When present on disk: the persistent nodemap for this revlog |
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75 | /// When present on disk: the persistent nodemap for this revlog | |
74 | nodemap: Option<nodemap::NodeTree>, |
|
76 | nodemap: Option<nodemap::NodeTree>, | |
75 | } |
|
77 | } | |
76 |
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78 | |||
77 | impl Revlog { |
|
79 | impl Revlog { | |
78 | /// Open a revlog index file. |
|
80 | /// Open a revlog index file. | |
79 | /// |
|
81 | /// | |
80 | /// It will also open the associated data file if index and data are not |
|
82 | /// It will also open the associated data file if index and data are not | |
81 | /// interleaved. |
|
83 | /// interleaved. | |
82 | #[timed] |
|
84 | #[timed] | |
83 | pub fn open( |
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85 | pub fn open( | |
84 | repo: &Repo, |
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86 | repo: &Repo, | |
85 | index_path: impl AsRef<Path>, |
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87 | index_path: impl AsRef<Path>, | |
86 | data_path: Option<&Path>, |
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88 | data_path: Option<&Path>, | |
87 | ) -> Result<Self, HgError> { |
|
89 | ) -> Result<Self, HgError> { | |
88 | let index_path = index_path.as_ref(); |
|
90 | let index_path = index_path.as_ref(); | |
89 | let index = { |
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91 | let index = { | |
90 | match repo.store_vfs().mmap_open_opt(&index_path)? { |
|
92 | match repo.store_vfs().mmap_open_opt(&index_path)? { | |
91 | None => Index::new(Box::new(vec![])), |
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93 | None => Index::new(Box::new(vec![])), | |
92 | Some(index_mmap) => { |
|
94 | Some(index_mmap) => { | |
93 | let index = Index::new(Box::new(index_mmap))?; |
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95 | let index = Index::new(Box::new(index_mmap))?; | |
94 | Ok(index) |
|
96 | Ok(index) | |
95 | } |
|
97 | } | |
96 | } |
|
98 | } | |
97 | }?; |
|
99 | }?; | |
98 |
|
100 | |||
99 | let default_data_path = index_path.with_extension("d"); |
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101 | let default_data_path = index_path.with_extension("d"); | |
100 |
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102 | |||
101 | // type annotation required |
|
103 | // type annotation required | |
102 | // won't recognize Mmap as Deref<Target = [u8]> |
|
104 | // won't recognize Mmap as Deref<Target = [u8]> | |
103 | let data_bytes: Option<Box<dyn Deref<Target = [u8]> + Send>> = |
|
105 | let data_bytes: Option<Box<dyn Deref<Target = [u8]> + Send>> = | |
104 | if index.is_inline() { |
|
106 | if index.is_inline() { | |
105 | None |
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107 | None | |
106 | } else { |
|
108 | } else { | |
107 | let data_path = data_path.unwrap_or(&default_data_path); |
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109 | let data_path = data_path.unwrap_or(&default_data_path); | |
108 | let data_mmap = repo.store_vfs().mmap_open(data_path)?; |
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110 | let data_mmap = repo.store_vfs().mmap_open(data_path)?; | |
109 | Some(Box::new(data_mmap)) |
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111 | Some(Box::new(data_mmap)) | |
110 | }; |
|
112 | }; | |
111 |
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113 | |||
112 | let nodemap = if index.is_inline() { |
|
114 | let nodemap = if index.is_inline() { | |
113 | None |
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115 | None | |
114 | } else { |
|
116 | } else { | |
115 | NodeMapDocket::read_from_file(repo, index_path)?.map( |
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117 | NodeMapDocket::read_from_file(repo, index_path)?.map( | |
116 | |(docket, data)| { |
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118 | |(docket, data)| { | |
117 | nodemap::NodeTree::load_bytes( |
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119 | nodemap::NodeTree::load_bytes( | |
118 | Box::new(data), |
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120 | Box::new(data), | |
119 | docket.data_length, |
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121 | docket.data_length, | |
120 | ) |
|
122 | ) | |
121 | }, |
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123 | }, | |
122 | ) |
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124 | ) | |
123 | }; |
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125 | }; | |
124 |
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126 | |||
125 | Ok(Revlog { |
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127 | Ok(Revlog { | |
126 | index, |
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128 | index, | |
127 | data_bytes, |
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129 | data_bytes, | |
128 | nodemap, |
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130 | nodemap, | |
129 | }) |
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131 | }) | |
130 | } |
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132 | } | |
131 |
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133 | |||
132 | /// Return number of entries of the `Revlog`. |
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134 | /// Return number of entries of the `Revlog`. | |
133 | pub fn len(&self) -> usize { |
|
135 | pub fn len(&self) -> usize { | |
134 | self.index.len() |
|
136 | self.index.len() | |
135 | } |
|
137 | } | |
136 |
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138 | |||
137 | /// Returns `true` if the `Revlog` has zero `entries`. |
|
139 | /// Returns `true` if the `Revlog` has zero `entries`. | |
138 | pub fn is_empty(&self) -> bool { |
|
140 | pub fn is_empty(&self) -> bool { | |
139 | self.index.is_empty() |
|
141 | self.index.is_empty() | |
140 | } |
|
142 | } | |
141 |
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143 | |||
142 | /// Returns the node ID for the given revision number, if it exists in this |
|
144 | /// Returns the node ID for the given revision number, if it exists in this | |
143 | /// revlog |
|
145 | /// revlog | |
144 | pub fn node_from_rev(&self, rev: Revision) -> Option<&Node> { |
|
146 | pub fn node_from_rev(&self, rev: Revision) -> Option<&Node> { | |
145 | if rev == NULL_REVISION { |
|
147 | if rev == NULL_REVISION { | |
146 | return Some(&NULL_NODE); |
|
148 | return Some(&NULL_NODE); | |
147 | } |
|
149 | } | |
148 | Some(self.index.get_entry(rev)?.hash()) |
|
150 | Some(self.index.get_entry(rev)?.hash()) | |
149 | } |
|
151 | } | |
150 |
|
152 | |||
151 | /// Return the revision number for the given node ID, if it exists in this |
|
153 | /// Return the revision number for the given node ID, if it exists in this | |
152 | /// revlog |
|
154 | /// revlog | |
153 | #[timed] |
|
155 | #[timed] | |
154 | pub fn rev_from_node( |
|
156 | pub fn rev_from_node( | |
155 | &self, |
|
157 | &self, | |
156 | node: NodePrefix, |
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158 | node: NodePrefix, | |
157 | ) -> Result<Revision, RevlogError> { |
|
159 | ) -> Result<Revision, RevlogError> { | |
158 | if node.is_prefix_of(&NULL_NODE) { |
|
160 | if node.is_prefix_of(&NULL_NODE) { | |
159 | return Ok(NULL_REVISION); |
|
161 | return Ok(NULL_REVISION); | |
160 | } |
|
162 | } | |
161 |
|
163 | |||
162 | if let Some(nodemap) = &self.nodemap { |
|
164 | if let Some(nodemap) = &self.nodemap { | |
163 | return nodemap |
|
165 | return nodemap | |
164 | .find_bin(&self.index, node)? |
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166 | .find_bin(&self.index, node)? | |
165 | .ok_or(RevlogError::InvalidRevision); |
|
167 | .ok_or(RevlogError::InvalidRevision); | |
166 | } |
|
168 | } | |
167 |
|
169 | |||
168 | // Fallback to linear scan when a persistent nodemap is not present. |
|
170 | // Fallback to linear scan when a persistent nodemap is not present. | |
169 | // This happens when the persistent-nodemap experimental feature is not |
|
171 | // This happens when the persistent-nodemap experimental feature is not | |
170 | // enabled, or for small revlogs. |
|
172 | // enabled, or for small revlogs. | |
171 | // |
|
173 | // | |
172 | // TODO: consider building a non-persistent nodemap in memory to |
|
174 | // TODO: consider building a non-persistent nodemap in memory to | |
173 | // optimize these cases. |
|
175 | // optimize these cases. | |
174 | let mut found_by_prefix = None; |
|
176 | let mut found_by_prefix = None; | |
175 | for rev in (0..self.len() as Revision).rev() { |
|
177 | for rev in (0..self.len() as Revision).rev() { | |
176 | let index_entry = |
|
178 | let index_entry = | |
177 | self.index.get_entry(rev).ok_or(HgError::corrupted( |
|
179 | self.index.get_entry(rev).ok_or(HgError::corrupted( | |
178 | "revlog references a revision not in the index", |
|
180 | "revlog references a revision not in the index", | |
179 | ))?; |
|
181 | ))?; | |
180 | if node == *index_entry.hash() { |
|
182 | if node == *index_entry.hash() { | |
181 | return Ok(rev); |
|
183 | return Ok(rev); | |
182 | } |
|
184 | } | |
183 | if node.is_prefix_of(index_entry.hash()) { |
|
185 | if node.is_prefix_of(index_entry.hash()) { | |
184 | if found_by_prefix.is_some() { |
|
186 | if found_by_prefix.is_some() { | |
185 | return Err(RevlogError::AmbiguousPrefix); |
|
187 | return Err(RevlogError::AmbiguousPrefix); | |
186 | } |
|
188 | } | |
187 | found_by_prefix = Some(rev) |
|
189 | found_by_prefix = Some(rev) | |
188 | } |
|
190 | } | |
189 | } |
|
191 | } | |
190 | found_by_prefix.ok_or(RevlogError::InvalidRevision) |
|
192 | found_by_prefix.ok_or(RevlogError::InvalidRevision) | |
191 | } |
|
193 | } | |
192 |
|
194 | |||
193 | /// Returns whether the given revision exists in this revlog. |
|
195 | /// Returns whether the given revision exists in this revlog. | |
194 | pub fn has_rev(&self, rev: Revision) -> bool { |
|
196 | pub fn has_rev(&self, rev: Revision) -> bool { | |
195 | self.index.get_entry(rev).is_some() |
|
197 | self.index.get_entry(rev).is_some() | |
196 | } |
|
198 | } | |
197 |
|
199 | |||
198 | /// Return the full data associated to a revision. |
|
200 | /// Return the full data associated to a revision. | |
199 | /// |
|
201 | /// | |
200 | /// All entries required to build the final data out of deltas will be |
|
202 | /// All entries required to build the final data out of deltas will be | |
201 | /// retrieved as needed, and the deltas will be applied to the inital |
|
203 | /// retrieved as needed, and the deltas will be applied to the inital | |
202 | /// snapshot to rebuild the final data. |
|
204 | /// snapshot to rebuild the final data. | |
203 | #[timed] |
|
205 | #[timed] | |
204 | pub fn get_rev_data( |
|
206 | pub fn get_rev_data( | |
205 | &self, |
|
207 | &self, | |
206 | rev: Revision, |
|
208 | rev: Revision, | |
207 | ) -> Result<Cow<[u8]>, RevlogError> { |
|
209 | ) -> Result<Cow<[u8]>, RevlogError> { | |
208 | if rev == NULL_REVISION { |
|
210 | if rev == NULL_REVISION { | |
209 | return Ok(Cow::Borrowed(&[])); |
|
211 | return Ok(Cow::Borrowed(&[])); | |
210 | }; |
|
212 | }; | |
211 | Ok(self.get_entry(rev)?.data()?) |
|
213 | Ok(self.get_entry(rev)?.data()?) | |
212 | } |
|
214 | } | |
213 |
|
215 | |||
214 | /// Check the hash of some given data against the recorded hash. |
|
216 | /// Check the hash of some given data against the recorded hash. | |
215 | pub fn check_hash( |
|
217 | pub fn check_hash( | |
216 | &self, |
|
218 | &self, | |
217 | p1: Revision, |
|
219 | p1: Revision, | |
218 | p2: Revision, |
|
220 | p2: Revision, | |
219 | expected: &[u8], |
|
221 | expected: &[u8], | |
220 | data: &[u8], |
|
222 | data: &[u8], | |
221 | ) -> bool { |
|
223 | ) -> bool { | |
222 | let e1 = self.index.get_entry(p1); |
|
224 | let e1 = self.index.get_entry(p1); | |
223 | let h1 = match e1 { |
|
225 | let h1 = match e1 { | |
224 | Some(ref entry) => entry.hash(), |
|
226 | Some(ref entry) => entry.hash(), | |
225 | None => &NULL_NODE, |
|
227 | None => &NULL_NODE, | |
226 | }; |
|
228 | }; | |
227 | let e2 = self.index.get_entry(p2); |
|
229 | let e2 = self.index.get_entry(p2); | |
228 | let h2 = match e2 { |
|
230 | let h2 = match e2 { | |
229 | Some(ref entry) => entry.hash(), |
|
231 | Some(ref entry) => entry.hash(), | |
230 | None => &NULL_NODE, |
|
232 | None => &NULL_NODE, | |
231 | }; |
|
233 | }; | |
232 |
|
234 | |||
233 | &hash(data, h1.as_bytes(), h2.as_bytes()) == expected |
|
235 | &hash(data, h1.as_bytes(), h2.as_bytes()) == expected | |
234 | } |
|
236 | } | |
235 |
|
237 | |||
236 | /// Build the full data of a revision out its snapshot |
|
238 | /// Build the full data of a revision out its snapshot | |
237 | /// and its deltas. |
|
239 | /// and its deltas. | |
238 | #[timed] |
|
240 | #[timed] | |
239 | fn build_data_from_deltas( |
|
241 | fn build_data_from_deltas( | |
240 | snapshot: RevlogEntry, |
|
242 | snapshot: RevlogEntry, | |
241 | deltas: &[RevlogEntry], |
|
243 | deltas: &[RevlogEntry], | |
242 | ) -> Result<Vec<u8>, HgError> { |
|
244 | ) -> Result<Vec<u8>, HgError> { | |
243 | let snapshot = snapshot.data_chunk()?; |
|
245 | let snapshot = snapshot.data_chunk()?; | |
244 | let deltas = deltas |
|
246 | let deltas = deltas | |
245 | .iter() |
|
247 | .iter() | |
246 | .rev() |
|
248 | .rev() | |
247 | .map(RevlogEntry::data_chunk) |
|
249 | .map(RevlogEntry::data_chunk) | |
248 | .collect::<Result<Vec<_>, _>>()?; |
|
250 | .collect::<Result<Vec<_>, _>>()?; | |
249 | let patches: Vec<_> = |
|
251 | let patches: Vec<_> = | |
250 | deltas.iter().map(|d| patch::PatchList::new(d)).collect(); |
|
252 | deltas.iter().map(|d| patch::PatchList::new(d)).collect(); | |
251 | let patch = patch::fold_patch_lists(&patches); |
|
253 | let patch = patch::fold_patch_lists(&patches); | |
252 | Ok(patch.apply(&snapshot)) |
|
254 | Ok(patch.apply(&snapshot)) | |
253 | } |
|
255 | } | |
254 |
|
256 | |||
255 | /// Return the revlog data. |
|
257 | /// Return the revlog data. | |
256 | fn data(&self) -> &[u8] { |
|
258 | fn data(&self) -> &[u8] { | |
257 | match self.data_bytes { |
|
259 | match self.data_bytes { | |
258 | Some(ref data_bytes) => &data_bytes, |
|
260 | Some(ref data_bytes) => &data_bytes, | |
259 | None => panic!( |
|
261 | None => panic!( | |
260 | "forgot to load the data or trying to access inline data" |
|
262 | "forgot to load the data or trying to access inline data" | |
261 | ), |
|
263 | ), | |
262 | } |
|
264 | } | |
263 | } |
|
265 | } | |
264 |
|
266 | |||
|
267 | pub fn make_null_entry(&self) -> RevlogEntry { | |||
|
268 | RevlogEntry { | |||
|
269 | revlog: self, | |||
|
270 | rev: NULL_REVISION, | |||
|
271 | bytes: b"", | |||
|
272 | compressed_len: 0, | |||
|
273 | uncompressed_len: 0, | |||
|
274 | base_rev_or_base_of_delta_chain: None, | |||
|
275 | p1: NULL_REVISION, | |||
|
276 | p2: NULL_REVISION, | |||
|
277 | flags: NULL_REVLOG_ENTRY_FLAGS, | |||
|
278 | hash: NULL_NODE, | |||
|
279 | } | |||
|
280 | } | |||
|
281 | ||||
265 | /// Get an entry of the revlog. |
|
282 | /// Get an entry of the revlog. | |
266 | pub fn get_entry( |
|
283 | pub fn get_entry( | |
267 | &self, |
|
284 | &self, | |
268 | rev: Revision, |
|
285 | rev: Revision, | |
269 | ) -> Result<RevlogEntry, RevlogError> { |
|
286 | ) -> Result<RevlogEntry, RevlogError> { | |
|
287 | if rev == NULL_REVISION { | |||
|
288 | return Ok(self.make_null_entry()); | |||
|
289 | } | |||
270 | let index_entry = self |
|
290 | let index_entry = self | |
271 | .index |
|
291 | .index | |
272 | .get_entry(rev) |
|
292 | .get_entry(rev) | |
273 | .ok_or(RevlogError::InvalidRevision)?; |
|
293 | .ok_or(RevlogError::InvalidRevision)?; | |
274 | let start = index_entry.offset(); |
|
294 | let start = index_entry.offset(); | |
275 | let end = start + index_entry.compressed_len() as usize; |
|
295 | let end = start + index_entry.compressed_len() as usize; | |
276 | let data = if self.index.is_inline() { |
|
296 | let data = if self.index.is_inline() { | |
277 | self.index.data(start, end) |
|
297 | self.index.data(start, end) | |
278 | } else { |
|
298 | } else { | |
279 | &self.data()[start..end] |
|
299 | &self.data()[start..end] | |
280 | }; |
|
300 | }; | |
281 | let entry = RevlogEntry { |
|
301 | let entry = RevlogEntry { | |
282 | revlog: self, |
|
302 | revlog: self, | |
283 | rev, |
|
303 | rev, | |
284 | bytes: data, |
|
304 | bytes: data, | |
285 | compressed_len: index_entry.compressed_len(), |
|
305 | compressed_len: index_entry.compressed_len(), | |
286 | uncompressed_len: index_entry.uncompressed_len(), |
|
306 | uncompressed_len: index_entry.uncompressed_len(), | |
287 | base_rev_or_base_of_delta_chain: if index_entry |
|
307 | base_rev_or_base_of_delta_chain: if index_entry | |
288 | .base_revision_or_base_of_delta_chain() |
|
308 | .base_revision_or_base_of_delta_chain() | |
289 | == rev |
|
309 | == rev | |
290 | { |
|
310 | { | |
291 | None |
|
311 | None | |
292 | } else { |
|
312 | } else { | |
293 | Some(index_entry.base_revision_or_base_of_delta_chain()) |
|
313 | Some(index_entry.base_revision_or_base_of_delta_chain()) | |
294 | }, |
|
314 | }, | |
295 | p1: index_entry.p1(), |
|
315 | p1: index_entry.p1(), | |
296 | p2: index_entry.p2(), |
|
316 | p2: index_entry.p2(), | |
297 | flags: index_entry.flags(), |
|
317 | flags: index_entry.flags(), | |
298 | hash: *index_entry.hash(), |
|
318 | hash: *index_entry.hash(), | |
299 | }; |
|
319 | }; | |
300 | Ok(entry) |
|
320 | Ok(entry) | |
301 | } |
|
321 | } | |
302 |
|
322 | |||
303 | /// when resolving internal references within revlog, any errors |
|
323 | /// when resolving internal references within revlog, any errors | |
304 | /// should be reported as corruption, instead of e.g. "invalid revision" |
|
324 | /// should be reported as corruption, instead of e.g. "invalid revision" | |
305 | fn get_entry_internal( |
|
325 | fn get_entry_internal( | |
306 | &self, |
|
326 | &self, | |
307 | rev: Revision, |
|
327 | rev: Revision, | |
308 | ) -> Result<RevlogEntry, HgError> { |
|
328 | ) -> Result<RevlogEntry, HgError> { | |
309 | return self.get_entry(rev).map_err(|_| corrupted()); |
|
329 | return self.get_entry(rev).map_err(|_| corrupted()); | |
310 | } |
|
330 | } | |
311 | } |
|
331 | } | |
312 |
|
332 | |||
313 | /// The revlog entry's bytes and the necessary informations to extract |
|
333 | /// The revlog entry's bytes and the necessary informations to extract | |
314 | /// the entry's data. |
|
334 | /// the entry's data. | |
315 | #[derive(Clone)] |
|
335 | #[derive(Clone)] | |
316 | pub struct RevlogEntry<'a> { |
|
336 | pub struct RevlogEntry<'a> { | |
317 | revlog: &'a Revlog, |
|
337 | revlog: &'a Revlog, | |
318 | rev: Revision, |
|
338 | rev: Revision, | |
319 | bytes: &'a [u8], |
|
339 | bytes: &'a [u8], | |
320 | compressed_len: u32, |
|
340 | compressed_len: u32, | |
321 | uncompressed_len: i32, |
|
341 | uncompressed_len: i32, | |
322 | base_rev_or_base_of_delta_chain: Option<Revision>, |
|
342 | base_rev_or_base_of_delta_chain: Option<Revision>, | |
323 | p1: Revision, |
|
343 | p1: Revision, | |
324 | p2: Revision, |
|
344 | p2: Revision, | |
325 | flags: u16, |
|
345 | flags: u16, | |
326 | hash: Node, |
|
346 | hash: Node, | |
327 | } |
|
347 | } | |
328 |
|
348 | |||
329 | impl<'a> RevlogEntry<'a> { |
|
349 | impl<'a> RevlogEntry<'a> { | |
330 | pub fn revision(&self) -> Revision { |
|
350 | pub fn revision(&self) -> Revision { | |
331 | self.rev |
|
351 | self.rev | |
332 | } |
|
352 | } | |
333 |
|
353 | |||
334 | pub fn uncompressed_len(&self) -> Option<u32> { |
|
354 | pub fn uncompressed_len(&self) -> Option<u32> { | |
335 | u32::try_from(self.uncompressed_len).ok() |
|
355 | u32::try_from(self.uncompressed_len).ok() | |
336 | } |
|
356 | } | |
337 |
|
357 | |||
338 | pub fn has_p1(&self) -> bool { |
|
358 | pub fn has_p1(&self) -> bool { | |
339 | self.p1 != NULL_REVISION |
|
359 | self.p1 != NULL_REVISION | |
340 | } |
|
360 | } | |
341 |
|
361 | |||
342 | pub fn is_cencored(&self) -> bool { |
|
362 | pub fn is_cencored(&self) -> bool { | |
343 | (self.flags & REVISION_FLAG_CENSORED) != 0 |
|
363 | (self.flags & REVISION_FLAG_CENSORED) != 0 | |
344 | } |
|
364 | } | |
345 |
|
365 | |||
346 | pub fn has_length_affecting_flag_processor(&self) -> bool { |
|
366 | pub fn has_length_affecting_flag_processor(&self) -> bool { | |
347 | // Relevant Python code: revlog.size() |
|
367 | // Relevant Python code: revlog.size() | |
348 | // note: ELLIPSIS is known to not change the content |
|
368 | // note: ELLIPSIS is known to not change the content | |
349 | (self.flags & (REVIDX_KNOWN_FLAGS ^ REVISION_FLAG_ELLIPSIS)) != 0 |
|
369 | (self.flags & (REVIDX_KNOWN_FLAGS ^ REVISION_FLAG_ELLIPSIS)) != 0 | |
350 | } |
|
370 | } | |
351 |
|
371 | |||
352 | /// The data for this entry, after resolving deltas if any. |
|
372 | /// The data for this entry, after resolving deltas if any. | |
353 | pub fn data(&self) -> Result<Cow<'a, [u8]>, HgError> { |
|
373 | pub fn data(&self) -> Result<Cow<'a, [u8]>, HgError> { | |
354 | let mut entry = self.clone(); |
|
374 | let mut entry = self.clone(); | |
355 | let mut delta_chain = vec![]; |
|
375 | let mut delta_chain = vec![]; | |
356 |
|
376 | |||
357 | // The meaning of `base_rev_or_base_of_delta_chain` depends on |
|
377 | // The meaning of `base_rev_or_base_of_delta_chain` depends on | |
358 | // generaldelta. See the doc on `ENTRY_DELTA_BASE` in |
|
378 | // generaldelta. See the doc on `ENTRY_DELTA_BASE` in | |
359 | // `mercurial/revlogutils/constants.py` and the code in |
|
379 | // `mercurial/revlogutils/constants.py` and the code in | |
360 | // [_chaininfo] and in [index_deltachain]. |
|
380 | // [_chaininfo] and in [index_deltachain]. | |
361 | let uses_generaldelta = self.revlog.index.uses_generaldelta(); |
|
381 | let uses_generaldelta = self.revlog.index.uses_generaldelta(); | |
362 | while let Some(base_rev) = entry.base_rev_or_base_of_delta_chain { |
|
382 | while let Some(base_rev) = entry.base_rev_or_base_of_delta_chain { | |
363 | let base_rev = if uses_generaldelta { |
|
383 | let base_rev = if uses_generaldelta { | |
364 | base_rev |
|
384 | base_rev | |
365 | } else { |
|
385 | } else { | |
366 | entry.rev - 1 |
|
386 | entry.rev - 1 | |
367 | }; |
|
387 | }; | |
368 | delta_chain.push(entry); |
|
388 | delta_chain.push(entry); | |
369 | entry = self.revlog.get_entry_internal(base_rev)?; |
|
389 | entry = self.revlog.get_entry_internal(base_rev)?; | |
370 | } |
|
390 | } | |
371 |
|
391 | |||
372 | let data = if delta_chain.is_empty() { |
|
392 | let data = if delta_chain.is_empty() { | |
373 | entry.data_chunk()? |
|
393 | entry.data_chunk()? | |
374 | } else { |
|
394 | } else { | |
375 | Revlog::build_data_from_deltas(entry, &delta_chain)?.into() |
|
395 | Revlog::build_data_from_deltas(entry, &delta_chain)?.into() | |
376 | }; |
|
396 | }; | |
377 |
|
397 | |||
378 | if self.revlog.check_hash( |
|
398 | if self.revlog.check_hash( | |
379 | self.p1, |
|
399 | self.p1, | |
380 | self.p2, |
|
400 | self.p2, | |
381 | self.hash.as_bytes(), |
|
401 | self.hash.as_bytes(), | |
382 | &data, |
|
402 | &data, | |
383 | ) { |
|
403 | ) { | |
384 | Ok(data) |
|
404 | Ok(data) | |
385 | } else { |
|
405 | } else { | |
386 | Err(corrupted()) |
|
406 | Err(corrupted()) | |
387 | } |
|
407 | } | |
388 | } |
|
408 | } | |
389 |
|
409 | |||
390 | /// Extract the data contained in the entry. |
|
410 | /// Extract the data contained in the entry. | |
391 | /// This may be a delta. (See `is_delta`.) |
|
411 | /// This may be a delta. (See `is_delta`.) | |
392 | fn data_chunk(&self) -> Result<Cow<'a, [u8]>, HgError> { |
|
412 | fn data_chunk(&self) -> Result<Cow<'a, [u8]>, HgError> { | |
393 | if self.bytes.is_empty() { |
|
413 | if self.bytes.is_empty() { | |
394 | return Ok(Cow::Borrowed(&[])); |
|
414 | return Ok(Cow::Borrowed(&[])); | |
395 | } |
|
415 | } | |
396 | match self.bytes[0] { |
|
416 | match self.bytes[0] { | |
397 | // Revision data is the entirety of the entry, including this |
|
417 | // Revision data is the entirety of the entry, including this | |
398 | // header. |
|
418 | // header. | |
399 | b'\0' => Ok(Cow::Borrowed(self.bytes)), |
|
419 | b'\0' => Ok(Cow::Borrowed(self.bytes)), | |
400 | // Raw revision data follows. |
|
420 | // Raw revision data follows. | |
401 | b'u' => Ok(Cow::Borrowed(&self.bytes[1..])), |
|
421 | b'u' => Ok(Cow::Borrowed(&self.bytes[1..])), | |
402 | // zlib (RFC 1950) data. |
|
422 | // zlib (RFC 1950) data. | |
403 | b'x' => Ok(Cow::Owned(self.uncompressed_zlib_data()?)), |
|
423 | b'x' => Ok(Cow::Owned(self.uncompressed_zlib_data()?)), | |
404 | // zstd data. |
|
424 | // zstd data. | |
405 | b'\x28' => Ok(Cow::Owned(self.uncompressed_zstd_data()?)), |
|
425 | b'\x28' => Ok(Cow::Owned(self.uncompressed_zstd_data()?)), | |
406 | // A proper new format should have had a repo/store requirement. |
|
426 | // A proper new format should have had a repo/store requirement. | |
407 | _format_type => Err(corrupted()), |
|
427 | _format_type => Err(corrupted()), | |
408 | } |
|
428 | } | |
409 | } |
|
429 | } | |
410 |
|
430 | |||
411 | fn uncompressed_zlib_data(&self) -> Result<Vec<u8>, HgError> { |
|
431 | fn uncompressed_zlib_data(&self) -> Result<Vec<u8>, HgError> { | |
412 | let mut decoder = ZlibDecoder::new(self.bytes); |
|
432 | let mut decoder = ZlibDecoder::new(self.bytes); | |
413 | if self.is_delta() { |
|
433 | if self.is_delta() { | |
414 | let mut buf = Vec::with_capacity(self.compressed_len as usize); |
|
434 | let mut buf = Vec::with_capacity(self.compressed_len as usize); | |
415 | decoder.read_to_end(&mut buf).map_err(|_| corrupted())?; |
|
435 | decoder.read_to_end(&mut buf).map_err(|_| corrupted())?; | |
416 | Ok(buf) |
|
436 | Ok(buf) | |
417 | } else { |
|
437 | } else { | |
418 | let cap = self.uncompressed_len.max(0) as usize; |
|
438 | let cap = self.uncompressed_len.max(0) as usize; | |
419 | let mut buf = vec![0; cap]; |
|
439 | let mut buf = vec![0; cap]; | |
420 | decoder.read_exact(&mut buf).map_err(|_| corrupted())?; |
|
440 | decoder.read_exact(&mut buf).map_err(|_| corrupted())?; | |
421 | Ok(buf) |
|
441 | Ok(buf) | |
422 | } |
|
442 | } | |
423 | } |
|
443 | } | |
424 |
|
444 | |||
425 | fn uncompressed_zstd_data(&self) -> Result<Vec<u8>, HgError> { |
|
445 | fn uncompressed_zstd_data(&self) -> Result<Vec<u8>, HgError> { | |
426 | if self.is_delta() { |
|
446 | if self.is_delta() { | |
427 | let mut buf = Vec::with_capacity(self.compressed_len as usize); |
|
447 | let mut buf = Vec::with_capacity(self.compressed_len as usize); | |
428 | zstd::stream::copy_decode(self.bytes, &mut buf) |
|
448 | zstd::stream::copy_decode(self.bytes, &mut buf) | |
429 | .map_err(|_| corrupted())?; |
|
449 | .map_err(|_| corrupted())?; | |
430 | Ok(buf) |
|
450 | Ok(buf) | |
431 | } else { |
|
451 | } else { | |
432 | let cap = self.uncompressed_len.max(0) as usize; |
|
452 | let cap = self.uncompressed_len.max(0) as usize; | |
433 | let mut buf = vec![0; cap]; |
|
453 | let mut buf = vec![0; cap]; | |
434 | let len = zstd::block::decompress_to_buffer(self.bytes, &mut buf) |
|
454 | let len = zstd::block::decompress_to_buffer(self.bytes, &mut buf) | |
435 | .map_err(|_| corrupted())?; |
|
455 | .map_err(|_| corrupted())?; | |
436 | if len != self.uncompressed_len as usize { |
|
456 | if len != self.uncompressed_len as usize { | |
437 | Err(corrupted()) |
|
457 | Err(corrupted()) | |
438 | } else { |
|
458 | } else { | |
439 | Ok(buf) |
|
459 | Ok(buf) | |
440 | } |
|
460 | } | |
441 | } |
|
461 | } | |
442 | } |
|
462 | } | |
443 |
|
463 | |||
444 | /// Tell if the entry is a snapshot or a delta |
|
464 | /// Tell if the entry is a snapshot or a delta | |
445 | /// (influences on decompression). |
|
465 | /// (influences on decompression). | |
446 | fn is_delta(&self) -> bool { |
|
466 | fn is_delta(&self) -> bool { | |
447 | self.base_rev_or_base_of_delta_chain.is_some() |
|
467 | self.base_rev_or_base_of_delta_chain.is_some() | |
448 | } |
|
468 | } | |
449 | } |
|
469 | } | |
450 |
|
470 | |||
451 | /// Calculate the hash of a revision given its data and its parents. |
|
471 | /// Calculate the hash of a revision given its data and its parents. | |
452 | fn hash( |
|
472 | fn hash( | |
453 | data: &[u8], |
|
473 | data: &[u8], | |
454 | p1_hash: &[u8], |
|
474 | p1_hash: &[u8], | |
455 | p2_hash: &[u8], |
|
475 | p2_hash: &[u8], | |
456 | ) -> [u8; NODE_BYTES_LENGTH] { |
|
476 | ) -> [u8; NODE_BYTES_LENGTH] { | |
457 | let mut hasher = Sha1::new(); |
|
477 | let mut hasher = Sha1::new(); | |
458 | let (a, b) = (p1_hash, p2_hash); |
|
478 | let (a, b) = (p1_hash, p2_hash); | |
459 | if a > b { |
|
479 | if a > b { | |
460 | hasher.update(b); |
|
480 | hasher.update(b); | |
461 | hasher.update(a); |
|
481 | hasher.update(a); | |
462 | } else { |
|
482 | } else { | |
463 | hasher.update(a); |
|
483 | hasher.update(a); | |
464 | hasher.update(b); |
|
484 | hasher.update(b); | |
465 | } |
|
485 | } | |
466 | hasher.update(data); |
|
486 | hasher.update(data); | |
467 | *hasher.finalize().as_ref() |
|
487 | *hasher.finalize().as_ref() | |
468 | } |
|
488 | } |
@@ -1,89 +1,83 b'' | |||||
1 | $ hg init empty-repo |
|
1 | $ hg init empty-repo | |
2 | $ cd empty-repo |
|
2 | $ cd empty-repo | |
3 |
|
3 | |||
4 | Flags on revlog version 0 are rejected |
|
4 | Flags on revlog version 0 are rejected | |
5 |
|
5 | |||
6 | >>> with open('.hg/store/00changelog.i', 'wb') as fh: |
|
6 | >>> with open('.hg/store/00changelog.i', 'wb') as fh: | |
7 | ... fh.write(b'\x00\x01\x00\x00') and None |
|
7 | ... fh.write(b'\x00\x01\x00\x00') and None | |
8 |
|
8 | |||
9 | $ hg log |
|
9 | $ hg log | |
10 | abort: unknown flags (0x01) in version 0 revlog 00changelog |
|
10 | abort: unknown flags (0x01) in version 0 revlog 00changelog | |
11 | [50] |
|
11 | [50] | |
12 |
|
12 | |||
13 | Unknown flags on revlog version 1 are rejected |
|
13 | Unknown flags on revlog version 1 are rejected | |
14 |
|
14 | |||
15 | >>> with open('.hg/store/00changelog.i', 'wb') as fh: |
|
15 | >>> with open('.hg/store/00changelog.i', 'wb') as fh: | |
16 | ... fh.write(b'\x00\x04\x00\x01') and None |
|
16 | ... fh.write(b'\x00\x04\x00\x01') and None | |
17 |
|
17 | |||
18 | $ hg log |
|
18 | $ hg log | |
19 | abort: unknown flags (0x04) in version 1 revlog 00changelog |
|
19 | abort: unknown flags (0x04) in version 1 revlog 00changelog | |
20 | [50] |
|
20 | [50] | |
21 |
|
21 | |||
22 | Unknown version is rejected |
|
22 | Unknown version is rejected | |
23 |
|
23 | |||
24 | >>> with open('.hg/store/00changelog.i', 'wb') as fh: |
|
24 | >>> with open('.hg/store/00changelog.i', 'wb') as fh: | |
25 | ... fh.write(b'\x00\x00\xbe\xef') and None |
|
25 | ... fh.write(b'\x00\x00\xbe\xef') and None | |
26 |
|
26 | |||
27 | $ hg log |
|
27 | $ hg log | |
28 | abort: unknown version (48879) in revlog 00changelog |
|
28 | abort: unknown version (48879) in revlog 00changelog | |
29 | [50] |
|
29 | [50] | |
30 |
|
30 | |||
31 | $ cd .. |
|
31 | $ cd .. | |
32 |
|
32 | |||
33 | Test for CVE-2016-3630 |
|
33 | Test for CVE-2016-3630 | |
34 |
|
34 | |||
35 | $ mkdir test2; cd test2 |
|
35 | $ mkdir test2; cd test2 | |
36 | $ hg init |
|
36 | $ hg init | |
37 |
|
37 | |||
38 | >>> import codecs |
|
38 | >>> import codecs | |
39 | >>> open("a.i", "wb").write(codecs.decode(codecs.decode( |
|
39 | >>> open("a.i", "wb").write(codecs.decode(codecs.decode( | |
40 | ... b"""eJxjYGZgZIAAYQYGxhgom+k/FMx8YKx9ZUaKSOyqo4cnuKb8mbqHV5cBCVTMWb1Cwqkhe4Gsg9AD |
|
40 | ... b"""eJxjYGZgZIAAYQYGxhgom+k/FMx8YKx9ZUaKSOyqo4cnuKb8mbqHV5cBCVTMWb1Cwqkhe4Gsg9AD | |
41 | ... Joa3dYtcYYYBAQ8Qr4OqZAYRICPTSr5WKd/42rV36d+8/VmrNpv7NP1jQAXrQE4BqQUARngwVA==""", |
|
41 | ... Joa3dYtcYYYBAQ8Qr4OqZAYRICPTSr5WKd/42rV36d+8/VmrNpv7NP1jQAXrQE4BqQUARngwVA==""", | |
42 | ... "base64"), "zlib")) and None |
|
42 | ... "base64"), "zlib")) and None | |
43 |
|
43 | |||
44 | $ hg debugrevlogindex a.i |
|
44 | $ hg debugrevlogindex a.i | |
45 | rev linkrev nodeid p1 p2 |
|
45 | rev linkrev nodeid p1 p2 | |
46 | 0 2 99e0332bd498 000000000000 000000000000 |
|
46 | 0 2 99e0332bd498 000000000000 000000000000 | |
47 | 1 3 6674f57a23d8 99e0332bd498 000000000000 |
|
47 | 1 3 6674f57a23d8 99e0332bd498 000000000000 | |
48 |
|
48 | |||
49 | >>> from mercurial.revlogutils.constants import KIND_OTHER |
|
49 | >>> from mercurial.revlogutils.constants import KIND_OTHER | |
50 | >>> from mercurial import revlog, vfs |
|
50 | >>> from mercurial import revlog, vfs | |
51 | >>> tvfs = vfs.vfs(b'.') |
|
51 | >>> tvfs = vfs.vfs(b'.') | |
52 | >>> tvfs.options = {b'revlogv1': True} |
|
52 | >>> tvfs.options = {b'revlogv1': True} | |
53 | >>> rl = revlog.revlog(tvfs, target=(KIND_OTHER, b'test'), radix=b'a') |
|
53 | >>> rl = revlog.revlog(tvfs, target=(KIND_OTHER, b'test'), radix=b'a') | |
54 | >>> rl.revision(1) |
|
54 | >>> rl.revision(1) | |
55 | mpatchError(*'patch cannot be decoded'*) (glob) |
|
55 | mpatchError(*'patch cannot be decoded'*) (glob) | |
56 |
|
56 | |||
57 | $ cd .. |
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57 | $ cd .. | |
58 |
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58 | |||
59 |
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59 | |||
60 | Regression test for support for the old repos with strange diff encoding. |
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60 | Regression test for support for the old repos with strange diff encoding. | |
61 | Apparently it used to be possible (maybe it's still possible, but we don't know how) |
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61 | Apparently it used to be possible (maybe it's still possible, but we don't know how) | |
62 | to create commits whose diffs are encoded relative to a nullrev. |
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62 | to create commits whose diffs are encoded relative to a nullrev. | |
63 | This test checks that a repo with that encoding can still be read. |
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63 | This test checks that a repo with that encoding can still be read. | |
64 |
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64 | |||
65 | This is what we did to produce the repo in test-revlog-diff-relative-to-nullrev.tar: |
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65 | This is what we did to produce the repo in test-revlog-diff-relative-to-nullrev.tar: | |
66 |
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66 | |||
67 | - tweak the code in mercurial/revlogutils/deltas.py to produce such "trivial" deltas: |
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67 | - tweak the code in mercurial/revlogutils/deltas.py to produce such "trivial" deltas: | |
68 | > if deltainfo is None: |
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68 | > if deltainfo is None: | |
69 | > - deltainfo = self._fullsnapshotinfo(fh, revinfo, target_rev) |
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69 | > - deltainfo = self._fullsnapshotinfo(fh, revinfo, target_rev) | |
70 | > + deltainfo = self._builddeltainfo(revinfo, nullrev, fh) |
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70 | > + deltainfo = self._builddeltainfo(revinfo, nullrev, fh) | |
71 | - hg init |
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71 | - hg init | |
72 | - echo hi > a |
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72 | - echo hi > a | |
73 | - hg commit -Am_ |
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73 | - hg commit -Am_ | |
74 | - remove some cache files |
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74 | - remove some cache files | |
75 |
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75 | |||
76 | $ tar --force-local -xf "$TESTDIR"/bundles/test-revlog-diff-relative-to-nullrev.tar |
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76 | $ tar --force-local -xf "$TESTDIR"/bundles/test-revlog-diff-relative-to-nullrev.tar | |
77 | $ cd nullrev-diff |
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77 | $ cd nullrev-diff | |
78 | $ hg debugdeltachain a |
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78 | $ hg debugdeltachain a | |
79 | rev chain# chainlen prev delta size rawsize chainsize ratio lindist extradist extraratio readsize largestblk rddensity srchunks |
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79 | rev chain# chainlen prev delta size rawsize chainsize ratio lindist extradist extraratio readsize largestblk rddensity srchunks | |
80 | 0 1 2 -1 p1 15 3 15 5.00000 15 0 0.00000 15 15 1.00000 1 |
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80 | 0 1 2 -1 p1 15 3 15 5.00000 15 0 0.00000 15 15 1.00000 1 | |
81 | #if rhg |
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82 | $ hg cat --config rhg.cat=true -r 0 a |
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83 | abort: corrupted revlog |
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84 | [255] |
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85 | #else |
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86 | $ hg cat --config rhg.cat=true -r 0 a |
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81 | $ hg cat --config rhg.cat=true -r 0 a | |
87 | hi |
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82 | hi | |
88 | #endif |
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89 | $ cd .. |
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83 | $ cd .. |
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